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At what temperature is the speed of sound in helium (ideal gas, = 1.67, atomic mass = 4.003 u) the same as its speed in oxygen gas at 11.0 oC? The speed of sound in oxygen at 11.0°C is 322 m/s.
He would like a prescription for contact lenses to serve the similar purpose. What is the correct contact lens prescription, in diopters.
Cowboy joe wishes to shoot his assaiat by ricocheting a bullet off a mirrored metal plate. To do so, must he simply aim at the mirrored image of his assaiant? Explain.
suppose that the engineer is at x = 0 when, at t = 0, he first spots the locomotive. Sketch x(t) curves for the locomotive and high-speed train for the cases in which a collision is just avoided and is not quite avoided.
How long is the bridge? Write down an equation for the bridge's height. And how far from the center of the bridge are two points if bridge's height at those points is 80 meters.
A catapult launches a test rocket vertically upward from a well, giving the rocket an initial speed of 81.0 m/s at ground level. The engines then fire.
A 180 g wire is held under a tension of 216 N with one end at x = 0 and the other at x = 15.0 m. At time t = 0, pulse 1 is sent along the wire from the end at x = 15.0 m. At time t = 37.9 ms, pulse 2 is sent along the wire from the end at x = 0. A..
If you now place a pencil under the edge of the mirror nearer the wall, tilting it upward by 5.0, how much higher on the wall is the spot?
A worker pushes horizontally on a large crate with a force of 297 N, and the crate is moved 4.8 m. How much work was done.
When burned, 3.7 tons of coal releases the amount of energy that you use over the course of a year in the form of heat. How many tons of coal are required to provide you with your yearly energy use if you were to get that energy from a coal burnin..
what is the approximate value of the impulse applied to the two-object system due to forces exerted on the system by objects outside the system >> Fnet * delta_t = (vector form)
A charged particle A exerts a force of 2.75 ?N to the right on charged particle B when the particles are 12.0 mm apart. Particle B moves straight away from A to make the distance between them 17.6 mm. What vector force does particle B then exert o..
A space probe is launched from Earth, headed for deep space. At a distance of 15,000 miles from the Earth's center, the gravitational force on it is 800 lb. What is the size of the force when it is at 30,000 miles from the Earth's center?
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