Answer:
Gold
mica
halite
gypsum
copper
Explanation:
Gold:it is used in dentistry
mica: its is used in putting sparkle in rock
halite:its used in seasoning food and softening water
gypsum: it is used as fertilizer and road construction
copper: it is used for jewelry and currency
I'm sure it's Centripetal force
Answer:
Option b. is true
Explanation:
- Light travel slower in glass than in air because of glass is denser than air and its refractive index is more than that of air. Therefore, except air, light travels slower in any other medium
Other options are not correct like
When an electromagnetic wave enters a new medium it speed as well as wavelength changes but frequency does not change.
An electrostatic generator (also known as a Van de Graff generator) uses a moving belt, like a conveyor belt to make an electrical charge inside of a hollow metal globe supported by a rod. It produces very high DC or direct current.
let's find the coordinates of the points on the line.
(-1, -2)(1, 3)