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A cat is being chased by a dog. Both are running in a straight line at constant speeds. The cat has a head start of 3.8 m. The dog is running with a speed of 7.6 m/s and catches the cat after 7.1 s. How fast did the cat run?
A Proton is located at x=2.0 nm, y=0.0 nm and an electron is located at x=0.0nm, y=4.0 nm. Find the attractive Coulombic force between them
The left ventricle of the heart accelerates blood from rest to a velocity of + 20.3 cm/s. How much time does blood take to reach its final velocity
What friction torque is required to reduce angular speed
A rocket with mass 1000kg accelerates upwards at a rate of 20m/s (a) How long does it take before it is going at the speed of sound (334 m/s)? (b) How long does it take before the rocket is at a height of 100km?
When light of wavelength 350 nm falls on a potassium surface, electrons having a maximum kinetic energy of 1.31 eV are emitted. determine the work function of potassium
A massive pulley in the shape of a solid disk is mounted on an axle with negligible friction. What is the mass of the pulley
A 52% efficient device uses chemical energy to generate 570J J of electric energy. How much chemical energy is used
A 0.065-kg tennis ball moving to the right with a speed of 15 m/s is struck by a tennis racket, compute the magnitude of the average force exerted on the ball?
What is the gauge pressure of the air in the tires when its temperature rises to 27 .00C and its volume increases to 1.67 x 10-2 m3? Assume atmospheric pressure is 1.01 x 105 Pa.
The 65.0 kg climber in the figure is supported in the "chimney" by the friction forces exerted on his shoes and back. What is the minimum normal force he must exert
The angular momentum of a flywheel having a rotational inertia of 0.250 kg·m2 about its central axis decreases from 2.80 to 1.800 kg·m2/s in 1.00 s. What is the average power of the flywheel
A tennis player standing 12.6 m from the net hits the ball at 2.79° above the horizontal. how fast was the ball moving when it left the racket
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