The valve seat performs two functions: it provides a seal for the valve in the combustion chamber, and it provides a cool surface to carry heat away from the valve. most valves use a seating angle. a. 30 b. 60 c. 45 d. 15

In her notes, celeste wrote that the human body systems consist of molecules, cells, tissues, organs, and organ systems. what problem will celeste have on her body systems test when she studies this information? she forgot to list organism as a level. she should have written chemicals/molecules. this is not the correct sequence. these are not body systems.

Another term for an organizational aid is ‘assistive image’. select the best answer from the choices provided

Poland had achieved self government and can enjoy its since the collapse of the soviet union a: autonomy b: ingenuity c: feminismd: genocide