Advertisements
Advertisements
Question
The size of bacteria is 1 µ. Find the number of bacteria present in 1 m length.
Advertisements
Solution
Size of a bacteria = 1 µ
Since 1 µ = 10-6 m
∴ Number of the particle = Total length/size of one bacteria
= 1 m/10-6 m
= 106
APPEARS IN
RELATED QUESTIONS
Name the part of the vernier callipers which is used to measure the following
Internal diameter of a mug
State one use of a screw gauge.
Which of the following measures a small length to high accuracy : metre rule , vernier callipers or screw gauge?
A screw gauge has 50 divisions on its circular scale and its screw moves by 1 mm on turning it by two revolutions. When the flat end of the screw is in contact with the stud, the zero of the circular scale lies below the base line and 4th division of the circular scale is in line with the base line. Find
(i) The pitch,
(ii) The least count and
(iii) The zero error of the screw gauge
The circular scale of a screw gauge has 50 divisions. Its spindle moves by 2 mm on the sleeve, when given four complete rotations calculate
- pitch
- least count
A measuring cylinder is filled with water up to a level of 30 ml. A solid body is immersed in it so that the level of water rises to 37 ml. Now the solid body is tied with a cork and then immersed in water so that the water level rises to 40 ml. Find the volume of the solid body and the cork.
In the following figure, the pitch of the screw is 1 mm. Calculate:
(i) the least count of screw gauge and
(ii) the reading represented in the figure.
The main scale reading while measuring the thickness of a rubber ball using Vernier caliper is 7 cm and the Vernier scale coincidence is 6. Find the radius of the ball.
