How long does it take the earth to spin on its axis once?

In a pendulum system, does the kinetic exceed the potenial energy? Explain.

A pot contains 257 g of water at 99°C. If this water is heated and all evaporates to form steam at 100°C, what is the change in the entropy of the H2O?

An object of mass 0.50 kg is transported to the surface of Planet X where the object's weight is measured to be 20 N. The radius of the planet is 4.0 ' 106 m. What free fall accerleration will the 0.

Which has greater kinetic energy: a bullet that has a mass of 0.05 kg travelling at 2500 m/s, or a lorry that has a mass of 4500 kg and is moving at 50 m/s?

Which of the following only allows one path for the current to flow through? A. Parallel B. series

Which of the following explains what is meant by the statement "scientific knowledge is universal"? The rules cannot be determined. The rules only apply in certain parts of the universe. The rules depend on experiments from different countries.

The force of friction on a sliding object is 10n. the applied force needed to maintain a constant velocity is:

Which of the following methods of improving air quality does not require advanced technology?

When two waves with the same amplitude overlap so that a crest lines up with a trough, the resulting wave ...

Suppose the Sun suddenly stopped emitting light. How long would it take, in seconds, for the Sun's light to disappear on Earth? (Hint: The Sun is an average of 150 million km from Earth).