Homework Statement
A copper wire of diameter 2.00mm carries a current of 0.50A.The number of conducting electrons per metre cube of copper is 8.00 x 10^28.
a)Calculate the drift velocity of the conducting electrons.
b)What is the number of conducting electrons in 10.0cm length of the wire...
I read from my book work done by gas is positive sign and work done on gas is negative sign.
I read through the information on internet,it states that work done by gas is negative and work done on gas is positive.I am confusing now.Please explain to me.Thank you.
Homework Statement
At 100°C and pressure of 1.01 x 10^5 pa,1.00kg steam occupies a volume of 1.67m^3.The volume of 1.00kg water is 1.04 x 10^-3 m^3.the specific latent heat of vaporisation of water at 100°C is 2.26 x 10^6 J kg^-1.When 1.00kg water changes into steam at 100°C and pressure of...
Homework Statement
The door of an oven has a piece of glass of dimensions 20cm X 30 cm and thickness 0.50cm.when the interior of the oven is at temperature 200°C,determine the quantity of heat that flow through the glass in one hour.(for glass,K=0.80 Wm^-1K^-1)
Homework Equations...
Homework Statement
The fundamental frequency of a vibrating stretched string of length 1.0m is 256Hz.When the string is shortened to 0.4m with the same tension,the fundamental frequency now become
how many Hz?
Homework Equations
The Attempt at a Solution
Homework Statement
The elastic limit for a type of material is 1.6 x 10^8 Pa.Determine the minimum diameter if a wire which is made of this material so that it can support a load of 100N without the stress exceeding the elastic limit.
Homework Equations
elastic limit=stress...
Physics calculation about waves?
A wave traveling along a string is described by y(x,t)=0.00327sin(72.1x-2.72t)in which the numerical constants are in SI units (0.00327m,72.1radm^-1,and 2.72rads^-1)
A)What is the amplitude of this wave?
B)What are the wavelength,period and frequency of this...