Answer:
Machine used 392 MJ energy as mechanical energy.
Explanation:
Efficiency(e) is defined as the ratio of the work done by the machine to the energy provided to the machine.
.....(1)
The efficiency of the machine is also given by the relation :
.....(2)
Here T(low) and T(high) denotes the temperature in kelvin.
According to the problem, T(low) = 35⁰ C = 35 + 273 = 308 K
T(high) = 330⁰ C = 330 +273 = 603 K
Substitute the values of T(low) and T(high) in the equation (2).
e = 0.49
According to the problem, Energy Given = 800 MJ
Substitute the value of efficiency(e) and Energy Given in the equation (1).
Energy used = 0.49 x 800 MJ = 392 MJ
The correct answer would be
Mile
The law of conservation of linear momentum says that when objects collide, the total initial momentum equals the total final momentum.
The momentum of a body is given by the product of mass and velocity of the object.
Answer:
1×10^2
Explanation:
Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the 10. If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.