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guapka [62]
3 years ago
8

Define light yearend explain how and why light years are used to measure distances in the universe

Physics
1 answer:
yan [13]3 years ago
3 0
Light years are the distance light can travel in a full year. They are used because there are really big distances in the universe that are easier to measure with a really large form of measurement (light years).
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If two objects are in thermal equilibrium, do they have the same thermal or internal energy?
Tpy6a [65]

Answer:

Yes, they do have the same internal energy.

Explanation:

The thermal balance refers to when there is no heat transfer between the bodies and their surroundings i.e. the bodies and the environment are at the same temperature.

Suppose two bodies of different masses and different materials, each one of them is at a temperature of 25(° C), which is the same temperature as the temperature of the environment, if these two bodies are close to each other, there is also heat transfer as they are at the same temperature, in the absence of any type of energy that enter or exit in these bodies, the amount of internal energy will be equal in both bodies.

Note: when the internal energy of one of these bodies is increased, heat transfer will happen, always looking for the thermal balance.

7 0
3 years ago
Cell with structures labeled A, B, and C
sveticcg [70]
The answer is A. :)
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3 years ago
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A 120 V potential difference is applied to a space heater that dissipates 674 W during operation. (a) What is its resistance dur
Annette [7]

Answer:

(a) 21.36 ohms

(b) 5.62 A

Explanation:

Parameters given:

Potential difference, V = 120 V

Power, P = 674 W

(a) Power is given as:

P = V²/R

Where R is resistance

=> R = V²/P

R = 120²/674

R = 14400/674

R = 21.36 ohms

(b) Power is also given as:

P = I*V

Where I = Current (time rate of flow of Electric charge)

=> I = P/V

I = 674/120

I = 5.62 A

6 0
3 years ago
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At the first Democratic Party convention of 1860, fifty Southern delegates refused to vote and left the convention. voted to sec
marysya [2.9K]

Answer:

A) refused to vote and left the convention.

Explanation:

At the first Democratic Party convention of 1860, fifty Southern delegates <u>refused to vote and left the convention </u>

3 0
3 years ago
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What is the imaginary line that runs from the geographic north to south pole?
alisha [4.7K]
The imaginary lines that run from the north to the south are called longitudinal lines.
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3 years ago
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