2024

• 2 energy stores that increase when the whisk is switched on

  ---kinetic energy of the heater

  ---thermal energy of the whisk
• equation for power,time,work done

  p=$\frac{w}{t}$
• equation links to current,power,resistence

  P=I$^{^{^2}}$R
• pd differnce btw the live wire and neutral wire in main electricity supply

  230V
• Current in the whisk increases so

  resisitence decreses
• alpha particles consists of

  2 protons and 2 neutrons
• james chadwick

  created neutrons- showed existed
• how the student should adjusted the circuit to vary the pd across the range

  Change the number of cells in the battery.

  Reverse the connections to the LED/battery.
• if 2 results for both different LED(blue,red) showed same pattern then

  The investigation is reproducible
• The current and pd for an LED is non-linear

  for linear- current and pd in a resistor at constant temp
• as a drone moves at a constant speed and gains height, its energy storesss.....

  -chemical energy store decreases

  -gravitational potential energy of the drone increases
• beta

  minus 1 to the bottom number(atomic number)
• name given to the process where other scientists check work before publishing it

  peer review
• Explain how the motion of the particles in warmer air causes an increase in the power transferred to the turbine

  -At high temp, the average speed of particles is greater

  -so the frequency of collisions btw the particles and the turbine increases

  -and the force of each collision btw a particle & the turbine is greater

  -So more energy is transferred each second