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A rubber ball is attached to a string and whirled around in a circle. If the string is 1.5 m long (measured from the center of the ball to the far end of the string) and the ball's speed is 12 m/s, what is the ball's centripetal acceleration? The mass of the ball is 0.2 kg. What force is acting on this ball as it is whirled in a circle?
A liquid (ρ = 1.65 g/cm3) flows through twohorizontal sections of tubing joined end to end. Calculate the smaller section's pressure
A space traveller has landed on the sruface of an unknown planet. He drops a small lead all from the top of his space ship and finds that is takes 3 seconds to reach the ground, 18m below. if the weight of the astronaut is 710N on earth, how much wil..
Suppose you want to observe neutron diffraction in a crystal with 0.24nm spacing between lattice planes. Find the kinetic energy of neutrons having wavelength equal to this spacing
a spherical gaussian surface is drawn inside a spherical object as shown. upon inspection no net charge exists within
A disk and a sphere are released simultaneously at the top of an inclined plane. They roll down without slipping. Which will reach the bottom first
An operating gearbox (transmission) has 200. hp at its input shaft while 190. hp are delivered to the output shaft. Determine the rate of entropy production by the gearbox
According to the Youth Risk Behavior Surveillance 2001 survey by the Centers for Disease Control and Prevention, 33.4% of the 9th-grade girls and 35.9% of the 12th-grade girls considered themselves overweight. Assume that these percentages are bas..
Two spaceships approach Mars from the same direction. One has a speed of 0.2c, What is the speed of one spaceship relative to the other
A 8 kilogram block of ice, released from rest at the top of a 1.50 meter long frictionless ramp, Find what would be the speed of the ice at the bottom
An astronaut at rest on Earth has a heartbeat rate of 70 beats/min. When the astronaut is traveling in a spaceship at 0.87c, what will this rate be as measured by the following. An observer also in the ship
Two resistors when connected in series to a 110 line use one-fourth the power that is used when they are connected in parallel. calculate what is the resistance of the other
A monatomic ideal gas at 1.65 atm and an initial temperature of25.0 °C undergoes a slow expansion at constant pressure from a volume of 2.25x10-3 m3 to 3.25x10-3 m3. Find the work done on the gas by the surrounding environment.
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