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nekit [7.7K]
2 years ago
13

The Intensity of solar radiation at the Earth's orbit is 1370 W/m2. However, because of the atmosphere, the curvature of the Ear

th, and rotation (night and day), the actual intensity at the Earth's surface is much lower. At this moment, let us assume the intensity of solar radiation is 750 W/m2. You have installed solar panels on your roof to convert the sunlight to electricity. A) If the area of your solar panels is 4 m2, How much power is incident on your array? Watts Submit Answer Tries 0/2 B) Unfortunately, solar panels are only about 20% efficent... Only 1/5 of the light is converted to electricity. This being the case, how much electrical power are you actually producing for your home at this moment?
Physics
2 answers:
Otrada [13]2 years ago
3 0

Answer:

A. Power incident on panel = 3000W

B. Electrical power generated = 600W

Explanation:

Actual solar intensity I = 750W/m2

A) if area A of panel = 4m2, then,

Power incident on panel = I x A

P = 750 x 4 = 3000W

B) if panel efficiency is 20%,

Then,

Power generates = 0.2 x 3000 = 600W of electricity.

Svet_ta [14]2 years ago
3 0

Answer:

a) 3000W

b) 600W

Explanation:

A) To solve this problem we have to use

P=IA

where I is the intensity of light and A is the area of our solar panels. By replacing we have

P=(750\frac{W}{m^2})(4m^2)=3000W

B) However we know that the panel only absorb 20% of the total power. Hence we have that the real power is

P_r=0.2IA=0.2(3000W)=600W

HOPE THIS HELPS!!

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Physics Homework MathPhys homie if you see this pls help
cluponka [151]

Answer:

1. -8.20 m/s²

2. 73.4 m

3. 19.4 m

Explanation:

1. Apply Newton's second law to the car in the y direction.

∑F = ma

N − mg = 0

N = mg

Apply Newton's second law to the car in the x direction.

∑F = ma

-F = ma

-Nμ = ma

-mgμ = ma

a = -gμ

Given μ = 0.837:

a = -(9.8 m/s²) (0.837)

a = -8.20 m/s²

2. Given:

v₀ = 34.7 m/s

v = 0 m/s

a = -8.20 m/s²

Find: Δx

v² = v₀² + 2aΔx

(0 m/s)² = (34.7 m/s)² + 2 (-8.20 m/s²) Δx

Δx = 73.4 m

3. Since your braking distance is the same as the car in front of you, the minimum safe following distance is the distance you travel during your reaction time.

d = v₀t

d = (34.7 m/s) (0.56 s)

d = 19.4 m

6 0
3 years ago
Consider the following FBDs.FBDsAn elevator is suspended by a cable and moves uniformly upward. Which of the above free body dia
Drupady [299]

The force of gravity F_g will act downwards.

Normal force F_N will act upwards equal to the force of gravity.

A force due to uniform acceleration F_a will act upwards to move the elevator upwards.

Thus, figure E is the correct answer.

6 0
1 year ago
Blizzards and hurricanes are examples of contrasting observations evens. Truth or False
noname [10]
The correct answer should be True
7 0
3 years ago
Read 2 more answers
Kinematics practice problems Answers: 4. A race car is traveling at +76 m/s when is slows down at -9 m/s2 for 4
arlik [135]

The new velocity after 4 s is 40 m/s

The height of the spaceship above the ground after 5 seconds is 1,127.5 m

The given parameters for the first question;

  • initial velocity of the car, u = 76 m/s
  • acceleration of the car, a = - 9 m/s²
  • time of motion, t = 4 s

The new velocity after 4 s is calculated as;

v = u + at

v = 76 + (-9)(4)

v = 76 - 36

v = 40 m/s

(5)

The given parameters;

  • height above the ground, h = 500 m
  • velocity of spaceship, u = 150 m/s
  • time of motion, t = 5

The height of the spaceship above the ground after 5 seconds is calculated as;

h_y = h_0 + ut - \frac{1}{2}gt^2\\\\h_y = 500 + (150\times 5) -  (0.5\times 9.8 \times 5^2)\\\\h_y = 1,127.5 \ m

Learn more here: brainly.com/question/24527971

5 0
2 years ago
Select the correct answer. The motion of a car on a position-time graph is represented with a horizontal line. What does this in
enyata [817]

If the car's motion appears as a horizontal line on a <u><em>position-time </em></u>graph, it shows that as time changes, the car's position doesn't change.

This is just a complicated way to say that the car is <em>not moving</em>.<em> (A)</em>

7 0
3 years ago
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