0.33
0.50
0.67
0.90
Correct answer is D
= \(\frac{2}{3}\)(0.5)\(^3\)
Mass of liquid displaced = mass of floating cube = 75kg
Density of liquid = \(\frac{mass}{volume}\)
= \(\frac{75}{(\frac{7}{3(0.5)})}\) × 3
= 0.9 × 103kgm\(^{-3}\)
R.D of liquid = \(\frac{(0.9 )}{(1.0)}\) × 103
= 0.9
Which of the following concepts is not an evidence of the particles nature of matter?
Diffusion
Brownian motion
Diffraction
Esterification
Correct answer is D
Diffusion is the net movement of molecules/atoms from a region of high concentration to low concentration.
Brownian motion is the erratic random movement of microscopic particles in a field.
Diffraction is the various phenomena that occur when a wave encounters an obstacle.
The product of force and time is?
Impulse
Momentum
Inertia
Friction
Correct answer is A
An impulse is equal to the net force on the object times the time period over which this force is applied. Impulse is derive from the equation F = ma, which comes from Newton's second law of motion
Temperature is the property of a body which is proportional to the ____.
total kinetic energy of its molecules
average kinetic energy of its molecules
average speed of its molecules
maximum speed of its molecules
Correct answer is B
The last postulate of the kinetic molecular theory states that the average kinetic energy of a gas particle depends only on the temperature of the gas. Thus, the average kinetic energy of the gas particles increases as the gas becomes warmer
What flows to the positively charged conductor by connecting it to the earth?
Electrons
Ion
Neutron
Proton
Correct answer is A
Earth acts as a ground of zero potential. So when a positively charged conductor is connected to the earth, positive charge flows into the earth and as a result, electrons flow from earth to the conductor.