Answer:
a. Two bodies are rubbed against each other they acquire equal and Opposite charge.
b. Electron are transferred from one object to another when two objects are charged by friction.
c. Lightening rod is a device used to secure tall buildings from the effect of lightning
d. Negative charge is obtained by plastic comb when rubbed with dry hair.
e. Lightning is natural spark discharge on huge scale.
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Answer:
0.5mi/min
Explanation:
Velocity = change in distance/time taken
Velocity= (5-0)/(20-10)=5/10=0.5mi/min
Through satellites they launch into space.
Because it helps the nail to enter an object
A velocity and wavelength
Explanation:
When a periodic wave travels from one medium to another, its velocity and wavelength changes in the process.
A periodic wave is a wave with repeating pattern.
- When a wave crosses different medium with different densities, their velocity and wavelength changes.
- This implies that wave causes disturbances in different ways.
- This change in wavelength and velocity as a wave crosses two medium is known as refraction.
- When a wave moves from a less dense medium to a denser one, the velocity reduces and the wavelength increases.
learn more:
Refraction brainly.com/question/12370040
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