What is the potential energy of a 2 kg book sitting on a shelf 2 meters above the ground

A 1500 kg car travelling at 25 m/s collides with a 2500 kg van which had stopped at a traffic light. As a result of the collision the two vehicles become entangled.

Explain why changes of state are physical changes

Dissociative disorders can appear when: ) A. a person experiments with drugs. B. a person associates with another person with the disorder. O C. a person has had an accident. D. a person is under excessive stress.

What should you do immediately if a boat motor catches fire?

If you double the velocity of a moving object, how is it's momentum affected?

A science teacher ran a marathon. After the race she showed her students the silver blanket she was given to keep her warm. A group of students investigated how the colour of the blanket affected how much infrared radiation is absorbed

Students asked to measure the temperature of a reaction beaker recorded the following temperatures. 103.7°C, 108.4°C, 105.8°C, 104.6°C The actual temperature is 105.1°C. Which measurement is the most precise

Two atoms that are isotopes of one another must have a different number of what? electrons neutrons protons all particles

How can you use the newton's second law to find force?

Define and describe a mixture using examples.