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Assoli18 [71]
3 years ago
7

An iron Tyre of diameter 50cm at 288k is to be shrank on to a wheel of diameter 50.35cm.To what temperature must the tyre be hea

ted so that it will slip over the wheel with a radial gap of 0.5mm.Linear expansivity of iron is 0.000012k-1
​
Physics
1 answer:
hichkok12 [17]3 years ago
8 0

Answer:

The answer should be D

Explanation:

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ratio between m/v

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Suppose that Superman wants to stop Earth so it does not rotate. He exerts a force on Earth at Earth's equator tangent to its su
MatroZZZ [7]

Answer:

F = 3.514 * 10^{19}N

Explanation:

We know that torque exerted by superman is given by:

T = F_s * R_t = I_t * \alpha_t   where It is earth's inertia, and αt is earth acceleration.

The inertia of a solid sphere is calculated as:

I_t = \frac{2}{5}*m_t*R_t^2

Earth's acceleration is:

\omega_f = \omega_o + \alpha_t * t

Where t is the lapse of 1 year. t = 365*24*3600 = 31536000s

\omega_f = 0    \omega_o = \frac{2*\pi}{24h * 3600s/h}

Solving for the acceleration and replacing the values:

\alpha_t = \frac{\omega_f - \omega_o}{t} Replacing this value on the torque equation:

F_s = \frac{2}{5} m_t * R_t*\frac{2\pi}{365*(24*3600)^2} =3.514*10^{19}N

6 0
4 years ago
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