Classify the following as a physical change or chemical change. Column A
1.
Chopping wood:
Chopping wood
2.
Burning Wood:
Burning Wood
3.
Ice cube melting:
Ice cube melting
4.
Steam from a shower:
Steam from a shower
5.
A bike rusting:
A bike rusting
Column B
a. Physical Change
b. Chemical Change

1kg of water needs to recieve 4200j of energy to go from 90 degrees to 91 degrees. what is the specific heat capacity of water? what are the units?

Arefrigerator uses r-134a as the working fluid and operates on the ideal vapor-compression refrigeration cycle except for the compression process. the refrigerant enters the evaporator at 120 kpa with a quality of 34 percent and leaves the compressor at 70°c. if the compressor consumes 450 w of power, determine (a) the mass flow rate of the refrigerant, (b) the condenser pressure, and (c) the cop of the refrigerator. (0.00644 kg/s, 800 kpa, 2.03)

Which statements did both aristotle and ptolemy assume? check all that apply.