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A fox is chasing a bunny. The bunny is initially hopping east at 9 m/s when it first sees the fox. Over the next half second the bunny changes its velocity to west at 10 m/s and escapes. What was the bunny's average acceleration (magnitude and direction) during this half-second interval?
An automobile having a mass of 1,000 kg is driven into a brick wall in a safety test. The bumper behaves like a spring with constant 5.40 106 N/m and is compressed 3.58 cm as the car is brought to rest. What was the speed of the car before impact, as..
Suppose the pear is released from a height of 6 m above Robin's arrow, the arrow is shot at a speed of 30 m/s and the distance between Robin and the base of the tower is 15 m.
An unstable particle with a mass equal to 3.34 multiplied by 10-27 kg is initially at rest. The particle decays into two fragments that fly off with velocities of 0.981c and -0.864c, respectively. Find the masses of the fragments. (Hint: Conserve ..
A laboratory technician drops a 0.0770-kg sample of unknown material, at a temperature of 100.0°C, into a calorimeter. The calorimeter can, initially at 23.0°C, is made of 0.150 kg of copper and contains 0.200 kg of water. The final temperature of th..
Consider a marble falling through a very thick fluid, such as molasses. Draw qualitative plots of the position, velocity, and acceleration as functions of time for the marble, starting from the moment it is released in the molasses.
An ice cube sliding along the ground at 5 m/s goes off a ramp pointed straight up as shown, What is the speed of the ice cube when it comes down, just before it hits the ground
question1as at rest two trains has sirens that release a frequency of 300 hz. the trains travel toward one another and
A 92.7-kg climber is scaling the vertical wall of a mountain. His safety rope is made of a material that, How much is the rope stretched when it breaks his fall and momentarily brings him to rest
What is the power output of the speakers, assuming a uniform, spherical spread of sound?
A parallel plate capacitor with air in the gap between the plates is connected to a 6 volt- battery. What is the dielectric constant of the dielectric
The angular acceleration of a wheel, as a function of time is a = 5.0 t^2 - 8.5 t, where a is in rad/s^2 and t in seconds. If the wheel starts from rest
There is a current of 0.83 A through a lightbulb in a 120 V circuit. What is the resistance of this lightbulb
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