My grass is dying, and I believe it's because it is not getting enough water. So I decide to conduct an experiment by watering the backyard everyday for two
weeks, while leaving my front yard alone. After two weeks I measure the length
of my grass to determine which grew better. What variable(s) should be
controlled?

a. amount of sunlight
b. temperature
c. type of grass
d. all of the above

Acommercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -35°c by rejecting waste heat to cooling water that enters the condenser at 18°c at a rate of 0.25 kg/s and leaves at 26°c. the refrigerant enters the condenser at 1.2 mpa and 50°c. if the compressor consumes 3.3 kw of power, determine (a) the mass flow rate of the refrigerant, (b) the refrigeration load, (c) the cop, and (d) the minimum power input to the compressor for the same refrigeration load.

Carbon tetrachloride (ccl4) is ionic or convalent

To solve a problem using the equation for kepler ‘s third law , enrico must convert the average distance of mars from the sun from meters into astronomical units . how should he make the conversion ?