Why is it impossible to build a machine that produces more energy than it uses?

when you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, you make the time of the impact about 10 times as great as for a stiff legged landing.

A fighter pilot experiences a force of 1000N to the west. If his mass is 70kg, what is his acceleration

Energy stored between charged particles is called static energy electrical potential energy kinetic energy mechanical energy

What is the wavelength of a sound Wave moving at 340 mls with a Frequency of 256Hz?

Which of these elements is most likely to form an ionic bond with potassium? is it Argon Chlorine Sulfur or phosphorus

The intensity of the sun's radiation incident upon the earth is about i=1.4kw/m2. suppose this is the value for the intensity of sunlight incident upon the satellite's solar panels. what is the total solar power p absorbed by the panels?

Which possible discovery would be attributed to an inorganic molecule? a protein that contains more energy than lipids a fireproofing spray used in firefighting a new energy-efficient fuel source a synthetic polymer that resists degrading

A light beam in air strikes the surface of water at an angle of 26° with the normal. When it enters the water it bends toward the normal, making an angle of 19° with it. The velocity of light in air is approximately 300,000 km/s.

Which best explains the relationship between the speed of sound and the medium through which it passes?

g The magnetic force on a charged particle A. depends on the sign of the charge on the particle. B. depends on the velocity of the particle. C. depends on the magnetic field at the particle's instantaneous position. D.