A. atoms because they are the smallest building blocks of matter. There is nothing smaller than atoms
1. Ba(OH)2
What is the compound
Answer:
BARIUM HYDROXIDE IS THE COMPOUND
A scientist wants to determine how temperature affects photosynthesis? He sets up a controlled experiment in which he places small plants acquired from an aquarium store into 3 separate test tubes. He pours 20 ml of cold water into one test tube, 20 mL of room temperature water into the second test tube, and 20 mL of warm water into the third test tube. He covers each test tube with a small latex balloon and measures the circumference of each balloon after 2 days. What is the test (independent0 variable?
Answer:
Independent variable: DIFFERENT TEMPERATURE
Explanation:
The independent variable of an experiment is the variable that the experimenter changes or manipulates in order to effect an outcome or response in the measured variable/dependent variable.
In this experiment, a scientist wants to determine how temperature affects photosynthesis. He sets up the experiment by adding 20ml of water at different temperatures to three test tubes. Hence, the independent or experimental variable is the DIFFERENT TEMPERATURES GIVEN TO EACH PLANTS IN THE TEST TUBE because it is what the experimenter changes in order to effect a measurable outcome i.e. oxygen released in each balloon as a result of photosynthesis, which is the dependent variable
Thus the above response is right.
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Kinetic molecular theory is often used to describe conductors because as the ________ increase the thermal conductivity of the material increases.
atoms
collisions
weight
Answer:
B
Explanation:
Collisions
Answer:
Collisions
Explanation:
The questions talking about molecules so particles are moving around. Hope this helps
Give an example of each: mechanical energy, electrical energy, chemical energy, thermal energy, sound energy.
Answer:
Explanation:
Mechanical energy is basically "manual energy"; ex: hand held sharpener.
Electrical energy is related to electricity. ex: plug
Chemical energy: ex: chemical reaction
Thermal energy "heat". ex: stove
Sound energy "sound waves" ex: speaker
An element has this information:
15 protons, 13 neutrons, 14 electrons
What is the name of this element?
Answer:
hydrogen
Explanation:
help I have to do this before the end of the day!
Answer:
What the
Explanation: fawk
Fractional distillation is used to seperate mixture of water and ethanol. The temperature of the top of the fractioning column is lower than the temperature of the bottom. The more ..... liquid evaporates and moves further up the column. It eventually reaches the .... where the .... changes to a liquid
- Condenser
- Higher
- Crystallisation
- Solid
- Volatile
- Flask heavy
- Vapour
Answer:
condenser higher uuuu
Which of these is an example of a physical change?
O a banana ripening in the air
O hydrogen burning in the air
O zinc reacting with an acid
O liquid water turning into vapor
Answer:
liquid water turning into vapor
Answer:
shes right liquid water turing into vapor is correct
What is the shape of pure carbon fullerenes?
A. Hollow tube
B. Hollow Sphere
C. Flat layers
D. Hard, solid crystal
Answer:
The correct answer is Hollow Sphere.
N2O difference in electronegativity
Reactant P contains 50 J of energy, and reactant Q contains 35.3 J of energy. The reactants combine to form product PQ, which contains 104 J of energy. What is the energy transformation? Energy is absorbed because the product has more energy than the reactants have. Energy is absorbed because the product has less energy than the reactants have. Energy is lost because the product has more energy than the reactants have. Energy is lost because the product has less energy than the reactants have.
Answer:
Energy is absorbed because the product has more energy than the reactants have.
Explanation:
its A
yall welcome please like and give 5 starts thanks yall
what two bodies of water form a key transportation route connecting the interior of Canada to the Atlantic Ocean? and its science.
Answer:
Lake Ontario and St Lawrence Seaway
Explanation:
The Great Lakes are connected to the Atlantic Ocean through the St. Lawrence Seaway.
simple question ill name u brainiest
Answer:
Test tube :)
Explanation:
Im pretty shure its D- graduated cylendar
A flask holds much more than that a test tube doesnt have mesure meants (i dont tink so at least?) and a beaker also much more and is harder to explain..
How does the Scientific Theory of Atoms help us undersand atoms?
Answer:
Atomic theory is the scientific theory that matter is composed of particles called atoms. ... According to this idea, if one were to take a lump of matter and cut it into ever smaller pieces, one would reach a point where the pieces could not be further cut into anything smaller.
Explanation: hope this helps
Which term describes the maintenance of a steady internal state in the body?
73.
A gametogenesis
B. homeostasis
C. mitosis
D. respiration
Two forces are described below: Force 1: The force with which Earth pulls a person to its center Force 2: The pulling force applied on a door to open it Which statement is true about the forces? A) Both are contact forces. B) Both are non-contact forces. C) Force 1 is a contact force and Force 2 is a non-contact force. D) Force 1 is a non-contact force and Force 2 is a contact force. PLEASE HELP
Answer:
the correct answer is D
Answer:
It is D
Explanation:
Gravitational Force does not implie to have contact or if you want an easier explanation. Gravity doesn't touch you to move you.
Though you do need physical contact to open a door, because you are touching it!
A) A metal ruler has a
mass of 42g and a
volume of 10cm". What
is the density?
Answer:
4.2g/cm^3
Explanation:
Density is a measurement of the amount of mass of a substance can fit into a space. In order to find density you can always use the formula mass/volume (often abbreviated as m/v). In this case that would be 42/10 g/cm^3 or 4.2g/cm^3
What is the enthalpy of reaction for the decomposition of calcium carbonate?
what determines the velocity of an object
Answer:
the direction of the object
Explanation:
What gas is measured in an ICE CORE and what is the correlation between that gas and temperature?
Answer:
Explanation By looking at past concentrations of greenhouse gasses in layers in ice cores, scientists can calculate how modern amounts of carbon dioxide and methane compare to those of the past, and, essentially, compare past concentrations of greenhouse gasses to temperature. Ice coring has been around since the 1950s.n:
Answer:
oh what the guys said above me
no copying from google
what is a penumbra solar eclipse?
Answer:
Hi there!
Your answer is:
In a solar eclipse, we see two types of shadows. One is the "umbra" or the darkest shadow caused by the sun. It's located in the center.
The "penumbra" in a solar eclipse is the shadow that's lighter and located on the sides of the earth. Think about it like this:
The sun and earth are in line. The darkest shadow will continue in that line. That is the umbra. The penumbra continues directly on the outside of the umbra. It's lighter that the other shadow!
A penumbra solar eclipse is when the sun, moon, and earth DONT align properly. This causes a partial eclipse, not a full eclipse. A penumbra solar eclipse is a Partial solar eclipse.
Hope this helps! To be clear, none of this is copied. This is based off of my previous knowledge on the subject and interest in phenomena such as these!
HELPPPP
Which of the following statements is true?
Plasma can be found in lightning and comet tails.
Liquid molecules also have a strong attraction to one another.
Bose-Einstein condensates form at absolute zero.
All of the above.
Answer:
Plasma can be found in lightning and comet tails
Explanation:
hope i helped! [i got this correct in a test,hope you get it correct]
The value of the boiling point elevation constant (Kb) depends on the identity of the:_______.
a. solute
b. solvent
c. most important solvent-solute interaction
d. ions formed upon solution of an electrolyte
e. solute and solvent
The value of the boiling point elevation constant (Kb) depends on the identity of the solute and solvent. Thus option E is correct.
what are boiling point and melting point ?The major difference is that the melting point is the temperature at which solid and liquid phases are at equilibrium state, whereas the boiling point is the temperature at which the vapor pressure of a liquid is equal to the external pressure.
Melting point in which the solid will start melting to become a liquid at a given temperature, the molecules gain enough amount of kinetic energy to overcome the intermolecular forces to convert into another form.
Another term called the freezing point is the temperature at which conversion of a liquid into solid occur.
Boiling point at which , the liquid substance enters into the gaseous phase, when the external pressure is high then a higher temperature for the vapor pressure is needed to become equal to the external pressure.
Thus option E is correct.
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how does temperature affect density in water? explain
I said chemistry but i'm taking earth scence
Explanation: Temperature Affects Density
When the same amount of water is heated or cooled, its density changes. When the water is heated, it expands, increasing in volume. ... The warmer the water, the more space it takes up, and the lower its density.
Answer:
momomomom
Explanation:
its wronh hjjvbkjgddujbxsdsssrrfghjnnkhftygdfff
How did the scientific method change the way scientists worked beginning in
the 16th century?
A. It required them to challenge the Catholic Church by denying the
existence of God.
B. It stopped them from stealing credit for others' work by banning
repeatable studies.
C. It allowed them to escape the grip of political leaders by creating
new universities.
O D. It encouraged them to rely on observation and experimentation to
support their conclusions.
Answer: D
Explanation:
apex
Starch is a type of: Protein Fat Nucleic acid Sugar
Answer:
it's not a protien at all
Explanation:
Starch is not a protein. Starch is a type of carbohydrate. It is a polysaccharide, it has lots of sugars though
Hey, can someone help me? I haven't been getting answers to my q's lately, and somehow my questions keep getting deleted. This is simple and worth 13 points. If water has a density of 19.3g/ml. Will gold float or sink in water?
Answer:
I haven't been getting answers either, so you're not alone. I am pretty sure it doesn't sink or float.
Explanation:
Gold has the same density as water, so it is neutrally buoyant. Hope this helps a bit!
covalent bonds usually form between atoms of _______?
Answer:
Non-metals
Explanation:
Covalent bonds usually occur between nonmetals. For example, in water (H2O) each hydrogen (H) and oxygen (O) share a pair of electrons to make a molecule of two hydrogen atoms single bonded to a single oxygen atom.
Calculate how many atoms are in 98.6 g Carbon (C)?
How many significant figures are in the number 20300?
Answer:
There are three significant figures in the number 20300
