First law of motion
Second law of motion
Third law of motion
Law of universal gravitation
Correct answer is A
Newton's First law of motion describes the straight motion of a body.
Which of the following characteristics of a wave is used in the measurement of the depth of the Sea?
diffraction
interference
refraction
reflection
Correct answer is D
Depth of sea can be measured by echo, a reflected sound waves.
Which of these is observed when air is pumped out of a discharge tube without lowering its pressure
the conductivity of the air increases
the conductivity of the air decreases
conduction does not occur
spark are produced
Correct answer is C
Conduction takes places in gases when air is pumped out of a discharged tube under reduced pressure.
2000.25 cm\(^3\)
200.025 cm\(^3\)
4003.27 cm\(^3\)
2010.25 cm\(^3\)
Correct answer is A
m = 0.354g, T\(_1\) = 273°C = 273 + 273 = 576K
P\(_1\) = 114cmHg, V\(_1\) = 2667cm\(^3\) at STP
T\(^2\) = 273K, P\(_2\) = 76cmHg, V\(_2\) = ?
| P\(^1\)V\(^1\)
T\(^1\) |
= | P\(^2\)V\(^2\)
T\(^1\) |
| V\(_2\) | = | 114 × 2667 × 273
76 × 576 |
= | 2000.25cm\(^3\) |
1 : 4
4 : 1
1 : 1
2 : 1
Correct answer is C
θA = 2θ\(_{B}\),
| m\(_A\) | = | 1
2 |
m\(_B\) |
H = MCθ
m\(_A\)c\(_A\)θ\(_A\) = m\(_B\)c\(_B\)θ\(_B\)
( 1/2 m\(_B\))C\(_A\) (2θ\(_B\)) = m\(_B\)c\(_B\)θ\(_B\)
| C\(_A\)
C\(_B\) |
= | 1
1 |
⇒ 1 : 1