Mr. Bennet's class completed an investigation on magnetism. They found that most metals were attracted to magnets and plastics were not. What will happen if Mr. Bennet's class repeats the investigation?

A most metails would be attracted to magnets and plastics would not.

B plastics would be attracted to magnets and metals would not.

C both metals and plastics would be attracted to magnets.

D neither metals nor plastics would be attracted to magnets.

Asun-sized star will spend most of its lifetime as a: white dwarf red giant protostar main-sequence star

Explain what will happen if decomposers were apsent from a forest ecoysystem.

An ideal otto cycle has a compression ratio of 8. at the beginning of the compression process, air is at 95 kpa and 27°c, and 750 kj/kg of heat is transferred to air during the constant-volume heat-addition process. assuming constant specific heats at room temperature, determine (a) the pressure and temperature at the end of the heat-addition process, (b) the net work output, (c) the thermal efficiency, and (d) the mean effective pressure for the cycle. (4390 kpa, 1730 k; 423 kj/kg; 56.4%; 534 kpa)