What characteristic of carbon (c) makes it essential to living organisms
a. carbon forms crystal structures under certain conditions
b. carbon can exist as a solid, liquid, or gas
c. carbon bonds in many ways with itself to form chains
d. carbon exists in radioactive forms

An air-standard stirling cycle operates with a maximum pressure of 600 psia and a minimum pressure of 10 psia. the maximum volume of the air is 10 times the minimum volume. the temperature during the heat rejection process is 100°f. calculate the specific heat added to and rejected by this cycle, as well as the net specific work produced by the cycle. use constant specific heats at room temperature. the properties of air at room temperature are r

Identical marbles are released from the same height on each of the following four frictionless ramps . compare the speed of the marbles at the end of each ramp. explain your reasoning

Which of the following is an example of units for speed