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nikklg [1K]
3 years ago
13

HELPPPPPPPPPPP PLEASE 25 points!!!!

Physics
1 answer:
Contact [7]3 years ago
7 0
This simply states that energy cannot be created or destroyed, it can only be transferred from one form to another. ... This dissipated heat energy cannot be regained in a useful form. Fuels. A fuel releases energy when it undergoes a chemical reaction.
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7. Which of the following has the most total mechanical energy?
maria [59]

Answer:

An airplane flying

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8 0
3 years ago
A 0.150-kg metal rod carrying a current of 15.0 A glides on two horizontal rails 0.510 m apart. If the coefficient of kinetic fr
djyliett [7]

Answer:

B = 0.0307 T = 30.74 mT

Explanation:

Given

m = 0.150 kg

I = 15.0 A

d = 0.510 m

μk = 0.16

B = ?

Balancing the forces on the rod in the <em>j</em> direction

N - m*g = 0   ⇒   N = m*g

and in the <em>i</em> direction

I*d*B - μk*N = 0     ⇒      B = μk*N / (I*d)

⇒      B = μk*m*g / (I*d)

⇒      B = (0.16)*(0.150 kg)*(9.8 m/s²) / (15.0 A*0.510 m)

⇒      B = 0.0307 T = 30.74 mT

6 0
3 years ago
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