Answer:
the particles in a solid are closer together, which means the vibration of the sound wave transmit more quickly.
Below are atomic-scale models of two different substances. Use the terms in the word bank to label these models. Use each of the terms only once.
Top box :-
Denoted to one ClHence it should be atom
#Top right box
Denoted to KCl and CH_4 moleculesHence answer should be molecules
#Bottom left:-
Denoted to Whole branching of KCl h.ce it's repeating atom group
#Last
CH_4 's extended structure is shown hence it's extended structure
What happens to an object if the total of the forces acting on it are greater than zero?
Select one:
Nothing will happen to the object.
The object’s motion will change.
The object will move forward.
The object’s motion will remain the same.
a major use of magnesium oxide is as a refractory material.
explain in terms of structure and bonding, why magnesium oxide has a very high melting point.
[ this is 4 marks, please provide a good answer ]
[ giving brainliest + thanks on profile ]
Sodium oxide has a high melting point because of the strength ofits bonds. Due to having strong bonds, they cannot be broken veryeasily. Magnesium chloride is ionic compound. There is a strong electrostatic force of attraction between 2 chloride atoms and 1 magnesium atom.
Because it retains its strength at very high temperatures. It is considered a refractory material with a melting point of 6500 degrees F. It is also very non-reactive with other materials that might be put into the furnace and is even used to make crucibles - containers used to melt other substances.
what are some consequences of water pollution?
Answer:
At the bottom
Explanation:
-Destruction of aquatic flora and fauna
-Economic downturns
-serious health problems
And more!! We need to beware of our actions
What do you think happens to the oxygenated blood after it enters the left ventricle?
Explanation:
The oxygenated blood is brought back to the heart by the pulmonary veins which enter the left atrium. From the left atrium blood flows into the left ventricle.
To calculate acceleration you must
Select one:
multiply the force and mass
add the force and mass
divide the mass by the force
divide the force by the mass
A person riding a bicycle wants to move the bicycle forward. She moves her legs up and down on the bicycle's pedals. Then the rider wants to stop the bicycle. She stops pedaling and the bicycle slows. She takes one of her feet off a pedal and puts her foot on the ground to stop the bicycle and stay upright.
Which of these best identifies a pathway of systems in the rider's body, as described in this scenario?
A person riding a bicycle wants to move the bicycle forward. She moves her legs up and down on the bicycle's pedals. Then the rider wants to stop the bicycle. She stops pedaling and the bicycle slows. She takes one of her feet off a pedal and puts her foot on the ground to stop the bicycle and stay upright.
Which of these best identifies a pathway of systems in the rider's body, as described in this scenario?
nervous system > musculoskeletal system > circulatory system > nervous system
musculoskeletal system > nervous system > circulatory system > musculoskeletal system
musculoskeletal system > circulatory system > musculoskeletal system > nervous system
nervous system > musculoskeletal system > nervous system > musculoskeletal system
Answer:
nervous system>musculoskletal system>circulatory system>nervous system
Explanation:
How is a mixture such as a plate of pasta different from a mixture such as air
Answer:
Well there is a lot of differences between the two. Its called homogeneous and Heterogeneous mixtures. Homogeneous mixtures are all the substances are evenly distributed throughout the mixture (salt water, air, blood). Heterogeneous mixtures are the substances that are not evenly distributed (chocolate chip cookies, pizza, rocks). So Pasta with sauce and meatballs is heterogeneous and air is homogeneous
HOPE THIS HELPS HAVE A GREAT DAY!!~
Explanation:
When excess _____ flow into an aquatic ecosystem, a chain of events may take place which leads to a low dissolved-oxygen level in the water. This is called eutrophication.
Group of answer choices
nutrients
gas particles
water and sand
solid substances
Answer:
solid substances
Explanation:
In an ionic bond, electrons are ___________________. Choose all the apply.
(12pts + Brainlest)
1. gained
2. lost
3. shared
4. neutral
Answer:
Electrons are shared.
Explanation:
In an ionic bond, electrons are gained and lost. So, the correct options are A and B.
What is an ionic bond?An atom can establish bonds with other atoms in two main ways: covalent and ionic. The sharing of electrons between two or more atoms forms a covalent connection. When two or more ions join contact, they can create ionic bonds that are held together by charge differences.
A chemical link in which one atom transfers one or more electrons to another atom is known as an ionic bond. A negatively charged ion, or anion, is created when an atom receives electrons, while a positively charged ion, or cation, is created when an atom loses electrons. The ions' opposing charges draw to one another and create a solid link between them. Usually, a metal and a non-metal atom form ionic connections. Ionic bonds contain electrons.
So, the correct options are A and B.
Learn more about Ionic bonds, here:
https://brainly.com/question/11527546
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Match the term with its description.
Acid:
Base:
Ions:
pH:
Definition:
A value from 0 to 14 is used to specify how acidic or basic a compound is when it is dissolved in water
Used to measure the pH of substances by determining their hydrogen ion concentration
A compound that increases hydroxide ions (OH−) when it is dissolved in a solution
A compound that increases hydrogen ions (H+) when it is dissolved in a solution
A value from 0 to 14 is used to specify how acidic or basic a compound is when it is dissolved in water= pH
A compound that increases hydroxide ions (OH−) when it is dissolved in a solution= Acid
A compound that increases hydrogen ions (H+) when it is dissolved in a solution= ions
Used to measure the pH of substances by determining their hydrogen ion concentration= base
Answer: pH goes with A value from 0 to 14 is used to specify how acidic or basic a compound is when it is dissolved in water
base goes with A compound that increases hydroxide ions (OH−) when it is dissolved in a solution
ions goes with Used to measure the pH of substances by determining their hydrogen ion concentration
acid goes with A compound that increases hydrogen ions (H+) when it is dissolved in a solution
Explanation: i took the test and got it right
In the Tough Man Competition, very strong men are challenged to push or pull extremely large and heavy objects to test their strength. In one such challenge, they were asked to push one of two rail cars, an engine car and a box car. The data tables show one man’s results. Look over the data table and answer the questions below.
A. Why couldn't the strong man move the box car with a force of 3000 Newtons? Make sure to include Newton's 2nd Law in your explanation.
B. What could be done to move the boxcar?
C. Another student claims that during the competition, the sum of the forces on the boxcar was 0 N. What evidence is the student using to make this claim? Be sure to explain your thinking.
How does this support the theory that whales evolved from walking mammals? in embryo evidence
Answer:
A embryo's, Whales have small back limbs which disappear before birth.
Explanation:
There are lots of evidence in a whale's body and biology suggesting its ancestors lived on land. They have paddle-shaped flippers that encase hand bones with five 'fingers,' and they breathe air and feed their young with their own milk.
How can speed be described?
Select one:
The mass multiplied by the acceleration of an object.
The force on an object divided by the mass of an object.
The distance an object travels at a certain velocity.
The distance travelled by an object in a certain time.
Answer:
The mass multiplied by the acceleration of an object.
Explanation:
Please give brainliest, It's not much, but it's honest work.
What is the working resistance of a bulb that takes a current of 0.25 A when it is connected to 220V mains supply?
Answer:
880 Ω (Ohms)
Explanation:
To calculate Resistance from Potential Difference (Volts) and Current (Amps), you use the equation R = V/I
So,
R = 220/0.25
R= 880
Which two substances are among the four major types of organic compounds made by living things?
A. Phosphates
B. Nitrates
C. Proteins
D. Lipids
Answer:
D:)
Explanation:
Lipids
HELP NEED THIS DONE BEFORE 9:45!!!!!!!!!!!!!!!! WILL GIVE 100 POINTS AND BRAILIEST IF DONE BEFORE 9:45!!!!!!!!!!!!!
Answer:
1.) 742.57 m/s
2.) 132
3.) 4.375 hours
4.) 1080
5.) 81.6 km per hour
6.) 20 min = 1,200 secs1000 / 1200
Explanation:
Your Welcome!
Answer:
1.) 742.57 m/s
2.) 132 m
3.) 4.375 hours
4.) 1080 m
5.) 81.6 km per hour
6.) 20 min = 1,200 secs1000 / 1200
Explanation:
**Brainliest would be appreciated**
Which of these shows the common stages of growth for a flowering plant?
leaves, seed, shoot, root system, stem or trunk, flowers
stem or trunk, root system, seed, shoot, leaves, flowers
seed, shoot, root system, stem or trunk, leaves, flowers
flower, seed, shoot, stem or trunk, root system, leaves
Answer:
everything because every part are equally responsible for the growth of plant
Why does the Earth experience two high and two low tides each day?
The moon orbits the Earth twice as fast as the sun.
The moon orbits the Earth completely once per day.
The moon and the sun create their own high and low tides.
The moon passes over the same location above the Earth's surface twice per day.
THIS IS SCIENCE If you answer this please make two sides or list which go on each one whether it is Terrestrial or Jovian. I will give brainliest!
Compare terrestrial and Jovian planets below by writing each characteristic in the correct
category.
• less massive
• more massive
• many moons
• smaller volume
• zero to two moons
• farther from the Sun
• some contain ring systems
• larger volume
• closer to the Sun
• composed mostly of gases
• longer revolutionary period
• shorter revolutionary period
• composed of silicate rocks and metals
• geologic features like craters and mountains
Answer:
geologic features like craters and mountains
Explanation:
when i did this my teacher said it was ok
Part A Cut off the top and one side of the milk carton as shown. Use the hole punch (or scissors) to make two holes on opposite sides of the carton. Make sure the holes are low enough for the rubber band to launch the car. Thread the rubber band through the holes, and secure it using paper clips. Stretch the rubber band to launch the toy car away from the box. Pull back the rubber band to different distances, and explain what happens.
Answer:
the harder you pull on the rubber band the further the toy launches.
Explanation:
because i got it right and its common sense
What is displacement?
Select one:
The direction an object moved.
The time it takes for an object to move a certain distance.
The distance an object moved.
An object’s change in overall position.
Answer:
The change in overall position
Explanation:
Which vein carries oxygenated blood back into the heart?
Answer:
The veins that carry oxygenated bloof back into the heart are the pulmonary arteries.
Explanation:
Oxygen-rich blood flows from the lungs back into the left atrium (LA), or the left upper chamber of the heart, through four pulmonary veins. Oxygen-rich blood then flows through the mitral valve (MV) into the left ventricle (LV), or the left lower chamber.
Answer:
The veins that carry oxygenated bloof back into the heart are the pulmonary arteries.
Explanation:
How can speed be described?
Select one:
The mass multiplied by the acceleration of an object.
The force on an object divided by the mass of an object.
The distance an object travels at a certain velocity.
The distance travelled by an object in a certain time.
The correct answer is: [D]:
___________
→ " The distance traveled by an object in a certain time."
___________
Explanation:
Choice: [A]: "the mass multiplied by the acceleration of an object."
refers to: "force". " F = m*a " . → Rule out: Choice: [A].
___________
Choice: [B]: "the force on an object divided by the mass of an object."
refers to: "acceleration". " F /m = a ". → Rule out: Choice: [B].
___________
Choice: [C]: "the distance an object travels at a certain velocity."
refers to: " the time period traveled at a specific speed AND direction."
___________
Choice: [D]: " the distance traveled by an object in a certain time"."
refers to: "speed". → which is our answer!
___________
Note: " speed = distance / time "; That is: " s = d/t " ;
Note that for "speed" ; the "direction of travel is irrelevant."
→ So; we can rule out: "Choice: [C]."
___________
The correct answer is: Answer choice: [D]:
→ " the distance traveled by an object in a certain time."
___________
Hope this is helpful to you in some way! Best wishes!
___________
What is a sedimentary rock?
A. a type of rock that is formed over long periods of time by layers of silt building up on the floor of a body of water
B. a type of rock formed over long periods of time by the cooling and solidification of molten Earth material
C. a type of rock that is formed in a very short period of time by sudden violent volcanic eruptions into the ocean
D. a type of rock that is formed over long periods of time by the transformation of existing rock types
Answer:
answer is D
Explanation:
sedimentation is the process to make the sedimentary rock. they are formed by using minerals or fossils or other rock types
can someone help me w this? A pneumonic device is a memorization tool that helps you remember things. For example, if you can read music you probably have heard, “Every Good Boy Does Fine” to learn the names of the lines on the treble clef EGBDF. Or maybe your math teacher taught you, “Please Excuse My Dear Aunt Sally,” to help you remember the order of operations. It is now your turn to think of a pneumonic device to remember the water cycle in order. Write your pneumonic device below.
Charlie took Edward's pencil
Carson tames emperor penguins
Is the Artic considered a desert? why or why not?
Answer:
Both, much of the artic is a desert including the artic basin, Canadian Artic Archipelgo, and the north pole because the average precipitation is between 150-250mm. This is below 250mm which is the agreed level to be considered a desert.
can someone help me w this? A pneumonic device is a memorization tool that helps you remember things. For example, if you can read music you probably have heard, “Every Good Boy Does Fine” to learn the names of the lines on the treble clef EGBDF. Or maybe your math teacher taught you, “Please Excuse My Dear Aunt Sally,” to help you remember the order of operations. It is now your turn to think of a pneumonic device to remember the water cycle in order. Write your pneumonic device below.
Water cycle stages: Evaporation, Transpiration, Condensation, Precipitation
Edward took Charlie's pencil
Part H In parts E, F, and G, which data sets (corrective lenses, glasses, or contacts) show the most similar variation between Doctors?
Answer: Doctor A Corrective Lenses: 745, 726, 769, 765, 756, 742, 757, 748, 770,
Explanation: I took the test! i have a great day :)
DO mutations only form from natural factors?
Answer:
Mutations occur throughout the natural world.
Explanation:
-A-Astro