An element's mass number tells the number of protons in its nucleus true or false?

What Could be the control in an experiment to measure the effects of gas additives on fuel

If a 10kg block is at rest on a table and a 1200N force is applied in the eastward direction for 10 seconds, what is the acceleration on the block?

Explain how overgrazing can lead to dessert-like conditions and correctly? give examples of 3 ways ranchers can use rangelands sustainably

When a balloon is deflating, why does air leave the balloon?

describe what is meant by "a constant change of direction". Identify whether the examples provided show a constant change of direction when moving

You are caring for a person who was involved in an automobile collision. The woman is complaining of pain in her abdomen, nausea and extreme thirst. She also is breathing rapidly. Which of the following would you suspect?

A fountain of water and steam that erupts from the ground

A heavy rope, 50 ft long, weighs 0.5 lb/ft and hangs over the edge of a building 120 ft high. how much work is done (in ft-lb) in pulling half the rope to the top of the building?

Does adding a neutron to an atom's nucleus makes it an ion?

What is the difference between a fault-block and upwarped mountains?