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3 years ago

Tell me plsquestion: one way to protect property from damage. (hurricane) (hurricane)

Physics

2 answers:

postnew [5]3 years ago

5 0

Answer:

hide on a place where there is no windows take a radio

Explanation:

Vsevolod [243]3 years ago

5 0

Close and lock all your windows.

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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:

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.

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

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 "Enter your answer in joules to four significant figures.":

W = 1884J

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3 years ago

While traveling along a highway a driver slows from 24 m/sec to 15 m/sec in 12 seconds. What is the

Vladimir [108]

24-15=9 m/s slower in 12 seconds. So 9/12 m/s² slower. Therefore the acceleration is -0,75 m/s²

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A transverse wave is moving toward the right in a uniform medium. Point X represents a particle of the uniform medium. Which dia

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After looking at the transverse waves in the diagram you listed above, the one diagram that does represent the direction of particle X at the instant show in diagram number 3. The direction of the wave motion is up. The correct answer choice will be 3.

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If the student hit a drum in his bedroom how would the sound wave behave differently than if he hit it in a swimming pool? Pleas

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The sound wave would behave differently in a swimming pool than in his bedroom because sound waves travel faster in more dense mediums; such as water. The wave will travel faster in water, and slower in air.

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3 years ago

Which of the following is right?

barxatty [35]

Scientific theory because it's a theory it's already an answer but it might change depending on the condition.

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3 years ago

Tell me plsquestion: one way to protect property from damage. (hurricane) (hurricane)​

Tell me plsquestion: one way to protect property from damage. (hurricane) (hurricane)