How much work must be done to accelerate an 8.5*10^5 kg train from a) 10m/s to 15m/s b) 15m/s to 20m/s and c) to an Initial stop of 20m/s

A car with a mass of 2,200 kg can accelerate from 0 to 30 m/s in 6 seconds. A. Assuming all of the force generated by the engine goes into acceleration of the car, how much force is the engine producing? Show your work.

Select the correct answer. Light incident on a surface at an angle of 45° undergoes diffused reflection. At what angle will it reflect? A. only at angles less than 45° B. only at angles greater than 45° C.

Hardness is indirectly related to: specific gravity surface roughness strength of chemical bonds weight

A particle moves according to the equation x = 11t^2, where x is in meters and t is in seconds. (a) Find the average velocity for the time interval from 2.20 s to 2.95 s (b) Find the average velocity for the time interval from 2.20 s to 2.40 s

A gasoline engine transforms approximately 34 percent of the fuel's chemical energy into mechanical energy. If energy is conserved, what happens to the other 66 percent? A) Most is transformed into thermal energy.

What do radio waves and microwaves have in common? A. Both have shorter wavelengths than visible light. B. Both are located to the right of visible lights on the spectrum. C. Both have higher frequencies than visible light. D.

How long can you keep string cheese in the fridge?

A particular motor can provide a maximum torque of 110 n • m. assuming that all of this torque is used to accelerate a solid, uniform, cylindrical flywheel of mass 10.0 kg and radius 3.

Round your answers to one decimal place. This parallel circuit has two resistors at 15 and 40 ohms. What is the total resistance? Ω If there is a 12 V battery in the circuit, what would the approximate current be? A

Energy transfer by convection is usually restricted to what type of substance?