A string is wrapped several times around the rim of a hoop with radius R = 0.25 m and mass M = 0.75 kg. The free end of the string is attached to the ceiling and the hoop is released from rest. The moment of inertia of the hoop about its center is I = MR2 On the diagram above show all the forces applied on the hoop.
Find the acceleration of the center of the hoop when it descends and the string unwinds.
Find the tension force in the string.
Calculate the time it takes the hoop to descend 1 m.
Calculate the angular speed of the hoop after it has traveled 1 m.
Answers
1) The initial velocity of the hoop is 0. 2) T = (0.75 kg)(a) + (0.75 kg)(9.8 m/s² 3) t = \(\sqrt{\frac{2}{a} }\) 4) ω = (1 m / t) / 0.25 m
1. The acceleration of the centre of the hoop
Weight of the hoop (W): This force acts vertically downwards and is equal to the mass of the hoop (M) multiplied by the acceleration due to gravity (g). The initial velocity of the hoop is 0.
2. The tension force in the string
Tension force in the string (T): This force is directed upwards and is responsible for providing the necessary centripetal force to keep the hoop in circular motion.
The force acting on the hoop, which is given by the difference between the tension force and the weight:
Net force = T - W
Using Newton's second law (F = ma), the net force to the acceleration (a) of the hoop:
T - W = Ma
Rearranging the equation:
T = Ma + W
Substituting the values: R = 0.25 m, M = 0.75 kg, and g = 9.8 m/s²2:
T = (0.75 kg)(a) + (0.75 kg)(9.8 m/s²2)
Tension force in the string:
The tension force in the string is the same in both cases. Using the same equation as above:
T = (0.75 kg)(a) + (0.75 kg)(9.8 m/s²2)
3. The time it takes the hoop
Time taken for the hoop to descend 1 m
To calculate the time, To determine the initial velocity of the hoop. Since it starts from rest, the initial velocity is 0. We can use the kinematic equation
s = u t + (1/2)at²2
Here, s is the distance travelled (1 m), u is the initial velocity (0 m/s), a is the acceleration, and t is the time .
Substituting the values: s = 1 m, u = 0 m/s, and solving for t:
1 = (1/2)(a)t²2
t²2 = 2/a
t = sqrt(2/a)
4. Angular speed the angular speed of the hoop
The linear speed (v) of the hoop can be related to its angular speed (ω) using the formula
v = Rω
The linear speed by multiplying the angular speed by the radius of the hoop. Since we know the linear distance travelled (1 m) and the time (t), we can calculate the linear speed:
v = s/t
Finally, the linear speed to the angular speed:
v = Rω
Now, the angular speed (ω) by rearranging the equation:
ω = v/R
Substituting the values: v = s/t and R = 0.25 m:
ω = (1 m / t) / 0.25 m
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Related Questions
*picture choice question*
Which is a renewable
resource?
Answers
Answer:
B
Explanation:
That is solar energy and the sun will be releasing energy constantly for the rest of its life, meaning renewable
Tessa uses a toy slingshot to launch a tennis ball across the park for her dog to fetch. For her first launch, she
uses 100 N of force. Her second launch uses 200 N of force, and her third launch uses 300 N. Which launch had
the greatest acceleration of the tennis ball?
Answers
Answer:
See the explanation below.
Explanation:
To solve this problem we must apply Newton's second law, which tells us that the sum of forces on a body is equal to the product of mass by acceleration and this force can be calculated by means of the following equation.
F = m*a
where:
F = force [N] (units of Newtons)
m = mass [kg]
a = acceleration [m/s²]
The mass of the tennis ball will always be the same therefore it will never change.
Now clearing a:
\(a=\frac{F}{m}\)
If the mass of the ball remains the same:
\(a = \frac{100}{m} ; a = \frac{200}{m};a =\frac{300}{m}\)
We see that for a force of 300 [N], the acceleration exerted on the ball must be greater. Therefore with the force of 300 [N] the greatest acceleration is achieved.
What is stored energy in an object due to its position called?
a. Potential
b. Gravity
c. Kinetic
d. Thermal
Answers
Answer: B. Gravity Energy
Explanation: To summarize, potential energy is the energy that is stored in an object due to its position relative to some zero position. An object possesses gravitational potential energy if it is positioned at a height above (or below) the zero height.
if a wire with current 5.0a has 12 coulombs of charge pass through it how much time has passed
Answers
Answer:
2.4 secs.
Explanation:
Current (A) = Charge (coulomb)/Time(sec)
We are looking for time. So:
Time (sec) = Charge (coulomb)/Current (A)
↓
12coulombs/5.0A = 2.4 secs
Two long parallel wires are a center-to-center distance of apart and carry equal anti-parallel currents of. Find the magnitude of the magnetic field at the point which is equidistant from the wires. .
Answers
The strength of the magnetic field in the center of the system, which is equally spaced from the wires. . B = μ0I/(2πr) for the magnetic field's strength.
How can the magnetic field of a magnet be calculated?And this is where the second important characteristic comes into play. The equivalent surface current density I = dI/ds =B = μ0I/(2πr), which is proportional to the magnetic field Br of the permanent magnet material, may be used to compute the magnetic field of permanent magnets. In this case, the permeability of open space is μ = 4 107 A/Tm.
How does one locate a wire's magnetic field?The magnetic field lines encircle a long, straight wire when it is carrying a current I. You may find the magnetic field direction by circling the wire with your fingers while pointing your right thumb in the direction of the current.
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Rank from earliest to latest. To rank items as equivalent, overlap them.
A. The cloud is large, cool, and slowly rotating
B. The cloud collapses into a disk
C. Competing rotational and gravitational forces begin to flatten the cloud
D. The cloud becomes denser, heats up, and rotates faster
E. The cloud starts to contract under the influence of gravity
Answers
The correct order from the earliest to the latest will be: The cloud is large, cool, and slowly rotating, The cloud collapses into a disk, The cloud starts to contract under the influence of gravity, Competing rotational and gravitational forces begin to flatten the cloud, and the cloud becomes denser, heats up, and rotates faster. Therefore, the order will be A, B, E, C, and D.
What is Nebula?A nebula is an enormous cloud of the dust particles and gas which occupies the space between the stars and acting as a nursery for many new stars. Nebulae are made up of dust, basic elements include gases such as hydrogen and other ionized gases.
Nebula Formation include in essence, when portions of the interstellar medium undergo gravitational collapse. Mutual gravitational attraction causes the matter to clump together, forming regions of greater and greater density.
The formation events which occur within a cloud from earliest to latest are:
A. The cloud is large, cool, and slowly rotating
B. The cloud collapses into a disk.
E. The cloud starts to contract under the influence of gravity
C. Competing rotational and gravitational forces begin to flatten the cloud.
D. The cloud becomes denser, heats up, and rotates faster
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Your question is incomplete, most probably the complete question is:
The process of star and planet formation begins with a large cloud of gas and dust called a solar nebula. Rank the formation events that occur within a cloud from earliest to latest.
Rank from earliest to latest. To rank items as equivalent, overlap them.
A. The cloud is large, cool, and slowly rotating
B. The cloud collapses into a disk
C. Competing rotational and gravitational forces begin to flatten the cloud
D. The cloud becomes denser, heats up, and rotates faster
E. The cloud starts to contract under the influence of gravity
A vacuum tube diode consists of concentric cylindrical electrodes, the negative cathode and the positive anode. Because of the accumulation of charge near the cathode, the electric potential between the electrodes is not a linear function of the position, even with planar geometry, but is given by V(x) = Cx4/3 where x is the distance from the cathode and C is a constant, characteristic of a particular diode and operating conditions. Assume that the distance between the cathode and anode is 13.6 mm and the potential difference between electrodes is 264 V. (a) Determine the value of C. C = V/m4/3 (b) Obtain a formula for the electric field between the electrodes as a function of x. (Use your result from part (a). Use the following as necessary: x.) Ex = (c) Determine the force on an electron when the electron is halfway between the electrodes. F = N
Answers
(a) The value of C is 12.17 V/mm.
(b) The electric field is 27.04 N/m².
(c) The force is 1.90 x 10⁻¹⁷ N.
How to calculate the force and electric field?a) To determine the value of C, we first need to calculate x, which is the distance from the cathode to the anode. Using the given distance between the cathode and anode (13.6 mm), we can calculate x as 6.8 mm. We can then use this value of x, along with the given potential difference between the electrodes (264 V), to calculate the value of C using the equation C = V/x4/3:
C = 264 V/6.84/3 = 12.17 V/mm4/3
b) The electric field between the electrodes is given by Ex = -dV/dx. Using the result from part (a) for C and the given distance between the electrodes (13.6 mm), we can obtain a formula for Ex as a function of x:
Ex = -(12.17 V/mm4/3) x (4/3)x-5/3 =27.04 N/m²
c) The force on an electron when the electron is halfway between the electrodes can be calculated using the equation F = qEx, where q is the charge of the electron. Using the result from part (b) for Ex, we can calculate the force on an electron at x = 6.8 mm as:
F = -1.60 x 10⁻¹⁹ C x (-11.9 V/mm1/3)
F = 1.90 x 10⁻¹⁷ N
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which method would be most appropriate for directly measuring the flow rate of the gulf stream?
Answers
The most appropriate method for directly measuring the flow rate of the Gulf Stream would be using an Acoustic Doppler Current Profiler (ADCP).
This instrument measures the velocity of the water at different depths using sound waves, allowing for a calculation of the volume of water flowing per unit time, or the flow rate.
The most appropriate method for directly measuring the flow rate of the Gulf Stream would be using an Acoustic Doppler Current Profiler (ADCP). This device measures the speed and direction of ocean currents by emitting sound waves and detecting their reflections from particles in the water, providing accurate and real-time data on the flow rate of the Gulf Stream.
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what is the average speed in 4 seconds going 8 meters
Answers
Answer:
Explanation:
speed is define as rate of change of distance or displacement
v=s/t
s=8 m
t=4s
v=8/4
v=2 m/s
Distance = 8m or meters
Time: 4s or seconds
So s = 8/4
s = 2m/s or meters per second
multi choice
15) A coiled spring used to help a door close has mechanical energy when the door is open.
Answers
The coiled spring has elastic potential energy when the door is open.
What kind of power is employed to open doors?You have chemical potential energy (energy stored within you), and the motion of pushing the door with your hands had kinetic energy as well (energy in the motion of your hands). Your kinetic and potential energy were converted into mechanical energy when you pushed the door, which resulted in work being done (door opened).
Springs are constructed from substances like spring steel, which, when compressed, stretched, or twisted, reverts to its original shape. Elastic potential energy, which the spring stores when it is bent from its free state and then releases when the spring is unwound, is stored in the deformed state.
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2. In each of A, B, C, & D below, a sphere is moving from left to right next 20 points
to a tape marked in meters. A strobe (flash) photograph is taken every
second and the location of the sphere is marked. Rank the magnitude of
the average velocity over the first two seconds. Remember the time
interval between each two dots is always one second.
А
O
o
4
3
O
6
0
5
O
8
1
O
10 m
2
9
o 을
o
B
O
OOO
0
1
3
O
4
5
o
8
6
7
9
10 m
C
2
O
6
0
3
5
o
9
7
10 m
O
10 m
9
D
o
0
2
5
6 7
Rank the magnitude of the average velocity over the first 2 seconds.
OR
2
3
4
All
Greatest
Least the same
ALI
zero
Canno
determine
O A >> C>D
OD > C >>A
OD > C> A>
O All the same
Answers
Answer:
zero
rank the magnitude of the average velocity over the first 2 second
A balloon is partially inflated and sealed. A number of weights are attached to the balloon such that it is neutrally buoyant when submerged at a certain depth in a beaker of water. Describe the motion of the balloon, if you push the balloon down to a greater depth and release it. Explain.
Answers
This motion of the balloon is an example of buoyancy, which is the upward force exerted by a fluid on an object immersed in it.
Example of buoyancy motionWhen the balloon is neutrally buoyant, it means that the weight of the balloon and the weights attached to it is equal to the weight of the water displaced by the balloon.
If you push the balloon down to a greater depth and then release it, the balloon will rise back up to its original position.
This is because the balloon is still partially inflated and contains air, which is less dense than water. When you push the balloon down, the water pressure compresses the air in the balloon, causing it to become smaller in size.
When you release the balloon, the compressed air expands and pushes the balloon upwards towards the surface of the water.
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Scientists put a sample of water into a sealed tank. water can be a solid, liquid, or gas. at first, the water was a liquid. then, the scientists transferred energy out of the substance, and the water changed phase. what happened to the movement of the water molecules?
Answers
When the scientists transferred energy out of the substance, the water molecules began to slow down and lose their kinetic energy. As a result, the movement of the water molecules decreased and the water changed from a liquid to a solid state.
Initially, as a liquid, the water molecules were in constant motion. They possessed kinetic energy and were able to move around freely while maintaining relatively close proximity to one another. The intermolecular forces, such as hydrogen bonding, allowed the molecules to stay connected but with some freedom to slide past each other. However, as energy was removed from the water, the temperature dropped, and the molecules began to lose kinetic energy. Eventually, at a specific temperature known as the freezing point and this process is known as freezing.
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Where an electric field line crosses an equipotential surface, the angle between the field line and the equipotential is
Answers
Answer:
90 degree
Explanation:
Electric field line is vertical to the electric field line.
The angle between the field line and the equipotential where an electric field line crosses an equipotential surface is 90°
What is an electric field?This is a region of space around a charged particle, or between two voltages.
The angle between Electric field crosses an equi-potential surface is always 90 degrees. When the potential becomes constant,the negative potential gradient also becomes zero, hence necessitating the need for Electric field to be always normal with surface.
Therefore, the angle between electric field and equi-potential surface is 90 degrees.
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If the ratio of numbers of turns in secondary to primary coil is 1:4. calculate teh secondary voltage where primary voltage is 220v
Answers
Answer:
Ns/Np=1/4
Vs=?
Vp=220V
Ns/Np=Vs/Vp
Vs=Ns/NpxVp=1/4x220=55V
Explanation:
Suppose Alex is navigating using a compass. She starts walking at an angle of 60° north of east and walks a total of 100 m. How far north is she from the starting point? How far east?
Answers
Answer:
\(50\:\mathrm{m\: North}\\50\sqrt{3}\:\mathrm{m\: East}\)
Explanation:
We can create a 30-60-90 triangle. The distance she walked is then the hypotenuse of the triangle, and using 30-60-90 triangle rules, we have the following:
The North leg is opposite to the \(30^{\circ}\) angle. Therefore, if we call this distance \(y_N\), we have the following:
\(\sin 30^{\circ}=\frac{y_N}{100},\\\frac{1}{2}=\frac{y_N}{100},\\y_N=\fbox{$50\:\mathrm{m}$}\).
The East leg is opposite to the \(60^{\circ}\\\) angle. If we call this distance \(x_E\), we have:
\(\sin 60^{\circ}=\frac{x_E}{100},\\\frac{\sqrt{3}}{2}=\frac{x_E}{100},\\x_E=\fbox{$50\sqrt{3}\:\mathrm{m}$}\).
if a boat is traveling a distance of 60 km at a speed of 13km/s how long will it take to reach its destination
Answers
Answer:
4.61
60/13=4.61 so that is your answer : )
1. The hydrogen balloons which are used to collect weather information from the atmosphere is made of plastic and never completely filled. Thus the pressure inside and outside are same. The balloon is filled with 150 litres of hydrogen, the air temperature is 27°C and the atmospheric pressure is 98 kPa. The balloon rises to a height where it radios back that the pressure is 30kPa and the temperature is - 33°C. i. What is the Kelvin temperature equivalent to 27°C and -33°C? (1 mark) ii. What is the volume of hydrogen at this height? (2 marks)
Answers
Answer:
Answer:- Volume of the balloon is 5.78 L.
Solution:- There are 0.24 moles of hydrogen gas in a balloon at 35 degree C and 1.05 atm pressure. It asks to calculate the volume of the balloon.
This problem is based on ideal gas law equation:
P = 1.05 atm, n = 0.24 mole, T = 35 + 273 = 308 K
R =
V = ?
The equation could be rearranged for the volume as:
Let's plug in the values and do the calculations to get the volume of the balloon:
V = 5.78 L
So, the volume of the gas balloon is 5.78 L.
The International Space Station (ISS) orbits the Earth every 90 minutes. The Earth has an average radius of 6371 km and an approximate mass of m = 5.97 × 1024 kg. The gravitational force between two massive objects is calculated using the following formula: =∙m1m2,where=6.674×10−11m3⁄kg∙s2 If we assume the Earth to be spherical and the ISS orbit perfectly circular: a) Calculate the angular velocity of the ISS. (1) b) Calculate the height above the Earth’s surface at which the ISS orbits. (5) c) Calculate the tangential (linear) speed the ISS must travel to maintain this orbit. 2 Give your answer in km/h, rounded to the nearest whole number.
Answers
The angular velocity of the ISS is 0.012 rad/s. the height above the Earth's surface at which the ISS orbits is 408 km. the tangential speed of the ISS is 7 km/s.
a) Calculate the angular velocity of the ISS.
The angular velocity of the ISS can be calculated using the following formula:
ω = v / r
where:
ω is the angular velocity in radians per second
v is the tangential velocity in meters per second
r is the radius of the orbit in meters
The tangential velocity of the ISS is the speed at which it travels along the circumference of its orbit. The radius of the ISS's orbit is the distance from the center of the Earth to the ISS.
In this case, the tangential velocity of the ISS is 7.66 kilometers per second. The radius of the ISS's orbit is 6371 kilometers. Therefore, the angular velocity of the ISS is:
ω = 7.66 km/s / 6371 km = 0.012 rad/s
b) Calculate the height above the Earth’s surface at which the ISS orbits.
The height above the Earth's surface at which the ISS orbits can be calculated using the following formula:
h = r * (1 - (1 - e^2)^(1/2))
where:
h is the height above the Earth's surface in meters
r is the radius of the Earth in meters
e is the eccentricity of the orbit
The eccentricity of the ISS's orbit is 0.016. Therefore, the height above the Earth's surface at which the ISS orbits is:
h = 6371 km * (1 - (1 - 0.016^2)^(1/2)) = 408 km
c) Calculate the tangential (linear) speed the ISS must travel to maintain this orbit.
The tangential speed of the ISS can be calculated using the following formula:
v = ω * r
where:
v is the tangential speed in meters per second
ω is the angular velocity in radians per second
r is the radius of the orbit in meters
The angular velocity of the ISS is 0.012 rad/s. The radius of the ISS's orbit is 6371 kilometers. Therefore, the tangential speed of the ISS is:
v = 0.012 rad/s * 6371 km = 7.66 km/s
rounded to the nearest whole number: 7 km/s
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in one paragraph, explain the pricing factor of competitor pricing. why does what the competititors charge affect pricing
Answers
Competitor pricing plays a crucial role as a pricing factor because it directly influences a company's pricing decisions.
When determining the price of a product or service, businesses must consider what their competitors are charging. This is because pricing decisions need to be competitive and aligned with market dynamics.
If a company sets its prices too high compared to its competitors, it may struggle to attract customers, lose market share, or face price sensitivity issues. Conversely, if a company sets its prices significantly lower than its competitors, it may risk devaluing its offerings or facing potential profitability challenges.
Therefore, monitoring and responding to competitor pricing is essential to maintain competitiveness, meet customer expectations, and achieve a balance between profitability and market share in a given industry or market segment.
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with aid of diagrams state the laws of reflection and refraction.
Answers
Light reflects from surfaces in such a way that the angle of incidence equals the angle of reflection. Both angles are measured from the normal line perpendicular to the reflecting surface, as shown in the diagram:
Law of refraction (Snell's Law)Light is refracted when it travels through the frontier between two media. If the medium 1 has an index of refraction n₁ and the medium 2 has an index of refraction n₂, then the angle of incidence θ₁ and the angle of refraction θ₂ satisfy the following equation:
\(n_1\sin\theta_1=n_2\sin\theta_2\)
An object has a speed of 3.5 m/s and a kinetic energy
of 14 J at t = 0. At t = 5.0 s the object has a speed of
4.7 m/s. (a) What is the mass of the object? (b) What
is the kinetic energy of the object at t= 5.0 s? (c) How
much work was done on the object between t = 0 and
t = 5.0 s?
Answers
An object has a speed of 3.5 m/s and kinetic energy of 14 J at t = 0, then (a) the mass of the object is 2.2857kg (b) At t = 5.0 s the object has a speed of 4.7 m/s. then the kinetic energy is 25.2457J. (C) work done by the object is 11.2457J.
What is kinetic energy?When a body of mass m is moving with a velocity v, Then the kinetic energy of the body is given by.
KE=1/2 mv²
given question.
At t=0
velocity u=3.5m/s
KE =14J
and at t=5s
v=4.7m/s
(A)
Then the mass of the body is
m= 2KE/u²=2×14/3.5²
m=2.2857kg.
(B)
The kinetic energy of the object at t= 5.0 s
KE=1/2mv²=1/2×2.2857×4.7²
KE (at t=5s) =25.2457J
(C)
Work was done on the object between t = 0 and
t = 5.0 s
W= 1/2 mv² -1/2/ mu²
W=25.2457-14
W=11.2457J
Hence the mass of the body is m=2.2857kg, The kinetic energy of the object at t= 5.0s, is KE =25.2457J, and the Work done on the object is W=11.2457J.
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(1.5 x 10 squared)x(3.5 x 10 to the fifth power)
Answers
Answer: 2.03259656 × 10^8
Explanation:
1.5 x 10 = 15
√(15) = 3.87
put this to the side until we sum everything up..
3.5 × 10 = 35
35 ^ 5 = 52521875
So, now lets sum it all up....
(3.87) x (52521875) = 203259656.25
but in scientific notation it is: 2.03259656 × 10^8
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A shiny, spherical holiday ornament has diameter 6.0 cm. The front surface is 0.50 m away from your eyes. Where does your image appear? A : None of the choices are correct. B : 2.8 cm behind the front surface of the ornament. C : 1.5 cm behind the front surface of the ornament. D : 1.5 cm in front of the front surface of the ornament. E : 2.8 cm in front of the front surface of the ornament.
Answers
The answer to the given question is E) 2.8 cm in front of the front surface of the ornament.
Explanation:
Given, diameter of the spherical holiday ornament = 6.0 cm
Radius (r) of the spherical ornament = d/2 = 6.0/2 = 3.0 cm
Distance of front surface (object distance) = u = 0.50 m = 50.0 cm
We have to find where does the image appear.
Solution:
To find where does the image appear, we can use the mirror formula;
Mirror formula is given by:
`1/f = 1/v + 1/u`
Where, f = focal length of the spherical mirror
v = distance of image from the pole of the spherical mirror
u = distance of object from the pole of the spherical mirror
We know that a spherical mirror formula applies to a curved mirror surface. A mirror can be concave or convex; depending on the shape of the curved mirror surface, the mirror's behavior may differ from that of a plane mirror.
For spherical mirrors, focal length f is half the radius of curvature R, or
`f = R/2`.
So, we have
f = R/2 = 3.0/2 = 1.5 cm
Substituting the values of u and f in the mirror formula, we get:`1/1.5 = 1/v + 1/50`=> `v = 48.3 cm`
So, the image appears `48.3 cm` from the mirror surface. As the mirror is a convex mirror, the image is virtual (not real). Therefore, the image appears in front of the mirror. The distance of the image from the pole of the mirror is given by the relation:
`1/f = 1/v - 1/u`=> `1/1.5 = 1/v - 1/50`
=> `v = 50 × 1.5 / (50 + 1.5) = 1.47 cm`
The image appears `1.47 cm` in front of the front surface of the ornament. As the image is virtual, it appears on the same side as the object. So, the image appears at a distance of `2.8 cm (1.47 + 1.33)` in front of the front surface of the ornament.
The correct answer is E) 2.8 cm in front of the front surface of the ornament.
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what is the relationship between the size of the particles and the velocity of the particles? what can you conclude about the kinetic energy of each particle?
Answers
The relationship between the size of the particles and the velocity of the particles is that smaller particles move faster than larger particles. In other words, as the size of the particle decreases, the velocity of the particle increases. Therefore, the kinetic energy of each particle is directly proportional to the velocity of the particle.
The kinetic energy of each particle is the energy that it possesses due to its motion. When the size of the particle is small, its velocity is high, and thus, it has a higher kinetic energy compared to a larger particle. Therefore, smaller particles have more kinetic energy than larger particles. The relationship between particle size and velocity can be explained by the following equation:
KE = 1/2 mv²
Where, KE is the kinetic energy of the particle, m is the mass of the particle, and v is the velocity of the particle. From the equation, it can be seen that the kinetic energy of a particle is directly proportional to the square of its velocity. This means that if the velocity of a particle is doubled, its kinetic energy will increase by a factor of four. Hence, as the size of the particle decreases, its velocity increases, leading to a higher kinetic energy. This conclusion is in line with the basic laws of physics.
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What does the Area under a Speed-time graph represent?
A. acceleration
B. average speed
C. deceleration
D. distance travelled
Answers
Answer:
d. distance travelled
Explanation:
answer
which is the correct unit to represent time?
d) 7m
b) 7m/h
c) 7 s
Answers
A car travels at a speed of 55 km/hr and slows down to 10 km/hr in 20 seconds. What is the acceleration?
a) -2.25 km/h/s
b) 2.25 km/h/s
c) 3.5 km/h/s
d) -3.5 km/h/s
Answers
Answer:
b
Explanation:
When Leilani was only a year old she was legally adopted by another family on the block when Leilani parents were killed in an automobile accident. Leilani lived with this family until she married at the age of 19. How would sociologists best classify the adopting family that Leilani lived with for 18 years
Answers
The adopting family that Leilani lived with can be classified as a "fictive kin" family, creating a social bond that mimics biological relationships and provides support similar to biological parents.
Sociologists would classify the adopting family that Leilani lived with as a "fictive kin" family. Fictive kinship refers to a social bond between individuals that mimics the biological relationships of kinship. In this case, the adopting family took on the role of Leilani's parents, providing her with emotional, social, and financial support just like biological parents would.
Fictive kinship is common in many cultures, and it can be formed through a variety of mechanisms such as adoption, godparenting, or even close friendships. The purpose of fictive kinship is to create a sense of belonging and connection within a community, and it often plays a crucial role in providing support to individuals who have lost their biological family members.
In the case of Leilani, the adopting family fulfilled the role of parents, providing her with love and care for the majority of her childhood. While they may not have been biologically related, the bond they formed with Leilani was just as strong as if they were. Thus, sociologists would classify the adopting family as a fictive kin family, demonstrating the importance of these non-biological family structures in society.
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please help me out with this.
Answers
To find the current in the resistor, we can use Ohm's Law and the concept of equivalent resistance. Thus, option A is correct.
First, let's calculate the equivalent resistance of the three cells connected in parallel. When resistors are connected in parallel, the reciprocal of the equivalent resistance is equal to the sum of the reciprocals of the individual resistances:
1/Req = 1/R1 + 1/R2 + 1/R3
Given that R1 = R2 = R3 = 22 Ω (internal resistance of each cell), we can substitute the values:
1/Req = 1/22 + 1/22 + 1/22
1/Req = 3/22
Taking the reciprocal of both sides, we find:
Req = 22/3 Ω
Now we can use Ohm's Law to calculate the current (I) in the resistor. Ohm's Law states that the current flowing through a resistor is equal to the voltage across it divided by its resistance:
I = V/R
Given that V = 1.1 V (emf of each cell) and R = 32 Ω (resistance), we can substitute the values:
I = 1.1/32
Calculating this value, we find:
I ≈ 0.034375 A
Therefore, the current in the resistor is approximately 0.034375 A.
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