- what is ohm's law?
- A mass of 2.5kg is raised by a height of 8m in 36 seconds using an electronic motor. Calculate the power of the motor.
- Explain the difference between a real and a virtual image.
- A wave with a constant velocity doubles its frequency. What happens to the wavelength?
- According to Newton's third law, every action has an equal and opposite reaction. Why then does a box move when I push it? Shouldn't the two opposing forces cancel out to a zero net force?