How long would it take a bus driver at 50 km / h to travel 125km

A radio wave has a frequency of 1000Hz. What is the energy of the wave?

What is PACS and give an example of how it would be used?

How did Kepler's discoveries contribute to astronomy?

How many degrees does earth rotate to the east every hour?

What is a wavelength? How is it different from frequency?

A rocket, which is in deep space and initially at rest relative to an inertial reference frame, has a mass of 50.2 * 105 kg, of which 12.5 * 105 kg is fuel.

Since Earth is attracted to the sun, why doesn't it fall into the sun? A. Because it has too much mass to move toward the sun B. Because it has sufficient tangential velocity C. Because there is an equal force holding it away from the sun D.

In what order do the earth, sun, and moon line up in a totla solar eclipse

StA A boat takes off from the dock at 2.5 m/s and speeds up at 4.2 m/s2 for 6.0 s. How far has the boat traveled? Round your answer to the nearest whole number.

How are weathering, erosion, and deposition related to the rock cycle