Physics

The area of cross-section of a steel wire (Y=2.0×10¹¹ N/m²) is 0.1 cm².

The area of cross-section of a steel wire (Y=2.0x10¹¹ N/m²) is 0.1 cm². The force required to double its length…

Shearing stress causes change in

Shearing stress causes change in Options (a) Length (b) Breadth (c) Shape (d) Volume Correct Answer: Shape Explanation: No explanation…

A black body radiates 20 W at temperature 227⁰C. It temperature of the black body

A black body radiates 20 W at temperature 227⁰C. It temperature of the black body is changed to 727⁰C, then…

If the radius of star is R and it acts as a black body, what would be the temperature

If the radius of star is R and it acts as a black body, what would be the temperature of…

Water rises in a vertical capillary tube up to a height of 2.0 cm.

Water rises in a vertical capillary tube up to a height of 2.0 cm. If the tube is inclined at…

The total radiant energy per unit area, normal to the direction of incidence

The total radiant energy per unit area, normal to the direction of incidence, received at a distance R from the…

Heat is flowing through a rod of length 50 cm and area of cross-section 5 cm².

Heat is flowing through a rod of length 50 cm and area of cross-section 5 cm². Its ends are respectively…

A liquid wets a solid completely. The meniscus of the liquid in a sufficiently long

A liquid wets a solid completely. The meniscus of the liquid in a sufficiently long tube is Options (a) Flat…

A black body at 227⁰C radiates heat at the rate of 7cals/cm²s. At a temperature

A black body at 227⁰C radiates heat at the rate of 7cals/cm²s. At a temperature of 727⁰C, the rate of…

The two ends of a rod of length L and a uniform cross-sectional area

The two ends of a rod of length L and a uniform cross-sectional area A are kept at two temperatures…