Based on the law of conservation of energy hiw can we reasonably improve a machines ability to do work

Which statement is true about wind energy? A) It is clean and non-polluting. B) It is only effective near water. C) It is costly and hard to produce. D) It is not as useful as fossil fuels.

A tennis player hits a 58 g tennis ball so that it goes straight up and reaches a maximum height of 6.17 m. How much work does gravity do on the ball on the way up?

Ella jogs down the street with a speed of 12 m/s. What is her kinetic energy if her mass is 58 kg?

What is the definition of recoil velocity?

A 70 pF capacitor and a 280 pF capacitor are both charged to 3.6 kV. They are then disconnected from the voltage source and are connected together, positive plate to positive plate and negative plate to negative plate.

A fast, white water cascade is also known as what?

What is a stack of membranes that packages chemicals

Under what condition (s) will an object be in equilibrium? Notice that equilibrium in physics has a broader definition. (A) Only if it is moving with constant velocity. (B) Only if it is at rest.

If a pressure gauge measure an increase in 3*10^ (5) Pa on an area of 0.7 m^2, calculate the increase in the force applied to the area?

Which of the following is an example of potential rather than kinetic energy? a. water rushing over Niagara Falls b. a molecule of glucose c. a crawling beetle foraging for food d. light flashes emitted by a firefly