Which of the following describes work? Energy acts on an object. Force acts on an object. Force acts on an object and causes a displacement of that object. Friction only acts on an object and causes a displacement of that object.

A swallow sitting on a fence sings a song for anyone who will listen what type of energy?

What is the difference between a comet and an asteroid? Which statement correctly answers the questions?

Two boxes of masses m and 3m are stacked. The surface between the more massive box and the horizontal surface is smooth and the surface between the boxes is rough.

The displacement of a standing wave on a string is given by

what properties of substance would you need to know in order to determine if it is a pure substance or mixture?

What scientific question does Isaac Asimov most clearly address with his story "Runaround"? A. Should robots be allowed to marry? B, should robots be treated as members of the family? C. Can robots be trained to follow a moral code? D.

The force generated by a single muscle fiber can be increased by increasing is called

Write an expression that results in a String consisting of the third through tenth characters of the String s.

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).

Two pieces of metal with exactly the same mass are placed on a surface in bright sunlight. The temperature of the 1st block increases by 3°C while the temperature of the 2nd increases by 8°C. If the specific heat of the 2nd block is 0.