When a block with a hole in it is heated why does not the material around the hole expand into the hole and make it small

1. third law Every applied force is opposed by an equal force. 2. second law A force must be applied to change an object's velocity. 3. first law Acceleration is affected by mass.

A child rides a bicycle in a circular path with a radius of 2.0 m. The tangential speed of the bicycle is 2.0 m/s. The combined mass of the bicycle and the child is 43 kg. What is the magnitude of the bicycle's centripetal acceleration? a. 1.

When the temperature of the air is 50°C, the velocity of a sound wave traveling through the air is approximately? A. 381 m/s B. 30 m/s C. 361 m/s D. 50 m/s

In which layer of earth is the asthenosphere located?

Calculate the energy of the orange light emitted, per photon, by a neon sign with a frequency of 4.89 * 1014 hz.

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).