- what is a half life of a substance and how can you work it out.
- A rollercoaster carriage wants to go up a slope of length 10m at an angle of 30 degrees above the horizontal, at what speed must the carriage be travelling at the bottom of the slope in order for it to reach the top? (Negligable Drag)
- Find the wavelength of a radio wave if the frequency is 11 x 10 ^6 Hz and the speed of radio waves in air is 3 x 10 ^8 m/s.
- Please describe the structure of atom, with reference to the relative mass and charge.
- Can you explain the different ways heat can travel?