Q. 74.2( 30 Votes )
Suggest a way to measure:
A. the thickness of a sheet of paper,
B. the distance between the sun and the moon.
Whole of them can be put together and tightened in book with the help of book-binder machine. the thickness is noted by slide calipers the figure divided by the number of sheet given the answer on thickness of each paper
Autonomous take usage of parallax to find distance between object much farther even than planets. To calculate the distance to a star, astronomers observe it from different places along earth orbit around the sun
By intensity of light from sun directly and that of light reflected by moon. At the time of eclipse, we can find the distance between earth and sun and distance between earth and moon then we subtract or add to get the distance Using the lunar year, earth year and distance between earth and moon
Rate this question :
The Vernier scale of a travelling microscope has 50 divisions which coincide with 49 main scale divisions. If each main scale division is 0.5 mm, calculate the minimum inaccuracy in the measurement of distance.Physics - Exemplar
The radius of a circle is stated as 2.12 cm. Its area should be written asHC Verma - Concepts of Physics Part 1
A physical quantity X is related to four measurable quantities a, b, c and d as follows:
X = a2 B3 c5/2 d-2
The percentage error in the measurement of a, b, c and d are 1%, 2%, 3% and 4%, respectively. What is the percentage error in quantity X ? If the value of X calculated on the basis of the above relation is 2.763, to what value should you round off the result.
Physics - Exemplar
It is claimed that two cesium clocks, if allowed to run for 100 years, free from any disturbance, may differ by only about 0.02 s. What does this imply for the accuracy of the standard cesium clock in measuring a time-interval of 1 s?NCERT - Physics Part-I
Express unified atomic mass unit in kg.Physics - Exemplar
Measure of two quantities along with the precision of respective measuring instrument is A = 2.5 m s–1 ± 0.5 m s–1 B = 0.10 s ± 0.01 s The value of A B will bePhysics - Exemplar
State the number of significant figures in the following:
A. 0.007 m2
B. 2.64 × 1024 kg
C. 0.2370 g cm–3
D. 6.320 J
E. 6.032 N m–2
F. 0.0006032 m2NCERT - Physics Part-I
Answer the following:
A. You are given a thread and a metre scale. How will you estimate the diameter of the thread?
B. A screw gauge has a pitch of 1.0 mm and 200 divisions on the circular scale. Do you think it is possible to increase the accuracy of the screw gauge arbitrarily by increasing the number of divisions on the circular scale?
C. The mean diameter of a thin brass rod is to be measured by Vernier callipers. Why is a set of 100 measurements of the diameter expected to yield a more reliable estimate than a set of 5 measurements only?NCERT - Physics Part-I