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Shalnov [3]
3 years ago
8

I NEED SOMEOME TO HELP MEEEE NOWWWW I WILL GIVE YOU. 75 POINTSSSS

Physics
1 answer:
nirvana33 [79]3 years ago
5 0
Hold on I’m working on it Rn
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Describe how excavations are done.
Mazyrski [523]

Answer:

It includes earthwork, trenching, wall shafts, tunneling and underground

Explanation:

4 0
3 years ago
An ideal gas in a piston is placed in a refrigerator, which removes 413 J of energy from the gas via cooling. The plunger on the
maria [59]

Answer:

The net change in the internal energy of the gas in the piston is -343J

Explanation:

Because heat and workdone are the only means of energy transfer between the system and the surrounding, change in internal energy is given by;

∆E = q + w

q = heat transfer

w = workdone

Because heat is lost by the system, the heat transfer is negative

q = -413J

Because work is done on the system, workdone is positive

w = +70J

∆E = -413J + 70J

∆E = -343J

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3 years ago
Alternating current changes the ____ of the current flow
Anuta_ua [19.1K]

Answer:

Direction

Explanation:

There are two types of electric current:

- DC (Direct current): in a direct current, the direction of the flow of the current is constant; this means that it does not change. This means that the potential difference supplied has always the same direction, so that the electrons travel always in the same direction through the circuit

- AC (Alternating current): in an alternating current, the direction of the flow of the current is constantly reverses. This means that the direction of the potential difference supplied constantly changes, therefore the electrons travel half the time in one direction and half the time in the opposite direction.

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4 years ago
According to the big bang theory, the universe is continually getting
oee [108]
The answer on Edge would be (A.)= Larger and Cooler ! I'm doing the same thing as y'all. Good luck everyone.

7 0
3 years ago
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A 95 kg clock initially at rest on a horizontal floor requires a 650 n horizontal force to set it in motion. after the clock is
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The μs between the clock and floor is 650(M*g) and the μk between the clock and the floor is 560(M*g)
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3 years ago
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