9. An astronaut of mass 90 kg walks in space outside her spaceship and receives a 30-N force from a nitrogen spurt gun. What acceleration does she experience?

What is physical fitness?

The energy associated with motion is called a. kinetic energy. b. elastic potential energy. c. gravitational potential energy. d. nuclear energy.

Calculate the energy transferred from a glass of water in order to just melt 100 g of ice cubes at 0°C. Specific latent heat of fusion for water = 340 000 J/kg

Write out a correct version of: "the fuel in a nuclear power station is hydrogen gas"

What's the mathematical formula for density

A roller coaster has a mass of 500 kg. It drops from rest at the top of a hill that's 57 m tall. How fast is it going when it reaches the bottom? Acceleration due to gravity is g = 9.8 m/s2.

Two sinusoidal waves are moving through a medium in the positive x-direction, both having amplitudes of 7.00 cm, a wave number of k=3.00m-1, an angular frequency of ω=2.50s-1, and a period of 6.00 s, but one has a phase shift of an angle ϕ=π12rad.

For a vacation, you and your family fly east to west from Boston, Massachusetts, to Seattle, Washington. You notice that your flight back home to Boston is shorter than your flight to Seattle. Which phenomenon causes your flight home to be shorter?

You spy on an anchor on the bottom of a lake. What is the direction and amount of force the water exerts on it: a) zero b) up, equal to the weight of the anchor. c) up, less than the weight of the anchor d) down, equal to the weight of the anchor.

How are electromagnetic waves different from matter waves?