Total energy input is 1400 and my efficiency is 80% so what is the useful energy output in jules?

In pottery class, you throw a pot from a lump of wet clay. your pot's mass is 5.5 kg. after the pot is fired, it's mass is 4.9 kg. the density of wet clay is 1.60 g/cm3 and the density of fired clay is 1.36 g/cm3.

Which machine would be an alternative to lifting a crate with a pulley? a. doorstop b. ramp c. ax d. screw

If the acceleration due to gravity at the surface of planet x is double the value of earth's, how does planet x's mass compare to earth's?

If the supply of tennis balls, a complement to tennis racquets, decreases, what will happen to the equilibrium price of tennis balls and to the equilibrium price of tennis racquets?

All the forces within a closed system are a) internal b) external c) due to gravity d) angular

4. How far does a car travel in 90 seconds if it is traveling at a speed of 55 m/s?

Total energy input is 1400 and my efficiency is 80% so what is the useful energy output in jules?

What is the force of gravity acting on a 2000-kg spacecraft when it orbits two Earth radii from the Earth's center (that is a distance r=6380 km above the Earth's Surface. The mass of the Earth is 5.98 x 1024 kg.

An LC circuit has a 6.00 mH inductor. The current has its maximum value of 0.570 A at t = 0s. A short time later the capacitor reaches its maximum potential difference of 66.0 V. What is the value of the capacitance?

The first law of thermodynamics states that ΔE = Q - W. Is this also a statement of the principle of conservation of energy? Yes, the heat added and the change in internal energy of the gas equal the work done by the piston.