25. You lift a book from the floor to a bookshelf 1.0 m above the ground. How much power is used if the

upward force is 15.0 N and you do the work in 2.0?

dado los vectores a=3.5 b=4 c=6.5, si se sabe que a+b+c=0 (resultante) cual es el angulo formado por A y B?

A projectile is fired straight upward with an initial veloc - ity of 100 m=s from the top of a building 20 m high and falls to the ground at the base of the building.

What are man-made levees made out of?

If a coil is rotated in a magnetic field at twice the speed - - ie twice the frequency - - the amplitude of the EMF induced in the loop will ... A. remain unchaged B. reduce by half C. double

A light bulb is connected to a 2V supply and experiences a current of 6.4A. What is the power rating of the bulb?

What two variables is acceleration dependent on? What is the relationship between these variables and acceleration? (i. E. If you increase one variable what happens to the acceleration?)

1 A plane moving at 30m/s drops a load 200m down to the ground. How long did it take to hit the ground.

What causes lightining?

On an amusement park ride, riders stand inside a cylinder of radius 7.0 m. At first the cylinder rotates horizontally. Then after the cylinder has acquired sufficient speed, it tilts into a vertical plane, as shown in the diagram.

Largest group of rock forming mineral's are