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A tennis player tosses a tennis ball straight up and then catches it after 3.40 s at the same height as the point of release. What is the maximum height (in m) the ball reaches?
A gymnast with mass m1 = 49 kg is on the balance beam that sits on (but is not attached to) two supports. The beam has a mass m2 = 126 kg and length L = 5 m. Each support is 1/3 of the way from each end. Initially the gymnast stands at the left en..
A certain single ion channel is selectively permeable to K and has a resistance of 1.15 GOhms. How many K ions travel through the channel during this time
A 100 g aluminum calorimeter contains 250 g of water. The two substances are in thermal equilibrium at 10°C. Two metallic blocks are placed in the water. Determine the specific heat of the unknown second sample
A 3000 kg lunar lander is in orbit 50 km above the surface of the moon. how much work must the thrusters do
On a day when the wind is blowing toward the south at 3 m/s, determine the resultant velocity (speed and direction) of the runner
A soprano saxophone is an open pipe. If all keys are closed, it is approximately 65 cm long. Using 343 m/s as the speed of sound, find the lowest frequency that can be played on the instrument.
A 9.27-m-long glider with a mass of 545.48 kg (including the passengers) is gliding horizontally through the air at 29.02 m/s, What is the glider's horizontal velocity
An ideal heat-engine is to be used in an environment where the ambient temperature is 22.5 °C. What should be the minimum temperature of the hot heat reservoir
a rifle with a mass of 2.8 kg fired a bullet with a mass of 0.003 kg. the bullet moves with a muzzle velocity of 420 m/s after the rifle is fired
A flat horizontal surface with an area of 505 cm2 is inside a uniform electric field of 1.40×104 N/C. What is the electric flux through the surface
Ice has formed on a shallow pond, and a steady state has been reached, with the air above the ice at -4.1°C and the bottom of the pond at 4.0°C. how thick is the ice
If the translation rms speed of the water vapor molecules in air is 703 m/s, what is the translational rms speed of the carbon dioxide molecules in the same air? Both gases are at the same temperature.
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