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Physics
GCSE

Explain why the stability of a car can be improved by widening the wheel base and lowering the centre of gravity.

A car will topple over when it is tilted so far that the line of action from the centre of gravity falls outside of the wheel base, causing a resultant moment around the side being tilted. Extending the b...

Answered by Tim H. Physics tutor
1507 Views

What is the equation linking Power, Time, and energy? and Calculate the work done by a cyclist when his power output is 200 W for 1800 seconds?.

The equation linking Power, Time, and Energy is:P=W/tAnd here P= 200 W, and t= 1800 sHence, W= 200*1800 = 360,000 JNB: Remember here, the SI units are important.

Answered by Othman A. Physics tutor
13708 Views

Why do rays of light change direction as they pass from air to a glass block?

Light travels as waves which have a distinct set of properties: a speed, a frequency and a wavelength. These properties are related to each other through the following equation: speed = frequency * wavele...

Answered by Lisa C. Physics tutor
13002 Views

Explain how red-shift provides evidence for the Big Bang theory.

Red-shift describes the phenomenon whereby the wavelength of light from a source increases as it travels through spacetime, hence observed as being 'shifted' to the red end of the spectrum (as red light h...

Answered by Abbie R. Physics tutor
10348 Views

Describe thermal conduction

Thermal conduction is one of three types of heat transfer. It occurs when 2 objects are in contact and have a difference in temperature. The kinetic energy is passed on from the warmer object to the coole...

Answered by Lakshan T. Physics tutor
1725 Views

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