Physics Questions and Answers
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
In the formation of sea breeze. wind blows from
sky to land
sea to sky
land to sea
sea to land
Correct answer is D
A sea breeze describes a wind that blows from the ocean (sea) inland towards land.
The thermopile is a device for detecting
radioactive radiations
radiant energy
x-rays
the presence of electrons
Correct answer is B
No explanation has been provided for this answer.
100.06 cm2
100.12cm2
100.24cm2
100.36cm2
Correct answer is C
Formula: A2 = A1(1 + βθ)
where β = The area expansivity
θ = Change in temperature.
β = 2α
where α = linear expansivity of the body.
⇒ β = 2 x 0.000017
= 0.000034 K−1
∴ A_2 = 100 (1 + (0.000034 x 70))
= 100(1 + 0.00238)
= 100(1.00238)
= 100.238 cm^2
= 100.24 cm^2 (to 2 d.p)
250.0s
25.0s
2.5s
0.5s
Correct answer is B
Force x Distance = Power x Time
Time = \frac{Force \times Distance}{Power}
= \frac{20 \times 500}{0.4 \times 1000}
= 25.0s