In what range of temperature is the expansion of water anomalous?
+208\(^o\)C to +212\(^o\)C
-80\(^o\)C + -76\(^o\)C
0\(^o\)C to +4\(^o\)C
-4\(^o\)C to +0\(^o\)C
Correct answer is C
No explanation has been provided for this answer.
4
\(\frac{\pi}{2}\)
\(\frac{1}{4}\)
2
Correct answer is D
In a simple pendulum, T = 2\(\pi\)\(\sqrt{\frac{L}{g}}\)
\(\frac{T_1}{T_2} = \sqrt{\frac{L_1}{L_2}}\) but L\(_2\) = 4L\(_1\)
\(\frac{T_1}{T_2} = \sqrt{\frac{L_1}{4L_1}}\)
T\(_2\) = 2T\(_1\)
0.5 ms\(^{-1}\)
1.5 ms\(^{-1}\)
1 ms\(^{-1}\)
2ms\(^-1\)
Correct answer is C
Gun Momentum = bullet momentum
M\(_a\)V\(_a\) = M\(_b\)V\(_b\)
5 x V\(_a\) = 0.05 x 100
V\(_a\) = 1m\(^{-1}\)
\(\frac{mv^2}{r}\)
\(\frac{mr^2}{x}\)
\(\frac{mr}{v}\)
\(\frac{mv}{r^2}\)
Correct answer is A
No explanation has been provided for this answer.
convection
osmosis
capillarity
diffusion
Correct answer is D
Diffusion is the tendency of molecules to migrate and fill an empty space due to their random thermal motions.
in diffusion, the diffusing molecules move from the places where their concentration high to places where their concentration is low.