You can try these Electricity exam practise questions:
http://www.online-exam-solutions.co.uk/subjects/physics/physics-as-level/electricity
I got quite low in my first attempt, but then kept going through until i was confident.
Apparently if you can do them all your on track for top marks...
Some ideas for modern day problems in physics:
-Computing progress and Quantum computing
-Extrasolar planets and and habitability
- Applications of super materials like graphene
- The nature of Dark matter and/or Dark energy
p.p.s. I am using online-exam-solutions website for my exam revision. Its pretty good for this sort of thing because they have lots of example questions. Am not sure how relevant it will be for non UK students though...it may be worth checking out
p.s. You can think of that t value as the time it takes for the water droplet to pass/intersect a vertical line 0.4 m away (horizontally) from the fish. It is basically the time it takes for the water droplet to reach the "y" line in your figure.
First you must resolve horizontally (<--->) to find the time it takes to reach a horizontal distance of 0.4 metres. (You have, s,a and u, so you can find t)
Once you have found this time, t, you must use it to find the vertical height. You do this by resolving vertically. Remember that...
Homework Statement
A 500W heating unit is designed to operate on a 115V line. If the line voltage drops to 110V, calculate the percentage drop in heat output.Homework Equations
R=V^2/PThe Attempt at a Solution
P=V^2/R
Use V=115, then use V=110, use Power P=500...but not sure how
p.s. I am a...
1. Well you are given the height it reaches. You also know the acceleration due to gravity. Finally you know the velocity of the ball at maximum height. So you know Smax, a and v. You want to find u (the initial velocity)
2. You must use the relevant 'SUVAT' equation.
You can use v^2=u^2 +2as...