85.0oC
80.0oC
75.0oC
70.0oC
Correct answer is C
\(\frac{175 - 25}{225 - 25} = \frac{x - 0}{100 - 0}\)
\(\frac{150}{200} = \frac{x}{100}\)
\(x = \frac{150 \times 100}{200}\)
= 75°C
7.2kg
33.2kg
43.2kg
53.2kg
Correct answer is C
R.d = \(\frac{\text {density of petrol}}{\text{density of water}}\)
0.72 = \(\frac{\text{density of petrol}}{1000}\)
Density of petrol =720kgm3
mass of petrol = 720 x 60 x 10-3
=43.2kg
1.0 x 104Nm-2
2.0 x 103Nm-2
1.5 x 103Nm-2
1.0 x 103Nm-2
Correct answer is D
Density of liquid = \(\frac{1 {\times} 10^3}{2.5 {\times} 2 {\times} 4}\)
= 50kgm3
pressure heg = 50 x 10 x \(\frac{4}{2}\)
= 1 x 103Nm-2
A piece of wire gauze can be made to lie on water because
the wire guaze is less dense than water
the water molecules repels the wire guaze upwards
the water surface has the effect of an elastic thin skin
of the cohensive forces between the water and the wire guaze molecules
Correct answer is C
No explanation has been provided for this answer.
1000 N
700 N
110 N
10 N
Correct answer is D
Volume of water displaced = volume of cube
therefore, 0.1 x 0.1 x 0.1 = 0.001m3
mass of H2O = 0.001 X 1000
= 1kg
upthrust = mg
= 1 x 10
=10N