Which of the following describes light? (SELECT ALL THAT APPLY.)
A. Light passes through all objects.
B. Light is reflected off the surface of mirrors.
C. Light travels in a straight line.
D. Light waves behave in predictable ways.

Answers

Answer 1

Answer:

The light reflects twice before it finally exits the system. Draw a normal at the point of incidence to the first mirror; measure the angle of incidence (45 degrees); then draw a reflected ray at 45 degrees from the normal. Repeat the process for the second mirror.

Explanation:

Hope that helps!


Related Questions

What is this element?

Answers

Explanation:

sodium element with 11 electrons,11protons and 12 neutrons

the earth's crust is part of which sphere?​

Answers

Answer:

Lithosphere

Explanation:

The lithosphere is the solid, outer part of the Earth. The lithosphere includes the brittle upper portion of the mantle and the crust, the outermost layers of Earth's structure. It is bounded by the atmosphere above and the asthenosphere (another part of the upper mantle) below.

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Enzymes are catalysts in reactions. What statements describe functions of enzymes?

a. Enzymes are specific in their actions.
b. Once an enzyme binds to a substrate, it cannot be used again.
c. Enzymes lower the energy of activation needed for a reaction
d. Enzymes change the amount of free energy produced
e. Enzyme activity can be affected by temperature.

Answers

Answer:

a. Enzymes are specific in their actions.

c. Enzymes lower the energy of activation needed for a reaction

e. Enzyme activity can be affected by temperature.

Explanation:

Enzymes are proteinous structures that acts as biological catalysts in chemical reactions that occur within a system. Like every other catalyst, which speedens the rate of chemical reactions, enzymes possess certain characteristics that makes them have the catalytic nature. They include:

- Enzymes are specific in their actions: Enzymes are substrate-specific, meaning that an enzyme can only act on a substrate it recognizes and binds to.

- Enzymes lower the energy of activation needed for a reaction: Enzymes like other catalyst speed up the rate at which a reaction occurs by lowering the activation energy needed for the reaction to take place.

- Enzyme activity can be affected by temperature: Since enzymes are proteinous i.e made of proteins, they can be easily denatured by temperature. Hence, when exposed to high temperature, enzymes can lose its shape and ultimately its function.

a. Enzymes are specific in their actions.

c. Enzymes lower the energy of activation needed for a reaction

e. Enzyme activity can be affected by temperature.

What are Enzymes?  

Enzymes are structures that acts as biological catalysts in chemical reactions that occur within a system. Like every other catalyst, which increases the rate of chemical reactions, enzymes possess certain characteristics that makes them have the catalytic nature. They include:

- Enzymes are specific in their actions: Enzymes are substrate-specific, meaning that an enzyme can only act on a substrate it recognizes and binds to.

- Enzymes lower the energy of activation needed for a reaction: Enzymes like other catalyst speed up the rate at which a reaction occurs by lowering the activation energy needed for the reaction to take place.

- Enzyme activity can be affected by temperature: As enzymes are proteinous i.e. made of proteins, they can be easily denatured by temperature. Hence, when exposed to high temperature, enzymes can lose its shape and ultimately its function.

Therefore, option a, c and e are correct.

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When all the colors of the spectrum are combined, what will the human
eye see?
A black
B. blue
C. red
D. white

Answers

Answer: white?

Explanation:

When all the colors of the spectrum are combined and strike the human eye at the same time, the human eye will see white color. Therefore, option (D) is correct.

What is the electromagnetic spectrum?

The electromagnetic spectrum can be described as the range of frequencies of electromagnetic radiation and its wavelengths and photon energies. The electromagnetic spectrum have range from below one hertz to above 10²⁵ hertz.

Electromagnetic radiation with a wavelength between 380 to 760 nm is detected by the human eye and recognized as visible light. Other wavelengths, especially near-infrared and ultraviolet are also sometimes referred to as light.

White light can be defined as a combination of lights of different wavelengths in the visible region of the spectrum. When white light is passed through a prism splits it up into the several colors of light observed in the visible spectrum.

Therefore,  all the colors of the spectrum are combined, and the human eye will see white color.

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the ______ biodiversity in ecosystem is, the more sustainable it will be.​

Answers

i think that the more diverse an ecosystem is the more sustainable it will be. do you have a picture of your problem?

1. Your knee cap (patella) is just a hard cartilage. True or False?

2.When a muscle is working it can only contract, or get shorter. True or False?

3. When a muscle is NOT working, the opposing muscle is contracting and THIS is what moves the bone True or False?

4. What is the soft tissue between bones called?

5. What do Tendons do

6. What do you have that an octopus doesn’t have... physically?

Answers

1. True
2. From the nervous system yes
3. True
4. Tendon
5. Make a soft cushion in your bones
6. Hair

Number of atoms in 4.5 moles of Au?

Answers

Don’t have a calculator on me but multiply 6.02x10 to the 23rd power by 4.5

a pure sample of an unknown molecule has a mass of 0.03551 kg and contains 0.2000 moles wbat is the molecular weight of the substance

Answers

Answer:

No

Why?

Explanation:

A pure sample of an unknown molecule has a mass of 0.03551 kg and contains 0.2000 moles.

What is the molecular weight of the substance?

Answer:

177.6 g/mol

Explanation:

Trust me

Which chemical equations show a precipitation reaction?

Select all the correct answers.

2NaNO3(aq) + NiCl2(aq) → 2NaCl(aq) + Ni(NO3)2(aq)
MgSO4(aq) + CaCl2(aq) → MgCl2(aq) + CaSO4(s)
AlBr3(aq) + 3LiI(aq) → AlI3(aq) + 3LiBr(aq)
FeCl2(aq) + Na2CO3(aq) → FeCO3(s) + 2NaCl(aq)
2AgNO3(aq) + Na2S(aq) → Ag2S(s) + 2NaNO3(aq)

Answers

The equations that show a precipitation reaction would be [tex]MgSO_4(aq) + CaCl_2(aq) --- > MgCl_2(aq) + CaSO_4(s)[/tex], [tex]FeCl_2(aq) + Na_2CO_3(aq) --- > FeCO_3(s) + 2NaCl(aq)[/tex], and [tex]2AgNO_3(aq) + Na_2S(aq) --- > Ag_2S(s) + 2NaNO_3(aq)[/tex]

What is a precipitation reaction?

It is a reaction in which two soluble salts react in aqueous solutions to form one soluble and one insoluble salt.

Thus, all the equations with an insoluble salt as one of the products will qualify as precipitation reactions. The insoluble is designated as (s).

Hence, the following are precipitation reactions:

[tex]MgSO_4(aq) + CaCl_2(aq) --- > MgCl_2(aq) + CaSO_4(s)[/tex][tex]2AgNO_3(aq) + Na_2S(aq) --- > Ag_2S(s) + 2NaNO_3(aq)[/tex][tex]FeCl_2(aq) + Na_2CO_3(aq) --- > FeCO_3(s) + 2NaCl(aq)[/tex]

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HELP ASAP PLS Is an oxygen ion and fluorine ion bigger and why?

Answers

Answer:

From top to bottom of the periodic table ions will increase in radii. However, now left to right the radius is more of a function of the number of electrons. ... Similarly, O2- will be larger than F- as both have 10 electrons but Z=8 for oxygen and Z=9 for fluorine.

The oxygen ion is bigger than the fluorine ion , the reason is explained below

What is an Atomic Structure ?

An atom is composed of electrons , protons and neutrons .

Electrons have negative charge and are grouped in different shells around the nucleus

Protons and neutrons are present in positively charged nucleus

The nucleus has the most mass .The atomic number is the number of protons which is equal to the number of electrons.

Both oxygen atom and fluorine atoms are isoelectronic , they have 10 electrons in the shell , but oxygen has 8 protons while fluorine have 9 protons in the nucleus.

It is believed that as the atomic number increases so the attraction forces of the nuclei increases , making the nucleus smaller and the overall atom smaller

while the oxygen atom on reduction forms oxide anion , which is a dianion and a fluorine atom forms fluoride ion which has a single negative charge and the ion which has more electrons have more electron electron repulsion and the size of the ion is bigger.

Hence the oxygen ion is bigger than the fluorine ion.

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if 3.26 g is dissolved in enough water to make exactly 323 ml of solution, what is the molar cocentration of nitrate ion g

Answers

Divide both sides to get 104 and that’s your answer

i need help

can anyone help me

Answers

the answers are on the picture

write the neutralization equations that take place in the stomach with the bases present in the antacid product

Answers

Answer:

See explanation.

Explanation:

Hello!

In this case, since the antacid is usually composed by the following bases:

- Calcium, magnesium and aluminum hydroxides.

- Hydrogen sodium carbonate.

- Sodium carbonate.

In such a way, the feasible reactions that undergo when they react with the stomach acid are shown on the attached picture. As you can see, they all have in common the formation of chlorides and water, which are the neutralization products that calm down the acidity as they are neutral.

Best regards!

What is the name for C2I3

Answers

Answer: The correct name for the compound [tex]C_2I_3[/tex]  is, Dicarbon triiodide.

Explanation:

[tex]C_2I_3[/tex] is a covalent compound because in this compound the sharing of electrons takes place between carbon and iodine.. Both the elements are non-metals. Hence, it will form covalent bond.

The naming of covalent compound is given by:

The less electronegative element is written first.

The more electronegative element is written second. Then a suffix is added with it. The suffix added is '-ide'.

If atoms of an element is greater than 1, then prefixes are added which are 'mono' for 1 atom, 'di' for 2 atoms, 'tri' for 3 atoms and so on.

Hence, the correct name for the compound [tex]C_2I_3[/tex]  is, Dicarbon triiodide..

How many atoms are in 1 mole of water, H2O?

Answers

Answer:

1.807×10and at the top of ten put -24

Which feature does an iron metal have?

Answers

a feature that an iron metal has is a sea of electrons

in a pond food chain that includes tadpoles, algae, turtles, dragonflies, and frogs, which one is the primary consumer

Answers

Answer:

turtles

Explanation:

Turtles eat frogs and no animal in the pond can consume a turtle

A piece of glass has a temperature of 83˚C. Liquid that has a temperature of 43˚C is poured over the glass, completely covering it, and the temperature at equilibrium is 53˚C. The mass of liquid and glass is the same. If the specific heat of glass is 840 J/(kg˚C), determine the specific heat of the liquid.

Answers

Answer: The specific heat of the liquid is [tex]2520J/kg^0C[/tex]

Explanation:

[tex]heat_{absorbed}=heat_{released}[/tex]

As we know that,  

[tex]Q=m\times c\times \Delta T=m\times c\times (T_{final}-T_{initial})[/tex]

        .................(1)

where,

q = heat absorbed or released

= mass of glass = x kg

= mass of liquid = x kg

= final temperature =

[tex]T_1[/tex] = temperature of glass = [tex]83^oC[/tex]

[tex]T_2[/tex] = temperature of liquid = [tex]43^oC[/tex]

[tex]c_1[/tex] = specific heat of glass = [tex]840J/kg^0C[/tex]

[tex]c_2[/tex] = specific heat of liquid= ?

Now put all the given values in equation (1), we get

[tex]-[(x\times 840\times (53-83)]=x\times c_2\times (53-43)[/tex]

[tex]c_2=2520J/kg^0C[/tex]

Therefore, the specific heat of the liquid is [tex]2520J/kg^0C[/tex]

what are van allen belts?

Answers

Answer:

A Van Allen radiation belt is a zone of energetic charged particles, most of which originate from the solar wind, that are captured by and held around a planet by that planet's magnetic field. Earth has two such belts, and sometimes others may be temporarily created

Explanation:

2
What is the difference between weight and mass?
A Weight depends on density and mass depends on gravity.
B Weight depends on gravity and mass depends on volume.
C
Mass depends on gravity and weight is constant.
D Welght depends on gravity and mass is constant.

Answers

Answer:

Weight is the measure of the force of gravity on an object. The mass of an object will never change, but the weight of an item can change based on its location. For example, you may weigh 100 pounds on Earth, but in outer space you would be weightless.

Explanation:

I can't see the options but I hope this helps!

Answer:

the answer is B.

I hope this helps!

Explanation:

What is the standard reduction potential, E, for the half-reaction Al(aq) +
3e→ Al(s)?
OA. -0.76 V
OB. -1.68 V
Oc. 2.37 V
OD. 2.71 V
SUBMIT

Answers

The standard reduction potential for the given question is-1.68 V, under the condition that the given half-reaction is  Al(aq) +3e→ Al(s), then the required answer to the given question is Option B.

The standard reduction potential refers to the potential difference comparing the standard hydrogen electrode (SHE) and the half-reaction. The (SHE) possess a standard reduction potential of 0 V at all temperatures.

Hence, the standard reduction potential for the half-reaction Al(aq) + 3e→ Al(s) can be evaluated as follows

E°(Al₃⁺(aq) + 3e⁻ → Al(s)) - E°(H⁺(aq) + e⁻ → 1/2H₂(g))

= -1.66 V - 0 V

= -1.66 V

≈ -1.68 V

A half-reaction can occur for either the oxidation or reduction reaction component of a redox reaction. It projects the change in oxidation states of the substances involved. Half-reactions are applied to describe the processes in an electrochemical cell, in which one metal is oxidized at the anode and another metal is reduced at the cathode.

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Answer:

B

Explanation:

-1.68 V

How can you tell S-wave arrival from the end of the P-wave?

Answers

Answer:

The P wave will be the first wiggle that is bigger than the rest of the little ones (the microseisms). Because P waves are the fastest seismic waves, they will usually be the first ones that your seismograph records. The next set of seismic waves on your seismogram will be the S waves

A light bulb consumes energy at a rate of 80

joules per second . How long in

seconds will it take for the light bulb to consume 2.30 ~ 105

in energy?

Answers

Answer:

2875 s

Explanation:

From the question given above, the following data were obtained:

Power (P) = 80 J/s

Energy (E) = 2.3×10⁵ J

Time (t) = ?

Power can simply be defined as the rate at which energy is used. Mathematically, power is expressed as:

Power = Energy / time

P = E/t

With the above formula, we can obtain the time taken for the bulb to consume 2.3×10⁵ J. This can be obtained as follow:

Power (P) = 80 J/s

Energy (E) = 2.3×10⁵ J

Time (t) = ?

Power = Energy / time

P = E/t

80 = 2.3×10⁵ /t

Cross multiply

80 × t = 2.3×10⁵

Divide both side by 80

t = 2.3×10⁵ / 80

t = 2875 s

Therefore, it will take 2875 s for the bulb to consume 2.3×10⁵ J of energy.

What are the complete Ionic and Net Ionic equations for the following

a) CaCl2(aq) + Pb(NO3)2(aq) → PbCl2(s) + Ca(NO3)2(aq)

b) CaCl2(aq) + Na2CO3(aq) → CaCO3(s) + 2NaCl2(aq)

c) 2AgNO3 (aq) + BaI2(aq) → Ba(NO3)2 (aq) + 2AgI (s)

Answers

Answer:

Check photo

Explanation:

bill nye chemical reactions:

the picture looks cut off but can someone please help!

Answers

Answer:

. A(n) _______________________________ is matter that is composed of 2 or more different kinds of atoms.

2. A chemical reaction in which energy is released/given off is _____________________________________.

3. A(n) _________________________________ is a process in which substances are changed into other

substances.

4. Matter that is composed of only 1 kind of atom is a(n) ______________________________.

5. ___________________ is the ability to do work and/or transfer heat.

6. A chemical reaction in which energy is absorbed/taken in is _______________________________.

Knew/New

Write down 3 things you already knew about chemical reactions that were confirmed through watching the

video:

1.

2.

3.

Write down 3 new things that you learned from watching the video:

1.

2.

3.

Episode Guide

1. Chemicals can react to form new _________________________________.

2. Chemical reactions happen when ____________________ hook together.

3. Energy is given off during a chemical reaction because ____________________ are combining with other

__________________________.

4. During the "Try this" experiment, we see the students using vinegar and salt to clean old copper pennies.

The copper gets stripped away and the pennies look new again. Explain why you think this happens.

__________________________________________________________________________________________

Answer Key

compound

exothermic

chemical reaction

element

Energy

endothermic

Answers will vary.

Answers will vary.

chemicals

electrons

electrons

electrons

Copper atoms in the penny react with oxygen atoms from the air & together they form copper oxide which

makes the pennies look dull and dirty. The copper oxide dissolves in a weak acid (the vinegar & salt).

5. When vinegar and baking soda react together, the new substance that is produced is ___________________.

6. _______________ & ______________ are both dangerous by themselves, but when they react together they

form table salt.

7. Pyrotechnician is a name given to people who work to create _________________________.

8. In another experiment, we see kids blow up a balloon by mixing together vinegar and baking soda. When

the kids touch the blown up balloon, it is ____________ to the touch. This means that the reaction is

endothermic or exothermic

9. When someone gets hurt playing sports, often times a cold pack is used for the injury. The cold pack takes

up more energy than it gives off and it gets very ___________ to the touch. This means that the reaction taking

place is endothermic or exothermic

10. How do you know baking a cake is a chemical reaction? ________________________________________

11. There are ___________ naturally occurring elements.

12. If elements are in the same group on the periodic table, what does that tell you? ______________________

__________________________________________________________________________________________

True or False

1. When something burns, heat & light are given off. T or F

2. Your stomach growling is an example of a chemical reaction. T or F

3. Water is 1 part hydrogen and 2 parts oxygen. T or F

4. When baking a cake, a chemical reaction takes place. T or F

5. Everything is made of chemicals. T or F

6. Alfred Nobel invented dynamite. T or F

7. You should always wear safety goggles when working with chemicals. T or F

8. Sodium chloride is better known as sugar. T or F

9. A substance can feel a little warm if the reaction is endothermic. T or F

10. When developing film, red light doesn't affect the picture. T or F

11. A cold pack gets cold because the reaction takes more energy than it gives off. T or F

12. If chemicals behave similarly, they are grouped together on the periodic table. T or F

13. Chemical reactions happen when protons link atoms together. T or F

14. When vinegar and baking soda react, oxygen is produced. T or F

15. Fireworks are not an example of chemical reactions. T or F

carbon dioxide

Sodium chlorine

fireworks

warm

cold

The ingredients (flour, milk, eggs, etc.) are changed

Explanation:

please help..............

Answers

rgrgtff

ghhbbbhhghghgghgggferer

What element corresponds to period 5, group 2

Answers

Answer:

Strontium is the second element placed in the 5th period

Hope this will help you if not so advance sorry :)

what does (I) means in a chemical equation

Answers

Answer:

the l sign means the substance in the chemical equation is a liquid. (hope this helped : D )

Plsss name this compound ​

Answers

Explanation:

It looks like 2,2,4-trimethylpentane.

Longest alkane chain contains 5 carbons. => -pentane

3 methyl groups on the 2nd, 2nd and 4th carbons.

How many moles are 5.55 x 104 atoms of Mg?

Answers

Answer:

23 atoms. I hope this helped u

Explanation:

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Write a unit rate for the situation.$100 donated for every 5 volunteers PLZZZ I NEED HELP Which level of government isconcerned with making laws topromote local safety andmaintenance?a. federal government b. state government c. concurrent power . Given the Statementif twoAngles are right anglethen they areCongruent .Write the Converseand Stateif the Converse is true or false. Barney was a black male cat who used to live in our barn. But it wasn't long before Barney decided that the people feeding him every daymight be worth knowing. So he "moved in" now and then to snooze on an overstuffed chair, to wash himself on a soft rug, to climb into a lap for alittle petting, or to get an occasional handout after the people-dinner. Most nights, though. Barney preferred to stay outside prowling the area,investigating new smells from the passers-by during the day, threatening the field mice who scampered at night and keeping trespassers in theform of other cats out of his territory.Which statement can be made about Barney?O 1. Barney would rather be indoors than outdoors.2. Barney enjoyed his own independence.3. Barney was friendly with other cats.4. Barney preferred daytime prowling The _________________ is the hereditary material of the cell made up of sequences of four nucleotides arranged in linear strands called chromosomes. Combine like terms and simplify 4r - 6 - 2r + 5A. 2r - 1B. 10r + 5C. 10r - 3D. 2r + 1 At a middle school, 74 students have freckles. There are 258 students in the school. To the nearest tenth of a percent, what percent of the students have freckles? * The manager of a movie theater wants to know the number of adults and children who go to the movies. The theater charges $8 for each adult and $4 for each child. At a showing where 200 tickets were sold the theater collected $1304. How many adult tickets were sold.? f(x) = x^2+ 2x-5g(x) = 3x^2-4x+1What is f(x) - g(x)?A) [tex]-2x^2-2x-4[/tex]B) [tex]-2x^2+6x-6[/tex]C) [tex]4x^2-2x-4[/tex]D) [tex]4x^2+6x-6[/tex] if 50% is 15 what is 100% 1.What are the differences in the three branches of government in the U.S. andFlorida?Helpppppp Teacher: Will you submit your eork today? change into indirect speech Why should you avoid contractions and slang in a formal essay?A.Contractions and slang are usually reserved for Informal syntax.B.Teachers do not like slang and contractions.C.Contractions and slang are hard to read.D.You can use slang or contractions if they are in the dictionary. Which sentence from "There Will Come Soft Rains" contains an example of personification?A. "The dirty dishes were dropped into a hot washer and emerged twinkling dry."aB. "At eight-thirty the eggs were shriveled and the toast was like stone."OC. "The fire rushed back into every closet and felt of the clothes that hung there."OD. "This was the one house left standing." By signing the Munich Agreement, Germany agreed to plzzzzzzzzzzzzzzzzzzzzzzz Find the coordinates of the vertices of each figure after the given transformation.1) translation: (x, y) = (1 + 1, y - 5)D(2.0), E(1.2), F(2.3). G(4,2)A) D(-1, 1), E(-2, 3), F(-1,4), G(1,3) B) D(-4,-1), E(-5, 1), F(-4,2), G(-2, 1)C) D(3,-5), E(2, -3), F(3,-2), G(5,-3) D) D(-4,1), E(-5,3), F(-4,4), G(-2,3).BOOD 1) work out the size of angle x 2) give reasons for your answer During the summer, you had an ice cream cone withyour friends almost every day. Your parents boughta half gallon of ice cream for $4.75. It was onSale for 15% off. What was the sale price? The volume and base area of a rectangular cargo container is 720 cubicmeters and 120 square meters. Find the height of the container? *A)86,400m3B)400m3C)4mD)6m