Question
For the given data, n=10, X̅ = 20, Y̅ = 40,
∑(X-5)^2 = 100, ∑(Y-20)^2 =160 and ∑(X-5)*(Y-20) = 80. Calculate the correlation coefficient and comment on the validity of dataSolution
A car increases its speed from 20 m/s to 60 m/s in 8 seconds. Find its acceleration.
A wire is stretched by a force such that it experiences a strain of 2 x 10-3. If Young’s modulus of the material is 2 x 1011 Pa,...
When an electric current flows, electrons move from:
Two point charges +q and −q are separated by a distance 2a. The electric field at a point on the perpendicular bisector at distance r from center is p...
What is the effect of a magnetic field on a current carrying conductor?
If n resistors with R Ω each as resistance are connected in parallel, then the equivalent resistance of the network is:
The electric and magnetic fields of an electromagnetic wave are _____________
The surface tension of water on adding detergent to it –
A machine does 600 J of work in 2 minutes. Find its power.
The phenomenon of interference is based on the principle of:
