Currently doing my A2 Levels and have just been revising over electromagnetic induction. The general consensus seems to be that current can only be induced in a changing magnetic flux.The textbook I'm using constantly refers to cutting a magnetic field, i.e. moving a wire relative to a field, to...
Why, when a fraction has repeated linear terms in its denominator e.g. (11x2+14x+5)/[(x+1)2(2x+1)] does it have to be split into three partial fractions, A/(x+1) + B/(x+1)2 + C/(2x+1)?
When my first saw this example, my initial reaction was to split it into A/(x+1)2 +B/(2x+1), but after working...
Okay so I'm solving this equation: 2sin(x)-3cos(x)=1
I'm solving it by equating the left hand side to a single trigonometric equation.
What I did first: I equated the left hand side to a sine function. So
2sin(x)-3cos(x)=Rsin(x+a). Then I used the addition formula.
Rsin(x+a)=...
In my maths textbook, it says that work done can be defined as Force x Distance moved in direction of force, AND change in kinetic energy. I feel both these definitions can be contradictory
Example:
A box moves at a constant velocity along a rough horizontal plane. It has a driving force of 5N...
Newton's third law states that for every action, there is an equal and opposite reaction. This doesn't make sense to me, because it seems as though everything would cancel out and so nothing would ever happen.
For example, imagine a person attempting to push a large box; not just a quick push...
A general summary of the experiment is that when the light clock is stationary on the platform it runs as normal, up and down, but when someone is looking at a clock on a moving train, it appears to move slower because the light has further to travel, and thus, time runs slower.
What confuses me...
I'm struggling to understand why 'amps' is a base unit. An amp is defined as one coulomb per second, correct? Then surely it isn't a base unit! It clearly relies on the coulomb. Like, if the coulomb didnt exist, or the amp was discovered before the coulomb was discovered, what would the amp be...
Right, I've started physics a level and electrolysis has always confused me since gcse, so please be very detailed!
This is what I know, (or assume) so far: there is a cell; that cell is connected to two electrodes; one is positive, the other is negative. The electrodes are placed in an ionic...