3 years ago

Help will mark as brainliest

Physics

2 answers:

notsponge [240]3 years ago

8 0

Answer:

Explanation:

I used this and passed my test! good luck!

Bumek [7]3 years ago

7 0

Answer: i guess d is the correct answer

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Fill in the blank with the correct response.

viktelen [127]

Answer:

the answer is portfolio

Explanation:

7 0

3 years ago

A flat roof is very susceptible to wind damage during a thunderstorm and/or tornado. If a flat roof has an area of 500 m2 and wi

Evgesh-ka [11]

Answer: The magnitude of the force exerted on the roof is 490522.5 N.

Explanation:

The given data is as follows.

Below the roof, $v_{1}$ = 0 m/s

At top of the roof, $v_{2}$ = 39 m/s

We assume that $P_{1}$ is the pressure at lower surface of the roof and $P_{2}$ be the pressure at upper surface of the roof.

Now, according to Bernoulli's theorem,

$P_{1} + 0.5 \times \rho \times v^{2}_{1} = P_{2} \times 0.5 \rho \times v^{2}_{2}$

$P_{1} - P_{2} = 0.5 \times \rho \times (v^{2}_{2} - v^{2}_{1})$

= $0.5 \times 1.29 \times [(39)^{2} - (0)^{2}]$

= $0.645 \times 1521$

= 981.045 Pa

Formula for net upward force of air exerted on the roof is as follows.

F = $(P_{1} - P_{2})A$

= $981.045 \times 500$

= 490522.5 N

Therefore, we can conclude that the magnitude of the force exerted on the roof is 490522.5 N.

5 0

3 years ago

Kepler's third law is founded on a mathematical formula that is based on the inverse relationship between a planet's orbital vel

Cloud [144]

Kepler's third law is founded on a mathematical formula that is based on
the inverse relationship between a planet's orbital velocity and its distance
from the sun.

4 0

4 years ago

Read 2 more answers

Which statement is true?

ser-zykov [4K]

D is definitely the correct choice here.

I think a case could also be made for choice-B, but that would be a tough, complex operation.

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3 years ago

Free fall the object with less air resistance falls with a greater acceleration true or false

Nikitich [7]

False is the correct answer

6 0

4 years ago

Help will mark as brainliest ​

Help will mark as brainliest