The atomic number of an element is found by counting the

How much work does a mother do if she lifts each of her twin babies upward 1 meter? Each baby weighs 90 newtons.

If you hold a ball up in the air and drop it, you change the ball's potential energy to kinetic energy: True or False

What happens when you shoot a bullet into the sky?

What is the heat transfer by the movement of a fluid?

Georgie was pulling her brother (of mass 16 kg) in a 9.4 kg sled with a constant force of 39 N for one block (128 m). How much work did Georgie do? Answer in units of J.

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).