2. A 4.5 kg model rocket is launched, expelling 152 grams of burned fuel from its exhaust at a speed of

786 m/s. What is the speed of the rocket after the fuel has burned? Ignore the forces of gravity and air

resistance.

Cognitive, emotional, and physical reasons why adolescents engage in riskier behavior

List two examples of energy transformation necessary for the sporting event to take place

Which law describes why a charged object attracts another object even though they are not in contact? A. Faraday's law B. Ohm's law C. Interaction law D. Coulomb's law

Can a twig float on water?

The unit light-year is a measure of a. temperature. b. time. c. distance. d. brightness.

Water is poured into a container that has a leak. The mass 'm' of the water is given as a function of time 't' by, m=5t^0.8 - 3t + 20, with t>=0, mass in grams and t in seconds a. at what time is the water mass greatest, and b.

Determine the mechanical energy of this object: a 1-kg ball sits on a 10-meter high cliff. A. The ball isn't moving, so the mechanical energy is zero B. 10 J C. 98 J D.

A proton that has a mass m and is moving at + 164 m/s undergoes a head-on elastic collision with a stationary carbon nucleus of mass 12m. the velocity of the proton after the collision is answer

what is the mass number in atomic mass units of an atom with 14 protons, 14 electrons, and 16 neutrons

How much work does an elephant do while moving a circus wagon 20 meters with a pulling force of 200n