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A 90 kg linebacker running downfield at 10 m/s collides with a 65 kg referee who is at rest.
a) What is their final momentum?
b) What is the final velocity of the linebacker-referee system?
c) What is the initial kinetic energy of the linebacker?
d) What is the initial kinetic energy of the referee?
e) Is kinetic energy conserved? f) Is momentum conserved?
An engine draws energy from a hot reservoir with a temperature of 1250 K and exhausts energy into a cold reservoir with a temperature of 355 K. What is the power output of this engine
A soccer ball m = 0.9 kg dropped from a height h = 4.6 m bounces off the grass. Write an expression for how high hf the soccer ball bounces
A golf ball of mass 50 g released from a height 1.5m above a concrete floor bounces back to a height of 1.0 m. What is the amount of energy lost during the impact
An electron is confined in a 2.00nm box. What are it's three lowest energy levels? What wavelength photon would be emitted during an n=3 to n=1 transition
Two small charges with a mass of 1.0 g each are connected by 2.0-cm-long insulating rod of negligible mass. Obtain the moment of inertia around the center of mass
A converging lens witha focal length of 12.0cm forms a virtual image 8.50mm tall, 18.0cm to the right of the lens. Determine the size of the object
A 3.2-kg block is hanging stationary from the end of a vertical spring that is attached to the ceiling. What is the elastic potential energy of the system
A surface encloses the charges q1=3.4uC , q2=7.0uC, and q3=-3.8uC. Find the electric flux through this surface
6 J of work is needed to push an object of mass 2 kg from point A to point B of the frictionless inclined plane, What is the length s of the inclined plane
A 0.57-kg air cart is attached to a spring and allowed to oscillate. Find the maximum force exerted on it by the spring
The primary coil of a transformer has N1= 300 turns, and the secondary coil has N2= 1810 turns. find rms voltage is developed across the secondary coil?
A 100 g cube of ice at 0 degrees C is dropped into 1.3 kg of water that was originally at 82 degrees C. find the final temperature of the water after after the ice melts
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