Which earthquake scale is based mostly on human opinion and perception of recent events? richter scale moment magnitude scale modified mercalli scale fujita scale saffir-simpson scale?

A spaceship travels at 1,321 km/h. How many miles can it travel in 6.19 seconds?

As gravity continues to crush the inner core, the fusion of carbon and oxygen begins. What temperature is needed for the fusion of carbon and oxygen into heavier elements?

If you move two objects father Paul how does the force of gravity between the two objects change

Object a with a mass of 1.5 kilograms is moving with a velocity of 11.2 meters/second (moving in the x direction). it has a perfectly elastic collision with stationary object b that has a mass of 4.5 kilograms.

A mechanical device requires 420 J of work to do 230 J of work to lift a crate. What is the efficiency of the device? 190% 0.5% 183% 55%

The gravitational force a. is a natural force like the strong and weak nuclear forces. b. weakens as 1/d, where d is the distance between objects. c. is the fundamental force repelling two masses from each other. d.

What are the minimum requirements for airplane operations under special VFR in Class D airspace at night?

Can the magnitude of a particle's displacement be greater than the distance traveled? explain.

An increase of 50 dB increases the sound intensity by a factor of

What is the definition of "potential energy"? A. Energy that is developed by an object while it's in motion B. The energy that a piece of matter has because of its position or because of the arrangement of parts C. An object that stays at rest D.