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2 years ago

A clock which has brass pendulum beats correctly at 30C will it run faster or slower if temperature increase or decrease

Physics

1 answer:

Dominik [7]2 years ago

7 0

Answer:

We know that the period of a pendulum is written as:

T = 2*pi*√(L/g)

where:

g = gravitational acceleration = 9.8m/s^2

pi = 3.1415...

L = length of the pendulum, in this case, is the length of the brass pendulum.

Now, we know that the brass dilates when the temperature increases.

Then if the temperature increases, the value of L will increase, which means that the period T will also increase, because L is in the numerator of T.

If the period increases the complete motion of the pendulum needs more time, this would mean that the clock will run slower.

If the temperature decreases, the opposite occurs, the value of L decreases, and then the period also decreases, which means that the clock will run faster.

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How much heat is needed to melt 13.74 kg of silver that is initially at 20°C?

salantis [7]

Answer:

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Explanation:

As we know that melting point of silver is

T = 961.8 degree C

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now we will have

$Q = ms\Delta T + mL$

$\Delta T = 961.8 - 20$

$\Delta T = 941.8 degree C$

now from above equation

$Q = (13.74)(240)(941.8) + (13.74)(111 \times 10^3)$

$Q = 3.1 \times 10^6 + 1.53 \times 10^6$

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2 years ago

A rope exerts a 280 N force while pulling an 80 Kg skier upward along a hill inclined at 12o. The rope pulls parallel to the hil

user100 [1]

Answer:

The speed of the skier after moving 100 m up the slope are of V= 25.23 m/s.

Explanation:

F= 280 N

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N= 163 Newtons

Fr= μ * N

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d= a * t² / 2

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A clock which has brass pendulum beats correctly at 30C will it run faster or slower if temperature increase or decrease​

A clock which has brass pendulum beats correctly at 30C will it run faster or slower if temperature increase or decrease