Question

Name the following?
[3marks]
a) Impurities of sand and soil in an ore.
a) It is the number of oscillations occurring in one second.
b) Instrument used for sky watching.​

Answer 1

Ores usually contain soil, sand, stones, and other useless silicates. These undesired impurities present in ores are called gangue or matrix

The commonly used unit for the number of oscillations per second is the Hertz, so that this same pendulum is said to have a frequency of 2 Hertz, or 2 Hz. A third measure of oscillatory motion is the maximum distance of travel of the oscillator. This is called its amplitude.

Telescope

The refractor uses its lense to reflect the image. It was originally used in spy glasses and long focus camera lenses. It was also the same type used centuries ago by Galileo.

Answer 2

Answer:

I know the answer for 2 and 3

3.telescope

2.frequency