Consider the moon rocks that the crew of Apollo 11 brought back from Mare Tranquillitatis. Within the zircon crystals within these rocks, we find approximately 15 atoms of 207Pb for every atom of 235U. How old is Mare Tranquillitatis?

What would you use to measure distance east and west of the prime meridian

How does a free body diagram tell you about the net force of an object

What type of reaction is occurring when you activate an instant cold pack?

The speed of sound is dependent on which of the following? the medium through which the sound travels the object that creates the sound the refraction of the sound none of the above

A ball of mass 2 kg fallsfrom a rof that is 5 m above the ground. How much gravitational potential energy did the ball lose when it reached the ground, in units of joules? give your answer as a positive value

Is it possible to get a bruise inside your body?

he Period refers to the time it takes an individual particle (or coil) to complete one back and forth vibration about its fixed position. Contrast a low period set of continuous vibrations with a high period set of continuous vibrations.

The velocity - time graph of a ball of mass 25g moving on road is as given below: (a) How much force does the road exert on the ball to bring it to rest? (b) What is the direction of the force exerted by the road?

An explosion that destroys a massive star is called a A. nebula. B. black hole. C. vacuum. D. supernova.

There are 100 cm in every meter. If a measurement is 1.67 m, what is the measurement expressed in centimeters?