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Why do windows around the house steam up?

The answer to this question is rather simple. There is a natural pressure/temperature difference between the inside of the house and the outside. The humidity in the warm air is much greater than that of col...
GD
Answered by Graeme D. • Physics tutor
2879 Views

How does a radioactive nucleus emit electrons when it doesn't contain any?

When a beta decay occurs there are a couple of things you need to remember. First of all you are right, the nucleus doesn't contain any electrons. It does however contain neutrons and protons. We know that p...
AC
Answered by Aisling C. • Physics tutor
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Describe Newton's second law.

Newton's second law, F=ma, describes the relationship between an external force on an object F, the mass of the object m and the resulting acceleration of the object a. We can see that the acceleration of th...
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Answered by Harry B. • Physics tutor
3476 Views

I don't understand acceleration and how something can accelerate without speeding up.

For this we must take a step back and analyse the meaning of acceleration. Acceleration is a change in VELOCITY - this is very important. Velocity is speed in a particular DIRECTION. You may be confusing vel...
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Answered by Jana S. • Physics tutor
7590 Views

When a hailstone of 0 C falls towards the earth, the kinetic energy of the hailstone is transferred to thermal energy in the ice. What is the minimum speed so that it just melts when it hits the surface. The latent heat of fusion of ice is 340 kJ/kg.

When approaching a Physics problem in IB, it is especially important to reread the question a couple of times and note down any information that you might think is relevant to solving the question and start ...
JK
Answered by Justin K. • Physics tutor
15040 Views