Answers
Given the velocity-time graph of an object.
The slope of a velocity-time graph gives the acceleration of the object.
From the graph, we can see that the slope of the object is not zero. Hence there is an acceleration acting on the object.
From Newton's second law, the net force acting on an object is given by the product of the mass of the object and the acceleration acting on it.
Therefore, as the object has a net acceleration there is a net force acting on the object. Therefore the force is unbalanced.
We can see that the slope of the graph is increasing with time. Therefore the acceleration of the object and hence the force acting on the object is increasing over time.
Therefore the correct answer is option C.
Related Questions
a cylindrical capacitor has an inner conductor of radius 2.6 mmmm and an outer conductor of radius 4.0 mmmm. the two conductors are separated by vacuum, and the entire capacitor is 2.1 mm long.
Answers
The capacitance per unit is 1.292 X 10⁻¹⁰.
The radius of inner part of the conductor = r = 2.6 X 10⁻³ m
The radius of outer part of the conductor = R = 4 X 10⁻³ m
Length of the capacitor = l = 2.1 X 10⁻³ m
Capacitance is purely geometrical property. It depends only on length, radius of conductor.
From the formula of cylindrical capacitor,
= C = (2πεl) / ln(R/r)
where ε = 8.85 X 10⁻¹²
But we need capacitance per unit length so,
= C/l = (2πε) / ln(R/r)
= C/l = (2 X 3.14 X 8.85 X 10⁻¹²) / ln ( 4 X 10⁻³ / 2.6 X 10⁻³)
= C/l = 55.58 X 10⁻¹² / 0.43
= C/l = 1.292 X 10⁻¹⁰
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Which of the following are electromagnetic waves?a. Water wavesb. Radio wavesc. Sound wavesd. Seismic waves
Answers
Answer:
Radio waves
Explanation:
Radio wavs are electromagnetic waves.
Hope this helped!
One of the primary goals of the Kepler space telescope is to search for Earth-like planets. Data gathered by the telescope indicates the existence of one such planet named Boralis orbiting a star 115 ly from our solar system. Consider an interstellar spaceship leaving Earth to travel to Boralis. The ship can reach 0.96c almost instantly and can also decelerate almost instantly. The ship is 159 m long in its reference frame.(a)What is the length of the moving ship (in m) as measured by observers on Earth
Answers
Answer:
44.52m
Explanation:
d = 115 ly
The ship travels at a Velocity, v = 0.96c
The ship is = 159m long
To calculate this we use the formula for length contraction
L = Lo/γ
We have γ = 1/√1-v²/c²
L = Lo√1-(0.96c)²/c²
= 159 x √1-0.9216
= 159 x √0.0784
= 159 x 0.28
= 44.52m is the length of the ship as measured by the observers on earth.
A helicopter (mass = 5000 kg) lifts 1475 kg of stuff (two people and packages). Let’s say initially the helicopter is hovering (v = 0 m/s). What thrust (force) is necessary for the helicopter to hover?
Answers
While it's carrying the passengers and packages, its total mass is 5000 kg + 1475 kg = 6475 kg, so that its weight is
(6475 kg) g = 63,455 N
In order to hover, the helicopter's thrust should match this weight.
An 8.0 Kg mass is placed at = 3 where should a 10 Kg mass be placed along the − so that the center of mass will be located ay = 4.5?
Answers
Answer:
Therefore, the 10 kg mass should be placed at x = 5.7 m along the x-axis to achieve a center of mass located at y = 4.5 m.
Explanation:
To find the position along the x-axis where a 10 kg mass should be placed such that the center of mass is located at y = 4.5, we can use the formula for the center of mass:
x_cm = (m1 * x1 + m2 * x2) / (m1 + m2)
Here, m1 and x1 represent the mass and position of the 8 kg mass, respectively. m2 is the mass of the 10 kg mass, and we need to find x2, its position.
Given:
m1 = 8 kg
x1 = 3 m
x_cm = unknown (to be found)
m2 = 10 kg
y_cm = 4.5 m
Since the center of mass is at y = 4.5, we only need to consider the y-coordinate when calculating the center of mass position along the x-axis.
To solve for x2, we can rearrange the formula as follows:
x2 = (x_cm * (m1 + m2) - m1 * x1) / m2
Substituting the given values:
x2 = (x_cm * (8 kg + 10 kg) - 8 kg * 3 m) / 10 kg
Simplifying:
x2 = (x_cm * 18 kg - 24 kg*m) / 10 kg
Now, we can set the y-coordinate of the center of mass equal to 4.5 m and solve for x_cm:
4.5 m = (8 kg * 3 m + 10 kg * x2) / (8 kg + 10 kg)
Simplifying:
4.5 m = (24 kg + 10 kg * x2) / 18 kg
Multiplying both sides by 18 kg:
81 kg*m = 24 kg + 10 kg * x2
Subtracting 24 kg from both sides:
10 kg * x2 = 81 kg*m - 24 kg
Dividing both sides by 10 kg:
x2 = (81 kg*m - 24 kg) / 10 kg
Simplifying:
x2 = 8.1 m - 2.4 m
x2 = 5.7 m
(brainlest?) ples:(
Answer:
the 10 kg mass should be placed at x = -2.4 m to achieve a center of mass at y = 4.5 m.
Explanation:
To find the position along the x-axis where the 10 kg mass should be placed so that the center of mass is located at y = 4.5, we can use the principle of the center of mass.
The center of mass of a system is given by the equation:
x_cm = (m1x1 + m2x2) / (m1 + m2),
where x_cm is the x-coordinate of the center of mass, m1 and m2 are the masses, and x1 and x2 are the positions along the x-axis.
Given:
m1 = 8 kg,
x1 = 3 m,
m2 = 10 kg,
y_cm = 4.5 m.
To solve for x2, we need to find the x-coordinate of the center of mass (x_cm) by using the y-coordinate:
y_cm = (m1y1 + m2y2) / (m1 + m2),
where y1 and y2 are the positions along the y-axis.
Rearranging the equation and substituting the given values:
4.5 = (83 + 10y2) / (8 + 10).
Simplifying the equation:
4.5 = (24 + 10*y2) / 18.
Multiplying both sides by 18:
81 = 24 + 10*y2.
Rearranging the equation:
10*y2 = 81 - 24,
10*y2 = 57.
Dividing both sides by 10:
y2 = 5.7.
Therefore, the y-coordinate of the 10 kg mass should be 5.7 m.
To find the x-coordinate of the 10 kg mass, we can use the equation for the center of mass:
x_cm = (m1x1 + m2x2) / (m1 + m2).
Substituting the given values:
x_cm = (83 + 10x2) / (8 + 10).
Since the center of mass is at x_cm = 0 (the origin), we can solve for x2:
0 = (83 + 10x2) / (8 + 10).
Rearranging the equation:
83 + 10x2 = 0.
24 + 10*x2 = 0.
10*x2 = -24.
Dividing both sides by 10:
x2 = -2.4.
In the sport of billiards, event organizers often remove one of the rails on a pool table to allow players to measure the speed of their break shots (the opening shot of a game in which the player strikes a ball with his pool cue).
The top of a pool table is a height ℎ=2.75 ft from the floor. If a player's ball lands a distance =16.50 ft from the table edge, what is her break shot speed 0?
Answers
The break shot speed of the player is determined as 96.5 ft/s.
Time of motion of the playeruse the following kinematic equation to determine the time of motion of the player.
h = vt + ¹/₂gt²
h = 0 + ¹/₂gt²
h = ¹/₂gt²
t = √(2h/g)
t = √(2 x 2.75/32.17)
t = 0.171 s
break shot speedvx = x/t
vx = 16.5 ft / 0.171 s
vx = 96.5 ft/s
Thus, the break shot speed of the player is determined as 96.5 ft/s.
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What is a therapuetic modality in psychology?
Answers
Answer:
There are several modalities, or methods, of treatment: individual therapy, group therapy, couples therapy, and family therapy
Explanation:
Answer:
Modalities are therapeutic tools that we use to help our patients recover from surgery, injury or a condition that causes pain and dysfunction, so they can get back to the activities they enjoy.
how many males are color blind one in 50 1 and 10 one hundred one and 12
Answers
One in twelve males have color blindness whereas One in two-hundred females have color blindness. Thus, Option D is correct.
Color blindness is the ability to distinguish different colors. It is hard to differentiate the colors between the same color family. A person with color blindness can not able to see red and green, and can able to see grey, black, and white. It is often inherited.
A person with color blindness can not able to differentiate the colors between red and green. There are three types of color blindness they are Deuteranomaly (difficulty with red-green color blindness and it makes green look redder), Protanomaly(red look greener), Protanopia, and deuteranopia (difficulty in identifying red and green). It is cured by using proper contact lenses.
Thus, One in twelve males has color blindness. Hence, the ideal solution is option D.
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Two football players collide head-on in midair while chasing a pass. The first player has a 110 kg mass and an initial velocity of 4.40 m/s in the positive x direction, while the second player has a 135 kg mass and initial velocity of 3.30 m/s in the negative x direction.
Required:
What is the x component of their velocity just after impact if they cling together?
Answers
Answer:
v = 0.16 m/s in the positive x direction.
Explanation:
Assuming no external forces acting during the collision, total momentum must be conserved.Initial momentum can be expressed as follows:\(p_{o} =m_{1} * v_{o1} + m_{2} * v_{o2} (1)\)
Since both players move only horizontally, (1) can be expressed in terms of the velocities in the x- directions only, taking into account that player 1 moves in the positive x-direction, and player 2 in the opposite direction, and assuming that positive velocities are in the positive x-direction also:\(p_{o} =110 kg * 4.4 m/s + 135 kg * (-3.3 m/s) (2)\)
Since total momentum must be conserved, the final momentum must be equal to the initial one.We know that both players cling together after colliding, so the collision is totally inelastic.So, the final momentum can be expressed as follows:\(p_{f} =( m_{1} + m_{2} )* v_{f} (3)\)
Replacing by the givens in (3), we get:\(p_{f} =( m_{1} + m_{2} )* v_{f} = (110 kg + 135 kg)* vf (4)\)
Since (3) must be equal to (4) we can solve for vf, as follows:\(v_{f} = \frac {110 kg * 4.4 m/s + 135 kg * (-3.3 m/s) }{(110 kg + 135 kg)} = 0.16 m/s (5)\)
Since the initial momentum has only component in the x-direction, the final one must have component in the x-direction only too.This means that vf is in the x-direction, and due to it is positive, it must aim in the positive x-direction.So, vfx = +0.16 m/sHow many times can a three-dimensional object that has a radius of 1,000 units fit something with a radius of 10 units inside of it? How many times can something with a radius of 2,000 units fit something with a radius of 1 unit?
Answers
Answer:
# _units = 1000
Explanation:
This exercise we can use a direct proportion rule.
If a volume of radius r = 1 is one unit, how many units can fit in a volume of radius 10?
# _units = V₁₀ / V₁
The volume of a body of radius 1 is
V₁ = 4/3 π r₁³
V₁ = 4/3π
the volume of a body of radius r = 10
V₁₀ = 4/3 π r₂³
V10 = 4/3 π 10³
the number of times this content is
#_units = 4/3 π 1000 / (4/3 π 1)
# _units = 1000
At the start of an experiment, the potential energy of an object was 326 joules and its kinetic energy was 117 joules. At the end of the experiment, the potential energy of the object was 89 joules, and its kinetic energy was 331 joules. What conclusion can be drawn from this experiment?
The total energy of the system increased due to the transfer of energy on a macroscopic scale to energy on a molecular scale.
The mechanical energy of the system increased due to the transfer of energy on a macroscopic scale to energy on a molecular scale.
The mechanical energy of the system decreased due to the transfer of energy on a macroscopic scale to energy on a molecular scale.
The total energy of the system decreased due to the transfer of energy on a macroscopic scale to energy on a molecular scale.
Answers
he mechanical energy of the system decreased due to the transfer of energy on a macroscopic scale to energy on a molecular scale.
Answer:
C. The mechanical energy of the system decreased due to the transfer of energy on a macroscopic scale to energy on a molecular scale.
Explanation:
This answer is right because I just got done with the quick check and I got a 100%.
A .05 kg rubber ball is dropped and hits the floor with an initial velocity of 10 m/s. It rebounds away from the floor with a final speed of 7 m/s after being in contact with the floor for .01 seconds. Find the magnitude of the force exerted by the floor on the rubber ball.
Answers
Answer:the answer is 3
Explanation:
Suppose the posted designated speed for a highway ramp is to be 30 mph and the radius of the curve is 700 ft. At what angle must the curve be banked? No Friction
Answers
Answer:
4.92°
Explanation:
The banking angle θ = tan⁻¹(v²/rg) where v = designated speed of ramp = 30 mph = 30 × 1609 m/3600 s = 13.41 m/s, r = radius of curve = 700 ft = 700 × 0.3048 m = 213.36 m and g = acceleration due to gravity = 9.8 m/s²
Substituting the variables into the equation, we have
θ = tan⁻¹(v²/rg)
= tan⁻¹((13.41 m/s)²/[213.36 m × 9.8 m/s²])
= tan⁻¹((179.8281 m²/s)²/[2090.928 m²/s²])
= tan⁻¹(0.086)
= 4.92°
If the same change in velocity occurs in less time, does the magnitude of the corresponding average acceleration increase, decrease, or stay the
same? Explain
Answers
Answer:
increase
Explanation:
As acceleration is the time rate of change of velocity
a = Δv/t
with t in the denominator, smaller time values result in greater acceleration values with constant velocity change.
A dropped ball gains speed because
its nature is to become closer to Earth,
its velocity changes.
a gravitational force acts on it
Of inertia
Answers
Answer:
3 and 3 and 3
Explanation:
I am sure Hope for brain list
which image shows an example of kinetic energy
Answers
Answer:
Hello there seems to be no Images in this question but Kinetic energy is a push or a pull force which has to do with motion if you just need to know what t is. Next time be sure to add the pictures for it.
Explanation:
Thank you!
Hello the other person (#Sonichj123), was indeed correct there appears to be no picture in your question. Although there is no picture in your question, If you have another question I will be gladly to help you!
Explanation:
Thank you so much! (≥ФωФ≤)
A 4-lb collar can slide without friction along a horizontal rod and is in equilibrium at A when it is pushed 1 in. to the right and released from rest. The springs are undeformed when the collar is at A and the constant of each spring is 2800 lb/in. Determine the maximum velocity of the collar.
Answers
The maximum velocity of the collar is 0.335 m/s.
Maximum velocity of simple harmonic motion
The maximum velocity of a simple harmonic motion occurs when the object is in equilibrium position.
K.E = U
¹/₂mv² = ¹/₂kx²
mv² = kx²
where;
k is spring constant = 2800 lb/in = 316.36 N/mx is extension = 1 in = 0.0254 mm is mass = 4 lb = 1.81 kg\(v = \sqrt{\frac{kx^2}{m} } \\\\v = \sqrt{\frac{316.36 \times 0.0254^2}{1.81} }\\\\v = 0.335 \ m/s\)
Thus, the maximum velocity of the collar is 0.335 m/s.
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what is the most effortless walking speed for a person with 90cm long legs if the length of each step is 90cm
Answers
Answer:
75 cm/second.
Explanation:
Formula:
Walking speed = stride length / time per step
Walking speed = 90cm/time per step
= 90cm/1.2 seconds (a common estimate time per step)
= 75cm/second.
Need some help with some physics work. i dont want overdue homework.
1.which of the following best describes a scalar value?
a. a measurement in more than one dimension that involves a magnitude and direction
b.a measurement in a single dimension that involves more than one number
c. a measurement that easily scales from one dimension to another
d. a measurement in a single dimension that involves only one number.
2.which of the following is an accurate statement about vectors?
a. rotating a vector about an axis passing through the tip of the vector does not change the vector.
b. the magnitude of a vector can be zero even if one of its components is not zero.
c. if two vectors have unequal magnitudes it is possible that their vector sum is zero.
d. it is possible to add a scalar quantity to a vector
e. the magnitude of a vector may be positive even if all of its components are negative.
that all i need. any help is welcome. thanks in advance.
Answers
Answer:
1.) B
2.) E
Explanation:
A scalar quantity is the quantity in which we consider only it magnitude but not its direction.
1.) which of the following best describes a scalar value?
The best option is D and
The best answer is
d. a measurement in a single dimension that involves only one number
Also, Vector quantity is the quantity in which we consider both the magnitude and the direction.
2.) Which of the following is an accurate statement about vectors?
The best option is E
And the best answer is:
the magnitude of a vector may be positive even if all of its components are negative.
For instance, if two vectors are moving in a south and west direction, the resultant vector will still be positive.
What is revolution?
A. The motion of an object along a curved path
B. The spinning of an object on its axis
C. The orbit of a satellite around a central body
D. The motion of two objects around each other
Answers
Answer:
A. the motion of an object along a curved path
a girl of whose mass is 50kg carries a box of mass 20kg high.she take 16s to climb up the steps (take g=10m/s^2). what is her weight?
Answers
Explanation:
\(w = m.g\)
\(m =70 \\ g = 10\)
70x10=700N
PLEASE HELP !!!!!!!!!!
Answers
Answer:
1
Explanation:
What is responsible for keeping an object at rest or maintaining an object's
constant velocity?
Answers
Answer:
Inertia
Explanation:
Inertia is a force which keeps stationary objects at rest and moving objects in motion at constant velocity.
Calculate the ratio of H+ ions to OH– ions at a pH = 8. Find the concentration of H+ ions to OH– ions listed in Table B of your Student Guide. Then divide the H+ concentration by the OH– concentration. Record this calculated ratio in Table A of your Student Guide. Compare your approximated and calculated ratios of H+ ions to OH– ions at a pH = 8. Are they the same? Why or why not? Record your explanation in Table A. What is the concentration of H+ ions at a pH = 8? mol/L What is the concentration of OH– ions at a pH = 8? mol/L What is the ratio of H+ ions to OH– ions at a pH = 8? :1 OR 1:
Answers
At pH = 8, the ratio of H+ ions to OH- ions is 1:1, indicating a neutral solution. The concentration of H+ ions and OH- ions is approximately 1 x 10^(-8) mol/L. The calculated and approximated ratios should match.
To calculate the ratio of H+ ions to OH- ions at pH = 8, we need to use the relationship between pH and the concentration of H+ ions. The pH scale is a logarithmic scale that measures the acidity or alkalinity of a solution based on the concentration of H+ ions.
The formula to calculate the concentration of H+ ions (\(C_H\)+) from pH is:
\(C_H\)+ = \(10^(^-^p^H^)\)
Substituting pH = 8 into the formula:
\(C_H\)+ = \(10^(^-^8^))\)
Using the properties of logarithms, we can calculate the concentration of H+ ions:
\(C_H\)+ ≈ 1 x \(10^(^-^8^))\) mol/L
According to the concept of neutrality in water, the concentration of H+ ions is equal to the concentration of OH- ions. Therefore, the concentration of OH- ions (\(C_O_H\)-) is also approximately 1 x \(10^(^-^8^))\)mol/L.
To calculate the ratio of H+ ions to OH- ions, we divide the concentration of H+ ions by the concentration of OH- ions:
Ratio = \(C_H\)+ / \(C_O_H\)-
Ratio = (1 x \(10^(^-^8^))\) / (1 x \(10^(^-^8^))\))
Ratio = 1:1
The ratio of H+ ions to OH- ions at pH = 8 is 1:1, indicating a neutral solution. This means that the concentration of H+ ions is equal to the concentration of OH- ions, resulting in a balanced ratio.
When comparing the calculated ratio of 1:1 to the approximated ratio at pH = 8, they should be the same because the ratio of H+ ions to OH- ions is determined solely by the pH value, which is consistent and mathematically derived. Therefore, the approximated and calculated ratios should match.
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The efficiency of the power station is 0.38(38%). Its electrical power output is 1.9x10^9 W. Calculate the input to the power station
Answers
The input to the power station is 5x10^9 W. This means that the power station requires an input of 5x10^9 watts to produce an electrical power output of 1.9x10^9 watts with an efficiency of 38%.
The efficiency of a power station is defined as the ratio of its output power to input power. Therefore, we can use the efficiency and the electrical power output of the power station to calculate its input power as follows:
Efficiency = Output power / Input power
Solving for input power, we get:
Input power = Output power / Efficiency
Substituting the given values, we get:
Input power = 1.9x10^9 W / 0.38
Input power = 5x10^9 W (to two significant figures)
The rest of the input power is lost as heat due to inefficiencies in the power generation process.
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Construct a ray diagram to determine the image.
A thin lens is located centered over a 14 cm ruler at the 7 cm mark. A black dot is located at 5.5 cm on the left side of the lens and at 8.5 cm on the right side of the lens. An arrow is located at the 3.0 cm mark.
Where is the image located?
At 8.3 cm on the ruler
At 9.4 cm on the ruler
At 10.7 cm on the ruler
At 11.5 cm on the ruler
Answers
A ray diagram with given information gives an image location of 10.7 cm on the ruler. This method helps determine characteristics of images formed by lenses.
To build a beam graph to decide the picture area, we first need to draw an outline with the given data. We start by defining an upward boundary to address the focal point, with the ruler and the dark spot on one or the other side of it. We then, at that point, draw a bolt on the left half of the focal point at the 3.0 cm mark.
Then, we draw three beams from the bolt. The primary beam is attracted lined up with the important pivot and goes through the point of convergence on the right half of the focal point.
The subsequent beam goes through the focal point of the focal point and go on in an orderly fashion. The third beam goes through the point of convergence on the left half of the focal point and becomes lined up with the essential pivot subsequent to going from the perspective.
Where these three beams cross on the right half of the focal point is the picture area. For this situation, the beams converge at a point situated at 10.7 cm on the ruler, which is the response to the inquiry. Thusly, the picture is situated at 10.7 cm on the ruler.
This strategy for developing a beam graph is a valuable apparatus in deciding the area and qualities of pictures shaped by focal points, and is a significant idea in the investigation of optics.
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Which of the following statements is NOT true of a hypoosmotic solution?
A. It is also known as a hypotonic solution.
B. There are more dissolved solids within the cell than outside the
cell.
C. It may cause water to move into the cell, which will cause it to
swell.
D. It may cause the cell to shrink or crenate.
Answers
Answer:
Good luck on the test, you donuts.
Explanation:
Please help! I'm really desperate.
Could anyone at least give some sketch ideas or advice?
I'm not sure how to set it out..
Answers
Answer:
make a pineapple schematic
Explanation:
A 1500 kg drawbridge, 5.66 m long, is being lifted by a cable attached to its end. The cable exerts a 10800 N force at a 50.0 degree angle. What is the net torque on the drawbridge?
Answers
what is the value of pi(8.104)^2 written with correct significant numbers
Answers
Answer:206.3
Explanation: