1.What is a non example of constant?
2.What is an example of constant?
Answer:
1. A non example of a constant in physics is a value that changes. For example, the temperature of Hong Kong, let's say, is not a constant, since it changes and does not stay at the same value. It gets higher in the summer and lower in the winter.
2. An example of a constant in physics would be the gravitational acceleration of the Earth. Since the Earth's mass' changes is negligible when compared with the overall mass of the Earth (unless something big happens, of course, like a meteor or asteroid), the gravitational acceleration on Earth is largely unchanged, even constant from our viewpoint.
Explanation:
Hope this helped!
Answer:
a science experiment, the controlled or constant variable is a variable that does not change. For example, in an experiment to test the effect of different lights on plants, other factors that affect plant growth and health, such as soil quality and watering, would need to remain constant. a dependant variable(opposite)would be the properties of the plants themselves, which the scientist is observing in relation to the changing light. These properties might include the plants' color, height and general health of the plant
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A piece of unknown metal with mass 68.6 g is heated to an initial temperature of 100 °C and dropped into 42 g of water (with an initial temperature of 20 °C) in a calorimeter. The final temperature of the system is 52.1°C. The specific heat of water is 4.184 J/g*⁰C. What is the specific heat of the metal?Identify a potential source of error that may have occurred during the calorimetry experiment. Justify your response in two or more complete sentences.
According to the mass of the metal and the temperature it should be under the average heat of water which is 4.184 but also above it, which brings us back to how much it dropped which means that it goes back and going half way.
How do we determine how many protons are in an element: options:
A. Isotopes
B. Atomic mass - atomic number
C. atomic number
D. atomic mass
Answer: B:)
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Which subatomic particle has a positive charge? options:
Neutron
Electron
all of the above
Proton
Answer:
proton
Explanation:
pro + positive neutron =neutral and electron= negative
how is mitochondria like the digestive system?
The mitochondia takes in nutrients and then breaks it down like the digestive system.
Explanation:
How many electrons are in an element with an atomic number of 20 and an atomic mass of 40? options: ANSWER FOR BRAINLIES
A. 40
B. 20
C. 60
D. 0
Answer:
B
Explanation:
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Read this excerpt from Through the Looking-Glass by Lewis Carroll.
“That would never do, I'm sure,” said Alice: “the governess would never think of excusing me lessons for that. If she couldn't remember my name, she'd call me ‘Miss!’ as the servants do.”
“Well, if she said ‘Miss,’ and didn't say anything more,” the Gnat remarked, “of course you'd miss your lessons. That's a joke. I wish YOU had made it.”
“Why do you wish I had made it?” Alice asked. “It's a very bad one.”
But the Gnat only sighed deeply, while two large tears came rolling down its cheeks.
“You shouldn't make jokes,” Alice said, “if it makes you so unhappy.”
Then came another of those melancholy little sighs, and this time the poor Gnat really seemed to have sighed itself away, for, when Alice looked up, there was nothing whatever to be seen on the twig, and, as she was getting quite chilly with sitting still so long, she got up and walked on.
Question:
How does Lewis Carroll’s use of opposites appear in this excerpt?
Answers:
1#. Alice says that her governess would never excuse her from her lessons, even if she 2#. did not have a name.
3#. The gnat jokes that Alice would have to miss her lessons if the governess called her “Miss.”
4#. The gnat makes jokes, but they seem to cause him unhappiness rather than joy.
5#. The gnat disappears after he lets out one last sigh and Alice looks up at the tree.
Answer:
4
Explanation:
Answer:
D
Explanation:
ASAP HELP PLS
Amy has a mass of 30 kg, and she is riding a skateboard traveling 5 meters per second.
What is her momentum?
5 kg⋅m/s
6 kg⋅m/s
30 kg⋅m/s
150 kg⋅m/s
Answer:
A is correct
Explanation:
Momentum is the product of mass and velocity of the moving object. The momentum of Amy weighing 30 Kg riding with 5 m/s is 150 Kg m/s.
What is momentum?Momentum is a physical quantity measuring the product of mass and velocity of a body. There are both linear momentum and angular momentum. Angular momentum is the momentum associated with a rotating body.
Momentum of a body increases with increase in mass and velocity.
The mass of the girl is given 30 Kg riding with a velocity of 5 m/s. Thus her momentum can be calculated as:
p = m v
= 30 Kg × 5 m/s
= 150 kg m/s.
Therefore, the momentum of Amy is 150 Kg m/s.
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Saturn isn’t the only planet with rings, but they are the most beautiful ones.
Fact or Opinion?
Answer:
opinion
Explanation:
i could call somthing beautiful ex. a bird but call another bird ugly
Objects too far away from the Sun do not orbit it. Explain why this occurs.
Answer:
The Sun's gravitational pull is not as strong as objects get farther away
Explanation:
Answer:
The answer would probably be gravitational pull
Explanation:
The farther an object is from the sun and the slower it will orbit the sun. If an object is closer from an other star than to the sun, or the field of attraction of this star is stronger than the one of the sun, this object will not orbit the sun at all.
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Breaking a pencil in half is an example of: options:
A. nuclear change
B. physical change
C. chemical change
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A science teacher shows his students an image of a volcanic mountain range and informs them it was created by the movement of Earth’s tectonic plates. He asks his students to explain how this occurred. Which student’s explanation is best?
Student A
An oceanic plate converged with an oceanic plate. Both plates subducted, forcing lava upward towards the surface of the Earth causing a volcanic eruption which created the mountains.
Student B
A continental plate converged with a continental plate. Neither plate subducted so lava was forced upward towards the surface of the Earth causing a volcanic eruption which created the mountains.
Student C
An oceanic plate converged with a continental plate. The more dense, continental plate sank below the less dense oceanic plate causing magma to rise up through a weak spot in Earth’s crust to create volcanic mountains.
Student D
An oceanic plate converged with a continental plate. The more dense, oceanic plate sank below the less dense continental plate causing magma to rise up through a weak spot in Earth’s crust to create volcanic mountains.
A.
Student B
B.
Student A
C.
Student C
D.
Student D
Answer:
Student B
Explanation:
I think
Answer:
student b
Explanation:
What property describes the ability of a material to be flattened into thin sheets by hammering? options:
A. flammability
B. boiling point
C. ductility
D. malleability
Answer:
d. malleability
Explanation:
i think
All known matter is made up of Question 1 options:
A. molecules
B. legos
C. solids
D.atoms
the answer is (a) molecules
Answer:
D. Atoms
Explanation:
You are made of matter, everything you touch is made of matter if your at a desk thats matter. Therefore the answer is Atoms
How is the kinetic energy of the particles that make up a substance different
after it changes state?
O A. The kinetic energy is greater after a substance changes from a
plasma to a gas.
O B. The kinetic energy is greater after a substance changes from a
liquid to a solid.
O C. The kinetic energy is less after a substance changes from a liquid
to a gas.
O D. The kinetic energy is less after a substance changes from a gas to
a liquid.
Answer:
a
Explanation:
i think
Which subatomic particle has a positive charge options:
A. Neutron
B. Electron
C. all of the above
D. Proton
A car engine uses the combustion of fuel to move a system of gears that
move its wheels. Not all of the fuel's energy is transferred to the wheels.
Which two transformations happen to the rest of the energy?
I A. It is transformed into sound energy.
O B. It is transformed into thermal energy.
I c. It is transformed into chemical energy.
D. It is transformed into nuclear energy.
E. It is transformed into kinetic energy.
Answer:
A and B
Explanation:
When a car engine uses the combustion of fuel to move a system of gears that move its wheels, the fuel's energy is transferred to the wheels and the rest of the energy: is transformed into sound energy and thermal energy. So, option (A) and (B) are correct.
What is law of conservation of energy?Energy cannot be created or destroyed, according to the rule of conservation of energy. However, it is capable of change from one form to another. An isolated system's total energy is constant regardless of the types of energy present. The law of energy conservation is adhered to by all energy forms.
In a nutshell, the law of conservation of energy asserts that the system's total energy is conserved in closed systems, or systems that are separated from their environment.
When car engine uses the combustion of fuel to move a system of gears that move its wheels, maximum of its energy transformed into kinetic energy and rest of energy is dissipated in a form of sound energy and thermal energy. So, option (A) and (B) are correct.
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In your own words answer the following essay question use 5-7 sentences:
Why does a car’s engine become hot while it is running?
Answer:
Engines can overheat for many reasons. In general, it's because something's wrong within the cooling system and heat isn't able to escape the engine compartment. The source of the issue could include a cooling system leak, faulty radiator fan, broken water pump, or clogged coolant hose
Explanation:
2 spheres are made from the same material. One is smaller and one is larger. Is the smaller sphere made up of smaller atoms than the larger sphere?
Answer:
No
Explanation:
It’s just made up of less atoms.
What will happen when you slide the sponges in different directions?
Transform boundary
is the answer from stemscopes
The sponges will contract when there is a slide of sponges in different directions.
What are the sponges?Sponges are called as the members of the phylum Porifera. This is a basic animal group and the diploblasts' sibling. They are multicellular creatures with pores and channels that let water to move through their bodies, which are made of jelly-like mesohyl sandwiched between two thin layers of cells.
Sea sponges were among the earliest animal groups to form on Earth, but new chemical evidence puts their appearance 120 million years earlier than previously assumed, according to New Scientist.
According to the research, it is found that When there is a sliding of sponges in opposite directions, the sponges will compress. As water filters through the porous shell of a sponge, it develops motion, obtains food and oxygen, and expel waste.
Therefore, Flagella, microscopic hairlike structures inside the sponge, produce currents that filter germs out of the sponge's cells and trap food within them.
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The nucleus is found in the center of an atom options: True False
what is santa's average speed when visiting houses if he visits 800 million houses over 48 hours?
Well, "speed" normally = (total distance covered) / (time to cover the distance).
In this case, we don't know the total distance that Santa has traveled, so the question can be answered only if we're willing to consider some other meaning of "speed".
Maybe we could say that in this case, "speed" means the average rate at which he visits houses. Then ...
Speed of visits = (total houses visited) / (time to visit them).
Speed of visits = (800 million houses) / (48 hours)
Speed of visits = 16.67 million houses per hour.
That's 277.8 thousand houses per minute
That's 4,630 houses per second
How did the iron filing patterns show attractive forces between magnetic poles?
When the magnet is placed on the glass, it is attracted to the iron filings. The pattern of the iron filings shows that the lines of force that make up the magnetic field of the magnet. Also, The lines of force of north and south poles attract each other whereas those of two north poles fend off each other.
Answer:
When the magnet was placed on the glass, it attracted the iron filings. The pattern of the iron filings shows the lines of force that make up the magnetic field of the magnet. ... The lines of force of north and south poles attract each other whereas those of two north poles repel each other.
Explanation:
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how does a balanced chemical equation represent the conservation of matter in a chemical reaction?
a. the type of matter in the products is different from the type of matter in the reactants.
b. there are more atoms in the reactants than in the products.
c. there are fewer atoms in the reactants than in the products.
d. the number of atoms of each element in the reactants equals the number of atoms of each element in the products.
Answer:
d
Explanation:
Read this excerpt from Through the Looking-Glass by Lewis Carroll.
“This must be the wood,” she said thoughtfully to herself, “where things have no names. I wonder what'll become of MY name when I go in? I shouldn't like to lose it at all—because they'd have to give me another, and it would be almost certain to be an ugly one. But then the fun would be trying to find the creature that had got my old name! That's just like the advertisements, you know when people lose dogs—‘ANSWERS TO THE NAME OF “DASH”: HAD ON A BRASS COLLAR’—just fancy calling everything you met ‘Alice,’ till one of them answered! Only they wouldn't answer at all if they were wise.”
What is being compared in the simile from this excerpt?
ANSWERS:
A. Alice is comparing the idea of finding a creature with her name to a missing dog poster.
B. Alice is comparing the wood where things have no names to the woods from her old world.
C. Alice is comparing losing her old name to gaining her new name.
D. Alice is comparing having a nice name to having an ugly name.
Answer:
A
Explanation:
The answer is A. :)
PLEASE HELP ME ASAP!!! THIS IS DUE IN 20 MINUTES!! Tell if Rusting (Oxidation) is a Physical or Chemical Change. Also, explain what it means and give an example.
I WILL GIVE BRAINLIEST TO THE BEST ANSWER!!!
Redox reaction is the oxidation of iron, which forms iron oxide, also known as rust. This reaction can be symbolized with the following equation: 2Fe + 3O2 forms Fe2O3. Notice the iron atoms and oxygen molecules combine to form a new compound, which makes this reaction a chemical change.
An ice cube melting into water is an example of: options:
A. physical change
B. nuclear change
C. chemical change
QUESTION 2
Non-metals are found where on the periodic table?
A. Everywhere
B. Center
C. Lower left side
D. Upper right side
A. physical
D. Upper right
Answer:
1.) A, a physical change
2.) D, Upper right side
Explanation:
1.) Changing states does not atomically change the chemical build up of any object. Water is still water whether as liquid H2O, ice, or water vapor. Since it is only changing how an object looks and not the chemically make up, melting and freezing constitutes as physical changes
2.) Non-metals are elements that do no share the traits and characteristics of a metal. Most non-metals classify as a gas. This includes : helium, hydrogen, oxygen, carbon, nitrogen, and sulfur just to name a few.
Where are all these elements found on the table? The right sides of the periodic table.
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What type of properties are being used to describe an unknown object by giving the size, color, shape and mass? options:
A. Chemical Properties
B. Physical Properties
