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How can you tell if a reaction will happen?

This will depend on the conservation laws. In the same way that a numerical equation must be equal on either side, a reaction must have the same amount of certain properties on each side. The properties that...
CE
Answered by Chloe E. • Physics tutor
3565 Views

What are the main differences between magnetic and electric fields?

Magnetic and electric fields share many similarities and symmetries (for example they both act on electric charge and obey an inverse square law of force), but there are some important differences. One diffe...
SH
Answered by Sam H. • Physics tutor
21775 Views

A golf ball is hit at angle θ to the horizontal, with initial velocity u. Stating an assumption, show that the horizontal distance travelled by the ball is directly proportional to u^2.

If we assume there is no air resistance, this means that the horizontal component of the ball's velocity won't change. Resolving horizontally we can see that the horizontal velocity = u cos(θ). We can then u...
DB
Answered by Douglas B. • Physics tutor
11364 Views

A man weighing 600N steps on a scale that contains a spring. The spring is compressed 1cm under their weight. Find the force constant of the spring and total work done on its compression.

relevant equations: F = k*x F is force, k is spring constant and x is displacement from equillibrium. W = 1/2 k x 2 W is work done. rearranging F = k*x and using the information in the question we can solve ...
TC
Answered by Tabraiz C. • Physics tutor
15261 Views

What is the difference between free vibrations and forced vibrations?

Free vibrations involve no transfer of energy between the vibrating object and its surroundings, whereas forced vibrations occur when there's an external driving force and thus transfer of energy between the...
MS
Answered by Michael S. • Physics tutor
26446 Views