1. An electric current of 0.028 A flows through a vacuum tube. What is

a) the amount of charge

b) the number of electrons

passing through the tube in 75 s?

A huge cannon is assembled on an airless planet having insignificant axial spin. The planet has a radius of 5.00 * 106 m and a mass of 1.46 * 1023 kg. The cannon fires a projectile straight up at 2000 m/s.

Not all energy sources derive their energy from the sun. Choose the three from the list below that derive their energy from sources other than the sun. chemical heat light geothermal nuclear tidal

Under what condition is the instantaneous acceleration of a moving body equal to its average acceleration over time? A. only at positive accelerations B. only at negative accelerations C. only at zero acceleration D. only at constant accelerations

The power rating of a vacuum cleaner is 0.8 kilowatts. If you use the vacuum cleaner for 2.5 hours, how much energy does it use?

Why it's easy to slip on a floor that is wet

One kilowatt-hour is equal to the energy consumed by an electric device of 1 W for 1 hour true or false

Why does a collision with an airbag cause less damage than a collision with a steering wheel

A car weighing 15,000 N is on hydraulic lift platform measuring 10m2. What is the area of the smaller psition if a force of 1,100n is used to lift the car?

What are some household items that demonstrate thermodynamics

The position of a certain airplane during takeoff is given by x=1/2 * bt2, where b = 2.0 m/s2 and t = 0 corresponds to the instant at which the airplane's brakes are released at position x = 0.