Answer:
Total kinetic energy= 400 puondal foot
Kinetic energy per unit mass= 8 (poundaul foot/lb)
Explanation:
To determine the total kinetic energy of the block we use the equation:
Kinetic energy = (1/2) × m × (v^{2}) = (1/2) × (50lb) × (4 foot/s)^{2}) =
= 400 poundal foot
To establish the kinetic energy per unit of mass we must simply divide the value of the total kinetic energy obtained previously by the mass of the block obtaining:
Kinetic energy per unit mass= (400 poundal foot) / (50lb) =
= 8 (poundaul foot/lb)
Answer:
False
Explanation:
COP is Coeficient of performance, it relates useful heat moved with work consumed, it is used in refrigerators and heat pumps.
For refrigerators the useful heat is the one extracted from the cold reservoir. Therefore:
This often exceeds 1.
I don’t know if I’m right but I’m guessing B
Answer:
I select false because engineers are not the only thing we have, we have scientists doctors mathematicians and much more to give safety standards
