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zimovet [89]
2 years ago
8

01:39:21

Physics
1 answer:
choli [55]2 years ago
4 0

Explanation:

newtons third law of motion says

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The metal cover that seals the top of the cylinder
padilas [110]

Answer:a lid

Explanation bob pulled the lid off the jar of pickles

5 0
3 years ago
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A fan is to accelerate quiescent air to a velocity of 8 m/s at a rate of 9 m3 /s. determine the minimum power that must be suppl
ELEN [110]
Given:
ρ = 1.18 kg/m³, density of air
v = 8 m/s, flow velocity
Q = 9 m³/s, volumetric flow rate

The minimum power required (at 100% efficiency) is
\frac{1}{2} (8 \,  \frac{m}{s} )^{2}*(9 \,  \frac{m^{3}}{s} )*(1.18 \,  \frac{kg}{m^{3}}) =  339.84 \, W

The actual power will be higher because 100% efficiency is not possible.

Answer: 339.8 W (nearest tenth)
8 0
4 years ago
Which of the following accurately describe some aspect of gravitational waves? Select all that apply.
steposvetlana [31]
<h2>Answers:</h2>

-The first direct detection of gravitational waves came in 2015

-The existence of gravitational waves is predicted by Einstein's general theory of relativity

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<h2>Explanation:</h2>

Gravitational waves were discovered (theoretically) by Albert Einstein in 1916 and "observed" for the first time in direct form in 2015 (although the results were published in 2016).  

These gravitational waves are fluctuations or disturbances of space-time produced by a massive accelerated body, modifying the distances and the dimensions of objects in an imperceptible way.  

In this context, an excellent example is the system of two neutron stars that orbit high speeds, producing a deformation that propagates like a wave,<u> in the same way as when a stone is thrown into the water</u>. So, in this sense, gravitational waves carry energy away from their sources .

Therefore, the correct options are D, E and F.

5 0
4 years ago
an egg (0.05 kg) hits the ground at a speed of 10 m/s and cracks . what was the momentum of the egg when it hit?
Anastaziya [24]
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6 0
3 years ago
A bowling ball has a momentum of 12 units when it hits a bowling pin, with a momentum of 0 units. After hitting the bowling pin,
BARSIC [14]

<u>MOMENTUM IS CONSERVED</u>  (law of Nature)

That means that momentum can move from one object to another object, but it's never created or destroyed.  The amount of momentum AFTER something is the same as it was BEFORE.

<u></u>

<u>Before:</u>

(ball momentum = 12), (pin momentum = 0)

Ball + Pin = 12 unts

<u></u>

<u>After:</u>

Momentum is conserved.

Ball + Pin still has to be 12 units

Ball = 8 units

So Pin has to be the other <em>4 units</em>.

7 0
3 years ago
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