If a solar panel phone charger has a total energy input of 6.25W, and an efficiency of 40% (2.5W), is only 2.5J of energy going to the phone a second?

A 25 kg object is falling towards the earth with a velocity of 8.5 m/s when it is 100 m above the ground. What will be its velocity when it is 20 m above the ground it energy is conserved? ½mv² + mgh = ½mv² + mgh ½ (25.0kg) (8.5 m/s) ² + (25.

If a 1,300 kg car with no people inside is on the edge of a cliff 1,500 m above the ground, what is its potential energy?

Which best describes the current atomic model?

Sergei tees off on a stationary hockey puck using his most powerful slap shot. If he can exert a force of 250 N on the 500 gram puck for a time of 0.

What describes how much matter is in a object?

Since you've determined that the power supply is a 700W dual rail, what does that make the maximum output power?

A 2 m length of an aluminum pipe of 240 mm outer diameter and 10 mm wall thickness is used as a short column to carry a 640? centric axial load. Knowing that? = 73? P? and? = 0.

A python can detect thermal radiation from objects that differ in temperature from their environment as long as the received intensity of thermal radiation is greater than 0.60 W/m2. Your body emits a good deal of thermal radiation.

A planet has a mass of about 6.4 x 1023 kg, and its moon has a mass of about 9.6 x 1015 kg. if the magnitude of the gravitational force between the two bodies is 4.6 x 1015 n, how far apart are the planet and its moon? a. 9.4 x 106 c. 4.6 x 109 b. 2.

Is burning a nonrenewable natural gas a chemical change