Physics Answers

A car traveling at 4 m/s has 24,000 J of mechanical energy. The car accelerates to 8.2 m/s and increases its mechanical energy to 100,000 J. 

How much work was done to accelerate the car? 

What is the effective weight of a person of mass 75 kg carried vertically up in a rocket with an acceleration of 1.5g?

The expression of the electric field associated with an electromagnetic wave in vacuum is given by

E vector=(100vm^-1)z^sin(2π×10^8t+kx)

Determine the wave number, frequency, the direction of propagation and the magnitude and direction of the magnetic field associated with the wave.

The diameter of a 3.0m long solenoid is 0.80m. the magnetic at its centre is 0.80T.estimate the energy stored in the magnetic field of the solenoid.

A wire loop of resistance 20 ohm and radius 5.0cm is kept in the plane of this paper in a changing uniform magnetic field B vector.The direction of B vector is perpendicular to the plane of the page and points out of it. If the magnitude of the induced current in the loop is 3.0mA. determine the rate of change of the magnitude of the magnetic field B vector

Calculate the magnitude of magnetic intensity H vector and magnetic field B vector at the centre of a 2500 turn solenoid which is 0.50 m long and carries a current of 1.0A

Two positively charged particles each having charge 20microC,are kept at a distance of 2.0m from each other.determine the electric field due to each charge. Show the electric field vectors on an appropriate diagram

Using Gauss's theorem, calculate the flux of the vector field A vector=x³i^+x²zj^+yzk^ through the surface of a cube of side 2 units.

The radius of the Earth is 3.7 times the radius of the Moon, and the acceleration due to gravity on the surface of the Moon is 1/6 g, where g is the acceleration on the surface of the Earth. What is the mass of the Moon?

if a car passes four station with a constant acceleration the station are named a,b,c,and d initially at rest if Vi=2Vc, Vd=3Vc and the distance traveled from B to c is 200m. find the total distance traveled?