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For 100ml of a liquid with a mass density of 1(kg m^-3), and a specific heat capacity of 2(kJ kg^-1 K^-1), how much energy is required to increase the temperature of the liquid by 4 degrees celsius. Assume no heat loss and that the liquid does not boil.

The key equation to this question is the energy transfer equation of Q = mcT. Q represents the amount of energy put into the system, m is the mass of the object we're talking about in kg, c is its specific h...
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Answered by Henry W. • Physics tutor
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What is the difference between voltage and current?

The voltage (or potential difference ) between two points is the cost in energy to move a unit of positive charge from the point of lower potential to the point of higher potential. Current is the rate of fl...
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Answered by Daniel W. • Physics tutor
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What energy transfers are involved in you being able to move?

Firstly, energy transfers happen step by step. Almost all energy on Earth comes from the Sun. The Sun causes plants to photosynthesise so the energy becomes chemical energy in your food. When you eat your fo...
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Answered by Owen L. • Physics tutor
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Explain why for heavy nuclei there is imbalance in the number of protons and neutrons. Give reference to the range and particle type of the forces that influence this imbalance.

In the nucleus the forces that govern how the body is kept together is the Strong Nuclear Force and the Electromagnetic Force, these two force differ in range and the type of particle they interfere with. Th...
Answered by • Physics tutor
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What's the moment of a force and why would I need to understand it?

Mathematically you'd express it as M=F x d, Moment = Force times distance (from the pivot), unit being Nm, Newtons times meters. Simply speaking, it's how you quantify an object's ability to rotate around it...
Answered by • Physics tutor
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