3 years ago

Why is the sky blue?

2 answers:

5 0

The sunlight of all colors passes through air, the blue part causes charged particles to oscillate faster than does the red part. More of the sunlight entering the atmosphere is blue than violet, however, and our eyes are somewhat more sensitive to blue light than to violet light, so the sky appears blue.

WINSTONCH [101]3 years ago

3 0

Answer:

it's blue

Explanation:

because gases and particles in earth's atmosphere scatter sunlight in all directions Blue light is scattered more than other colors because it travels as shorter smaller waves this is why we see a blue sky most of the time

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A dock worker loading crates on a ship finds that a 27 kg crate, initially at rest on a horizontal surface, requires a 80 N hori

Aleksandr-060686 [28]

Answer:0.302

Explanation:

Given

mass of crate m=27 kg

Force required to set crate in motion is 80 N

Once the crate is set in motion 56 N is require to move it with constant velocity

i.e. 80 N is the amount of force needed to just overcome static friction and 56 is the kinetic friction force

thus

$f_s(static\ friction)=\mu \cdot N$