physics

The volume of a given mass of gas at 27ºC and 800 mmHg is 76cm². Calculate its volume at s.t.p.

A. 100.0 cm³ B. 72.8 cm³ C. 60.0 cm³ D. 36.4 cm³ Correct Answer: Option B B. 72.8 cm³ Explanation…

6 years ago

Highly polished silvery surfaces are?

A. poor absorbers and poor emitters of radiation B. poor absorbers and good emitters of radiation C. good absorbers and…

6 years ago

The magnitude of the expansion or contraction of a substance depends on _________?

i. temperature change ii. nature of the substance iii. size of the substance.  A. i and ii only B. ii…

6 years ago

Which of the following types of a thermometer is used for the calibration of other thermometers?

A. liquid-in-glass thermometer B. constant volume gas thermometer C. optical pyrometer D. thermocouple Correct Answer: Option B B. constant volume…

6 years ago

The velocity ratio of an inclined plane?

A. increases with increase in the angle of inclination B. increases with a decrease in the angle of inclination C.…

6 years ago

From Newton’s first law of motion, ________?

A. a body can only undergo translational motion B. once a body remains at rest no force acts on it…

6 years ago

The maximum displacement on either side of the equilibrium position of an object in simple harmonic motion represents?

A. period B. amplitude C. wavelength D. frequency Correct Answer: Option B B. amplitude

6 years ago

A body of mass 20g projected vertically upwards in vacuum returns to the point of projection after 1.2s. [g = 10ms‾²]. Calculate the speed of projection

A. 1.2ms‾² B. 6.0ms‾² C. 12.0ms‾² D. 0.6ms‾² Correct Answer: Option B B. 6.0ms‾² Explanation V = u - gt…

6 years ago