Electric current can pass through………….
a) water
b) plasma
c) iron rod
d) all of these
Density:
The mass of a substance per unit volume is called……………….
a) density
b) stress
c) pressure
d) strain
Which of the following has high density value?
a) iron
b) gold
c) mercury
d) water
Explanation: Density of iron = 7900kg/m3
Density of gold= 19300kg/m3
Density of mercury = 13600kg/m3
Density of water = 1000kg/m3
………is denser than air.
a) CO2
b) polythene
c) ice
d) water
Explanation: Among all options only carbon dioxide is a gas and air is also a gas, the CO2 is more denser than air its density is 2.0kg/m3 while density of air is 1.3kg/m3.
Which liquid has high density?
a) water
b) mercury
c) petrol
d) both a & c
Explanation: Density of water = 1000kg/m3 Density of petrol = 800kg/m3
Density of mercury = 13600kg/m3
