CHEMISTRY HIGH SCHOOL

Select all that apply. 1: Which of the following particles are of approximately equal mass?

A: protons
B:electrons
C:neutrons
D:quarks
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2: If the atomic number of an element is 16, then it has 16 electrons.

True
False
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3: An unknown substance is tested and found to have the following physical properties:

brittle
fair conductor of electricity
dull (not shiny)

The substance is most likely a _____.

A:metal
B:metalloid
C:nonmetal
D:can not be determined without more data
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Answers

Answer 1
Answer:

1)Protons and Neutrons have approximately equal masses

2)TRUE

3) B-Metalloid

Answer 2
Answer:

Answer:

its a and b

Explanation:

i got it right on test


Related Questions

MIDDLE SCHOOL

Which type of elements are lanthanides and actinides part of? inner transition metals

noble gases

halogens

metals

Answers

Inner transition metals
HIGH SCHOOL

The measure of a compounds likeliness to gain or lose an electron is its

Answers

Answer:

Is its electrification

Explanation:

Electrification is defined as the ability to gain or lose different electrical charges, usually electrons, and occurs when a collision of subatomic particles occurs. There are three ways to electrify: by rubbing, by contact or by induction. It is necessary to take into account that in these three ways of electrification, the principles of charge conservation and the primary electrostatic rule are present.

Weight is the answer ig

HIGH SCHOOL

What happen once intercellular signals reach the inside of the cell using some type of receptor A. The signal stops

B. The signal produces a protein

C. The signal is transferred to the cytoplasm

D. Intercellular communication takes over

Answers

Answer:

Correct option is B.

B. The signal produces a protein  

Explanation:

There are many kinds of signals that reach the inside of cell. Every signal carry some important message regarding the functioning of cell or any other part of body. Normally signals that penetrate in the cell translate a protein to carry out their function. So, signals actually stimulate the machinery of the cell and make it to produce the protein of its own desire.

Once intercellular signals reaches inside of the cell by the receptor then it helps in the intercellular communication among each other.

Further Explanation:

The receptors are usually the proteinaceous structure that resides over the surface of the cell as well as present inside it. It receives signals in various forms. These signals may only interact with the receptor on the outer surface of the cell or it may reach inside the cell and interact with the receptor molecule. The interaction may result in the manipulation in the transcription process as some of the genes will be stimulated to transcribe into the protein or some may get inhibited.

There can by different types of signal molecule. They are:

1. Autocrine: These signals are produced by the cell type to which the signaling molecule get attached. Therefore they acts over self-cell. This kind of signaling happens in the early development of an organism.

2. Paracrine: These signals produced by the signaling cell acts locally on the cell that lies closer to them.They generally produces faster response.

3. Endocrine: These signals travels to the longer distance and acts over the cells residing over there. They generally produces slower response.

Learn more:

1. Learn more about receptor brainly.com/question/7178431

2. Learn more about cell brainly.com/question/5923583

3. Learn more about cell cycle brainly.com/question/1600165

Answer Details:

Grade: College Biology

Subject: Biology

Chapter: Signal transduction

Keywords:

Intercellular signals, receptor, intercellular communication, transcription, autocrine, cell, organism, paracrine, endocrine.

HIGH SCHOOL

What element is added to toothpaste and city water systems to help tooth decay?

Answers

Fluoride is the element that is added to city water supplies and toothpastes to prevent tooth decay. According to research, fluoride helps to prevent tooth decay as it can reduce cavities by 24% and by boosting the production of saliva. Saliva helps to protect the tooth enamel by providing high levels of calcium and phosphate ions to the surface of the tooth.
MIDDLE SCHOOL

What is chemistry and biochemistry​

Answers

Answer:

Chemistry mainly deals with study of physical and chemical properties of organic and inorganic matters but biochemistry involves mainly study of compounds (mostly organic compounds) of Biomedical interest.

HIGH SCHOOL

Compute 4.659×104−2.14×104. Round the answer appropriately.

Answers

The answer is 2.519 × 10^4. Use the distributive property: a × x + b × x = (a + b) × x. If a = 4.659, b = 2.14, and x = 10^4, then 4.659 × 10^4 − 2.14 × 10^4 = (4.659 - 2.14) × 10^4. Now, subtract numbers in parenthesis: 4.659 × 10^4 − 2.14 × 10^4 = (4.659 - 2.14) × 10^4 = 2.519 × 10^4.Hope this helps. Let me know if you need additional help!
HIGH SCHOOL

All are ways to increase mechanical advantage except

Answers

When you increase the mechanical advantage you pay for it by have to move the effort a greater distance.
So test each of the list and decide whether when using the machine you increase or decrease the distance moved by the effort.
Start with the inclined plane and consider lifting a load with or without the inclined plane
MIDDLE SCHOOL

A scientist did an investigation on the growth of koi fish. He selected forty newly hatched koi from the same clutch of eggs. He separated the koi into four groups and placed each group in a different sized pond. None of the ponds had any predators that would eat the koi fish. The amount of food available to the koi and the water quality of each pond differed based on the size of the pond. Larger ponds had more food available and better water quality as the fish grew. After 15 months, the scientist measured the length of each koi fish. Using these measurements, he came up with an average koi size for each pond.

Effect of Pond Size on Koi Fish Growth

Size of Pond Average Length of Koi
500 gallons 18.2 centimeters
1000 gallons 25.6 centimeters
2500 gallons 30.8 centimeters
5000 gallons 35.3 centimeters

Based on the scientist's results, which of the following is true?
A.
Koi fish grow fastest in ponds with poor water quality.
B.
Koi fish grow fastest in ponds with a high population density.
C.
The growth of koi fish is determined entirely by genetics.
D.
The growth of koi fish is affected by the environment of the fish.

Answers

From the results, it is clear that, the growth of the koi fish is depending on the environment in which it grows. This include, the size of pond, food available, water quality, presence of predators etc. Hence, option D is correct.

What are environmental factors affecting fish growth ?

The condition of the water in which fish are grown directly affects their health and eventual growth. In general, physical, chemical/biochemical, or a combination of these components can be used to categories factors impacting fish growth and productivity in freshwater aquatic systems.

Temperature and suspended and settleable particles concentrations are significant physical water characteristics for the development and growth of fish; crucial chemical water characteristics include pH, alkalinity, hardness, and metal concentrations.

The adequate size of pond let the fish free to move more and make it more energetic with the surroundings. Hence, the growth of koi fish is affected by the environment of the fish.

Find more on koi fish:

brainly.com/question/28895961

#SPJ3

Answer:

d

Explanation:

just did it

COLLEGE

Think about a carbon atom that is released into the atmosphere from the burning of wood in a campfire. If it were to go through the whole carbon cycle, Step 1 A caterpillar gets the carbon by eating the tree's leaves.
Step 2 The bird decomposes and the carbon is added to the atmosphere.
Step 3 A bird gets the carbon by eating the caterpillar.
Step 4 The bird flies into a building and dies instantly. It falls to the ground
Step 5 A tree absorbs the carbon from the atmosphere into its leaves for photosynthesis.
plz help me by telling me what order this go's in?

Answers

Answer:  the actual answer is

step 1: A tree absorbs the carbon from the atmosphere into its leaves for photosynthesis

step 2: A caterpillar gets the carbon by eating the tree's leaves

step 3: A bird gets the carbon by eating the caterpillar

step 4: The bird flies into a building and dies instantly. It falls to the ground

step 5: The bird decomposes and the carbon is added to the atmosphere

Explanation:

1) Step 5 A tree absorbs the carbon from the atmosphere into its leaves for photosynthesis. Inorganic carbon is turned into organic.
2) Step 1 A caterpillar gets the carbon by eating the tree's leaves. Caterpillar use carbon for energy.
3) Step 3 A bird gets the carbon by eating the caterpillar. Organic carbon shifts from one animal to another
4) Step 4 The bird flies into a building and dies instantly. It falls to the ground.
5) Step 2 The bird decomposes and the carbon is added to the atmosphere. Organic carbon turns into inorganic.
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