Multiple Choice

An object in motion will cause which of the following?

Select all that apply.

friction

decrease in heat flow

increase in heat flow

creation of energy

If a wheel falls from an airplane that is flying horizontally at an altitude of 500 m, how long will it take for the wheel to strike the ground? 10 s 50 s 80 s 100 s

A light-year is the distance that light can travel in one year. If the sun is 1.5 x 10⁸ km away, how many light years is the sun from earth? Assume that light travels at a speed of 3.0 x 10¹⁰ cm/s.

Most telephone cables are made of copper wire of either 24 or 26 gauge. If the resistance of 24-gauge wire is 137 Ω/mile and the resistance of 26-gauge wire is 220 Ω/mile, what is the ratio of the diameter of 24-gauge wire to that of 26-gauge wire?

2. In order to get a Master's degree a person must have first attended a vocational school earned an Associate's degree received a Bachelor's degree,

The coil of wire in a galvanometer has a resistance of RC = 71.0 Ω. The galvanometer exhibits a full-scale deflection when the current through it is 0.470 mA. A resistor is connected in series with this combination so as to produce a voltmeter.

Which of the following has the greatest momentum? A - Truck with a mass of 2250 kg moving at a velocity of 25m/s B - car with a mass of 121010 kg moving at a velocity of 51 m/s C - truck with a mass of six 6120 kg moving at a velocity of 10 m/s

How is a magnetic field generated?

When a bat uses echolocation to determine the distance to an insect, it sends out a sound wave and waits to see how long the sound takes to echo back. Suppose now that a bat hears its echo 0.06 LaTeX: ss after it emitted the sound.

An exhausted bicyclist pedals somewhat erratically when exercising on a static bicycle. The angular velocity of the wheels follows the equation? (t) = at? bsin (ct) fort?0, where t represents time (measured in seconds), a = 0.500 rad/s2, b = 0.

This boy uses a force to lift a heavy rock. (He is carrying it.) What can the boy do if he wants to lift the same rock more quickly? A. use greater upward force B. use greater downward force C. decrease the force of gravity D.