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Dennis_Churaev [7]
3 years ago
8

A microwave oven uses 1,200 watts. It runs a total of 6 hours during the corse of a week. How much energy does the microwave ove

n use during the week?? a 4.8 kilowatt-hours. b 5.0 kilowatt-hours. c 7.2 kilowatt-hours. d 6.5 kilowatt-hours.
Physics
1 answer:
zzz [600]3 years ago
5 0

Answer:

7.2 kilowatts

Explanation:

Energy= power x time

where:

power = 1,200watts to kilowatts is 1.2kw

time = 6hours

therefore,

energy = 1.2kw x 6hrs

=7.2 kilowatts

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Reptile [31]

Answer:

31

Explanation:

Given:

U=3

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Substitute the given values to the equation:

3 + (4)(7)

3 + 28

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6 0
3 years ago
To lift a load of 100 kg a distance of 1 m an effort of 25 kg must be applied over an inclined plane of length 4 m. What must be
Troyanec [42]
Using conservation of energy law:-
∑ work in = ∑ work out
and work= force* displacement 
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we multiplied 100*1 = work out
so work in should be equal to 100*g Joules, where g is the acceleration due to gravity.
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by the same way:-
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work in = 100kg * 2m * g (m/s^2)= work out
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6 0
3 years ago
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A runner taking part in the 200 m dash must run around the end of a track that has a circular arc with a radius of curvature of
nlexa [21]

Answer:

a_c=1.44\ m/s^2

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Being v the tangent speed, and r the radius of curvature of the circle, then the centripetal acceleration is given by

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v=7.58\ m/s

Now we calculate the centripetal acceleration

\displaystyle a_c=\frac{7.58^2}{40}=1.44\ m/s^2

\boxed{a_c=1.44\ m/s^2}

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3 years ago
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It’s d all the other answer would not be a chemical property
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Shalnov [3]

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