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wariber [46]
4 years ago
9

The heat pump is designed to move heat. This is only possible if certain relationships between the heats and temperatures at the

hot and cold sides hold true. Indicate the statement that must apply for the heat pump to work.A. Q_{\rm h} < Q_{\rm c} and T_{\rm h} < T_{\rm c}.B. Q_{\rm h} > Q_{\rm c} and T_{\rm h} < T_{\rm c}.C. Q_{\rm h} < Q_{\rm c} and T_{\rm h} > T_{\rm c}.D. Q_{\rm h} > Q_{\rm c} and T_{\rm h} > T_{\rm c}.
Physics
1 answer:
Pie4 years ago
7 0

Answer:

There are no answer chooses to this question

Explanation:

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What is the electric force acting between two charges of -0.0045 C and -0.0025 C that are 0.0060 m apart? Use Fe=kq1q2/r^2 and k
oksano4ka [1.4K]

Answer:

D. 2.8 × 10⁹ N

Explanation:

The force between two charges is directly proportional to the amount of charges at the two points and inversely proportional to the square of distance between the two points.

Fe= k Q₁Q₂/r²

Q₁= -0.0045 C

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r= 0.0060 m

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Fe= (9.00 × 10 ⁹ Nm²/C²×-0.0045 C×-0.0025 C)/0.0060²

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4 years ago
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A small glass bead has been charged to +20 nC. A small metal ball bearing 1.0 cm above the bead feels a 0.018 N downward electri
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Answer:

q=1\times10^{-8}C

Explanation:

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Distance between them, d = 1 cm = 0.01 m

By use of Coulomb's law in electrostatics

F=\frac{KQq}{d^{2}}

By substituting the values

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Explanation:

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if you were to draw a 3rd harmonic of a tube open at both ends, what would you draw at the ends of the tube?
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A 3rd harmonic of a tube open at both ends will have displacement antinodes at both ends.

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2 years ago
I don’t understand this please help.
ruslelena [56]
I couldnt type it out so here's a picture
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