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3 years ago

9. How does water pollution contribute to water shortages?

Physics

1 answer:

Grace [21]3 years ago

8 0

Answer:

<h2>if the chemicals seep into the groundwater or in underground aquifers.</h2><h2 />

Explanation:

<h3>One of the largest causes of water scarcity across the world is pollution. ... Pesticides and other fertilizer use by farmers can also lead to water pollution if the chemicals seep into the groundwater or in underground aquifers. The misuse of water resources is another massive issue that leads to water scarcity.</h3>

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Which action can be explained by physics

Serjik [45]

Walking to school. Hope this helps!

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3 years ago

Read 2 more answers

Consider a motor that exerts a constant torque of 25.0 nâ‹…m to a horizontal platform whose moment of inertia is 50.0 kgâ‹…m2. A

Crazy boy [7]

Answer:

W = 1884J

Explanation:

This question is incomplete. The original question was:

<em>Consider a motor that exerts a constant torque of 25.0 N.m to a horizontal platform whose moment of inertia is 50.0kg.m^2 . Assume that the platform is initially at rest and the torque is applied for 12.0rotations . Neglect friction. </em>

<em> How much work W does the motor do on the platform during this process? Enter your answer in joules to four significant figures.</em>

The amount of work done by the motor is given by:

$W=\Delta K$

$W= 1/2*I*\omega f^2-1/2*I*\omega o^2$

Where I = 50kg.m^2 and ωo = rad/s. We need to calculate ωf.

By using kinematics:

$\omega f^2=\omega o^2+2*\alpha*\theta$

But we don't have the acceleration yet. So, we have to calculate it by making a sum of torque:

$\tau=I*\alpha$

$\alpha=\tau/I$ => $\alpha = 0.5rad/s^2$

Now we can calculate the final velocity:

$\omega f = 8.68rad/s$

Finally, we calculate the total work:

$W= 1/2*I*\omega f^2 = 1883.56J$

Since the question asked to "<em>Enter your answer in joules to four significant figures.</em>":

W = 1884J

3 0

3 years ago

Weight is measured in units called

Aleksandr-060686 [28]

Pounds

If you are talking about the unit of measurement for weight is that of force it would be Newtons.

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3 years ago

What are the effects of noise?

slega [8]

Answer:

Noise making has led to loss on hearing.

Explanation:

Supposing you like engaging in parties because of the noise of the sound system it can cause loss on hearing if continued for long

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4 years ago

Why do you think more people give importance to their body than their mind?

tekilochka [14]

Answer:

More people give more importance to their body because they want to be liked and fit in. They would rather fail in school and mess up their education to show off their body to be one of those cool kids in school.

Explanation:

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3 years ago