Answer & Explanation: The Ames test examines the mutagenic effects of chemicals ; as such, it detects whether a given chemical can cause a reversion mutation in his- bacteria. While this is the purpose of the test, some of the reversion mutations are not caused by the mutagen being tested for. The appearance of his revertants in the presence of a non-mutagenic control compound therefore indicates that His+ revertants on the control plate are the result of spontaneous mutation.
Help me please if your good at science :)*me over here struggling about to cry*
During which time period does the car have the greatest acceleration?
A. Between 2 and 4 seconds
B. Between 1 and 6 seconds
C. Between 0 and 1 seconds
D. Between 1 and 2 seconds
Answer:
C. Between 0 and 1 seconds
Explanation:
Since 0 - 1 seconds the car accelerates to 20mph. The rest each second the car accelerates 5mph.
Answer:
c
Explanation:
a p e x!
The following is NOT an example of a behavior:
Buying a lottery ticket
Jumping rope
Doing a 60 second plank
Making the decision to buy a lottery ticket
True or false? A metal will always be produced at one electrode during electrolysis.
Yes, a metal will always be produced at one electrode during electrolysis.
What is electrode?
An electrode is an electrical conductor used to make contact with a nonmetallic part of a circuit.
An electrode can be anode or cathode. During electrolysis, that is , the decomposition of a chemical compound by electricity, a metal will be deposited at the cathode.
Thus, a metal will always be produced at one electrode during electrolysis.
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Answer: FALSE
Explanation: Often, gases rather than metals form at electrodes, especially if it involves the electrolysis of a solution.
about the lung with balloons what respiratory organ do the small balloons represents? the big balloons?
Answer:
The plastic bottle represents the chest cavity, the straws act as the bronchi, the small balloons inside the plastic bottle serves as the lungs and the big balloon at the bottom of the plastic bottle is the diaphragm.
Explanation:
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Answer:
Option C: Combustion and synthesis only
Explanation:
This reaction is referred to as combustion reaction because carbon is burnt in oxygen to produce carbon (IV) oxide.
Also, it's a synthesis reaction because the two different atoms which are Carbon and oxygen interact to form a different compound which is CO2.
Thus, the correct answer is Option C: combustion and synthesis only
predict the missing component in the nuclear equation
Answer:
¹⁴₇N
Explanation:
⁴₆C → ¹⁴₇N + ⁰₋₁e
The beta radiations are emitted in this reaction. The one electron is ejected and neutron is converted into proton.
Beta radiations:
Beta radiations are result from the beta decay in which electron is ejected. The neutron inside of the nucleus converted into the proton an thus emit the electron which is called β particle.
The mass of beta particle is smaller than the alpha particles.
They can travel in air in few meter distance.
These radiations can penetrate into the human skin.
The sheet of aluminum is used to block the beta radiation
what do thermal insulators do?
Answer:
Thermal insulation. Thermal insulation is the reduction of heat transfer (i.e. the transfer of thermal energy between objects of differing temperature) between objects in thermal contact or in range of radiative influence.
Explanation:
Answer:
The job of a thermal insulator is to reduce the heat transfer
Explanation:
What is the mass of 6.78x1050 molecules of NaCl
Answer:
Explanation:
As
Molar mass of NaCl= 58.44 gm
So we got it that,
58.44 mass of NaCl contain = 6.023*10^23 molecules of Na Cl
x mass will contain = 6.78*10^50
by cross multiplication , we get
x= 58.44*(6.78*10^50)/ 6.023*10^23
x= 65.785 * 10^27 molecules
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What two methods return water to the ocean?
(select two)
rivers
transpiration
infiltration
perspiration
Answer:
Water in different phases moves through the atmosphere (transportation). Liquid water flows across land (runoff), into the ground (infiltration and percolation), and through the ground (groundwater). Groundwater moves into plants (plant uptake) and evaporates from plants into the atmosphere (transpiration).
DUE IN 10 MINS PLEASE HELP ME ASAP!!!!!!!!!!!!!!! !•Directions: Select each correct answer. More than one answer may be correct.
DWhich of the following objects exerts a gravitational force?
A.the Sun
B.an apple
C.the Moon
D.a basketball
E.the Earth
Reset
Submit
Answer:
all of them
Explanation:
every object in the universe that has mass exerts a gravitational pull, or force, on every other mass.
Answer:
All of them
Explanation:
Study Island
Julie is searching for cookware which is safe for all food preparation techniques, which of the following would best fit her needs?
A. Silicone
B. Glass and ceramic
C. Metal
D. Plastic
A ___ star has a greater temperature than a ___ star.
A) blue, red
B) red, blue
C) red, yellow
D) yellow, blue
Answer:
red ,blue
Explanation:
because it has a greater temperature
wait i think I messed up nvm
What kind of ions are formed by Calcium (Ca), Sodium (Na), and Chlorine (CI)?
Answer:
The ions are held together by ionic bonds, which form an ionic compound. Ionic compounds generally form between elements that are metals and elements that are nonmetals. For example, the metal calcium (Ca) and the nonmetal chlorine (Cl) form the ionic compound calcium chloride (CaCl2)
Explanation:
HELP QUICKK PLEASEEE
According to the Kinetic Molecular Theory, why does an increase of temperature cause an increase of pressure in a closed container?
The particles move faster and hit the walls of the container more often.
The particles move faster and hit the walls of the container more often.
The particles become larger and hit the walls of the container more often.
The particles become larger and hit the walls of the container more often.
The particles react more and hit the walls of the container more often.
The particles react more and hit the walls of the container more often.
The particles break apart and hit the walls of the container more often.
Answer:
According to Kinetic Molecular Theory, an increase in temperature will increase the average kinetic energy of the molecules. As the particles move faster, they will likely hit the edge of the container more often. If the reaction is kept at constant pressure, they must stay farther apart, and an increase in volume will compensate for the increase in particle collision with the surface of the container.
Explanation:
This planet has water in liquid, gas, and solid forms.
O Mercury
O Venus
O Earth
O Mars
Answer:
earth
Explanation:
water vapor, water, ice
If something gain electrons,its charge increases true or false
i think the answer is true.
Answer:
true
Explanation:
2. Calculate the number of moles in 65.5 grams of the following:
a) Copper (II) Sulfate
b) Magnesium Nitrate
c) Potassium Carbonate
Answer:
a) Number of moles = 0.41 mol
b) Number of moles = 0.44 mol
c) Number of moles = 0.47 mol
Explanation:
a)
Given data:
Mass of copper sulfate = 65.5 g
Number of moles = ?
Solution:
Number of moles = mass/molar mass
Molar mass of copper sulfate = 159.6 g/mol
Number of moles = 65.5 g/ 159.6 g/mol
Number of moles = 0.41 mol
b)
Given data:
Mass of magnesium nitrate = 65.5 g
Number of moles = ?
Solution:
Number of moles = mass/molar mass
Molar mass of magnesium nitrate = 148.3 g/mol
Number of moles = 65.5 g/148.3g/mol
Number of moles = 0.44 mol
c)
Given data:
Mass of potassium carbonate = 65.5 g
Number of moles = ?
Solution:
Number of moles = mass/molar mass
Molar mass of potassium carbonate = 138.2 g/mol
Number of moles = 65.5 g/138.2g/mol
Number of moles = 0.47 mol
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the third one
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How many molecules are in 54.0 grams of CO2?
Answer:
7.38654 in 54 grams
Explanation:
To get moles, you divide grams of a substance by molecular weight. The molecular weight of CO2 is 44 g/mol. 54g divided by 44/mol is 1.227moles.
You then need to multiply moles by Avogadro’s constant (6.022x10^23). That gives you 7.38654x10^23 molecules in 54 grams of CO2.
The number of molecules in 54 grams of CO2 is 7.39 × 10²³ molecules.
• To find the number of molecules, first there is a need to find the number of moles in a substance.
• Moles are determined by using the formula, mass of substances/molecular weight of the substance.
• The molecular weight of CO2 is 44 gram per mole.
• So, the number of moles will be,
Number of moles = 54 g/44 g/mol = 1.227 moles
Now to determine the molecules, there is a need to multiply the moles with the Avogadro's constant, that is, 6.022 × 10²³. This comes out to be as,
= 1.227 moles × 6.022 × 10²³
= 7.39 × 10²³ molecules
Thus, the number of molecules in 54 grams of CO2 is 7.39 × 10²³ molecules.
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Mary, the mouse, was hiding in the rocks when she saw a sandwich hit the ground at
the park. Being she was hungry, she decided to run to the sandwich, which was 30 feet
away. It took her 5 seconds to get to the sandwich. What was her average speed?
Please Help Me! Check if my answer is correct and if not can you please explain the correct answer
In your own words, describe the rock cycle including its processes and the formation of different rock types
Answer:
That’s a question on school- what- I-
Explanation:
Which synthetic and natural polymers can be used to make thread or rope?
vulcanized rubber and starch
starch and cellulose
nylon and cellulose
vulcanized rubber and nylon
Answer:
D: vulcanized rubber and nylon
Explanation:
on edge! hope this helps!!~ d=(´▽｀)=b
Hannah is investigating how all of Earths systems can affect each other at any given moment. What is one way the cryosphere can affect the atmosphere?
Answer:
itch come get meeeeee
Explanation:
itch come get meeeeee
The color of ink is a ___
Answer:
The ink colors is Magneta, yellow, and black
The table shows index fossils.
A 4 row table. Row 1, CENOZOIC ERA. It is split into Quaternary Period, Pecten gibbus, and Tertiary Period, Calyptraphorus velatus. Row 2, MESOZOIC ERA. It is divided into Cretaceous Period, Scaphites hippocrepis, Jurassic Period, Perisphinctes tiziani, and Triassic Period, Trophites subbullatus. Row 3, PALEOZOIC ERA. It is divided into Permian Period, Leptodus americanus, Pennsylvanian Period, Dictyoclostus americanus, Mississippian Period, Cactocrinus multibrachiatus, Devonian Period, Mucrospirifer mucronatus, Silurian Period, Cystiphyllum niagarense, Ordovician Period, Bathyurus extans, and Cambrian Period, Paradoxides pinus. Row 4, PRECAMBRIAN, has no additional information.
Which conclusion about Paradoxides pinus is supported by the information in the table?
Life forms existed during the Cambrian period.
Similar fossil species formed after the Devonian period.
This fossil species first appeared during the Cenozoic era.
Different life forms were surviving during Precambrian time.
Answer:
A. life forms existed during the Cambrian period
Explanation:
Answer:
A
Explanation:
Have a nice day!
Which term is NOT submicroscopic?
A. atom
B. ion
C. pen
D. molecule
animal that hunts and kills other animals for food. It is a consumer ( carnivore or omnivore )?
Answer:
Carnivore
Explanation:
Answer:
Carnivore
Explanation:
You said just animals, not animals and plants
a certain mass of gas occupies 2240 volume at a pressure of 760mkhg and temperature of 320k.find it's new volume if the preddure is reduced to 700mmhg and temperature increased to 323k
The new volume : V₂ = 2454.8 L
Further explanationGiven
V₁=2240 L
P₁=760 mmHg
T₁=320 K
P₂=700 mmHg
T₂=323 K
Required
Volume V₂
Solution
Combined gas law :
P₁V₁/T₁=P₂V₂/T₂
Input the value :
760 mmHg x 2240 L /320 K = 700 mmHg x V₂/323 K
V₂=(P₁V₁T₂)/P₂T₁
V₂=(760 x 2240 x 323)/(700 x 320)
V₂ = 2454.8 L
why does the newton's cradle stop swinging