Energy

Which is the best term to use when describing the energy of position? chemical kinetic potential electromagnetic

potential

A welding torch produces a flame by burning acetylene fuel in the presence of oxygen. The energy released from the acetylene fuel is then used to melt a metal. Which energy transformation happens during this process? Chemical energy turns into thermal energy. Kinetic energy turns into potential energy. Thermal energy turns into electromagnetic energy. Potential energy turns into chemical energy.

Chemical energy turns into thermal energy.

An arrow is fired at a target on a high wall. Which statement correctly describes the change in the energy of the arrow as it moves toward the target? The potential energy and kinetic energy remain the same. The potential energy decreases as kinetic energy increases. The kinetic energy decreases as potential energy increases. The kinetic energy remains at zero, but potential energy increases.

The kinetic energy decreases as potential energy increases.

Old photographic flashbulbs burn magnesium metal in a reaction that causes a flash of brilliant white light. A photographer would need to take care not to suffer burned fingers when trying to replace the hot bulb. What best identifies the energy transformation that occurs in the flashbulb? chemical energy to electromagnetic energy and thermal energy electromagnetic energy to chemical energy and thermal energy chemical energy to electromagnetic energy thermal energy to chemical energy

chemical energy to electromagnetic energy and thermal energy

Which is the best term to use when describing the energy of motion? chemical kinetic potential thermal

kinetic

In a chemical reaction occurring in an open beaker, the reactants have a mass of 10.0 g and contain 1000 J of energy. The products in the beaker contain a mass of 5.0 g and 500 J of energy. Which best explains the difference in energy and mass as reactants are converted to products? kinetic energy closed systems law of conservation electromagnetic energy

law of conservation

A baseball player hits a ball. Which is the best description of the energy of the ball as it flies over the pitcher's head? chemical mechanical kinetic thermal

mechanical

Thermal energy is the energy associated with electric fields. being stored in chemical bonds. the pull of gravity. temperature.

temperature.

Consider the generic chemical equation below. X + Y ---- W + Z Reactant X contains 199.3 J of chemical energy. Reactant Y contains 272.3 J of chemical energy. Product W contains 41.9 J of chemical energy. If the reaction loses 111.6 J of chemical energy as it proceeds, how much chemical energy must product Z contain? 318.1 J 429.7 J 541.3 J 625.1 J

318.1 J

Which form of energy is directly related to the measure of the average kinetic energy of the particles in a substance? thermal energy potential energy mechanical energy electromagnetic energy

thermal energy