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2 years ago

14

If you rub a balloon on a piece of fabric or carpeting and then hold it against your head, your hair can stand on end. Why does

this happen?

1 answer:

blagie [28]2 years ago

7 0

AS Hitler once said, Static Electricity my dear watson

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What is the sound intensity level in a car when the sound intensity is 0.525 μW/m2 ? Use I0 = 1.00×10−12 W/m2 for the reference

never [62]

Answer:

The sound intensity level in the car is 57.2 dB.

Explanation:

Sound intensity level in decibels, β = 10 log (I/I₀); where I = 0.525 × 10⁻⁶ W/m², I₀ = 1.0 × 10⁻¹² W/m²

β (dB) = 10 log ((0.525 × 10⁻⁶)/(1.0 × 10⁻¹²)) = 10 × 5.72 = 57.2 dB

Hope this Helps!!!

8 0

3 years ago

Which letter (A, B, or C) shows where you should apply the most effort to lift the stone?

sergij07 [2.7K]

A becuz its at da it dont got no wa

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2 years ago

Which of the following is most needed for cosmotologists to study the age of the universe

Hatshy [7]

If its not Distance traveled then its energy

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3 years ago

Hardness and density are physical properties.<br> a. True<br> b. False

antiseptic1488 [7]

a . true hardness and density are physical properties

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2 years ago

Read 2 more answers

A 48 kg cart is sitting motionless at the top of the hill. At what height, did the cart start at, to reach 88435 J of energy at

svet-max [94.6K]

Answer : The height is 188 meters

Explanation : When the cart reached at the end from top of hill then the cart have potential energy .

Given that,

Potential energy = 88435 J

Mass of cart = 48 kg

We know that,

The potential energy is

$mgh =88435$

$h= \dfrac{88435}{48\times9.8}$

$h = 187.9 = 188\ meters$

So, the height of the top is 188 meters.

7 0

3 years ago