a washing machine takes 1200 j total, but it only uses 840 j to function. what is the efficiency of the…
a washing machine takes 1200 j total, but it only uses 840 j to function. what is the efficiency of the washing machine? ? % hint : efficiency = \\frac{usable e}{total e} \\cdot 100
Answer
Explanation:
Step1: Identify usable and total energy
Usable energy ($\text{usable E}$) = 840 J, Total energy ($\text{total E}$) = 1200 J.
Step2: Apply efficiency formula
Using the formula $\text{Efficiency} = \frac{\text{usable E}}{\text{total E}} \cdot 100$, substitute the values: $\text{Efficiency} = \frac{840}{1200} \cdot 100$
Step3: Calculate the fraction and multiply by 100
First, simplify $\frac{840}{1200} = 0.7$. Then multiply by 100: $0.7 \cdot 100 = 70$.
Answer:
70