Model rocket engines are rated by the impulse that they deliver when they fire. a particular engine is rated to deliver an impulse of 3.5 kg #m/s. the engine powers a 120 g rocket, including the mass of the engine. what is the final speed of the rocket once the engine has fired?

When the velocity of an object is doubled, by what factor is its momentum changed? by what factor is its kinetic energy changed? a) the momentum is zero. b) the momentum is not zero. c) difficult to say.

If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =

Which statement correctly describes the current in a circuit that is made up of any two resistors connected in parallel with a battery? a. the current in the battery and in each resistor is the same b. the current the battery equals to the sum of the currents in the resistors c.the current in the battery is less than the current in either resistor d. the current in the battery equals to the product of the currents in the resistors