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The distance of a galaxy is 5·6 × 1025 m . Assuming the speed of light to be 3 × 108 `"ms"^-1`. Find the time taken by light to travel this distance .
[Hint : `"Time taken" = "Distance travelled"/"speed"`]
The time period of a simple pendulum is 2 s. What is its frequency? What name is given to such a pendulum?
A student calculates experimentally the value of density of iron as 7.4 gcm−3. If the actual density of iron is 7.6 gcm−3, calculate the percentage error in the experiment.
Calculate the time period of a simple pendulum of length 1.44 m on the surface of the moon. The acceleration due to gravity on the surface of the moon is 1/6 the acceleration due to gravity on earth, [g = 9.8 ms−2]
Length of the second’s pendulum is 100 cm. Find the length of another pendulum whose time period is 2.4 s.
Which of the following do not affect the time period of a simple pendulum?
- mass of bob
- size of bob
- effective length of pendulum
- acceleration due to gravity
- amplitude.
What do you understand by the term constant of proportionality?
Which of the following is not a unit of distance?
Complete the rollowing:
1 light year= ________ m
