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Physics
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What is the difference between a scalar and a vector?

As often described, a vector is a quantity that has a magnitude and a direction, whereas a scalar just has a magnitude. The easiest way to thing about it is to physically think if you could point in a dir...

Answered by Pavit B. • Physics tutor
3748 Views

A particle that moves uniformly in a circular path is accelerating yet moving at a constant speed. Explain this statement.

Acceleration is a change in velocity over time. Velocity is different to speed, because it has a direction (for example a car moving at 10 mph along a road heading north will have a greater ve...

Answered by Anna L. • Physics tutor
15448 Views

A model truck A of mass 1.2 kg is travelling due west with a speed of 0.90 m/s . A second truck B of mass 4.0 kg is travelling due east towards A with a speed of 0.35 m/s .

a)  Calculate the magnitude of the total momentum of the trucks. 

The momentum (p) is the mass (m) of an object multiplied by its velocity (v). 

p = m x v

Answered by Anna L. • Physics tutor
14265 Views

A note was played on an electric keyboard. The frequency of the note was 440Hz. What does a frequency of 440 Hz mean?

A Frequency of 440Hz means that the wave is oscillating 440 times in one second. Ie. 440 waves are produced every second

Answered by Nick P. • Physics tutor
12216 Views

Explain the difference between a battery and a cell

A cell is a single unit of a power supply which uses chemical energy to produce energy. A battery is a group of cells joined in series.

Answered by Cristina O. • Physics tutor
21012 Views

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