Why mole is called fundamental unit.

Physics

1 answer:

gladu [14]3 years ago

4 0

Explanation:

because it doesn't depend upon other unit like kg meter and second

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A cannon tilted upward at 30° fires a cannonball with a speed of 100 m/s. At that instant, what is the component of the cannonba

Sonja [21]

Answer:

the cannonball’s velocity parallel to the ground is 86.6m/S

Explanation:

Hello! To solve this problem remember that in a parabolic movement the horizontal component X of the velocity of the cannonball is constant while the vertical one varies with constant acceleration.

For this case we must draw the velocity triangle and find the component in X(see atached image).

V= Initial velocity=100M/S

$cos30=\frac{Vx}{V}$

V= Initial velocity=100M/S

Vx=cannonball’s velocity parallel to the ground

Solving for Vx

Vx=Vcos30

Vx=(100m/S)(cos30)=86.6m/s

the cannonball’s velocity parallel to the ground is 86.6m/S

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Answer:

Under normal conditions, a magnetic material like iron doesn't behave like a magnet because the domains don't have a preferred direction of alignment. On the other hand, the domains of a magnet (or a magnetized iron) are all aligned in s specific direction.

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3 years ago

In the United States, when we use this non–renewable resource to generate power, the environment is harmed.

ikadub [295]

Coal, natural gas, and petroleum all qualify as correct answers.

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4 years ago

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A tank is 6 m long, 4 m wide, 5 m high, and contains kerosene with density 820 kg/m3 to a depth of 4.5 m. (Use 9.8 m/s2 for the

Mazyrski [523]

The pressure at the bottom of the tank is given by:

P = ρgh