15oC
18oC
22oC
24oC
Correct answer is C
\(\frac{4}{3}\) = \(\frac{sin30}{sinr}\)
r = 22oC
ii only
ii and iii only
i and iii only
i, ii, and iii only
Correct answer is C
No explanation has been provided for this answer.
17cm
20cm
25cm
100cm
Correct answer is C
F = \(\frac{uv}{u + v}\)
20 = \(\frac{100 \times v}{100 + v}\)
v = 25cm
\(\frac{V}{r}\) - 1
\(\frac{2V}{r}\) - 1
\(\frac{U}{r}\) - 1
\(\frac{2U}{r}\) - 1
Correct answer is B
F = \(\frac{r}{2}\) and v = mu
F = \(\frac{UV}{U + V}\)
\(\frac{r}{2}\) = \(\frac{U \times mu}{U + mu}\)
\(\frac{r}{2}\) = \(\frac{mu^2}{u(1 + m)}\)
\(\frac{r}{2} = \frac{mu}{1+m}\)
\(\frac{r}{2} = \frac{v}{1+m}\)
\(\frac{2v}{r} = 1+m\)
\(m = \frac{2v}{r} - 1\)
6.0 x 102ms-1
1.2 x 103km
3.0 x 103km
6.0 x 10 5km
Correct answer is D
Time = 1 x 4 x 10-3sec
distance = velocity x time
= 3 x 108 x 4 x 10-3
= 6 x 105m