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Maksim231197 [3]
2 years ago
11

Hot coffee in a mug cools over time and the mug warms up. Which describes the energy in this system?

Physics
2 answers:
UNO [17]2 years ago
7 0

Answer:

<u>D</u>

Explanation:

where the heat transfers from coffee to mug.

Alex17521 [72]2 years ago
6 0
<span>The heat energy is being transferred between the two substances by thermal conduction. Because the hot coffee is at a different temperature to the mug, heat energy flows between them so that they reach thermal equilibrium, or the same temperature. This kind of heat transfer always happens from hotter temperatures to cooler temperatures.</span>
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7. Four perpendicular forces, 2 N, 3 N, 9 N and 10 N act on object P as shown in Diagram 2. 10 N A B 9 N 3 N 2 N P Diagram 2 Wha
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A

2

+B

2

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​

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o

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6 0
2 years ago
Block with m = 300 grams oscillates at the end of a linear spring with k = 6.5 N/m. (assume this is a top-down view and the bloc
masha68 [24]

Explanation:

Given that,

Mass of the block, m = 300 g = 0.3 kg

Linear spring constant, k = 6.5 N/m

(a) Let T is the period of the block's motion. It is given by :

T=\dfrac{2\pi}{\omega}

where

\omega=\sqrt{\dfrac{k}{m}}= angular frequency

Also, \omega=\sqrt{\dfrac{k}{m}}

T=\dfrac{2\pi}{\sqrt{\dfrac{k}{m}}}

T=\dfrac{2\pi}{\sqrt{\dfrac{6.5}{0.3}}}

T = 1.34 seconds

(b) The maximum acceleration of the block is, a_{max}=2\ m/s^2

The maximum acceleration is given by :

a_{max}=\omega^2A

A is the amplitude of the motion,

A=\dfrac{a_{max}}{\omega^2}

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A=\dfrac{ma_{max}}{k}

A=\dfrac{0.3\times 2}{6.5}

A = 0.09 meters

Hence, this is the required solution.

3 0
3 years ago
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