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What is Newton's first law of motion?

Newton's first law of motion states 'an object will only experience acceleration if a resultant force is acting on it'. This means that only unbalanced forces will cause a change in the speed of the object. ...
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Answered by Daniel L. • Physics tutor
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What is the photo-electric effect and what impact did it have on the development of Quantum Mechanics?

The photo-electric effect is the process in which a metal will emit electrons when light of a sufficiently high frequency is incident upon it, Before Einstein's description of the photo-electric effect the o...
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Answered by Oliver B. • Physics tutor
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a car travels at a constant speed of 60 km/h. How far will it be after 3 h?

distance = velocity*time= 180 km
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Answered by Edmondo M. • Physics tutor
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A 12V lamp, 36W is switched on for 1 hour. Find the energy supplied by the battery.

E = P*t = 36 * 3600 = 1.3 * 10 5 J
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Answered by Rishabh A. • Physics tutor
4512 Views

A student heats a bar of chocolate in the microwave for one minute. When they remove the bar they observe that there are patches of melted chocolate with unmelted chocolate between them. Suggest the mechanism of how this happens.

This question is about standing waves, the bar of chocolate melts only in the positions where antinodes are formed on the standing wave as they transfer the most energy as they have the greatest amplitude of...
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Answered by Haydn D. • Physics tutor
8051 Views