I and II only
I and III only
II and III only
III and IV only
Correct answer is C
Increase in pressure generally raises the boiling point but but lowers the melting point. II and III
30°
25°
15°
10°
Correct answer is D
Electricity heat energy supplies by the heater = lvt = 3.5 x 200 x (2 x 60) = 84000j.
and this heat is supplied to the 2 kg of the water MC ∆ t = 84000
2 x 4200 x ∆ t = 84000
∴ ∆t = (84000)/8400 = 10°c
∴ increase in temp. of water = 10°c
I only
II only
I and II only
II and III only
Correct answer is B
Using the liquid of high volume expansively II only
A clinical thermometer is different from other mercury in glass thermometers owing to
the constriction on its stem
the grade of mercury used in it
its long stem
its wide range of temperatures
Correct answer is A
No explanation has been provided for this answer.
5.0 x 10-2 ms-2
4.5 x 10--2 ms-3
2.5 x 10-2 ms-8
2.0 x 10-2 ms-3
Correct answer is C
With in the air = 250N
wt. in the liquid = 200N
loss in wt. in the liquid = 250 - 200 = 50N
∴ Wt. the liquid of equal vol. of the iron = 50N
∴If the density of the liquid is 1000 lgm-3
then the volume of the liquid = (N)/D = V = (25kg)/1000 =0.025m3 = 2.5 x 10-2 m8.