A mild steel wire of length 1.0 m and cross-sectional area 0.50 × 10-2 cm2is stretched, well within its elastic limit, horizontally between two pillars. A mass of 100 g is suspended from the mid-point of the wire. Calculate the depression at the midpoint.

Q: - A simple camera telephoto lens consists of two lenses. The objective lens has a focal length f1 = ...

A: For the objective lens,

Q: Is temperature less than absolute zero possible ? If not, why?

A: Temperature is a measure of the kinetic energy of the molecules. As an object becomes colder, the co...

Q: A charge of +3*10^-6 c is located 21cm from a charge of -7*10^6  C.   what is the magnitude of the f...

A: Charge 1 (Q1) = 3×10-6 CCharge 2 (Q2) = -7×10-6 CDistance between both charge (d) = 21 cm = 0.21 m

Q: Can whole of work be converted into heat?Is the reverse true?

A: Click to see the answer

Q: On the basis of kinetic theory, explain why evaporation causes cooling?

A: During evaporation, a liquid turns into a gas by absorbing heat from the surroundings. The molecules...

Q: In the terms of kinetic theory of gases,explain why the pressure of a gas in a closed container incr...

A: The ideal gas equation is expressed as,

Q: Explain different type of stress.

A: There are two types of stress.Normal Stress : Caused due to normal forces (forces perpendicular to t...

Q: Why is it hotter at same distance over the top of fire than in front of it?

A: Whenever we put fire at a place, the air surrounding the fire gets heated up. As we know that hot ai...

Q: Choose the BEST answer to the following: The force needed to keep a ball tolling along a bowling all...

A: The ball rolling along a bowling alley is acted upon by the force of friction during its skid and ho...