The lid on a jar is an example of which simple machine

Explain Newton's First Law for the following. If you walk across the room holding a ball, when should you drop it to ensure that it lands on a target? Before, after or when you are directly on the target?

What matter will hold it's shape without a container

What are two ways to write an isotope of fluorine with 9 neutrons and no protons

Two students suggest different functions for the battery plays a flashlight. Student A: "The battery supplies the charge which allows the light bulb to light. When the battery no longer works, it is because it has run out of charge.

The earth exerts a gravitational force of 500 N on an object. What is the mass of the object in kg

The train traveled 500 kilometers north to Odessa in 2 hours. What's the train's speed? What is the velocity?

Are microwaves and radio waves faster or slower than other types of electromagnetic energy?

If you dive under-water, you notice an uncomfortable pressure on your eardrums due to the increased pressure. The human eardrum has an area of about 70 mm2 (7*10-5m2), and it can sustain a force of about 7 N without rupturing.

Why cant kinetic energy ever be greater than potential energy

For a stationary observer, when the source of a sound is moving, its pitch appears to change.