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xeze [42]
3 years ago
9

MULTIPLE CHOICE

Physics
1 answer:
marishachu [46]3 years ago
5 0

Answer:

It is to produce sunlight in the forest plants

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Mirrors reflect light and lenses absorb light.<br><br> True<br> False
cluponka [151]
The answer is true hope it helped
8 0
4 years ago
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Which statement best describes the difference between acceleration and velocity?
Sloan [31]
C. is the answer because acceleration is the change in velocity in time while velocity is speed with a direction
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3 years ago
Which body is in equilibrium?
zloy xaker [14]

Which body is in equilibrium?

(1) a satellite orbiting Earth in a circular orbit .  No.  The forces on it are unbalanced.  There's only one force acting on it ... the force of gravity, pulling it toward the center of the Earth.  That's a centripetal force, and the satellite is experiencing centripetal acceleration.

(2) a ball falling freely toward the surface of Earth.  No.  The forces on it are unbalanced.  There's only one force acting on it ... the force of gravity, pulling it toward the center of the Earth.  The ball is accelerating toward the ground.  

<em> (3) a car moving with a constant speed along a  straight, level road.  YES.</em> We don't even need to analyze the forces, just look at the car.  It's moving in a straight line, and its speed is not changing.  The car's acceleration is zero !  That  right there tells us that the NET force ... the sum of all forces acting on the car ... is zero.  THAT's called 'equilibrium'.

(4) a projectile at the highest point in its trajectory.  No.  The forces on it are unbalanced.  There's only one force acting on it ... the force of gravity, pulling it toward the center of the Earth.  The projectile is accelerating toward the ground.

7 0
3 years ago
 A hotdog cannon shoots a hotdog straight up in the air with an initial velocity of 30 m/s. How high will the hotdog fly?
Yuri [45]

At its peak height, the hotdog will have no vertical velocity, so that

{v_f}^2-{v_i}^2=2(-g)\Delta y\implies-\left(30\,\dfrac{\mathrm m}{\mathrm s}\right)^2=2\left(-9.8\,\dfrac{\mathrm m}{\mathrm s^2}\right)y_{\mathrm{max}}

\implies y_{\mathrm{max}}=46\,\mathrm m

7 0
3 years ago
When you are moving up at a constant speed in an elevator, there are two forces acting on you: the floor pushing up on you (F1)
WARRIOR [948]

Answer:

F₁ = F₂

Explanation:

Given that

floor pushing up on you  by force F₁

gravity pulling down by force F₂

From second law of Newton's

F₁ - F₂ = m a

But here given that ,elevator is moving with constant speed .It means that acceleration of the elevator is zero.

a= 0 m/s²

F₁ - F₂ = m  x 0

F₁ = F₂

6 0
3 years ago
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