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3 years ago

99 POINTS PLEASE HELP, THIS IS FOR A QUIZ!!!

2 answers:

8 0

The answer to the first question is D. Sun.

For the next one the answer is D. The water droplets fall to earth as rain.

Next one is the Sun I think. Hope these answers help (sorry if I missed one, the numbers were a little wonky)

Pavlova-9 [17]3 years ago

8 0

1. D
2. D
3. B

Hope this helped! (:

You might be interested in

A book that weighs 20 N sits on a table. How big and in what direction does the force of gravity from the Earth act on the book?

taurus [48]

Answer:

A. 20 N down

Explanation:

It's asking how much force of gravity is acting on it. The book weighs 20 Newtons so that's how much gravity is being applied. Hope this helps

7 0

3 years ago

Read 2 more answers

An ant walks 2\,\text m2m2, start text, m, end text to the right and then climbs 1 \,\text m1m1, start text, m, end text up a wa

NNADVOKAT [17]

Answer:

26.56°

Explanation:

given,

horizontal distance travel by the ant = 2 m

vertical distance travel by the ant = 1 m

angle of the ant above the initial point = ?

using trigonometric function

$tan \theta = \dfrac{h}{x}$

θ is the angle of the ant form initial position

h is the height on the wall

x is the horizontal distance covered by the ant

$tan \theta = \dfrac{1}{2}$

$\theta =tan^{-1}(0.5)$

$\theta =26.56^0$

hence, the angle made by the ant from the initial position is equal to 26.56°

3 0

3 years ago

A player kicks a soccer ball in a high arc toward the opponent's goal. At the highest point in its trajectory

____ [38]

At the highest point in its trajectory, the ball's acceleration is zero but its velocity is not zero.

<h3>What's the velocity of the ball at the highest point of the trajectory?</h3>

At the highest point, the ball doesn't go more high. So its vertical velocity is zero.
However, the ball moves horizontal, so its horizontal component of velocity is non - zero i.e. u×cosθ.
u= initial velocity, θ= angle of projection

<h3>What's the acceleration of the ball at the highest point of projectile?</h3>

During the whole projectile motion, the earth exerts the gravitational force with a acceleration of gravity along vertical direction.
But as there's no acceleration along vertical direction, so the acceleration along vertical direction is zero.

Thus, we can conclude that the acceleration is zero and velocity is non-zero at the highest point projectile motion.

Disclaimer: The question was given incomplete on the portal. Here is the complete question.

Question: Player kicks a soccer ball in a high arc toward the opponent's goal. At the highest point in its trajectory

A- neither the ball's velocity nor its acceleration are zero.

B- the ball's acceleration points upward.

C- the ball's acceleration is zero but its velocity is not zero.

D- the ball's velocity points downward.

Learn more about the projectile motion here:

brainly.com/question/24216590

#SPJ1

7 0

2 years ago

Protons in an atomic nucleus are typically 10−15 m apart. what is the electric force (in n) of repulsion between nuclear protons

dybincka [34]

<span>The electric force is given by:
F = [ k*(q1)*(q2) ] / d^2
F = Electric force
k = Coulomb's constant
q1 = Charge of one proton
q2 = Charge of second proton
d = Distance between centers of mass
Values:
F = unknown
k = 8.98E 9 N-m^2/C^2
q1 = 1.6E-19
q2 = 1.6E-19
d = 1.0E-15 m
Insert values into F = [ k*(q1)*(q2) ] / d^2
F = [ (8.98E 9 N-m^2/C^2) * (1.6E-19) * (1.6E-19) ] / (1.0E-15 m)^2
F = </span>229.888 N
answer
the electric force of repulsion between nuclear protons is 229.888 N

3 0

3 years ago

Read 2 more answers

Consider the following four force vectors: F1 = 50 newtons, due east F2 = 10 newtons, due east F3 = 40 newtons, due west F4 = 30

Aleks [24]

Answer:

F3 + F4 has the highest magnitude = 70 newtons west

and F1 + F3 has the lowest magnitude = 10 newtons east

Explanation:

F1 = 50 newtons, due east

F2 = 10 newtons, due east

F3 = 40 newtons, due west

F4 = 30 newtons, due west

Let us consider East as negative and west as positive, so

F1 = -50 newtons

F2 = -10 newtons

F3 = 40 newtons

F4 = 30 newtons

F3 + F4 = 40 + 30 = 70 newtons

F1 + F2 = -50 - 10 = -60 newtons

F1 + F3 = -50 + 40 = 10 newtons

F1 + F4 = -50 + 30 = -20 newtons

F2 + F3 = -10 + 40 = -30 newtons

F2 + F4 = -10 + 30 = 20 newtons

It can be seen that F3 + F4 has the highest magnitude = 70 newtons west

and F1 + F3 has the lowest magnitude = 10 newtons east

4 0

3 years ago