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The rock weighs 100-lb and is lifted 1ft by thelever.
(a) How much work is done?
(b) The other end of the lever is pushed down 3ft whilelifting the rock. What force had to act on that end?
A satellite is circling a small planet at a speed of 3.60 rev/day. If the satellite's orbit has a diameter of 30,000 km, how fast is the satellite moving
A block of mass 10 kg lies to the left of a 5 kg block. The 10 kg block is pushed with a force of 30 Newtons at an angle of 30 degrees South of East. Determine the net acceleration of the system
A moving particle encounters an external electric field that decreases its kinetic energy from 8560 eV to 7750 eV as the particle moves from position A to position B. Determine the charge of the particle
find the vertical component of a baseball's velocity if the ball is thrown at a 28m/sec at an angle of 37 degrees with the horizontal.
A point source of light is 70.0 cm below the surface of a body of water. Find the diameter of the circle at the surface through which light emerges from the water.
A 2 ?C negative charge is attracted to a large, well-anchored, positive charge. How much kinetic energy does the negatively charged object gain
Air at 1 ATM & 80 °C is fed to a chiller. The air contains water vapour at 15 degrees of superheat. The air stream is chilled to condense 50% of the water in the feed. At what temperature must the chiller operate if the product streams are also at..
A storage tank 27 m high is filled with pure water, Calculate the magnitude of the net force that acts on a square access hatch at the bottom of the tank that measures 0.6 m by 0.6 m
An injured monkey sits perched on a tree branch 3.0 m above the ground, what is minimum speed the tranquilizer dart must leave the gun to still hit the monkey
An electric kettle of 7.0 Ω resistance containing 500 cm3 of water at 10ºC is connected to the 110 V supply. calculate how long it takes to convert all of the water into steam
A fugitive tries to hop on a freight train traveling at a constant speed of 4.8. What is the distance traveled to reach the box car
A simple harmonic oscillator with m=0.815 kg and total energy E=135 J has amplitude 1.35m, Find the maximum acceleration
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