9√3ms-1 ·
6√3ms-1 ·
8√3ms-1 ·
9ms-1 ·
Correct answer is D
No explanation has been provided for this answer.
The physical quantity that has the same dimensions as impulse is
energy
momentum
surface tension
pressure
Correct answer is B
Impulse = F x t = m(v-u)
The velocity of a sound wave at 27oC is 360ms-1. Its velocity at 127oC is
120√3 ms-1
240 ms-1
240√3 ms-1
720√3 ms-1
Correct answer is C
Velocity \(\alpha \sqrt{temperature}\)
\(\frac{V_1}{V_2} = \sqrt{\frac{T_1}{T_2}}\)
therefore, \(\frac{360}{V_2} = \sqrt{\frac{27 + 273}{127 + 273}}\)
\(V_2 = 240\sqrt{3}\)m/s
450ms-1
400ms-1
300ms-1
250ms-1
Correct answer is C
F = ma
Therefore, a = \(\frac{F}{m}\)
a = \(\frac{7.5 \times 10^{3}}{0.025}\)
a = 3 x 105m/s2
using V2 = U2 + 2ax;
V2 = 02 + (2 x 3 x 105 x 0.15)
Therefore V = 300 m/s
I,II and lll only
ll,lll and lV only
l, II and lV only
l, ll, lll and lV
Correct answer is C
No explanation has been provided for this answer.