unstable
stable
neutral
cannot be determined
Correct answer is B
No explanation has been provided for this answer.
20m
40m
80m
160m
Correct answer is C
H = \(\frac{1}{2} gt^2\)
\(\frac{1}{2} \times 10 \times 4^2 = 80\)
The time of flight for a projectile motion is given by the expression
\(\frac{U sin \theta}{g}\)
\(\frac{U sin \theta}{2g}\)
\(\frac{2U sin \theta}{g}\)
\(\frac{U sin 2\theta}{g}\)
Correct answer is C
No explanation has been provided for this answer.
4.5 ms-1
15.0 ms-1
15.5 ms-1
51.7 ms-1
Correct answer is C
Av. speed = \(\frac{3 \times 15 + 3 \times 10 + 4 \times 20}{3 + 3 + 4}\)
= 15.5 ms\(^{-1}\)
Which of the following substances is the most volatile at room temperature?
water
diesel
petrol
kerosine
Correct answer is C
No explanation has been provided for this answer.