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Air molecules in a warm room (27°C = 300 K) typically have speeds of about 500 m/s (1,100 mph). Why is it that we are unaware of these fast-moving particles continuously colliding with our bodies
A hill that has a 25.7% grade is one that rises 25.7 m, At what angle is such a hill inclined above the horizontal
Two lightbulbs have cylindrical filaments much greater in length than in diameter. The evacuated bulbs are identical except that one operates at a filament temperature of 2 195°C and the other operates at 2 085°C. Find the ratio of the power emitt..
A car is traveling along a road, and its engine is turning over with an angular velocity of +190 rad/s. What would have been the angular displacement if the angular velocity had been equal to its final value of +300 rad/s during the entire 7.0-s in..
The length of a table in the laboratory was measured as 182.36 cm, What is the relative uncertainty of the length, What is the uncertainty of the length
A 1-cm-thick layer of water stands on a horizontal slab of glass. After entering the glass, what is the ray's angle from the normal
300 J of work are done to compress the gas as, in the same process, 1200 J of heat energy are transferred from the gas to the environment. Afterward, what is the rms speed of the molecules.
question1a 6.8 g lead bullet travelling at 520 ms is stopped by a large tree. if half kinetic energy of the bullet is
The speed of electromagnetic waves (which include visible light, radio, and x rays) in vacuum is 3.0 x 108 m/s. Wavelengths of visible light waves range from about 400 nm in the violet to about 700 nm in the red. What are the (a) minimum and (b) m..
A teenager pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency of 12 rpm in 9.5 s. What force is required at the edge
What is the buoyant force on a helium balloon in air if the balloon is spherical with diameter 28.5cm
A thin spherical shell of mass 4.00kg and diameter of 0.200m is filled with Helium(density p= 0.180 kg/ms). It is then released from rest on the bottom of a pool of water that is 4.00m deep.
A 134g baseball moving 28.6 m/s strikes a stationary 5.20 kg brick resting on small rollers so it moves without significant friction. Find the total kinetic energy before the collision
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