Match the following terms, 1. heat engine 2. heat pump 3. boiler 4. thermostat •a machine that converts the internal energy of a fuel into mechanical energy. •an appliance that extracts heat energy from one source and deposits it elsewhere. •an appliance that controls the maintenance temperature of a heating system. •a heating appliance that uses heat energy released from fossil fuels to warm water for use in radiant or convection heating systems.

Thomas his older brothers, who own a junk yard, on the weekends to earn extra money. he likes to them push broken-down cars to the back of the junk yard because it makes him feel strong. last saturday, they pushed three cars with different weights, and he noticed he used different amounts of force for each one. the cars were the following weights: white car: 2,700 kg red car: 1,500 kg blue car: 2,100 kg think about how much force is needed to move each car. which correctly lists the cars in order from the most to least amount of force needed to move them? a) white, blue, red b) blue, red, white c) red, white, blue d) white, red, blue

An isotope undergoes radioactive decay by emitting radiation that has a –1 charge. what other characteristic does the radiation have?

Estimate the change in the gibbs energy and molar gibbs energy of 1.0dm3 of octane when the pressure acting on it is increased from 1.0 atm to 100 atm. the mass density of octane is 0.703 g cm−3