An object which is 3cm high is placed vertically 10cm in front of a concave…
An object which is 3cm high is placed vertically 10cm in front of a concave mirror. If this…
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A light wave of frequency 5 x 1014Hz moves through water which has a refractive…
A light wave of frequency 5 x 1014Hz moves through water which has a refractive index of (frac{4}{3}).…
A wave disturbance travelling in air enters a medium in which its velocity is less…
A wave disturbance travelling in air enters a medium in which its velocity is less than that in…
Which of the following conditions will make water boil at a temperature of 100oC when…
Which of the following conditions will make water boil at a temperature of 100oC when the atmospheric pressure…
Which of the following statements? i. land and sea breezes are natural convection currents. ii….
Which of the following statements? i. land and sea breezes are natural convection currents. ii. convection may occur…
A bar of initial length /0 is heated through a temperature change (Delta)t to a…
A bar of initial length /0 is heated through a temperature change (Delta)t to a new length I.…
The pressure of a gas when cooled at constant volume will decrease because the molecules
The pressure of a gas when cooled at constant volume will decrease because the molecules A. collide less…
1kg of copper is transferred quickly from boiling water to a block of ice. Calculate…
1kg of copper is transferred quickly from boiling water to a block of ice. Calculate the mass of…
40m3 of liquid is mixed with 60m3 of another liquid Q. If the density of…
40m3 of liquid is mixed with 60m3 of another liquid Q. If the density of P and Q…
The resistances of platinum wire at the ice and steam points are 0.75 ohm and…
The resistances of platinum wire at the ice and steam points are 0.75 ohm and 1.05 ohm respectively.…