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grigory [225]
3 years ago
5

Which statements represent convection? Select two options.

Physics
2 answers:
Elina [12.6K]3 years ago
8 0

Answer:

-The movement of air in a hot-air balloon makes it rise into the sky.

-A house has high heating bills because the heat ends up in the attic.

please mark as brainliest

Explanation:

I got the question right

Morgarella [4.7K]3 years ago
4 0
C would be the answer to that
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4 years ago
15) A 328-kg car moving at 19.1 m/s in the +x direction hits from behind a second car moving at 13 m/s in the same direction. If
kolbaska11 [484]

Answer:

Explanation:

Given that,

Mass of first car

M1= 328kg

The car is moving in positive direction of x axis with velocity

U1 = 19.1m/s

Velocity of second car

U2 = 13m/s, in the same direction as the first car..

Mass of second car

M2 = 790kg

Velocity of second car after collision

V2 = 15.1 m/s

Velocity of first car after collision

V1 =?

This is an elastic collision,

And using the conservation of momentum principle

Momentum before collision is equal to momentum after collision

P(before) = P(after)

M1•U1 + M2•U2 = M1•V1 + M2•V2

328 × 19.1 + 790 × 13 = 328 × V1 + 790 × 15.1

16534.8 = 328•V1 + 11929

328•V1 = 16534.8—11929

328•V1 = 4605.8

V1 = 4605.8/328

V1 = 14.04 m/s

The velocity of the first car after collision is 14.04 m/s

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Wood has chemical energy, which can be used to generate thermal and radiant energy when burned in a fireplace. Which best explai
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C

Explanation: i took the test

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4. A billiard ball rolls from rest down a smooth ramp that is 8.0 m long. The
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Answer:

Explanation:

The formula S=(at^2)/2 will be used during the entire explanation.

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t = 2.8 s

iii. 2s

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Hope you understand)

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3 years ago
(AKS 1c) A bowler rolls a bowling ball with a speed of 4 m/s. It took 2s to reach the pins at the end of the lane. What is the f
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Answer:

B is the answer

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When A is divided by 7x, it multiplies to0.81

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