Answer:
Useful Output = 35 J
Explanation:
The useful energy output of the car must be equal to the difference between the total input energy supplied to the car and the energy wasted by the car:
Useful Output = Total Input - Waste
where,
Total Input = 120 J
Waste = 85 J
Therefore,
Useful Output = 120 J - 85 J
<u>Useful Output = 35 J</u>
Answer:
15.6 C
Explanation:
Here we are given a temperature in Fahrenheit (F). We want to convert it into Celsius degrees (C).
The conversion can be done by using the following equation:
where
T(C) is the temperature in Celsius degrees
T(F) is the temperature in Fahrenheit degrees
In this problem, we have
T(F) = 60 F
Therefore, by applying the equation,
Answer:
128.96J
Explanation:
Take g = 10m/s²
Ep = mgh
= 2.67 × 10 × 4.83 = 128.96 J
Answer:
7.75%
Explanation:
mass of climber, m = 55 kg
height, h = 701 m
Qc = 4.5 x 10^6 J (heat exhaused by the body)
Work = m x g x h
W = 55 x 9.8 x 701
W = 377839 J
W = QH - Qc
Where, QH is the heat input
QH = 377839 + 4.5 x 10^6
QH = 4877839 J
So, the efficiency
e = W / QH
e = 377839 / 4877839
e = 0.0774 = 7.75 %
Thus, the efficiency of the body is 7.75 %.
