Answers
Answer:
11: 4
12: 3
13: 1
17: 3.000060
18: 5.0 x 10^2
19: 5.0 x 10^6
Explanation:
11: digits between 1&9 are always signifigant even if there are zeros between them
13: Zeros after the decimal do not count unless they represent an exact measurement
18: The decimal point moves forward 2 units so 10^2
Related Questions
What does it mean for heat to be transferred by radiation?
A. Energy is transferred through converting bond energy to kinetic
energy
B. Energy is transferred when one molecule collides with another.
C. Energy is transferred when molecules absorb electromagnetic
waves.
D. Energy is transferred through moving currents of warmer air or
liquid.
SUBMIT
Answers
Answer:
C.
Explanation:
Heat transfer by thermal radiation is transfer of heat by electromagnetic wav
The meaning for heat to be transferred by radiation is energy is transferred when molecules absorb electromagnetic waves.
What are electromagnetic waves?Electromagnetic waves are the waves of electromagnetic field. Examples are radio waves, x-rays, and gamma rays.
These waves carry through space with carrying electromagnetic radiations.
Thus, the correct option is C. Energy is transferred when molecules absorb electromagnetic waves.
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help asap show work | a gas with a volume of 13L at a pressure of 197 kPA is allowed to expand to a volume of 23L. what is the pressure of the container if the temperature remains constant
Answers
Answer:
111 kPaExplanation:
The new pressure can be found by using the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2[/tex]
where
P1 is the initial pressure
P2 is the final pressure
V1 is the initial volume
V2 is the final volume
Since we're finding the new pressure
[tex]P_2 = \frac{P_1V_1}{V_2} \\[/tex]
We have
[tex]P_2 = \frac{13 \times 197000}{23} = \frac{2561000}{23} \\ = 111347.826...[/tex]
We have the final answer as
111 kPaHope this helps you
what type of cells are these?
(Plant or animal)
Answers
Answer:
5 is an animal cell, 6 is a plant cell
Explanation:
hope this helps!
6.Plant because that looks like the cells on a crease of a leaf
Hope this helps
Don’t have to explain please just give me an answer
Answers
Answer:
the 3rd one is the answer
write word equation for the reaction between dil hydrochloric acid with zinc oxide
Answers
Answer:
Zinc Oxide + Dil. Hydrochloric Acid -----> Zinc Chloride + Water
When the pressure is in a certain gas cylinder with a volume of 4.50 L reaches 500atm, the cylinder is likely to explode. If this cylinder contains 40.0 moles of argon at 25.0°C, is it on the verge of exploding? Calculate the pressure
Answers
Answer:
The cylinder is nit on the verge of exploding.
Explanation:
Temperature= 25.0°C
The conversion of T(°C) to T(K) is shown below:
T(K) = T(°C)+ 273.15
So,
T=(25.0 + 273.15) K = 298.15 K
Volume= 4.50 L
Moles= 40.0 mol
Using ideal gas equation as:
PV = nRT
where,
P is the pressure
V is the volume
n is the number of moles
T is the temperature
R is gas constant having value = 0.0821 Latm/ K. mol x 298.15 K
⇔ P= 217.58 atm
Pressure limit = 500 atm .
Name the following base: NaOH
Answers
Answer:
Arrhenius Base
Explanation:
"NaOH is an Arrhenius base because it dissociates in water to give the hydroxide (OH-) and sodium (Na+) ions. An Arrhenius acid is therefore any substance that ionizes when it dissolves in water to give the H+, or hydrogen, ion. ... Acids provide the H+ ion; bases provide the OH- ion; and these ions combine to form water."
==================================================================
Hope I Helped, Feel free to ask any questions to clarify :)
Have a great day!
More Love, More Peace, Less Hate.
-Aadi x
Green plant cells photosynthesize and do NOT need Cellular Respiration. true or false
Answers
Stronger acids are those that -
O more completely inhibit polarity in water
O exhibit hydrogen bonding
O hold on to their protons more strongly
O lose their protons more easily
Answers
Which situation has given to a trait that could be passed on to offspring ?
Answers
Answer:
Heredity, also called inheritance or biological inheritance, is the passing on of traits from parents to their offspring; either through asexual reproduction or sexual reproduction, the offspring cells or organisms acquire the genetic information of their parents.
Explanation:
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You are explaining how heat transfers. Your friend insists that when you touch something cold, you become cold
Which statement can be used to explain to them what is really occurring?
O Heat transfers to your body from the cold object until they are all at the same final temperature,
O Heat transfers from your body to the cold object until they are all at room temperature,
O Heat transfers to your body from the cold object until they are all at room temperature
O Heat transfers from your body to the cold object until they are all at the same final temperature,
HELP ME PLZZZ
Answers
Answer:
its C
Explanation:
Please Help ASAP!! Marking Brainliest!
Answers
Answer:
If they are pushing off the wall, it would be B, as they are going faster. If they are slowing down, it would probably be A, gradually getting slower.
Explanation:
When do recessive traits show in an offspring?
Answers
Answer:
Only individuals with an aa genotype will express a recessive trait; therefore, offspring must receive one recessive allele from each parent to exhibit a recessive trait. One example of a recessive inherited trait is a smooth chin, as opposed to a dominant cleft chin.
Explanation:
How did the us stop the spread of communism during the Cold War
Answers
Answer:
With the policies of containment, the United States hoped to effectively stop the spread of communism and their newest threat. After the war, the United States and the Soviet Union had very different ideas on how to rebuild.
You observe mothballs disappearing in cabinets. What do you think is the reason for this? Do all substances behave like mothballs at normal conditions? Explain by citing some examples Need lang po for science ;(
Answers
Answer: Mothballs have weak intermolecular forces.
No all substances do not behave like mothballs at normal conditions. Example: benzene , chloroform
Explanation:
Sublimation is a process of converting a substance from solid state to gaseous state without the formation of liquid at constant temperature.
A substance which undergoes sublimation is called as sublimating substance.
As mothballs is made of napthalene which has weak inter molecular forces of attraction between its molecules, it directly sublimes into gaseous state without leaving any residue and is called as a sublimating substance.
Not all substances behave like mothballs at normal conditions. Example: benzene , chloroform
Due to weak intermolecular attraction force mothballs will disappear and not every compound show this type of behavior like benzene and chloroform.
What are mothballs?Mothballs are also known as Naphthalene balls, they are the aromatic organic compounds and they are the members of the sublimating substance family as they directly convert into gaseous state from the solid state.
In the mothballs or naphthalene balls, there is a weak attraction of force London dispersion force is present between their constitute particles, and in normal condition they show sublimation and gets disappear. Not all aromatic compounds behave like these balls as not in all compounds these types of force present, for example in benzene and chloroform strong covalent bond is present.
Hence, not all compounds behave like mothballs and they show that property due to weak attraction force.
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CH3(ch2)2C(ch3)3 IUPAC name please?
Answers
Answer:
Explanation:
The name is of the compound is 3,3,4,4-tetramethylhexane.
please help its due tonight!!! also no links allowed.
When 28,242 J are transferred to a water sample, it's temperature increases from 18⁰C to 63⁰C. Determine the mass of the water sample.
Answers
Answer:
149.79 grams.
Explanation:
Formula
Joules = m * c * delta (t)
Givens
J = 28242
m = ?
c = 4.19
Δt = 63 - 18 = 45
Solution
28242 = m * 4.19 * 45
28242 = m * 188.55
m = 28242 / 188.55
m = 149.79
What is a gluon?
A. A particle that binds quarks to one another
B. A radioactive particle
C. An electrostatic force
D. A weak nuclear force
Answers
Answer:
A
Explanation:
it binds quarks together
In quantum chromodynamics the theory of the strong force, the interactions of the quarks are described in terms of eight types of massless gluon. A gluon is a particle that binds quarks to one another. The correct option is A.
What is gluon?The gluon, so called the messenger particles is defined as the strong nuclear force which binds the subatomic particles known as quarks within the protons and neutrons of stable matter as well as within heavier short-lived particles at high energies.
It has been found that the quarks interact by emitting and absorbing gluons just as electrically charged particles interact through the emission and absorption of photons. Like quarks the gluons carry a strong charge known as colour. This means that gluons can interact between themselves through the strong force.
The gluons have no electric charge.
Thus the correct option is A.
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Determine what product will be produced at the negative
electrode for the following reaction:
2CuSO4 (aq) + 2H20 (1) -> 2Cu(s) + 2H2SO4(l) + O2(g)
A. CuSO4
B. Cu
C. H2SO4
D. H2
Answers
Cu will be produced at the negative electrode for the following reaction:
2CuSO4 (a q) + 2H20 (1) -> 2Cu(s) + 2H2SO4(l) + O2(g) ,therefore option (b) is correct.
What do you mean by the term electrolysis ?
Electrolysis is defined as a process of decomposing ionic compounds into their elements by passing a direct electric current through the compound in a molten form.
Characteristics of negative electrode -:
The negative electrode in an electrolytic cell, is the one toward which positively charged particles are attracted.
The cathode has a negative charge because it is connected to the negatively charged .
When an electrolyte is dissolved in water and an electric current is passed through it, the Cations move towards the cathode and Anions move towards anode .
Cu will be produced at the negative electrode for the following reaction:
2CuSO4 (a q) + 2H20 (1) -> 2Cu(s) + 2H2SO4(l) + O2(g) ,hence option (b) is correct.
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The H2 product will be produced at the negative electrode for the following reaction 2CuSO₄ (aq) + 2H₂0 (1) -> 2Cu(s) + 2H₂SO₄(l) + O₂(g). option D is correct.
What is electrodes?The electrode is an electrical conductor or source of electricity that carries electric current or circuit to the non-metallic circuit parts of a circuit, some examples are electrolyte and semiconductor.
The following reaction 2CuSO₄ (aq) + 2H₂0 (1) -> 2Cu(s) + 2H₂SO₄(l) + O2(g) is a redox reaction in which the negative end is producing the H2 gas and copper gets solidify at the positive end.
Therefore, H₂ product will be produced at the negative electrode for the following reaction 2CuSO₄ (aq) + 2H₂0 (1) -> 2Cu(s) + 2H₂SO₄(l) + O₂(g). option D is correct.
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Outdoor decay of objects is a chemical reaction. Some ancient objects have been preserved extremely well in Arctic conditions. As glaciers have melted, archaeologists have discovered 4,000-year-old Viking clothing. Clarissa left her wool sweater outside at her family's summer cottage in Florida. When she returned the following summer, the sweater was in shreds, decayed by reactions that break down wool. Based on the data in the table, what can you conclude about the rate at which clothing decays in cold temperatures compared with the rate at which clothing decays in warm temperatures?
A. More information is needed to compare rates of decay
B. Reactions occur at the same speed in all temperatures
C. Reactions occur more quickly in the cold
D. Reactions occur more slowly in the cold.
Answers
Answer: D. Reactions occur more slowly in the cold.
Explanation:
Which of the following is an example of a population having variations?
Some worms are nocturnal and some a diurnal
All polar bears have coats
Ostriches run fast
The rabbits that eat grass will survive
Answers
Answer:
Some worms are nocturnal and some a diurnal
Explanation:
Variation is difference between cells, individual organisms, or groups of organisms of any species caused either by genetic differences (genotypic variation) or by the effect of environmental factors on the expression of the genetic potentials (phenotypic variation).
NOTE:these are of the same species.
PLEASE HELP!!! Explain how the periodic table tells you about the atomic structure of an element. (this is for my physical science class)
Answers
Answer:
The number of outer shell electrons determines the group number of the element. The number of occupied principle quantum shells (energy levels) determines the period of the element. The proton number determines the element itself and its position.
Explanation:
In an ideal gas, entropy is a measure of the
Answers
Answer:
Entropy is a measure of the degree of spreading and sharing of thermal energy within a system. For an ideal gas that expands at a constant temperature (meaning that it absorbs heat from the surroundings to compensate for the work it does during the expansion), the increase in entropy is given by ΔS= R1n (V2/V1)
Explanation:
hope this helps!
Please please please please please please help me a b c or d
Answers
Answer:
the answer is d
Explanation:
hopes this helps
You and your Canadian pen pal enjoy talking about nature together. While your friend describes some birds that she saw today, you realize that one of the birds she described sounds like one you have seen in your home state of Indiana. You remember that all organisms have common and scientific names. Which would be most appropriate to use to confirm with your friend? (1 point) O You should use the bird's common name since it is easier to pronounce than the scientific name. You should use the scientific name because it is local to North America. O You should use the bird's scientific name since that name is the same everywhere in the world. You should use the bird's common name since it is based on the bird's characteristics. he
Answers
Answer:
you should use the scientific name because it is the same everywhere in the world
Explanation:
the scientific name of anything and everything is the same around the world.
WHAT INVESTMENT OF A $125 WOULD HAVE THE MOST LASTING VALUE FOR YOUR FUTURE?
A pair of jordans
Some nice cologne or perfume
3 college credits at MCC BAG
a dinner with 2 or 3 people
Answers
Answer:
a pair of jordans
Explanation:
WILL OFFER BRAINLIEST IF YOU CAN ANSWER THIS
Scenario 1: The pitcher throws a fastball down the middle of the plate. The batter takes
a mighty swing and totally misses the ball. The umpire yells, "Strike one!"
Scenario 2: The pitcher throws an off-speed pitch and the batter checks his swing. The
batter just barely makes contact with the ball and it dribbles down in front of the batter's
feet into foul territory. The umpire yells, "Foul ball; strike two!"
Scenario 3: The pitcher throws a curve ball that looks like it might catch the outside
corner of the plate. The batter swings with all his strength, but the bat grazes the
underside of the ball and the ball skews off to the right, flying into the crowd. The umpire
yells, "Foul ball, still two strikes!"
Scenario 4: The pitcher throws another fastball down the middle of the plate. The batter
swings and wallops the ball high into the air and the ball clears the center field wall that
reads 410 feet. The ump yells, "Homerun!"
In which scenario did a chemical reaction occur between reactant A and B?
Question 1 options:
1
2(INCORRECT)
3 (INCORRECT)
4
Answers
Answer:
I believe it is scenario 4
Explanation:
11. A chemical reaction happens when chemicals combine to form a new _______
Answers
Answer:
substances
Explanation:
A chemical reaction happens when substances break apart or combine to form one or more new substances.
^Hope it helps, Hazel^
Fill in the blanks with the correct word from the word choices:
The ___________ orbits the ____________ which orbits the_______________. Word choices: Sun, Earth, Moon.
Answers
Answer:
The Moon orbits the Earth which orbits the Sun.
Explanation:
Heat from the sun is absorbed by the _____?
Answers
Answer:
earth
Explanation: