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Draw the electric field lines produced by a negative point charge and calculate the electric field strength at a distance of 50mm from a point charge of size -30nC.

The diagram should show a negative point charge with the electric field lines pointing towards the point charge. The separation of the lines should decrease as you get closer to the point charge. The line...

Answered by Jemima B. • Physics tutor

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What is the difference between the centripetal acceleration and the centrifugal force?

The centripetal acceleration is the acceleration a body experiences in centripetal motion (moving in a circle or along an arc). Centripetal acceleration always points towards the centre of the circle, hen...

Answered by Luca L. • Physics tutor

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Using Newton's law of universal gravitation, show that T^2 is proportional to r^3 (where T is the orbital period of a planet around a star, and r is the distance between them).

(Lets consider a simple planetary system composed of a planet orbiting a star. the gravitational force between the two is given by F=(GMm)/(r²). Assuming the planet also moves in a circular orb...

Answered by Karanvir S. • Physics tutor

22294 Views

What is the difference between a longitudinal and a transverse wave?

Waves that go up and down in a curvy shape like you would draw on a piece of paper are called transverse waves. Scientifically, these are when the particles move in a direction that is perpendicular (90) ...

Answered by Sarah F. • Physics tutor

9352 Views

What is the stress in a cylindrical rod of 10.0cm diameter when loaded by 50.0N force at each end?

Stress = Force/Area and cross sectional area of a cyclinder = pi.r²
As diameter = 10.0cm=0.1m r=0.05m so area = 3.14*0.05²= 0.00785m²
As the force is 50.0N the...

Answered by Rowan H. • Physics tutor

2946 Views