Decreases efficiency by causing an energy loss to the environment? A. cooling B. Friction C. Working input D. Potential energy

A rocky space object of varying size

Why does a gun recoil when a bullet is fired?

Two electrodes connected to a 9.0 V battery are charged to ±45 nC. What is the capacitance of the electrodes?

Sejumlah gas ideal menjalani proses isotermik sehingga tekanannya menjadi 2 kali tekanan semula. volume gas ideal menjadi

An engine manufacturer makes the claim that the engine they have developed will, on each cycle take 100 J of heat out of boiling water at 100 deg C, do mechanical work of 80J, and exhaust 20 J of heat at 10 deg C.

Planetary nebulae are characterized by an emission spectrum consisting of Balmer (hydrogen) emission lines and a pair of strong emission lines at 4959˚A and 5007˚A that were quite mysterious when first seen.

What is the mass of oxygen in an oxygen tank at 20 C if the tank has a volume of 0.20 m3 and the oxygen pressure in the tank is 4.0 105 N/m2 (mass of one mole of one mole of oxygen is 16 g and the universal gas constant is 8.

What is one advantage infrared astronomy has over visible light astronomy?

A 60-kg runner raises his center of mass approximately 0.5 m with each step. Although his leg muscles act as a spring, recapturing the energy each time his feet touch down, there's an average 10% loss with each compression.

Two cyclists who weigh the same and have identical bicycles ride up the same mountain, both starting at the same time. Joe rides straight up the mountain, and Bob rides up the longer road that has a lower grade. Joe gets to the top before Bob.