Chemistry Middle School

Which of the following is a combination of more than on simple machine?

A.Pulley
B.Wedge
C.Scissors
D.Incline

Answers

Answer 1

Answer:

D.

Explanation:

Answer 2

Answer:

It is D. Incline

Related Questions

It is important that engineers build a structure that is safe. What do they look for when testing their designs?

Failure points
Fair tests
Prototypes
Variables

Answers

Variables
or failure points

Answer:

Failure Points

Explanation:

Engineers want to test the areas that may possibly fail when they are building designs so when they go to actually build it they know it will not fail.

So im confused i don't know what im supposed to do here

Answers

So I believe you are supposed to take notes based on the guiding questions (the questions on the side).

Answer:

save your notes in a google drive folder then go back to canvas and click on the "google drive" tab then scroll down and once you see the name of the folder you saved your notes in, click on it then hit submit

Explanation:

which of the following can cause an algal bloom ?

Answers

Answer:

I believe its either C or D

Answer:

The answer should be B.

I WILL GIVE BRAINLIEST BUT THE QUESTIONS MUST ALL BE ANSWERED

Directions: Identify the manipulated variable and responding variable for each hypothesis.
HINT: If (fill in manipulated variable), then (fill in responding variable)

1. If plants are watered, then growth height will increase.
Manipulated variable: ________________________________________________________________________
Responding variable: ________________________________________________________________________

2. If chocolate is given to teachers, then amount of homework will decrease.
Manipulated variable: ________________________________________________________________________
Responding variable: ________________________________________________________________________

3. If trees have leaves, then bird nests will increase.
Manipulated variable: ________________________________________________________________________
Responding variable: ________________________________________________________________________

4. If acid rain is in water, then fish population will increase.
Manipulated variable: ________________________________________________________________________
Responding variable: ________________________________________________________________________

5. If calcium is given, then bone strength will increase.
Manipulated variable: ________________________________________________________________________
Responding variable: _______________________________________

Answers

Answer:

huh

Explanation:

Not sure but maybe the answer to the first question is: the amount of water


Sorry if that’s not right

How do unicellular and multicellular organisms differ in structure and function?

Answers

Unicellular had one cell and multicellular has more than one

how are elements in the same group in the periodic table alike

Answers

C or D sorry if neither

Answer:

D. They have similar chemical properties

Explanation:

That's because they have the same number of electrons in the outer orbital

Can someone please help me with this it's for a grade.

Answers

Answer:

The Answer is 'D'

Explanation:

The diagram on the down side shows the behavior of the particles of a liquid so I suppose it is the ocean. While the top diagram shows the behavior of the particles of a gas so I am sure it's the air. Therefore I chose the last diagram because it describes exactly how you wanted in the question, which is the Ocean's water evaporating to become gas or the 'air' as we say

Thank you and I hope you like this answer!

One atom of (blank) bonded to two atoms of (blank).

Answers

Answer:

One atom of Oxygen bonded to two atoms of Hydrogen. It's a water molecule. The element consists of two identical atoms which is a diatomic molecule.

Explanation:

Answer:

One atom of Oxygen bonded to two atoms of Hydrogen. It's a water molecule. The element consists of two identical atoms which is a diatomic molecule.

Explanation:

What happens when weathering and erosion work together? A.Weathering B.Raining C.Erosion D.breaking
BRAINLIEST

Answers

Answer:

CCCCCCCCC

Explanation:

PLEASE HELP WILL GIVE BRAINLEST URGENT!!!!!!


When vinegar, an acid, is mixed with baking soda, a base, the reaction is similar to the reaction of Alka-Seltzer and water; a salt, water and carbon dioxide are produced. In two or more complete sentences, describe how your knowledge of balancing chemical equations can help you to determine the missing compound.


NaHCO3 + HC2H3O2 ⟶ ________ + H2O + CO2

Answers

Answer:

1) Carbon dioxide is the name of the gas.

2) The missing compound is  

Step-by-step explanation:

1)When ever an acid reacts with baking soda brisk effervescence of carbon dioxide gas are released.

So, when citric acid reacts with baking soda it gives salt of sodium citrate , water and carbon dioxide gas.

2)

According to law of conservation of mass:

Number of atoms on reactant sides are equal to the number of atoms on product side.

Number of atoms of an element on left hand side is equal to the number of atoms of that same element on the right hand side.

Number of hydrogen atom on reactant side = 5

Number of hydrogen atom on product side = 2+ x

5 = 2+x

x = 3

Number of carbon atom on reactant side = 3

Number of carbon atom on product side = 1 + y

3 = 1 + y

y = 2

Number of oxygen atom on reactant side = 5

Number of oxygen atom on product side = z + 3

5 = z + 3

x = 2

Number of sodium atom on reactant side = 1

Number of oxygen atom on product side = a

1 = a

The missing compound is  

Explanation:

Answer:

1) Carbon dioxide is the name of the gas.

2) The missing compound is H3C2O2Na

If you need an explanation, please ask. I hope this helps! :)

Water’s chemical formula is . One atom of bonded to two atoms of . The hydrogen atoms are to one side of the oxygen atom, resulting in a water molecule having a positive charge on the side where the hydrogens reside and a negative charge on the other side, where the oxygen atom resides. This separation
of charge on of the molecule is called
word bank:H2O,oxygen,oppiste ends,hydrogen,attached,polarity

Answers

Water’s chemical formula is H2O
One atom of oxygen bonded to two attached atoms of hydrogen.
The hydrogen atoms are to one side of the oxygen atom, resulting in a water molecule having a positive charge on the side where the hydrogens reside and a negative charge on the other side, where the oxygen atom resides. This separation
of charge on opposite ends of the molecule is called polarity

I hope this right and can help you!

When a force on an object becomes stronger, how does its motion change?

The object produces less friction.
The object gradually stops moving.
The motion of the object reduces.
The motion of the object becomes greater.

Answers

Answer: The motion of the object becomes greater.

I think it is D not to sure pls don't hate if wrong :(

Explanation:

The table shows the densities of four samples, each of the same volume.


DENSITIES OF SAMPLES

Sample Density (g/cm3)
W 5.1
X 1.7
Y 7.3
Z 3.5

Which sample has the greatest mass?

Answers

Answer:

Its Y

Explanation:

The formula for density is D=m/v therefore the formula for mass is m=d(v) since v is a constant the sample with the highest density will also have the highest mass. Meaning that Y is the answer.

Help! Please :) Thank you

Answers

First one??

I believe this is the correct answer

Which of the materials in the chart originally came from fossil fuels?

Group of answer choices

Acrylic

Cotton

Nylon

Polyester

Viscose

Answers

Answer:

Polyester

Acrylic

Nylon

Are all made of fossil fuels.

nylon the answer is nylon

help im being TIMED A batter hits two balls during practice. Ball A travels 10 meters, while ball B travels 12 meters. The batter decides to hit ball A with less force. How will this change the motion of ball B?

The motion of ball B will increase.
The motion of ball B will decrease.
The motion of ball B will stay the same.
The motion of ball B will become the same as ball A.

Answers

Answer:

c

Explanation:

The batter aint changing the force he is using while hitting Ball B. Therefore, Motion of ball b will stay the same :D

Answer:

The third one

The Motion of ball b will stay the same

hope this helps

Explanation:

How are the scientific method and the engineering method similar?

Both methods identify failure points.
Both methods construct a hypothesis.
Both methods focus on designing things.
Both methods work on finding solutions to problems.

Answers

The answer is Both methods work on finding solutions to problems. Because the science is trying to get the right thing and engineering is trying to solve the problem and get right thing and is the same with the science

Explanation:

strong acids and bases can be harmful to both plants and animals in our waterways. which of the following is not a consequence of acidity ?

Answers

Answer:

I think b is the correct answer

Explanation:

Answer:I think maybe C? I don’t know... I am in 6th grade and I don’t know what grade science this is...

Explanation:

I need help now god dam

Answers

Answer: 1

Explanation: Step by Step

What is it that you need help with ?

What substance do you get when you combine Bromine and Barium?

Answers

Barium bromide is the chemical compound with the formula BaBr2. Like barium chloride, it dissolves well in water and is toxic.

Materials with small, connected pores are _____.
A. Impermeable
B. Permeable
C. Unsaturated
D. Saturated
GOD BLESS AMERICA!!!!!!!!!!!
And God bless you! :)
Merry Christmas and happy new year and stay safe and have an awesome day and God bless! :)

Answers

Permeable

Because substances can move through the small pores
Permeable - I think I learned it in biology two years ago

please help me answser this, its a photo

o element
o subscribe
o coefficient

Answers

Answer:

I believe it is a element

.........

Connect as many terms that you can think of. Each term should be related to
the term at the center,
LIGHT​

Answers

Light PLEASE Thanks me I need points to ask questions
so the answer doesn’t have to be right to get points wow

At room temperature, aluminum is a solid and water is a liquid. How do the particles of the solid aluminum compare to the particles of the liquid water?
A. The particles in the liquid water and the solid aluminum are the same. They both vibrate and move slowly.
B. The particles in the solid aluminum vibrate and are tightly packed, and the particles in liquid water slide past each other.
C. The particles in the liquid water vibrate and are tightly packed and particles in the solid aluminum slide past each other.
D.The particles in the solid aluminum are close together with no regular arrangement, and the particles in the liquid water are well separated with a regular arrangement.

Answers

Answer:

B

Explanation:

The particles in the solid aluminum vibrate and are tightly packed, and the particles in liquid water slide past each other. The particles in the liquid water vibrate and are tightly packed and particles in the solid aluminum slide past each other.

Hope this helps, have a good day : )

AHAHA KENMA SUPREMACY

Answers

YESSSSS I ADORE HIM-

I need this-

kenma is just-

4 QUESTIONS PLEASEEE HELP WILL GIVE BRAINLIEST!!!!
1. How are features like trenches, plains, ridges and valleys formed on the ocean floor?
2. Where does 90% of the marine life live in oceans?
3. a. Where are nutrients abundance? b. Where do these nutrients come from?
4. How do organisms deep I the ocean get their nutrients?

Answers

Answer:

1. Converging and Diverging plates

2. In the sunlit zone

3. a.Close to coastlines and upwelling zones b. Nutrients are brought to the surface ocean from depth by the upwelling process

4. Dead organic matter that come from phytoplankton and other plants

Answer:

1. Converging and Diverging plates

2. In the sunlit zone

3. a.Close to coastlines and upwelling zones b. Nutrients are brought to the surface ocean from depth by the upwelling process

4. Dead organic matter that come from phytoplankton and other plants

Explanation:

Water is less dense as ice than liquid

Your answer:

true


false

Answers

Answer:

Solid water, or ice, is less dense than liquid water. Ice is less dense than water because the orientation of hydrogen bonds causes molecules to push farther apart, which lowers the density.

Explanation:

Answer:

false

Explanation:

Hope that helps!!

What element has the most Protons/ Neutrons/ and electrons.

Answers

Answer:

gold

Explanation:

EASYYYYYYYYYYY A batter hits two balls during practice. Ball A travels 10 meters, while ball B travels 12 meters. The batter decides to hit ball A with less force. How will this change the motion of ball B?

The motion of ball B will increase.
The motion of ball B will decrease.
The motion of ball B will stay the same.
The motion of ball B will become the same as ball A.

Answers

Answer:

The motion of ball B will increase

Explanation:

Because if you hit ball A with less force than ball B then that means that ball B will go faster because you had hit ball A will less force witch will not be as faster as ball B.

Answer:

The first one

Explanation:

Can you help answer BOTH questions pleaseee!!!

Answers

1 and 2 is 10,400 and 12.5
Other Questions
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