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KonstantinChe [14]
4 years ago
8

What did Democritus discover?

Physics
1 answer:
In-s [12.5K]4 years ago
5 0
Democritus was a Greek philosopher who lived between 470 - 380 BC. He has been credited with developing the concept of the atom, an idea he got from his mentor Leucippus and adopted it. He conducted a simple experiment by taking a sea shell and breaking it in half. He then took that half and broke it in half over and over again until he was finally left with a fine powder. He then took the smallest piece of the powder and tried to break it but could not, and from this he had discovered that matter was made of indivisible building blocks, atoms.
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Sam and George are riding in separate cars on the freeway. The lanes they are driving in are adjacent. We choose our coordinate
butalik [34]

Answer:

(a) Relative speed of Sam = -7 mph

(b) Relative speed of George = 7 mph

Explanation:

We have given speed of Sam 65 mph in north direction.

And speed of George is 72 mph also in north direction

We have find the relative velocity of both Sam and George

(a) Speed of Sam relative to George = speed of Sam - speed of George = 65 -72 = -7 mph

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igor_vitrenko [27]
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Explanation:

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4 0
3 years ago
A hydraulic system contains 3 pistons. The input piston has an area of 0.625 in2, one of the output pistons ( piston A ) has an
Xelga [282]

The area of Piston A is 13.88 in^2

What is a hydraulic system?

The hydraulic system functions by using pressurized fluid.  The power of liquid fuel in hydraulics is significant and as a result, they are commonly used in heavy equipment.

Hydraulic system simply means a mechanical function that operates through the force of liquid pressure.

Here

A hydraulic system contains 3 pistons.

Pressure, P = 1440 psi

for piston A:

Area, A= 0.625 in^2

Force, F = 20,000 lb

We know that,

Force = Pressure x Area

F = P x A

Area ( piston A) = F / P

A = 20,000 / 1440

A = 13.88 in^2

Hence,

The area of Piston A is 13.88 in^2

Learn more about hydraulic system here:

<u>brainly.com/question/27961071</u>

#SPJ4

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If the treadmill’s initial speed is 1.7m/s, what will its final speed be?
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For how long? Or is it just speed ??
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