Why is there a leap year day every four years?

A. to compensate for the 1/2 day that the earth revolves around the sun each year B. To compensate for the 1/4 day that the earth revolves around the sun every year.

C. because Galileo said so

Which of these planets in cassini currently orbiting? A. Mars B. Saturn C. Jupiter D. Mercury

Is momentum lost when objects collide?

What is the smallest particle representing hydrogen peroxide? a) a hydrogen atom b) a molecule c) an oxygen atom d) diatomic oxygen

A steel safe with mass M falls onto a concrete floor. Just before hitting the floor, its speed is vi. It hits the floor without rebounding, and ends up being d shorter than before.

Three particles are placed in the xy-plane. A 30 g particle is located at (3 m, 4 m), and a 40 g particle is located at (2 m, 2 m).

A moving object has a kinetic energy of 150 j and a momentum with a magnitude of 30.0 kg•m/s. determine the mass and speed of the object

How does changing depth affect water pressure

The mass of a rigid rod is 0.60 kg and its length is 39.0 cm. Calculate the moment of inertia (in kg · m2) for the rod if it is pivoted about an axis through the center of mass of the rod. (Assume the axis is perpendicular to the rod.

Does a rolling basketball have kinetic energy

Noah Formula is in an airplane which is flying at constant speed in a circular course of radius 6500 m, circling O'Hare's airplane prior to landing. Noah observed that the plane completes each round trip in 345 seconds (5 minutes & 45 seconds).