50.0m
28.8m
18.0m
8.0m
Correct answer is D
Convert velocity from \(kmh^{-1}\) to \(ms^{-1}\), by multiplying \(\frac{1000}{3600}\),
\(72 \times \frac{1000}{3600}\) = \(20ms^{-1}\)
Therefore, distance covered in 0.4s = \(20 \times 0.4 = 8m\)
I
II
III
IV
Correct answer is B
No explanation has been provided for this answer.
A chemical balance is used for measuring
volume
mass
thickness
density
Correct answer is B
It is a type of beam balance with great precision, and it can pick up the slightest mass placed on it.
Which of the following processes is not a surface phenomenon?
Condensation
Evaporation
Photo Emission
Thermionic Emission
Correct answer is A
No explanation has been provided for this answer.
2.0N
3.0N
3.5N
7.0N
Correct answer is A
Upthrust = weight of liquid displaced
= mass of liquid displaced \(\times\) acceleration due to gravity
= \(\frac{200}{1000} \times 10\)
= 2N
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