Our topic at school is light- What is dispersion, diffusion, refraction and reflection?

Answers

Answer 1

Answer: Dispersion-Distributing something over an area.Diffusion-the scattering of light by reflection from a rough surface.
Refraction-Turning or bending of any wave.
Reflection- Image.

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Luke investigated the heating of water

Answers

Amazingly awesome !
Go Luke !
See Luke investigate !
Water, water, water.
Heat, heat, heat.
Luke rocks !
He probably learned something.

As a liquid is added to a beaker, the pressure exerted by the liquid on the bottomof the beaker
A decreases
B stays the same
C increases

Answers

Answer: c) increases

Explanation:

Pressure increases with decreasing height

Which of these is most likely to lead directly to a black market?a. a supply shock
c. rationing
b. a price floor
d. equilibrium

Answers

The answer is C.rationing.

♡♡Hope I helped!!! :)♡♡

Answer:

c. rationing

Explanation:

allow each person to have only a fixed amount of (a particular commodity).

Which statement best describes one main idea of Of Plymouth Plantation?

Answers

The correct answer for this question is this one: "The Pilgrims found themselves in a hostile environment with only their religious faith to sustain them." This is the best statement that best describes one main idea of Of Plymouth Plantation.

Suppose for your cookout you need to make 100 hamburgers. You knoe that 2.00 pounds will make 9 hamburgers. How many pounds will u need?

Answers

The cook needs to make 100 hamburgers. The price of 9 hamburgers is 2 pounds. Then 22.2 pounds are needed to bring 100 hamburgers.

What are methods of finding price values ?

There are simple mathematics to find the price of a material based on the data we have on it. For example if we know the price of one unit of that material then multiply the price by the number of units we want to buy.

If know the price of a bulk or certain number of materials, then find the price of one material from it.

Here, the price of 9 hamburgers is given 2 pound. Then, the price of one hamburger is :

2/9 = 0.22.

Now, multiply the value of one hamburger with the number that we want. We want 100 hamburgers. Then,

100× 0.22 = 22.2 pounds.

Therefore, 22.2 pounds are needed for 100 hamburgers.

Find more on hamburgers:

brainly.com/question/13198246

#SPJ2

if
2.0 pound will make 9 hamburgers
so 100 hamburgers will make by pounds = 100/9 × 2.0 = 22.2 pounds

the ans is (22.22 pounds will make 100 hamburgers)

How does a pulley make it easier to load cargo onto a cargo ship?A.
The pulley increases the force needed to lift the load by moving it over a longer distance. It also changes the direction of the force. As the input force is applied downward, the output force is exerted upward.

B.
The pulley reduces the force needed to lift the load by moving it over a longer distance. It also changes the direction of the force. As the input force is applied downward, the output force is exerted upward.

C.
The pulley increases the force needed to lift the load by moving it over a shorter distance. It also changes the direction of the force. As the input force is applied upward, the output force is exerted downward.

D.
The pulley reduces the force needed to lift the load by moving it over a shorter distance. It also changes the direction of the force. As the input force is applied upward, the output force is exerted downward.

Answers

Answer:

The pulley reduces the force needed to lift the load by moving it over a longer distance. It also changes the direction of the force. As the input force is applied downward, the output force is exerted upward.

Explanation:

When we use pulley system to pull the heavy weight then it is easier to pull the weight upwards because while we use use pulley to pull the objects then the force that is applied on the string is exerted at some angle with the vertical

Due to this we need to apply force at some angle with the vertical and it increase the output force on the object which is to be pulled

So here our effort is in downward direction to pull the object in upward direction

so correct answer will be

A pulley make it easier to load cargo onto a cargo ship The pulley reduces the force needed to lift the load by moving it over a shorter distance. It also changes the direction of the force. As the input force is applied upward, the output force is exerted downward. The answer is letter D

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A ray of light is travelling from north towards south and it has travelled 49 km until it hit a mirror which reflected the light towards east. The ray of light reflected towards east has travelled 47 km until it hit another mirror which reflected it diagonally towards the initial point which is north. How long is the line reflected towards north diagonally? Round the result to two decimals.