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Lostsunrise [7]
3 years ago
13

The device is 50% efficient. Which equation is correct? A input energy = useful output energy ÷ 2 B useful output energy =wasted

output energy ÷ 2 C wasted output energy = useful output energy D wasted output energy = useful output energy ÷ 2
Physics
1 answer:
ozzi3 years ago
8 0

Answer:

C - wasted output energy = useful output energy

Explanation:

Useful output + wasted output ALWAYS equals input energy. If the device is 50% efficient, that means that 50% of the input energy is converted into useful output energy, and 50% is converted to wasted output energy. The wasted output energy is equal to the useful output energy.

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P waves and S waves are alike in that they __________.
sammy [17]
<h3><u>Answer;</u></h3>

travel through solids

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<h3><u>Explanation;</u></h3>
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3 0
3 years ago
Read 2 more answers
Someone help please.....
Westkost [7]

Answer:

0.0928km/min (4dp)

Explanation:

To find the jogger's speed in km per minute, we just need to divide the number of km jogged by the time in minutes it took to jog that distance. This will give us the distance they jogged every minute which is their speed.

4km in 32 minutes:

4/32 = 0.125km/min

2km in 22 minutes:

2/22 = 0.091 (3dp)km/min

1km in 16 minutes:

0.0625km/min

Now to find the average speed of these 3 speeds, we just add them all together and divide by how many values there are (3 values).

Average (mean)  = \frac{0.125+0.091+0.0625}{3}

Average = 0.2785/3

Average speed of jogger = 0.0928 (4dp) km/min

Hope this helped!

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3 years ago
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zubka84 [21]
You can tell by making sure that the lights are unplugged and tighten lights then plug it in if I didn't work it's burnt :) hope it works
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