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lesya [120]
4 years ago
14

For each of the

Physics
1 answer:
maksim [4K]4 years ago
6 0

Explanation:

a) Hammer hits a nail

Action: Hammer hitting the nail

Reaction: Nail Hitting the hammer.

B) . Earth's gravity pulls down on a book.

Action: Earth pull downward on the book.

Reaction: The Book pull's the Earth Upward.

C) A helicopter blade pushes  air downward.

Action: Blade push air downward

Reaction: The force in pushes the helicopter upward.

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If the period of the wave is 0.34 seconds what would be the frequency of the wave
Leokris [45]

Answer:

3 every second

Explanation:

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3 years ago
A circuit has an AC voltage source in series with a 50 ohm resistor and a 113 mH inductor. The frequency is 100 cycles/sec, and
user100 [1]

Answer:

Explanation:

The rms voltage = 140/√2 = 140/1.414 = 99 V.

Reactance of inductor  = wL = 2 X 3.14 X 100 X 113 X 10⁻³ =70.96 ohm.

Total resistance in terms of vector = 50+70.96j

j is imaginary unit  number

Magnitude of this resistance = √ 50² + 70.96² = 86.80 ohm

current in resistance (rms) ( I ) = 99/86.80 = 1.14 A.

Power dissipated in resistor = I² R = 1.14 X 1.14 X 50 = 65 W( approx)

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4 years ago
Why Ice Is Slippery?
goldfiish [28.3K]
Because ice is less dense than liquid water,
its melting point is lowered under high pressures.

A long standing theory says that this is what causes ice to be slippery:

As you step on it, the pressure of your weight causes the top layer to my into water.
3 0
3 years ago
Read 2 more answers
What does properties mean
OleMash [197]

Answer:

a thing or things belonging to someone; possessions collectively.

Explanation:

7 0
3 years ago
What event, which occurs twice a year when the sun crosses Earth's equator, recently
andrey2020 [161]

Answer:

<u>the autumnal equinox (when day and night are of equal length)</u>

<u>Explanation:</u>

The first event occurs around the 22nd or 23rd in the month of September. What usually happens is that regions around the Northern Hemisphere (which includes all of North America and Europe) experience an equal length of day and night.

While the second event occurs around March 20th or 21st mainly observable in countries found in the Southern Hemisphere.

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