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Grade: 11
`        A pendulum clock is taken 1 km inside the earth from mean sea level. Then the pendulum clock	Loses 13.5 sec per day	Gains 13.5 sec per day	Loses 7 sec per day	Gains 7 sec per day​​​​​Pls provide the answer with appropriate method and along with calculation and also explain step by step ...pls `
2 years ago

## Answers : (1)

Vikas TU
8853 Points
```							At sea level,gravitational constant that isg = GM/Rand Time period,T = 2pi*root(l/g)at below 1 km,g’ = GM/(R-1000)T’ = 2pi*root(l/g’)T/T’ = root(g’/g) = > root(R/(R-1000))T’ = T/ root(R/(R-1)) => T/root(6400/6399) = > T/root(1.000156274) => T/1.000078134orT’ = 0.999921872*Tputting value of T for appropriaate T we getT’ approx 13.6 seconds.
```
2 years ago
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