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Rashid [163]
3 years ago
6

Select all that apply.

Physics
2 answers:
e-lub [12.9K]3 years ago
8 0

Answer:

From the Land to the atmosphere

From the atmosphere to space

Explanation:

Nana76 [90]3 years ago
3 0

Answer: It is both B and D

Select all that apply.

At night, thermal energy moves _____.

from space to the atmosphere

from the land to the atmosphere

from the atmosphere to the land

from the atmosphere to space

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Two for are at an angle at 120 ,the bigger forces is 40N and the resultant is perpendicular to the smaller one. find the smaller
Nadya [2.5K]

Answer:

smaller force is 20

Explanation:

Let, magnitude of the smaller force be F Newton.

Now, the resultant force makes an angle 90° with the smaller force. So, angle between resultant force and the larger force = (120° - 90°) = 30°.

So, tan 30° = (F * sin 120°) / (40 + F * cos 120°)

(1 / √3) = {F * (√3) / 2} / {40 + F * (- 1 / 2)}

80 - F = 3F

4F = 80

F = 20.

So, magnitude of smaller force is 20 Newtons.

3 0
2 years ago
A car battery with a 12 V emf and an internal resistance of 0.037 Ω is being charged with a current of 45 A. Note that in this p
matrenka [14]

Answer:

Part a)

V = 13.665 V

Part b)

P = 74.9 Watt

Part c)

P = 540 watt

Part d)

P_r = 0.878

Explanation:

Part a)

As we know that the during the charging process of the battery the terminal voltage of the cell is given as

V = E + iR

V = 12 + (0.037)(45)

V = 13.665 V

Part b)

Thermal energy dissipated in the battery is due to its internal resistance

so it is given as

P = i^2 R

here we have

P = 45^2 (0.037)

P = 74.9 Watt

Part c)

rate of energy conversion in the in the battery is given as

P = E. i

P = 12(45)

P = 540 watt

Part d)

percentage of the power conversion is given as

Pr = \frac{P_{out}}{P_{total}}

Pr = \frac{540}{540 + 74.9}

P_r = 0.878

6 0
3 years ago
What is it called when a skydiver is no longer accelerating downward?
raketka [301]

Explanation:

Once the force of air resistance is as large as the force of gravity, a balance of forces is attained and the skydiver no longer accelerates. The skydiver is said to have reached a terminal velocity.

4 0
3 years ago
Plzzzz helpppppppo Near the end of the life cycle of a star why does the star lose its size
gavmur [86]

Answer:

Because the energy is waning

Explanation: hope this helps

8 0
2 years ago
Why do we see the sun before it actually rises in the morning?
Lera25 [3.4K]

Answer:

It appears to rise and set because of the Earth's rotation on its axis. It makes one complete turn every 24 hours. It turns toward the east. As the Earth rotates toward the east, it looks like the sun is moving west.

Explanation:

6 0
3 years ago
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