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DerKrebs [107]
3 years ago
14

A television that is 83% efficient provides 4 600) of useful energy. How much energy

Physics
1 answer:
choli [55]3 years ago
4 0

Answer:

Total energy consume will be equal to 5542.175 j

Explanation:

We have given efficiency of the television is 83% = 0.83

Now it is given that useful energy is 4600 joule

We have to find the total energy consume

We know that efficiency is equal to ratio of  useful energy to total energy consume

So 0.83=\frac{4600}{total \ energy \ consume }

total energy consume =  5542.175

So total energy consume will be equal to 5542.175 J

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A truck hits a brick wall with a force of 100000 kg ms² the truck comes to a stop in 0.5 s what is the impulse
vladimir1956 [14]

Answer:

Impulse = 50,000 J

Explanation:

Given: force = 100,000 kg ms^2 or N; time = 0.5 s

Unknown: impulse = ?

Equation: impulse = (force)(time)

Substitute: impulse = (100,000 kg ms^2 or N)(0.5 s)

Solution: impusle = 50,000 kg ms^2 or J

4 0
3 years ago
the crust is the thinnest layer on Earth, which allowed it to have a more constant theory of its composition. how do you think s
OlgaM077 [116]

Answer:

Explanation:

Geologists record the seismic waves and study how they travel through Earth. The speed of these seismic waves and the paths they take reveal how the planet is put together. Using data from seismic waves, geologists have learned that Earth's interior is made up of several layers.

3 0
3 years ago
By what percent does the braking distance of a car decrease, when the speed of the car is reduced by 10.3 percent? Braking dista
likoan [24]

The braking distance is the distance traveled by a car experiencing a braking force until it comes to rest.

Our initial energy is solely kinetic:
E_i = \frac{1}{2}mv^2

And, since the car goes to rest, it is no longer in motion. It will have no kinetic energy.
E_f = 0

Therefore, there was work done by the braking force.

W_B = E_f - E_i = -\frac{1}{2}mv^2

Recall the definition of work:
W = F\cdot \Delta x

Or in this case, since the displacement and breaking force are antiparallel:
W = -F_B\Delta x

This is equivalent to the dissipation of kinetic energy:
W = -F_B\Delta x = -\frac{1}{2}mv^2

Now, to visualize this, let's rearrange the equation to solve for displacement.

\Delta x =\frac{mv^2}{2F_B}

<u>There is a direct, SQUARE relationship between necessary braking distance speed. </u>

If the speed was reduced by 10.3 percent, its new speed is only 89.7% percent of the original, so:
\Delta x' =\frac{m(0.897v)^2}{2F_B}

\Delta x' = 0.8046\Delta x

The reduction by a percentage is:
1 - 0.8046 = 0.1954 \\\\\boxed{= 19.54\%}

6 0
2 years ago
A garbage truck has a mass of 2100 kg. It starts from rest and travels 75 meters in 15 seconds. The truck uniformly accelerates
Ivanshal [37]

Answer: F=(2100)(0.33)=693N

Explanation:

3 0
3 years ago
A.complete the following sentences with your own result or condition
ludmilkaskok [199]

1. If I hadn't bought that car yesterday.

2. I would have never bought the tickets for today..

3. She wouldn't have gotten suspended.

4. We could've worked on our project.

5. but I was in the shower.

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