What happens to the kinetic energy of a body when: a) the mass of the body is doubled at constant velocity? b) the velocity of the body is doubled at constant mass? c) the mass of the body is doubled but the velocity is reduced to half?

Which has greater kinetic energy, a car traveling at 30 km/hr or a car of half the mass traveling at 60 km/hr?

What are three features that result from deposition along a river?

A star rotates in a circular orbit about the center of its galaxy. The radius of the orbit is 6.9 x 1020 m, and the angular speed of the star is 9.2 x 10-15 rad/s.

One student uses a meterstick to measure the thickness of a textbook and obtains 4.3 cm 2 0.1 cm. Other studentsmeasure the thickness with vernier calipers and obtain four different measurements: (a) 4.32 cm i 0.01 cm. (b) 4.31 cm : 0.01 cm. (c) 4.

When a trebuchet counterweight is hoisted by soldiers, what form of energy is transferred into the machine as work?

Power=170 watts time=20 seconds

What is the charge of alpha, beta and gamma rays?

A pair of scissors is a complex machine. what simple machines make up a pair of scissors?

Methane gas absorbs red light, and methane clouds reflect blue light, giving Uranus and Neptune their distinctive blue colors. Why do Uranus and Neptune have methane clouds, but Jupiter and Saturn do not

A car traveled 1025 kilometers from El Paso to Dallas in 13.5 hours. What was it's average velocity?