1.8 x 10-4m
1.5 x 10-4m
1.2 x 10-2m
1.8 x 10-3m
Correct answer is C
No explanation has been provided for this answer.
The instrument used to view stars is the
Prism binoculars
Telescope
Film projector
Microscope
Correct answer is B
No explanation has been provided for this answer.
Which of the following statements is correct about a machine?
Efficiency of a machine is always greater than I
Efficiency decreases with an increase in friction
Velocity ratio depends on friction
Mechanical advantage increases with an increase in friction
Correct answer is B
No explanation has been provided for this answer.
I and II only
II and III only
I, II and III
I and III only
Correct answer is D
No explanation has been provided for this answer.
What happens to a water pool on a day when the humidity of the air is very low?
Temperature decreases
Slow evaporation
Temperature increases
Rapid evaporation
Correct answer is D
No explanation has been provided for this answer.
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