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Astronauts are playing baseball on the International Space Station. One astronaut with a mass of 50.0 kg, initially at rest, hits a baseball with a bat. The baseball was initially moving toward the astronaut at 35.0 m/s, and after being hit, travels back in the same direction with a speed of 45.0 m/s. The mass of a baseball is 0.14 kg. What is the recoil velocity of the astronaut?
A father pulls his children in a wagon for 25 minutes covering 1.25 miles on a level sidewalk. What is the average horsepower required
A spherical capacitor contains a charge of 3.40nC when connected to a potential difference of 250V. Calculate the electric field just outside the surface of the inner sphere
If the converging lens in a slide projector has a focal length of 104.00 mm and the slide is located 109 mm from the lens, Determine the dimensions of the image of the slide
A hydraulic lift is lifting a car that weighs 13 kN. The area of the piston supporting the car is A, How far must the small piston be pushed down to raise the car a distance of 1.3 cm
A 30-g bullet initially traveling 500 m/s penetrates 12 cm into a wooden block. What average force does it exert on the block
Spaceman Spiff sits just outside the Milky Way galaxy with a cup of liquid Helium which is at approximately 4K (-269 degrees C). what is the latent heat of vaporization of liquid Helium
A block of wood with volume V floats in water with 0.62V submerged. In oil the block floats with 0.86V of its volume submerged. Find the density of the wood
Water at 25 degrees celius is pumped from 100kPa to 5MPa in a pump with an efficiency of 75%, Calulate the temperature rise in the real pump
At t=0, a charged particle at the origin has a velocity v along the positive z-axis. It is in the presence of parallel uniform fields E(along the positve x-axis) and B(along the positive x-axis).
At what angle should the road bank on the curve so that no frictional force is required by a vehicle travelling around the curve at the speed limit.
An apple is dropped from a 25m cliff. At the similar time, a person at the bottom of the cliff fries an arrow up towards the apple. The arrow sticks the apple 0.450 seconds later.
A 2.11 kg mass experiences a gravitational force of 29.7 N at a certain point in space. What is the magnitude of the gravitational field at that point
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