Two nuclei have mass number in the ratio of 2:5 what is the ratio of their number densities

Which volcanic hazard can block the sunlight and temporarily cool the Earth's surface?

To use Faraday's law for this problem, you will need to construct a suitable loop, around which you will integrate the electric field. In which plane should the loop lie to get a nonzero electric field line integral and a nonzero magnetic flux? a.

If you double the voltage in a circuit and reduce the resistance by a factor of four, what will happen to the current? OA It will double. B. It will decrease by a factor of 2. C. It will increase by a factor of 8. D.

When density increases, what happens to the number of molecules in a volume of air?

Use the graph to determine the instantaneous speed at 2 seconds. m/s What is the average speed over the entire trip? m/s

Like matter, energy cycles continuously through an ecosystem. a. True b. False User: Like matter, energy cycles continuously through an ecosystem. True or False

A room is being accelerated through space at 7 m/s2 relative to the "fixed stars." it is far away from any massive objects. if a man weighs 500 n when he is at rest on earth, how much will he weigh in the room?

About what is Rigel's surface temperature?

A 75.2 kg ice skater, moving at 7.7 m/s, crashes into a stationary skater of equal mass. After the collision, the two skaters move as a unit at 3.85 m/s. Suppose the average force a skater can experience without breaking a bone is 4824 N.

Amy counts the wave crests traveling down a stretched string. Five wave crests pass Amy in two seconds. What is the frequency of the wave? A. 5.0 Hz B. 2.5 Hz C. 10 Hz D. 2.0 Hz