Suppose a logs mass was 5kg. After burning, the mass of the ash is 1 kg. Explain what may have happened to the other 4kg?

When ice is left outside on a hot day, it melts, and then evaporates. Which best describes what happens to the molecules in the ice?

Which one is the best to measure a tree kilometers, millimeters, liters or meters?

How can you make water boil at 105*c instead of 100*c?

565900 seconds into day

Explain the relationship between work, force, and distance.

4. Water is flowing at 12m/s in a horizontal pipe under a pressure of 600kpa radius 2cm. a. What is the speed of the water on the other side of 0.5cm radius? b. What is the pressure of the other side?

What caused the solar system to form a disk?

Under what circumstances can air resistance exercises ignored?

How does friction affect all moving objects?

A force of 5N compresses a spring by 4cm. Find the force constant of the spring.