Identify the situation where work is being done.

A. Carrying a box of crayons across the room.

B. Lifting a backpack off the floor

C. Sitting on a stool

D. Holding a football

Saturn has a radius of about 9.0 earth radii, and a mass 95 times the Earth's mass. Estimate the gravitational field on the surface of Saturn compared to that on the Earth. Show your work.

Speed is a. a measure of how fast something is moving. b. always measured in terms of a unit of distance divided by a unit of time. c. the distance covered per unit time. d. all of the above. E. none of the above.

Sodium hydroxide (NaOH) was added to pure water (H2O). Which most likely were the pH values of the water before and after the sodium hydroxide was added to it? before = 7, after = 9 before = 7, after = 4 before = 4, after = 7 before = 9, after = 7

The importance of latitude and longitude

A 75 kg skateboarder is initially going 5 m/s to the right. He slows to a stop over 10 seconds. What is the direction and magnitude of the net force that causes this change?

Ultrasound. High-frequency sound waves (ultrasound) are used to probe the interior of the body, much as x rays do. To detect a small objects such as tumors, a frequency of around 5.10 MHz is used.

Which has the least potential energy

Why does the nucleus of an atom have a positive charge?

Why is the electromagnetic spectrum called a spectrum?

Ariana is accelerating her car at 4.6 m/s^2 it took her 10 seconds to reach this acceleration her starting lost the day was 0 meters per second what was her final velocity