Molecular Physics | Thermodynamics Answers

The uniform bar weighs 45 N and is subjected to the forces as shown. Find the magnitude, location and direction of the force needed to keep the bar in equilibrium

Example:

A steel railroad track has a length of 30.000 m when the temperature is 0°C. What is its length on

a hot day when the temperature is 40.0°C? (b) Suppose the track is nailed down so that it

can’t expand. What stress results in the track due to the temperature change

A 200g of gas was heated from 50°C to around 120°C. The gas expanded in a piston-cylinder apparatus from 2.0L of initial volume to find a volume of 10.0L against an external pressure of 3.0 atm. Calculate for the change in the internal energy. The specific heat of water is 2.19 J/g×°C)

Considering the encircle part of the pumping system as shown below. Assuming a fresh water flowing in the discharge pipe with a velocity of 5 m/s.

Dynamic viscosity of oil used for lubrication between a shaft and a sleeve is 0.8Ns/m². The shaft is of d=0.5m and rotates at 190rpm. Calculate the horsepower lost in bearing for a sleeve length of 0.1m. Thickness of oil film is 2mm

An electron and a positron are moving side by side in the +x direction at 0.500c when they annihilate each other . Two photons are produced that moves along the x axis (a) Do both photons move in the +x direction ? (b) What is the energy of each photon

Assuming a velocity distribution which is a

parabola having its vertex 12 in from the boundary,

calculate the shear stress at y= 0, 3, 6, 9 and 12 inches.

Fluid’s absolute viscosity is 600 P

What do you understand by intensive and extensive variables of a system? state with reasons which of following variables are intensive and which are extensive ? (i) Number of gas molecules enclosed in a box (ii) density of a gas in a box (iii) wavelength of radiation emitted by a black body at temperature T(iv) intensity of radiation emitted by a black body at temperature T

Define viscosity discuss the effect of temperature and pressure on viscosity a

Water enters the heater at 30oC and leaves at 150oF, what is the temperature difference in oC?