a man is trying to move a piano by himself, but it will not move, what force must they overcome to start the piano moving?

Explain why light is referred to as electromagnetic radiation.

If Earth had twice its present mass, but the same radius, the force of gravity would be: A) Twice as big B) Four times as big C) Half as big D) The same

Which is true regarding diffusion and osmosis? Question 3 options: a. Osmosis is a type of diffusion and is specific to water. b. Osmosis is specific to molecule movement and does not require energy. c.

How is the pressure of a gas related to its concentration of particles? A) Pressure will expand a gas, enlarging its volume and reducing its density and concentration of particles.

What happens to particles of the medium in a mechanical wave?

Woman pulls a 6.87 kg suitcase, initially at rest, with a 29.2 N force along the handle at 57.7º. Friction pulls back at 12.7 N, and the suitcase moves 5.93 m. What is its final speed? (Unit = m/s)

Suppose you know a golf ball's horizontal velocity and the time it has traveled through the air. how could you calculate how far the ball traveled

What is a radio interferometer? a device for correcting chromatic aberration in radio telescopes a device for absorbing and transmitting radio waves a network of several radio telescopes wired together a radio communication network joining several

In which galaxy is our solar system located? a. milky way b. ngc 4414 c. andromeda d. small magellanic cloud

Two astronauts, of masses 60 kg and 80 kg, are initially right next to each other and at rest in outer space. They suddenly push each other apart. How far has the heavier astronaut moved when the lighter astronaut has moved 12 m