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Physics
A Level

Explain the forces involved in a pendulum set up.

Just as the pendulum is released, the pendulum ball is at its maximum acceleration. The force due to gravity (weight) is acting vertically downwards, giving it a force component acting perpendicular to th...

Answered by Physics tutor
1412 Views

Why do I keep losing marks on 6 markers?

My best tips for you are: 1.) make sure you have 6 DIFFERENT points; a good way to keep each point clear is to write in bullet points instead of paragraphs (you can always write more than 6 if you think t...

Answered by Felix N. Physics tutor
1319 Views

Derive an expression for wave speed in terms of wavelength and frequency.

The general expression for speed is speed=distance/time.The wavelength (lambda) of a wave is the distance between one point on an oscillation to the exact same point on the next oscillation, or more simpl...

Answered by Muhammed R. Physics tutor
2687 Views

How do I derive Kepler's 3rd law using Newton's Law of gravitation, in the case of a circular orbit?

Kepler's 3rd law states that the cube of the radius, r from a planet is directly proportional to the square of the orbital period around it, T: r3 ∝ T2 (this is the result we want!)<...

Answered by Greta C. Physics tutor
3633 Views

Given the rate of thermal energy transfer is 2.7kW, the volume of the water tank is 4.5m^3, the water is at a temperature of 28oC, density of water is 1000kgm-3 & c=4200Jkg-1K-1. Calculate the rise in water temperature that the heater could produce in 1hr

The equations needed to solve this problem are outlined below. E = mc(T2 - T1) d = m/v P = E/tYou first need to work out the mass of the water. m = 1000 x 4.5 = 4500kg You then need ...

Answered by Jasmine B. Physics tutor
1325 Views

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