A ....................... (stopwatch/wristwatch) is used to measure the exact time between the start and stop of an event.

Carbon dating is useful for measuring age of a fossil/ article between

In measuring time period of a pendulum, it is advised to measure the time between consecutive passage through the mean position in the same direction. This is said to result in better accuracy than measuring time between consecutive passage through an extreme position. Explain.

Which of the following factor was used by Alfred Sturtevant to measure the distance between the genes and mapped their pasition on the chromosome

The manometer shown below is used to measure the difference in water level between the two tanks. Calculate this difference for the conditions indicated.

A simple pendulum is being used to determine the value of gravitational acceleration g at a certain place. The length of the pendulum is 25.0 cm and a stop watch with 1 s resolution measures the time taken for 40 oscillations to be 50 s. The accuracy in g is:

A wall clock uses a vertical spring mass system to measure the time. Each time the mass reaches an extreme position, the clock advances by a second. The clock gives correct time at the equator. If the clock is taken to the poles it will

A steel tape is correctly calibrated at 20^(@)C and is used to measure the length of a table at 30^(@)C . Find the percentage error in the measurement of length. [alpha_(steel) = 11 xx 10^(-5)//.^(@)C]

The distacne between the genes on the chromosomes sis measured by using

A voltmeter with a resistance 50 xx 10^(3) Omega is used to measure voltage in a circuit. To increase its range to 3 times, the additional resistance to be put in series is

A conveyor belt is moving with constant speed of 6 m//s . A small block is just dropped on it.Coefficient of friction between the two is mu = 0.3 . Find (a) The time when relative motion between them will stop (b) Displacement of block upto that instant (g = 10 m//s^(2)) .