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klemol [59]
2 years ago
10

If a cup of coffee is at 90°C and a person with a body temperature of 36°C touches it, how will heat flow between them?

Physics
2 answers:
Alex73 [517]2 years ago
3 0
B: from the cup to the hand. 
Katena32 [7]2 years ago
3 0

Answer:

From the cup to the hand.

Explanation:

Note that heat flows from the region of higher temperature to a region of lower temperature.

If a cup of coffee is at 90°C and a person with a body temperature of 36°C touches it, therefore the heat flow will be from the coffee(higher temperature) to the body at 36°C. This is due to the temperature gradient i.e difference in temperature of the two bodies.

The heat from the coffee will be transmitted to the hand.

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A Swinging Monkey A 8.72 kg monkey is hanging by one arm from a branch and swinging on a vertical circle. As an approximation, a
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Answer:

Centripetal force, F = 66.36 N

Explanation:

Given that,

Mass of the monkey, m = 8.72 kg

The radial distance between the branch and the point where the monkey's mass is located to be 84.1 cm, r = 84.1 cm

The speed of the monkey, v = 2.53 m/s

We need to find the  magnitude of the centripetal force acting on the monkey. It is given by :

F=\dfrac{mv^2}{r}\\\\F=\dfrac{8.72\times (2.53)^2}{84.1\times 10^{-2}}\\\\F=66.36\ N

So, the magnitude of the centripetal force acting on the monkey is 66.36 N.

4 0
3 years ago
In Which figure below is the trend line drawn correctly
saul85 [17]

Answer:  

<em>The first graph is the trend line. </em>

Explanation:

<u>Trend Line </u>

It's a line indicating the tendency of something being measured or evaluated. The trend line is meant to represent an approximation of a set of points of a measured magnitude.  

We have three possible 'trend lines' to choose from. The second is not a line, so it's not the correct option. The third is not a line either, it's just a graph who joins all the measured points. It doesn't mark a trend.

The first graph is a trend line because it's a single line and can be used to represent the whole set of values  .

5 0
3 years ago
Part of the solar radiation entering the atmosphere about ___ actually reaches the earth's surface
Dmitry [639]

Answer:

48%

Explanation:

The earth's temperature has to be stable and this is the reason for the presence of incoming and outgoing heat. Of the solar energy reaching the atmosphere, about 29% is bounced back as reflected radiation by clouds, snow and particles in the atmosphere, about 23% is absorbed by the atmosphere and about 48% actually gets to the earth surface.

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2 years ago
a man is pulling a block with a mass of 6.2kg across a horizontal surface and accelerates the block at a rate of 0.50m/s.the coe
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Mg = 6.2 x 9.81 = 60.822 This is also normal force. Coefficient of friction times normal force is the force due to friction: 60.822 x 0.24 = 14.6N F = MA so F(your force) - F(friction) = 6.2 x 0.5 = 3.1 Your answer is 3.1+ 14.6 I hope this is correct though I might be wrong.
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2 years ago
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A 5.5kg mass is pushed with a force of 31N across a table having μk of 0.350. Find how fast it will accelerate, taking friction
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Answer:

3.66m/s^2

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