1.15 x 104s
1.15 x 103s
4.6 x 104s
4.6 x 103s
Correct answer is D
Heat supplied = Heat gained
pt = ml
T = \(\frac{ml}{p}\)
= \(\frac{2 \times 2.3 \times 10^6}{1000}\)
= 4.6 x 10\(^3\) sec
room temperature
boiling point
freezing point
standard temperature
Correct answer is B
Liquid boils when its saturated vapor pressure is equal to the (external) atmospheric pressure.
I.e. Boiling point at 100°c
4.28 kg
42.86 kg
1.02 kg
7.14 kg
Correct answer is C
Energy supplied bythe heater = heater gained by water
pt = MCAθ
1000 x 300 = m x 4200(100 - 30)
m = (1000 x 300)/4200 x 70 = 1.02 kg
At 4°c, the volume of a fixed mass of water is?
constant
minimum
maximum
zero
Correct answer is B
Anomalous expansion of water is at temperature ranges 0°c to 4°c u. water contract when heated from 0°c to 4°c. thus the volume of water is least at 4°c
The thermometer whose reading is indicated by a change in color of its thermometric property is the?
bi-metalic strip thermometer
thermocouple
platinium resistance thermometer
optical pyrometer
Correct answer is D
A pyrometer is instrument for measuring high temperature.
The optical pyrometer is one in which the luminous radiation from the hot body is compared with that from a known source.