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Inga [223]
3 years ago
8

(a) How much gravitational potential energy (relative to the ground on which it is built) is stored in an Egyptian pyramid, give

n its mass is about 8 ✕ 109 kg and its center of mass is 34.0 m above the surrounding ground?.
Physics
1 answer:
Rom4ik [11]3 years ago
3 0

Answer:

2.66832\times10^{12}

Or

2,668,320,000

Explanation:

Potential energy is given as the product of mass, acceleration due to gravity and height.

PE=mgh

Where m is the mass of pyramid, g is acceleration due to gravity and h is height at any point.

In reference to the earth, we substitute h for 34.0 m and g with 9.81 m/s2 then taking m as 8000000000 kg we get that

PE=mgh=8000000*9.81*34.0=2,668,320,000 J

In scientific notafion, this is expressed as 2.66832\times10^{12}

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zalisa [80]

Answer:

Total time taken=110 seconds

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Explanation:

First of all, we find the total time taken:

For that, we use the formula : Distance/Speed= Time

Time for part 1 : 200/5=40 seconds

Time for part 2 : 280/4=70seconds

Total time taken=110 seconds

Total distance traveled=480m

Average Speed= 480/110=4.36 m/s

Total displacement=200-280=-80m (Since this is displacement, we need to find the distance between the initial and final point. Also, I've taken east direction as positive and west as negative)

Average Velocity=-80/110=-0.72 m/s

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Distance traveled by the ball is given by

distance = speed \times time

here we know that

speed = 20 m/s

times = 0.25 s

now we have

distance = 20 \times 0.25

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3 years ago
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ANEK [815]

Answer:

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Answer:

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Explanation:

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Substituting the numbers into the equation, we find

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