PHYSICS HIGH SCHOOL

Glare appears on a computer screen when light from the surroundings reflects off of the screen’s surface. Some computer screens have a special coating to reduce glare.Which best explains how the coating works?

A:The coating absorbs light that shines on it and prevents the light from reflecting

B:The surface of the coating is rough, so light that shines on it gets scattered in many directions.

C:The coating bends light that passes through it and prevents the light from reaching the user’s eyes

D:The surface of the coating allows light from the room to pass through but blocks the light from the screen.

Answers

Answer 1

Answer:

Answer:

The correct answer is D.

D:The surface of the coating allows light from the room to pass through but blocks the light from the screen.

Explanation:

Glare is produced on a computer screen when light from some external source reflects on the screen.

Anti-glare coating do not absorb light to reduce glare but they actually reduce glare by encouraging the light from the room to pass through the screen so that less light is reflected. Polarized lenses absorbs light to reduce glare, not anti-glare coating.

Answer 2

Answer:

Answer: d

Explanation:

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What increases as the temperature of a solid object rises?A. thermal energy

B. potential energy

C. volume

D. mass

Answers

answer is thermal energy

A. Thermal energy
Thermal energy is heat energy, therefore the hotter a solid is the more thermal energy it has.

C. Volume
When an object gets hotter, it expands. This is becuase the particles vibrate more and so are less compact.

You want to set up an aquarium and need to determine what size tank to buy. The graph shows tank sizes using a rule that relates the capacity of the tank to the combined lengths of the fish it can hold.If you want four 2-inch platys, three 1-inch guppies, and a 3-inch loach, what is the smallest capacity tank you can buy?

17-gallon tank
13-gallon tank
15-gallon tank
14-gallon tank

Answers

The minimum volume of the tank required for combined lengths of the fish is $\boxed{15\,{\text{gallons}}}$ .

Further Explanation:

The graph between the capacity of the tank and the combined length of the fishes present in the tank starts from the point $\left( {0,1} \right)$ and further it passes through the point $\left( {3,4} \right)$ .

The expression for the slope of the graph is as given below.

$m = \frac{{{y_2} - {y_1}}}{{{x_2} - {x_1}}}$

Substitute the co-ordinates of the points in equation of slope.

$\begin{aligned}m&= \frac{{4 - 1}}{{3 - 0}}\n&= (3)/(3)\n&= 1\n\end{aligned}$

The y-intercept of the graph is $1$ .

Write the expression for the equation of line of the graph.

$y = mx + c$

Substitute $1$ for $m$ and $1$ for $c$ in above expression.

$\begin{aligned}y&= \left( {1 \cdot x} \right) + 1 \hfill\ny&= x + 1 \hfill\n\end{aligned}$

The total length of all the fishes present inside the tank is.

$\begin{aligned}{L_(total)} &= \left( {4 * 2} \right) + \left( {3 * 1} \right) + \left( {1 * 3} \right) \n&= 8 + 3 + 3\n&= 14\,{\text{inches}}\n\end{aligned}$

Since the length of the fishes is given on the x-axis, substitute $14\,{\text{inches}}$ for $x$ in equation of line of the graph.

$\begin{aligned}y&= 14 + 1\n&= 15\,{\text{gallons}}\n\end{aligned}$

Thus, the minimum volume of the tank required for combined lengths of the fish is $\boxed{15\,{\text{gallons}}}$ .

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Answer Details:

Grade: High School

Chapter: Units and Measurements

Subject: Physics

Keywords: Aquarium, size of tank, capacity of the tank, combined lengths, the fish, platys, guppies, loach, inch, smallest capacity, gallon.

connexus unit 8 lesson 1 PRACTICE!

1) B

2) C

3) A

4) C

5) B

6) A

7) D

8) A

9) D

10) A

11) A

12) C

13) D

14) C

15) B

16) B

Hope this helps you guys out!

An extended period when temperatures are well below average is known as a/an A. drought.
B. ice age.
C. cold wave.
D. draft.

Answers

It would be a cold wave.
Ice ages occur when the temperatures are extremely cold.(long-term)

Depends on the "period". If weeks, months, or years, then it's a cold wave. If centuries, then you've got yourself an ice age.

you lift a 30 N crate 2 meters onto a shelf. it takes you 5 seconds to accomplish this. how much gravitional potential energy does the crate gain

Answers

Gravitational potential energy is equal to force times height. That's 30 x 2 = 60 Joules. It makes no difference how fast or how slow you do the lift.

The sun is its highest in the sky during what season

Answers

*olaf voice*

IN SUMMMMMMERRRRRRR

The sun is at its highest in the sky during Summer

The Sun and most stars are made almost entirely of a. hydrogen and carbon. b. helium and nitrogen. c. oxygen and nitrogen. d. helium and hydrogen.

Answers

So the question is what are the Sun and most stars almost entirely made of. So most stars, including our Sun are made out of hydrogen and helium. There is also a small percentage of oxygen, carbon and nitrogen and also very small quantities of iron, silicone and other metals. So the correct answer is d.

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