How can you make work output of a machine greater than the work input?

How much do you know about the water cycle and the impact that humans have on the water cycle?

A grasshopper can jump a maximum horizontal distance of 40cm. If it spends negligible time on the ground then in this case its speed along horizontal road will be

Calculate How much energy is transferred as useful energy =A 98% efficient kettle that has a total input of 2000J

A wire has a current that flows to the right. Which describes the magnetic field produced by the current? A. straight lines along the wire to the right B. straight lines along the wire to the left C. circles around the wire that go in at the top D.

The origin of the universe remains a question. true false

A rotating water pump works by taking water in at one side of a rotating wheel, and expelling it from the other side. If a pump with a radius of 0.120 m starts from rest and accelerates at 30.

Which describes a property shared by ultraviolet light and X-rays? A They are both transverse waves. B They share the same wavelength. C They contain less energy than visible light. D They both require a medium to travel through.

What is the potential energy called that is associated with objects that can be stretched

Which of the following is not a current use of radioisotopes? medical diagnosis sterilization of equipment detection of leaks in building structures light fixtures

A Blu-ray disc is approximately 11 centimeters in diameter. The drive motor of a Blu-ray player is able to rotate up to 10,000 revolutions per minute. (a) Find the maximum angular speed (in radians per second) of a Blu-ray disc as it rotates