The 8-kg crank OA, with mass center at G and radius of gyration about O of 0. 22 m, is connected to the 12-kg uniform slender bar AB. A constant counterclockwise torque M is applied to OA so that when OA swings through the vertical position, the speed of B is 8 m/s. Determine the magnitude of the torque M and the angular velocity of OA when it reaches the vertical position
Answers
According to the question the angular velocity of OA when it reaches the vertical position is given by ω.
What is velocity?Velocity is a measure of the rate of change in the position of an object over time. It is a vector quantity, meaning it has both magnitude (or length) and direction. Velocity is the speed of an object in a given direction. It is calculated by dividing the distance traveled by the time taken to travel that distance.
Let ω be the angular velocity of OA when it reaches the vertical position.
The angular momentum of the system about the center of mass G is given by:
\(L_G = I_G \omega + M\)
where \(I_G\) is the moment of inertia of the crank OA about G.
The moment of inertia of the crank OA about G is given by:
\(I_G = m_oa r_o^2 + m_ab l^2\)
where \(m_{oa\) is the mass of the crank OA, l is the length of the uniform slender bar AB, and \(r_o\) is the radius of gyration of the crank OA about O.
The angular momentum of the system about the center of mass G due to the 12-kg uniform slender bar AB is given by:
\(L_G = m_{ab} v l\)
where v is the speed of point B when OA swings through the vertical position.
By equating the two angular momentum equations, we have:
\(m_oa r_o^2 \omega + M = m_{ab} v l\)
Rearranging the above equation, we obtain:
\(M = m_oa r_o^2 \omega + m_ab v l\)
Substituting known values, we get:
\(M = 8 kg \times (0.22 m)^2 \times \omega + 12 kg \times 8 m/s \times 1 m\)
\(M = 1.76 kg m^2/s^2 \omega + 96 kg m/s^2\)
Thus, the magnitude of the torque M is given by:
\(M = 1.76 kg m^2/s^2 \omega + 96 kg m/s^2\)
The angular velocity of OA when it reaches the vertical position is given by:
\(\omega = (M - 96 kg m/s^2) / (1.76 kg m^2/s^2)\)
Substituting the known value for M, we get:
\(\omega = (1.76 kg m^2/s^2 \omega + 96 kg m/s^2 - 96 kg m/s^2) / (1.76 kg m^2/s^2)\\\omega = 1.76 kg m^2/s^2 \omega / 1.76 kg m^2/s^2\\\omega = \omega\)
Hence, the angular velocity of OA when it reaches the vertical position is given by ω.
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Related Questions
In 1993 itleana salvador at italy walked 30 km under 12 min suppose that during 115m at her walk she steadly increased her speed from 42m/s to 5m/s how long does it increase took
Answers
When acceleration is constant, we may connect displacement to time and velocity, two of the other three parameters that describe motion, using the following three equations: d = ( 1 2 ) ( 1 2 ) (v f + v I (t) (Equation 1) D = v I t + a t + 1 2 (Equation 2) V I 2 + 2 a d = v f 2 (Equation 3).
Defining displacement If acceleration is constant, then?Displacement is directly proportional to the square of the length of the linear motion when acceleration is constant and beginning velocity is zero.
Solution:-
vi =+245km/h
aavg = -3.0m/s2
vf =vi -(0.200)vi
vi =(245km/h)(1h/3600s)(103m/1km)= +68.1m/s
vf =(1.000-0.200)vi =(0.800)(68.1m/s)=+54.5m/s
Δt=vf -vi /aavg
= 54.5m/s - 68.1m/s / -3.0m/s2
=-13.6m/s /-3.0 m/s2
= 4.5s
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during the resting phase, what is the electric potential energy of a typical na ion outside of the cel
Answers
During the resting phase, the electric potential energy of a typical Na+ ion outside of the cell is higher than inside the cell.
The resting membrane potential is the difference in electric potential between the inside and outside of a cell when the cell is at rest. This potential difference is maintained by the activity of ion channels and ion pumps in the cell membrane. The resting membrane potential of most cells is negative inside with respect to the outside.
For a typical neuron, the resting potential is around -70 mV, which means that the inside of the cell is negatively charged relative to the outside. This difference in charge creates an electric field that can do work on ions that move across the membrane.
In the case of a Na+ ion, the electric potential energy is higher outside the cell because the outside of the cell is more positively charged relative to the inside. This creates an electrochemical gradient that tends to drive Na+ ions into the cell.
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the motion(s) that occur at the radioulnar joint?
Answers
The radioulnar joint is a synovial joint located at the elbow that connects the radius and the ulna, enabling rotational motion.
The radioulnar joint allows for pronation and supination. Pronation refers to the motion of rotating the forearm so that the palm faces downwards, while supination refers to the motion of rotating the forearm so that the palm faces upwards. The radioulnar joint allows the radius and ulna to move relative to each other, resulting in rotational motion.
When the forearm is pronated, the radius rotates over the ulna and crosses it, while the ulna remains stationary. When the forearm is supinated, the radius rotates back to its original position, and the two bones are parallel to each other.The radioulnar joint is important in many activities, including writing, typing, playing musical instruments, and sports like tennis and golf. Any damage to this joint can result in a loss of pronation and supination, making daily activities challenging.
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Unhappiness with one's physical appearance is a _____ phenomenon.
A. national
B. county
C. city
D. worldwide
Answers
Answer:
worldwide is the answer
describe relative motion with an examples
Answers
Answer:
The measurement of an object's motion with respect to any other object that is moving or stationary is called Relative Motion.
Which object has the most kinetic energy? A 100 kg car going 50 m/s, a 100 kg car going 100 m/s, or a 50 kg car going 50 m/s
Answers
Answer:
The second option. A 100 kg car going 100 m/s has the most kinetic energy.
Explanation:
The formula for kinetic energy is
\(KE=\frac{mv^2}{2}\)
We have 3 situations;
1) \(m=100\) and \(v=50\)
2) \(m=100\) and \(v=100\)
3) \(m=50\) and \(v=50\)
Substitute the values for each situation into the kinetic energy equation.
1) \(KE=\frac{100*50^2}{2}\) \(KE=125000\)
2) \(KE=\frac{100*100^2}{2}\) \(KE=500000\)
3) \(KE=\frac{50*50^2}{2}\) \(KE=62500\)
Situation 2 has the greatest kinetic energy.
Milgram's experiment was trying to find out why people:
Answers
Answer: obey authority figures
Explanation:
Answer: Obey authority figures
Explanation:
1. A soccer ball is kicked horizontally off a cliff with an initial speed of 8 m/s and lands 16 m from the base of
the cliff. What is the height of the cliff?
Answers
Answer:
Height of cliff = S = 20 m (Approx)
Explanation:
Given:
Initial velocity = 8 m/s
Distance s = 16 m
Starting acceleration (a) = 0
Computation:
s = ut + 1/2a(t)²
16 = 8t
t = 2 sec
Height of cliff = S
Gravitational acceleration = 10 m/s
S = 1/2a(t)²
S = 1/2(10)(2)²
Height of cliff = S = 20 m (Approx)
PLS HELP MEH!!!!
Sound travels fastest in
a) air
b) water
c) glass
d) diamond
WILL MARK BRAINLIEST IF ANSWER
Answers
Answer:
hope this helps
Explanation:
Of the three phases of matter (gas, liquid, and solid), sound waves travel the slowest through gases, faster through liquids, and fastest through solids
so your answer would be B.
ngle of a block is 45 degrees. What is the refractive index
Answers
5. Relationships in a community can be cooperative or competitive.
True
False
Answers
Answer:
True
Explanation:
is the correct answer
Answer:
This is True
Explanation:
Communities cooperate by simply co-existing and working together to benefit the community and offering their goods and services. Some programs in a community offer social work, like volunteering and charities, which help people in need in a community.
They can also be competitive because there are lots of the same goods and services offered throughout the city, so businesses have to compete for sales to attract consumers in the communities.
Mark me brainliest pls thank you
The position of a mass oscillating on a spring is given by x=(6.0cm)cos[2πt/(0.58s)]. You may want to review
What is the frequency of this motion?
When is the mass first at the position x=−6.0cm ?
Answers
The frequency of the motion is approximately 1.72 Hz, and the mass is first at the position x = -6.0 cm at approximately 0.29 s.
To determine the frequency of the motion, we can use the formula:
Frequency = 1 / Period
In the given equation, x = (6.0 cm)cos[2πt/(0.58 s)], the coefficient in front of "t" represents the period, not the frequency.
The coefficient 2π in the argument of the cosine function corresponds to one complete cycle of the oscillation. So, to find the period, we can equate the argument to 2π:
2πt/(0.58 s) = 2π
Simplifying the equation:
t/(0.58 s) = 1
t = 0.58 s
Therefore, the period of the motion is 0.58 s.
Now, we can calculate the frequency using the formula:
Frequency = 1 / Period
Frequency = 1 / 0.58 s
Calculating the value:
Frequency ≈ 1.72 Hz
So, the frequency of the motion is approximately 1.72 Hz.
To find when the mass is first at the position x = -6.0 cm, we can equate the given equation to -6.0 cm:
(6.0 cm)cos[2πt/(0.58 s)] = -6.0 cm
Taking the inverse cosine (cos⁻¹) of both sides to solve for t:
2πt/(0.58 s) = cos⁻¹(-6.0 cm / 6.0 cm)
2πt/(0.58 s) = π
Simplifying the equation:
t/(0.58 s) = 1/2
t ≈ 0.29 s
Therefore, the mass is first at the position x = -6.0 cm at approximately 0.29 s.
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The position of a mass oscillating on a spring is given by x=(6.0cm)cos[2πt/(0.58s)]. The frequency of this motion is 5.17 Hz and when the mass first at the position x = -6.0cm is when t = 0.29s.
The position of a mass oscillating on a spring is given by, x = (6.0cm) cos [2πt/(0.58s)]To find the frequency of this motion, we will use the formula; f = 1/T Period T is the time taken by the oscillation to complete one cycle in seconds f = 1/T = 1/(0.58s) = 1.72 Hz .The formula for simple harmonic motion is; x = A cos (ωt)Where A is the amplitude of the oscillation, ω is the angular frequency, and t is the time taken by the oscillation to complete one cycle.
The position of the mass is given as x = - 6 cm. The expression for the position of the mass is; x = (6.0cm) cos [2πt/(0.58s)]Therefore, substituting the given value of the position of the mass in the above equation;-6 cm = 6.0 cos [2πt/(0.58s)]-1 = cos [2πt/(0.58s)].
Therefore, the angle that has a cosine value of -1 is 180°.Thus; 2πt/(0.58s) = π+2nπ; where n = 0, 1, 2, 3...t = [0.29+0.58n] s.
The time taken by the mass to be at the position x = -6.0cm for the first time is when n = 0.t = [0.29+0.58(0)] s= 0.29 s. Therefore, when t = 0.29s the mass is first at the position x=−6.0cm.
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The action spectrum is broader than the absorption spectrum because:_________
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The action spectrum is broader than the absorption spectrum because the action spectrum represents the overall efficiency of photosynthesis, while the absorption spectrum only shows the wavelengths of light absorbed by pigments.
In the action spectrum, a wider range of wavelengths contributes to photosynthesis, as it takes into account the energy conversion process and the involvement of accessory pigments that can absorb different wavelengths and transfer energy to the main photosynthetic pigments.
This results in a broader action spectrum compared to the absorption spectrum.
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help please
4. Explain in detail the effect that interstellar dust has on the light from stars. 5. a) How are emission and reflection nebulae different? b) What is the source of the glow of each? 6. Describe the
Answers
Interstellar dust scatters and absorbs light from stars, causing them to appear redder and dimmer than they would without dust.
Interstellar dust is made up of tiny particles, ranging from a few molecules to a few micrometers in size, that are found throughout the interstellar medium. When light from a star passes through the dust, it can be scattered in many different directions or absorbed by the dust particles.
This causes the starlight to appear dimmer and redder than it would be without dust. The reddening occurs because dust scatters blue light more efficiently than red light, causing blue light to be preferentially absorbed.
The overall effect of interstellar dust is known as extinction, which can make it difficult for astronomers to observe and study distant stars and galaxies.
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A ID travelling wave on a string is described by the equation: y(x,t) = 6 cos(3x + 12t) Where the numbers are in the appropriate SI units. Assume that the positive direction is to the right What is the velocity of the wave?
A) 0.25 mls to the left B) 2 mls to the right C) 3 mls to the right D) 4 mls to the left E) 12 mls to the left
Answers
C) 3 mls to the right. The positive direction is to the right, the velocity of the wave is in the positive direction, which means it is 12 mls to the right.
The equation y(x,t) = 6 cos(3x + 12t) describes an ID travelling wave on a string. The velocity of the wave can be determined by finding the coefficient of t in the argument of the cosine function. In this case, the coefficient of t is 12. Since the positive direction is to the right, the velocity of the wave is in the positive direction, which means it is 12 mls to the right. Therefore, the correct answer is C) 3 mls to the right.
The given equation for the traveling wave is y(x,t) = 6 cos(3x + 12t). To find the wave's velocity, we must identify the wave's angular frequency (ω) and wave number (k) from the equation. In this case, ω = 12 and k = 3. The wave's velocity (v) can be calculated using the formula v = ω/k.
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The diagram shows a circuit with a 3-cell battery, a light bulb, and four labeled locations. Which statement describes the direction of conventional current in this circuit?
Answers
The statement that correctly describes the direction of conventional current in the circuit is : ( C ) current is directed from A to B to C to D
Conventional currentconventioanl current is simply the flow of protons from the positive terminal of the voltage source ( battery ) to the negative terminal of the battery. Also conventional current is the charge transferred in a given direction per unit time. for a conventional current the charge carrier is irrelevant.
Hence we can conclude that the direction of conventional current in the circuit is : current is directed from A to B to C to D.
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Attached below is the missing part of the question
PLEASE DO THIS FOR ME Use the words in the table to fill in the blanks. the answers underlined and bolded are already answered.
Answers
Note that the sentences with the blank spaces are completed as follows;
A "formula" tells what elements make up a compound and the ratios of the atoms of those elements.A compound that is composed of only two elements is a "binary compound".An atom with a negative charge is an "anion".A metal and non-metal tend to form an "ionic" bond.A "bond" is formed when atoms gain, lose, or share electrons.Two non-metal atoms tend to form a "covalent" bond. A "bond" is formed when atoms gain, lose, or share electrons.An "ionic" ion forms when a compound contains both an ionic bond and a covalent bond."Periods" on the periodic table are the rows of elements, and have the same number of valence electrons."Groups" or "families" on the periodic table are the columns of elements and have similar properties.The electrons in the outermost shell of an atom are known as the "valence" electrons and are responsible for the element's chemical activity.What is a periodic table?The periodic table, commonly known as the periodic table of elements, is an arrangement of chemical elements in rows and columns. It is frequently utilized in chemistry, physics, and other disciplines, and is widely regarded as a chemical icon. Because of the arrangement of the elements, it is known as the periodic table.
The periodic table is important because it is arranged to give a wealth of information on elements and their relationships to one another in a single reference.
The table may be used to forecast the characteristics of all elements, even those yet to be found.
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PLEASE HELP❤️❤️❤️❤️
1. A spring extends by 20 cm when a force of 2 N is applied. What is the value of the spring constant in N/m?
2. A spring extends by 5 cm when a force of 20 N is applied to it. What force would be needed to extend the
spring by 10 cm?
Answers
Answer:
1. 10 N/m
2. 40 N
Explanation:
1. Determination of the spring constant.
We'll begin by converting 20 cm to m. This can be obtained as follow:
100 cm = 1 m
Therefore,
20 cm = 20 cm × 1 m / 100 cm
20 cm = 0.2 m
Finally, we shall determine the spring constant. This can be obtained as follow:
Extention (e) = 0.2 m
Force (F) = 2 N
Spring constant (K) =?
F = Ke
2 = K × 0.2
Divide both side by 0.2
K = 2/0.2
K = 10 N/m
Thus, the spring constant is 10 N/m
2. Determination of the force.
Initial extention (e₁) = 5 cm
Initial force (F₁) = 20 N
Final extension (e₂) = 10 cm
Final force (F₂) =?
F = Ke
Divide both side by e
K = F /e
Therefore,
F₁ /e₁ = F₂/e₂
20/5 = F₂/10
4 = F₂/10
Cross multiply
F₂ = 4 × 10
F₂ = 40 N
Thus, a force of 40 N is needed to stretch the spring by 10 cm.
Select the correct answer. Which of these four atoms has the most neutrons?
A. A
B. B
C. C
D. D
Answers
D. 36 in Kr
Let's analyze all the elements in Option
A. Se, Selenium is an element of the Oxygen family which have a mass of 78.96 with 34 electrons.B. Br, Bromine is an element a Halogen which a mass of 79.9 with electrons 35.C. Ge, Germanium a semiconductor that has a mass of 72.64 and 32 electrons.D. Kr, Krypton, is an inert gas that has a mass of 83.79 and 36 electrons.By looking at all the given options we can clearly see that Krypton has the highest number of electrons as compared to the given options so It is the answer. Also with the highest mass, in the given four options.
It can be easily seen in options as the Number of electrons and mass is already written in options.
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identify a star that is white in color
a. canopus b. betelgeuse c. deneb d. aldebaran
Answers
Answer:
(option a)
Explanation:
The star that is white in color is Canopus. Betelgeuse is a red supergiant, Deneb is a blue-white supergiant, and Aldebaran is an orange giant.
Answer:
A. Canopus
Explanation:
Canopus is a first-magnitude star in the constellation Carina: the second brightest star in the heavens.
Which star is brighter, Sirius or Canopus, and why?From Earth Sirius appears to be about twice as bright as Canopus. However, Sirius is only 8.6 lightyears from us, but Canopus is 310 lightyears away. Since light dims by the square of the distance we can say that if they were of equal apparent brightness Canopus would be (310/8.6)^2 or 1,300 time brighter.
In actuality, Sirius is 25.4 times as luminous as the sun, while Canopus is 10,700 times more luminous. So Canopus is 421 times brighter than Sirius. If you are asking why the brighter one looks dimmer, I have answered that.
If you are asking why Canopus is actually so much brighter than Sirius, I will try to answer that now. Stars are powered by atomic reactions that go on in or near the core. These reactions are caused by extreme heat and pressure. These are caused by the weight of the star crushing down from above. The larger the star the greater the heat and pressure, the faster the star burns its fuel, and the brighter it is. Sirius is just a bit over twice the mass of the sun (2.063), but Canopus is between 8 and 10 times as hefty as the sun.
Stars use the heat and pressure in the core to turn hydrogen into helium, which results in light. When it runs out of hydrogen the star starts to collapse. That generates more pressure and heat and allows the star to turn helium into carbon. This makes the star swell up and its surface temperature cools. The larger the star is cooler, but it has many times the surface area to generate light. Canopus is now burning helium and has swollen, but its surface temperature is still 3/4 that of Sirius. Sirius is only 1.7 times the width of the sun, but Canopus is 71 times bigger or 1,750 times the surface area.
If you did not catch all of that, I’ll sum it up. Canopus is more massive, and has a MUCH bigger size than Sirius. This allows it to produce a lot of light on its MUCH larger surface area and to radiate it out into space.
Express 48 m/s in terms of
1.km/h
2.m/min
3.km/s
4.km/minutes
Answers
48 m/s in terms of km/h is 720.8 km/h. In terms of m/min is 2880 m/min, in terms of km/s is 0.048 km/s and in terms of km/min is 2.88 km/min.
To solve this question, we need to understand some terms. The unit of velocity is measured in m/s. It can be expressed in different units of velocity.
1 km (kilometer) = 1000 meter
1 h (hour) = 3600 seconds
1 minutes = 60 seconds
To convert m/s into km/h,
48 m/s * 3600/1000 = 172.8 km/h
To convert m/s into m/min,
48 m/s * 60 = 2880 m/min
To convert m/s into km/s,
48 m/s ÷ 1000 = 0.048 km/s
To convert m/s into km/minutes,
48 m/s * 60 / 1000 = 2.88 km/min
Therefore, the 48 m/s expressed is 172.8 km/h, 2880 m/min, 0.048 km/s and 2.88 km/min.
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48 m/s is equivalent to 172.8 km/h, 2880 m/min, 0.048 km/s, and 2.88 km/minute.
To express 48 m/s in different units of velocity:
km/h (kilometers per hour):
To convert m/s to km/h, we can use the conversion factor of 3.6 since 1 m/s is equal to 3.6 km/h.
48 m/s * (3.6 km/h / 1 m/s) = 172.8 km/h
Therefore, 48 m/s is equivalent to 172.8 km/h.
m/min (meters per minute):
To convert m/s to m/min, we can use the conversion factor of 60 since there are 60 seconds in a minute.
48 m/s * (60 m/min / 1 s) = 2880 m/min
Therefore, 48 m/s is equivalent to 2880 m/min.
km/s (kilometers per second):
Since 1 kilometer is equal to 1000 meters, to convert m/s to km/s, we divide the value by 1000.
48 m/s / 1000 = 0.048 km/s
Therefore, 48 m/s is equivalent to 0.048 km/s.
km/minute (kilometers per minute):
To convert m/s to km/minute, we first need to convert m/s to km/s (as calculated in the previous step) and then multiply by 60 to convert seconds to minutes.
0.048 km/s * 60 = 2.88 km/minute
So, 48 m/s is equivalent to 2.88 km/minute.
Hence, 48 m/s is equivalent to approximately 172.8 km/h, 2880 m/min, 0.048 km/s, and 2.88 km/minute.
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which wave property measures how many waves pass a point in one second?
Answers
Answer:
frequency im pretty sure
Wavelength is also measured in metres ( ) - it is a length after all. The frequency ( ) of a wave is the number of waves passing a point in a certain time. We normally use a time of one second, so this gives frequency the unit hertz ( ), since one hertz is equal to one wave per second
7) Find F1 and F2
HELP PLEASEEE
Answers
The force F1 is equal and opposite to the downward force thus, F1 is equal to 60 N. The force F2 is inclined to 30 ° from leftward force and it is equal to 38.97 N in magnitude.
What is force?Force is an external agent acting on a body to deform it or to change its state of motion or rest. Force is a vector quantity and it is characterised by its magnitude and direction.
If two forces acting on a body from the same directions, then the net force will be the sum of these two forces. If they are acting from opposite directions, they will cancel each other in magnitude.
The force F1 is equal and opposite to the force acting downward. Thus its magnitude is 60 N. The force F2 is inclined to 30 ° from horizontal direction.
F2 = 45 cos 30 = 38.9 N.
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1. A 42 kg parachutist lands moving straight downward with a speed of 3.85 m/s. a. Is the parachutist comes to rest with constant acceleration over a distance of 0.750 m, what force does the ground exert on her
Answers
The force does the ground exert on her when a 42 kg parachutist lands moving straight downward with a speed of 3.85 m/s is 415.03N
Given the mass of parachutist (m) = 42kg
speed of parachute (v) = 3.85m/s
distance the parachutist covers (s) = 0.750m
Finally the parachutist comes to rest the final velocity = 0m/s
constant acceleration is maintained.
We know from newtons law of motion F = ma
Here v^2 - u^2 = 2as. So we can find acceleration as:
a = -u^2/2s = -3.85 x 3.85/ 2x 0.750 = -9.88m/s^2
The force exerted (F) = 42 x -9.88 = -415.03N
Hence force does the ground exert on her is 415.03N.
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The force does the ground exert on her when a 42 kg parachutist lands moving straight downward with a speed of 3.85 m/s is 415.03N
Describe force.An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude. The application of force is the location at which force is applied, and the direction in which the force is applied is known as the direction of the force.
A spring balance can be used to calculate the Force. Newton is the SI unit of force (N).
Given the mass of parachutist (m) = 42kg
speed of parachute (v) = 3.85m/s
distance the parachutist covers (s) = 0.750m
Finally the parachutist comes to rest the final velocity = 0m/s
constant acceleration is maintained.
We know from newtons law of motion F = ma
Here v^2 - u^2 = 2as. So we can find acceleration as:
a = -u^2/2s = -3.85 x 3.85/ 2x 0.750 = -9.88m/s^2
The force exerted (F) = 42 x -9.88 = -415.03N
Hence force does the ground exert on her is 415.03N.
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What is the decay constant for Oxygen-19 if it has a half-life of 26.5s?
A)0.0262/s
B)18.4
C)0.0377/s
C)38.2/s
Answers
Answer:
Option A.
Explanation:
We define the half time T as the time such that an initial quantity A reduces to its half.
So we can model the quantity as a function of time like:
P(t) = A*e^(-k*t)
Then for the half time, T, we will have:
P(T) = A/2 = A*e^(-k*T)
solving for k, we get:
A/2 = A*e^(-k*T)
1/2 = e^(-k*T)
ln(1/2) = ln( e^(-k*T)) = -k*T
-ln(1/2)/T = k
Here we know that the half time is T = 26.5s
if we input that in the above equation, we get:
-ln(1/2)/26.5s = k = 0.0262 s^-1
Then the correct option is A
What is electric force?
-The force that happens between two charged particles.
-The force that happens when one particle is larger than the other.
-The force that happens when two particles are in a similar type of motion,
-The force that happens between two particles with mass.
Answers
Answer:
The force that happens between two particles with mass
a running back with a mass of 70 kg and a speed of 9 m/s collides with, and is held by, a 105-kg defensive tackle going in the opposite direction. how fast must the tackle be going before the collision for their speed afterward to be zero?
Answers
If a running back with a mass of 70 kg and a speed of 9 m/s collides , then speed of tackle before the collision is 6 m/s .
Let the speed of the defensive tackle before the collision be = v .
The momentum of the system before the collision is given by the momentum of the running back,
⇒ that is ; 70 × 9 = 630 Kgm/s , and
the momentum of the tackle is , (-105 kg) × (v m/s) ;
After the collision, the momentum of the system must be zero, so the momentum before the collision must equal the momentum after the collision ;
⇒ (70 × 9) + (-105 × v) = 0 ;
Solving for v, we get ;
⇒ v = 630/105 = 6 m/s
Therefore , the defensive tackle must be going 6 m/s in the opposite direction before the collision for the two players to come to a stop after the collision.
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How Negative Points Works
btw help me with this
How much does the sky weigh?
Answers
Answer:
it weighs 237469812734t7162341873498273417234321476281736481273648123764812736481723648273648137468127364872364 million pounds :)
Explanation:
Answer:
This is a dumb question.
Explanation:
The 'sky' does not weigh anything.
What if we minned astroids
Answers
najah, a management researcher, conducted an experiment with the goal of confirming or contradicting the behavioral leadership approach. najah spent many days following managers around while they worked. like the ohio state university and university of michigan studies, najah’s data showed that most managers focus on
Answers
Based on the information that is depicted from the question, the data from Najah showed that most managers focus on consideration and inspiration.
The behavioral leadership theory simply focuses on how leaders behave. The theory also assumes that other leaders copy each other's traits.
Based on the complete information, the data illustrated that most managers focus on consideration and inspiration. Managers inspire their subordinates in order to accomplish a goal.
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