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4 years ago

I need help with the last question

Physics

2 answers:

TEA [102]4 years ago

4 0

The best object shows the Earth appearing is something that round and smooth.

Mariana [72]4 years ago

3 0

The best object to show the Earth's true appearance is something round and smooth. Since the earth is only slightly oblate, it doesn't matter based on its size, and you would use a pool ball as the perfect scale model, because it is very round and smooth.

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The libero is the player who wears a different color jersey.<br> True or false

beks73 [17]

This is very much true

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3 years ago

Explain the term diffraction

kow [346]

Answer:

the process by which a beam of light or other system of waves is spread out as a result of passing through a narrow aperture or across an edge, typically accompanied by interference between the wave forms produced. Diffraction refers to various phenomena that occur when a wave encounters an obstacle or opening. It is defined as the bending of waves around the corners of an obstacle or through an aperture into the region of geometrical shadow of the obstacle/aperture.

Explanation: FYI I gave you the def and what it refers to BTW

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3 years ago

The sun’s absolute magnitude is described as _______ in comparison to other stars.

cupoosta [38]

very small

Being close to the earth can be milseading. I think that if the sun were at the same distance as anohter star, it might be hard to see because it is small, relatiavely speaking

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3 years ago

Read 2 more answers

(Don't answer that there is no image, its a simple question)

Aleksandr-060686 [28]

Answer:

yes

Explanation:

of course indeed correct

3 0

3 years ago

2. A 3 kg ball is thrown downward at 4 m/s from a height of 1.5 m. a. What is the kinetic energy of the ball as it leaves the th

ludmilkaskok [199]

Answer:

a) 24 J

b) Gravitational Force

c) 45 J

d) 0

e) 6.782m/s

Explanation:

a) m = 3kg

v = 4m/s

h = 1.5m

KE = ?

0.5 * 3 * 16 = 24J

b) Gravitational force

c) F = ma = 3 * 10 = 30N

Work done = Force * distance = 30 * 1.5 = 45J

d) Final Kinetic Energy of the ball is zero because the ball eventually stops moving

e) velocity of ball as it strikes the ground = v

$v^{2} - u^{2} = 2as$ where

v is the velocity as it strikes the ground

u is the initial velocity

a is acceleration

s is the distance

Now since the ball is thrown downwards, a is positive because the velocity of the ball is increasing as the gravitational force acts on it

u = 4m/s

a = 10

s = 1.5

=> $v = \sqrt{2as + u^{2} }$

= $\sqrt{(2*10*1.5) + 16}$

= $\sqrt{46} = 6.782m/s$

3 0

3 years ago