Heat always flows from what objects to what objects?

When a chemical change happens we sometimes see a colour change. What other observations tell you that a chemical change is happening?

3. Determining the pH of substances such as purple grape juice and catsup using test strips can be difficult. why

If a steel, thin-shelled wheel of radius r and mass M is moving along the road at 2 m/s, what is the total kinetic energy? 1) 2M 2) 3M 3) 1M 4) 5M 5) 4M

A feather, a marble, and a cannonball are dropped from the same height at the same time. If they were in a vacuum, which one would hit the ground first? O A. The cannonball would hit the ground first. O B. The marble would hit the ground first. O C.

Which statement is true about the force of gravity? (A) It is a force of attraction (B) it depends on temperature (C) it is affected by pressure (D) it rarely exists between objects

How fast must a 1000 kg car be moving to have a kinetic energy of 1.0 kWh

Which of the following is used to measure weight? Newtons Liters Kilograms Meters

Intravenous infusions are often made under gravity. At what height should the bottle be placed so the liquid pressure is 700 mm-H2O?

What conditions are required for nuclear fusion that prevent it from being used to generate electric energy?

What conditions in the nucleus are likely to result in the nucleus breaking apart? A. When the repulsion of the strong force is weaker than the repulsion of the electrostatic force B.