Physics Answers

Compare and contrast. Mechanical wave and electromagnetic wave.

What would the world be without waves? (3-5 sentences)

Answer with 3-5 sentences. What causes periodic motion?

Solve the problem involving the third law of Kepler's planetary motion with complete solutions. Determine the period of a pendulum using the following lengths:

A) 4.0 m

B) 7.5 m

C) 15 m

Solve the problem involving the third law of Kepler's planetary motion with complete solution. It takes 365.25 days for Earth to complete one revolution around the sun. Calculate the A) period B) frequency C) angular frequency of Earth as it revolves around the sun

Solve the problem involving the third law of Kepler's planetary motion with complete solutions. The mean distance of an object A from the Sun is 19.6 x 10^9 km and the mean distance of object B from the Sun is 57.9 x 10^8 km. The period of Earth's revolution is 1 year, what is the period of objects B's revolution?

Solve the problem involving the third law of Kepler's planetary motion with complete solutions. Mars takes 1.88 years to complete one orbit around the sun. What is its average distance from the sun?

How can Kepler's laws of planetary motion and Newton's law of universal gravitation be used to describe planetary motion?

What must be the radius of a star of mass 2 x 10^30 kg so that the escape speed from this star is equal to 2 x 10^8 m/s?

The moon has a mass of 7.35 x 10^22 kg and a radius of 1.738 x 10^6 m. At what speed must a rocket be launched from the moon's surface so as not to fall back to moon.