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2 years ago

12

A light ray is striking the surface of Earth. Which factor would make the light ray more likely to be absorbed than reflected? l

ight colors smooth surfaces the winter season the high angle of the Sun

2 answers:

vichka [17]2 years ago

7 0

Answer:

The answer is D

Explanation:

Because the other options do not make since.

Vladimir [108]2 years ago

5 0

Answer:

B

Explanation:

Trust

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A large solar farm has 21 700 solar panels and generates 5.0 MW of power.

almond37 [142]

Answer:

answer is

Explanation:

average power each panel produces = 21700/ 5×10^6

4340 ×10^-6

that's mean 4340 micro Watt

8 0

2 years ago

Please only serious answers if you dont know the ansnwer, dont answer

Sedaia [141]

Answer:

Explanation:

A free-body diagram is a sketch of an object of interest with all the surrounding objects stripped away and all of the forces acting on the body shown. The drawing of a free-body diagram is an important step in the solving of mechanics problems since it helps to visualize all the forces acting on a single object. The net external force acting on the object must be obtained in order to apply Newton's Second Law to the motion of the object.

A free-body diagram or isolated-body diagram is useful in problems involving equilibrium of forces.

Free-body diagrams are useful for setting up standard mechanics problems.

8 0

2 years ago

A(n) 93 kg clock initially at rest on a horizontal floor requires a(n) 617 N horizontal force to set it in motion. After the clo

Viefleur [7K]

Answer:

$\mu_s = 0.676$

Explanation:

As we know that the force required to move the clock from rest position must be equal to the maximum limiting friction

So we will have

$F = F_f$

now we know that

$F_f = \mu_s Mg$

here we will have

$F = 617 N$

$m = 93 kg$

now from above formula we will have

$617 = \mu_s (93)(9.81)$

$\mu_s = 0.676$

5 0

2 years ago

A billiard ball is dropped from a height of 64 feet. Use the position function s(t) = –16???? 2 + ????0???? + ????0 to answer th

Delicious77 [7]

Answer:

s(t) = -16*t^2 + 64

v(t) = -32*t

a(t) = -32 ft/s^2

v(t) = 64 ft/s ... At impact

Explanation:

Given:-

- The height of the billiard ball t = 0 , h = 64 ft.

- The position function of an object under gravity is given by:

s(t) = -16*t^2 + v_o*t + s_o

Find:-

a. Determine the position function s(t),

b. the velocity function v(t),

c. the acceleration function a(t).

d. What is the velocity of the ball at impact?

Solution:-

- To determine the position function we must initialize our problem and use the given general equation.

- s(t) is the position of the billiard ball from the ground at time t. So when t = 0, then s(t) = h. Hence, we have:

s(t) = s_o = h = 64 ft

- Similarly we know that v_o is the initial velocity of the ball. Since, the ball was dropped we say that the initial velocity v_o = 0. Hence, the position of the ball from ground is given by following expression:

s(t) = -16*t^2 + 64

- To find the velocity expression v(t) we will take the time derivative of the position expression s(t) as follows:

v(t) = d s(t) / dt

v(t) = -16*2*t + 0

v(t) = -32*t ft/s

- Similarly, the expression for acceleration a(t) is given by the time derivative of the velocity expression v(t) as follows:

a(t) = d v(t) / dt

a(t) = -32*t

a(t) = -32 ft/s^2

- The velocity of ball at impact can be determined by evaluating s(t) = 0 and find the value for time t. Then that time t can be substituted in the velocity expression v(t) for final velocity. Or we could use the following 3rd kinematic equation as follows:

v(t)^2 - 0^2 = 2*a(t)*s_o

v(t)^2 = 2*(32)*(64)

v(t) = 64 ft/s

- The ball has a velocity of 64 ft/s at impact!

6 0

2 years ago

i like honey but when u put it on your feet it sticks to the ground. how do i avoid the stickyness of honey when i want to clean

Gre4nikov [31]

Answer:

please stop asking questions

Explanation:

6 0

2 years ago

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