What is the normal force of a 251.4 kg object resting on a surface (in Newton's)

At a constant pressure at a temperature of 280 k the gas in the cylinder has the volume of 10 liters if the volume of the gas is increased to 20 liters what is the new temperature

a family backpacking at Yosemite national park took 5 hours to climb a mountain trail 7.5 km long. what was the family's average speed

When light travels from air into water, A) its velocity, wavelength and frequency all change. B) its velocity changes, but its frequency and wavelength do not change. C) its frequency changes, but its velocity and wavelength do not change.

Josh manages security at a power plant. The facility is sensitive, and security is very important. He would like to incorporate two-factor authentications with physical security. Which of the options below is the best way to meet this requirement?

What does each letter in a = (Vf-Vi) / t stand for

Describe and apply Newton's Three Laws

If you do 1000j of work on a system and remove 500j of heat from it, what is the change in its internal energy

Two children stretch a jump rope between them and send wave pulses back and forth on it. The rope is 4.5 m long, its mass is 0.42 kg, and the force exerted on it by the children is 71 N.

An object will only change its motion if a force is directly applied to it. is this a true statement?

Janice has just measured the density of an object. Which value is possible? (Density: D = )