Give two disadvantage of hydroelectric power

If ti takes 50 seconds to lift 10 newtons of books to a height of 7 meters, calculate the power required.

What will be the amount of heat required to raise the temperature of 3 kg of paraffin by 10 degree C if 44000joules of heat energy is required to raise the temperature of 1 kg of paraffin by 20 degree C

Explain two reason why Si is easier to use than the English system

An eagle has a mass of 8 kg and is flying 85 m above the ground with a speed of 20 m/s. what is the total mechanical energy of the eagle?

Take the north direction as the positive y direction and east as positive x. The origin is still where the student starts biking. Let d⃗ N be the displacement vector corresponding to the first leg of the student's trip.

The universe is believed to have been form from a very dense fireball billions of years ago.

What does the slope of the line on this velocity versus time graph represent? A. positive deceleration B. zero acceleration C. positive acceleration D. negative acceleration

Which of the following objects has the greatest kinetic energy? a baseball flying through the air at 90 miles per hour a baseball flying through the air at 45 miles per hour a baseball flying through the air at 20 miles per hour a baseball sitting

Peter found an amazing fact in an amusement park when he tried to ride the Magic Mountain Superman. Powerful magnets accelerate a car and its riders from zero to 45 m/s in 7 seconds. Suppose the mass of the car and riders is 5,600 kg.

The formula s = 16t2 gives the distance an object falls due to gravity, where s is the distance in feet and t is the time in seconds. how many feet will the object fall in 6 seconds?