How is velocity different from speed

What is a particle faster than light?

A 50 kg boy is at the edge of a circular platform of radius 4.0 m which is rotating freely at 0.5 rad s". The moment of inertia of the platform is 1000 kg m'. Determine the new angular velocity of the platform if the boy walks 1.

Which best explains why a wood - burning fireplace represents an open system? A.) because they are all made of brick B.) because the ashes have to be swept away C.) because they can be used for cooking D.

In an inelastic collision involving an isolated system, the final total momentum isA) more than the initial momentum. B) exactly the same as the initial momentum. C) less than the initial momentum.

Thermal energy depends on an object's A. mass. B. phase (sold, liquid, or gas). C. temperature. D. all of the above

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).

What happens to particles when a substance gains energy and changes state?