You have designed a machine that requires 1000 J of work from a motor for every 800 J of useful work done by the machine. What i
s the efficiency of the machine?
1 answer:
Answer:
80%
Explanation:
800 / 1000 = 0.8
Efficiency = 0.8 *100 = 80%
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Answer:B
Explanation:
Because chemical energy fuels your body with energy so without it u wont have enough energy to move.
Answer and Explanation:
Here's the answer!
3.5 seconds is 3500 milliseconds.
Answer:
176,000 N
Explanation:
Newton's second law:
∑F = ma
F = (4 × 40,000 kg) (1.1 m/s²)
F = 176,000 N
It would take more energy to reheat 12 cups because only 1 or 2 cups can fit in a microwave rather an than brewing 12 cups in a coffee pot.
