Which is true of a mechanical wave?

A) It must have a medium.

B) It must travel in empty space.

C) Both sound and light are examples.

D) It can travel in a vacuum.

What are the products of a fission reaction? Check all that apply. lighter atoms energy heavier atoms neutrons protons

On the moon, the acceleration of gravity is 1.6 m/s2. If an object has a mass on Earth of 5.1 kg, what is its mass on the moon?

Pushing on the pump of a soap dispenser compresses a small spring. When the spring is compressed 0.48 cm, its potential energy is 0.0025J. What compression (in cm) is required for the spring potential energy to equal 0.0089 J?

How far in advance of making a turn do you have to activate your turn signal?

What is glucose made of

An example of an unbalanced force is

When the atom's electrons step down to lower energy levels in a thin cloud of hot gas, what is produced?

Which is the relationship between algae and fungus? Options: Parasitism. Commensalism. Mutualism.

Photosynthesis is an endothermic chemical reaction that forms sugars from carbon dioxide, water, and the sun's energy. Which of the following must be true of photosynthesis?

What is a calorimeter used to measure?