What two forces are balanced in what we call gravitational equilibrium?

A) the electromagnetic force and gravity
B) outward pressure and the strong force
C) outward pressure and inward gravity
D) the strong force and gravity
E) the strong force and kinetic energy


C

Physics & Space Science

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Two pure tones are sounded together and a particular beat frequency is heard. What happens to the beat frequency if the frequency of one of the tones is increased?

A) It does not change. B) It decreases. C) It could either increase or decrease. D) It increases.

Physics & Space Science

Ethyne, H–C?C–H, is also named ______________

Fill in the blank(s) with correct word

Physics & Space Science

Uniform Circular Motion: The maximum acceleration a pilot can stand without blacking out is about 7.0 g. In an endurance test for a jet plane's pilot, what is the maximum speed he can tolerate if he is spun in a horizontal circle of diameter 85 m?

Fill in the blank(s) with the appropriate word(s).

Physics & Space Science

Determine the change in length of a 20-m railroad track made of steel if the temperature is changed from ?15°C to +35°C. (?STEEL = 1.1 × 10^?5/°C)

Physics & Space Science