Question 1
State two factors that affects the speed of sound in gases
Answer
- Density of the gas
- Humidity
- Humidity
Question 2
Light of wavelength 6.7 x 10-7m has a frequency of 4.48 x 1014 HZ. Calculate its speed
Answer
Question 3
Explain how the intensity of X-rays produced in an X-ray tube is controlled
Answer
- It is controlled by the filament currenty
- This controls the temperature of the tungsten filament
- Hence the rate of emission of electrons (intensity)
- This controls the temperature of the tungsten filament
- Hence the rate of emission of electrons (intensity)
Question 4
What is a virtual image
Answer
- Image formed by imaginary rays
Question 5
A form two student of Miluma Secondary School found his dry cells leaking on removing them from his torch. He asked his friend what could be the cause of this. What answer did his friend provide
Answer
The depolarizer manganese IV oxide has oxidized hydrogen gas produced during polarization to water