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3 years ago

Can somebody plz help me

Physics

1 answer:

iragen [17]3 years ago

4 0

Answer:

Technically, humans are causing global warming.

Explanation:

There's some research done into this (sadly not enough), some of which can be found here, https://www.nationalgeographic.com/environment/global-warming/global-warming-causes/ and here, https://climate.nasa.gov/causes/ . The basics are as follows: Earth is a greenhouse. Sunlight comes towards us, and while some is reflected out, most is absorbed through greenhouse gasses, like Carbon Dioxide. Because of humanity, the amount of carbon dioxide in the air has increased, leading to more warmth from the sun to be absorbed. Therefore, the earth is getting warmer because of us.

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The flywheel of an engine has moment of inertia 2.50 kg m2 about its rotation axis. What constant torque is required to bring it

MrRissso [65]

Answer:

Explanation:

From the question we are told that

The moment of inertia is $I = 2.50 \ kg \cdot m^2$

The final angular speed is $w_f = 400 rev/min = \frac{400 * 2\pi}{60} = 41.89 \ rad/s$

The time taken is $t = 8.0 s$

The initial angular speed is $w_i = 0\ rad/s$

Generally the average angular acceleration is mathematically represented as

$\alpha = \frac{w_f - w_i }{t}$

=> $\alpha = \frac{41.89}{8}$

=> $\alpha = 5.24 \ rad/s^2$

Generally the torque is mathematically represented as

$\tau = I * \alpha$

=> $\tau = 5.24 * 2.50$

=> $\tau = 13.09 \ N \cdot m$

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3 years ago

Which materials are the best thermal insulators?

MrMuchimi

I think that the answe is gasses.

8 0

3 years ago

Read 2 more answers

What's 600,000,000 divided by 3,000.000,000,000?

Murljashka [212]

Answer:0.000002

Explanation: I Looked It Up lol

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3 years ago

Skid Marx set the world record for acceleration as he went from zero to 10 m/s in 3 seconds. How far did he travel in that time?

iren [92.7K]

Answer:

12000 miles per hour

Explanation:

If skid Marx went from zero to 10 miles in 3 seconds the his speed would have been 12000 miles per hour.

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3 years ago

Heather drops a ball weighing 0.50kg a distance of 2.0m. If the speed of the ball right after it bounces is the same speed of th

ki77a [65]

The speed of the ball just before impact was v=√(2gh) = 6.26m/s. The acceleration is twice this over the time (twice because the second speed is the same in the other direction, meaning the total change in speed is 2V)
a = 12.52/0.10 = 125.2m/s²
The force is F=ma, so F = 0.5kg·125.2m/s² = 62.6N

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3 years ago