Define : Least count

Define leaf.

In a experiment the angle are required to be measured using an instrument. 26 divisions of the main scale exactly coincide with the 30 divisions of the vernier scale . If the smallest division of the main scale is half -a-degree (=0.5^(@)) then the least count of the instrument is .

A student measures the value of g with the help of a simple pendulum using the formula g = (4pi^(2)L)/(T^(2)) . He measures length L with a meter scale having least count 1 mm and finds it 98.0 cm . The time period is measured with the help of a watch of least count 0.1s . The time of 20 oscillations is found to be 40.4 s. The error Deltag in the measurment of g is (" in" m//s^(2)) .

Define- Heat.

Define : Moderator.

Define : Vibration

Define stem.

Define seed.

Define Loudness

The side of an object measured by means of a vernier callipers is 3.52 cm. If the least count of the vernier is 0.01 cm,estimate the percentage error in the measurement.