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Sketch a graoh of current against potential difference for a filament lamp and explain its shape.

(draw diagram on whiteboard) As the potential difference increases, the current increases, since V=IR (where V is the potential difference, I is the current and R is the resistance). Initially the current in...
TD
Answered by Tamanna D. • Physics tutor
2897 Views

The teacher quickly inverts the can containing boiling water into a bowl of cold water, as shown in the diagram. When the can is inverted in the cold water, the can collapses. Use ideas about particles and pressure to explain why the can collapses.

Initially the average kinetic energy of the trapped air within the can is much higher the surrounding body of air. However, when immersed in the cold water, there is a significant decrease in the average kin...
ZM
Answered by Zubin M. • Physics tutor
5071 Views

A particle of mass 5kg is acted upon by a force of 400N for a distance of 20m along the x axis. What is its final velocity if it is initally at rest?

The work done by a force on a particle is: Work done = Force x Displacement.The energy of a particle is given by the sum of its potential and kinetic energies.As the particle does not gain or lose any height...
LT
Answered by Luke T. • Physics tutor
2564 Views

A student has loaded a spring beyond its limit of proportionality. What does this mean?

The limit of proportionality is the is the point beyond which Hooke's law is no longer true when stretching a material.
AP
4796 Views

A cricket player throws a ball such that it travels 10 meters in 2 seconds at constant acceleration. Calculate the kinetic energy of the ball if it has a mass of 1kg.

This problem can be broken up into two steps:1) Finding the speed (velocity) of the ball2) Finding the kinetic energy.To find the speed we can use the equation shown: Speed= Distance/Time or in standard nota...
FM
Answered by Finn M. • Physics tutor
4802 Views