Describe what happens to the potential energy and the kinetic energy of a ball as it rolls down a hill from a position of rest at the top of the hill

If a landlord does not allow you to have pets in the building, but allows you to have a dog, is that an exception? Why or why not?

What defines an exothermic reaction? O A. A reaction that needs heat added O B. A reaction that possesses enthalpy O c. A reaction that relies on collisions O D. A reaction that produces heat

Generating energy through combustion of renewable biofuels that cause minimal harm to the environment is an example of

Which of the following will affect the rate of a chemical reaction? solution concentration solution density solute mass solution volume

Witch step in the scientific method involves making an inference A. Retest by other scientists B. Do background research C. Test with an experiment D. Draw a conclusion

Xander is gaining weight. Which best describes what he can do to prevent obesity? exercise every day and also make healthy choices in his diet excercise once a week but make no change in his diet exercise once a week and also make healthy choices in

The town in the video stressed using locally made goods instead of imported goods. How could using locally made goods lower CO2 emissions?

Calculate the ΔHrxn for the following reaction: CH4 (g) + 2Cl2 (g) - - > CH2Cl2 (g) + 2HCl (g) Use the following reaction and given ΔH's: CH4 (g) + Cl2 (g) - - > CH3Cl (g) + HCl (g), ΔH = - 99.

Select all that apply to diffusion. A solid cannot diffuse in to another solid. Solids can diffuse in liquids. Liquids can diffuse in liquids. It is the process of intermingling atoms from one substance into another.

We are all familiar with the general principles of operation of an internal combustion engine: the combustion of fuel drives out the piston.