A spring is 14cm long. Three masses are hung from it and then it is measured again. Now it is 19.5cm long. What force did the three masses provide? The spring constant for the spring is 30N/m.

According to the tide table below what time of day will the highest tide occur?

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical