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PtichkaEL [24]
3 years ago
13

If the temperature of the conductor is increased, the electrons’ speeds decrease

Physics
1 answer:
Tatiana [17]3 years ago
5 0

Answer:

HOPE IT HELPS YOU!!!

Explanation:

Mark FadedGirl25 as brainliest

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A runner has a temperature of 40°c and is giving off heat at the rate of 50cal/s (a) What is the rate of heat loss in watts? (b)
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Answer:

(a)  209 Watt

(b) 4482.8 seconds

Explanation:

(a) P = 50×4.18

Where P = rate of heat loss in watt

    P = 209 Watt

Applying,

Q = cm(t₁-t₂)................ Equation 1

Where Q = amount of heat given off, c = specific heat capacity capacity of human, m = mass of the person, t₁ and t₂ = initial and final temperature.

From the question,

Given: m = 90 kg, t₁ = 40°C, t₂ = 37°C

Constant: c = 3470 J/kg.K

Substtut these values into equation 1

Q = 90×3470(40-37)

Q = 936900 J

But,

P = Q/t.............. Equation 2

Where t = time

t = Q/P............ Equation 3

Given: P = 209 Watt, Q = 936900

Substitute into equation 3

t = 936900/209

t = 4482.8 seconds

5 0
3 years ago
A rod of length 30.0cm has linear density (mass per length) given by
jeka94

The distance from the center of mass is as shown in the image:

<h3>What is the center of mass?</h3>
  • The center of mass, sometimes referred to as the balancing point in physics, is the only location where the weighted relative position of the distributed mass accumulates to zero.
  • Here is where a force can be applied to produce a linear acceleration without also producing an angular acceleration. When calculations in mechanics are made about the center of mass, they are frequently made simpler. It is a fictitious location where one can suppose that an object's full mass is concentrated to see its motion.
  • In other words, to apply Newton's equations of motion, the center of mass is the particle equivalent of the provided item.

To learn more about the Center of mass, refer to:

brainly.com/question/8662931

#SpJ4

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Two bodies A and B with 8 Kg and 24 kg respectively move
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It’s a speed of 15 m/s so it would be their velocities after collision
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