What tool is used specifically for earth science

Let f(x) = x4- 8x2 . find the relativeextrema of this function using the second derivative test.

6–55 refrigerant-134a enters the condenser of a residential heat pump at 800 kpa and 358c at a rate of 0.018 kg/s and leaves at 800 kpa as a saturated liquid. if the compressor consumes 1.2 kw of power, determine (a) the cop of the heat pump and (b) the rate of heat absorption from the outside air.

Name three different units of energy used to measure heat and describe what type of situations each is usually used.