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
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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
Deuterium is an isotope of hydrogen (H) that has:
A. 1 proton and 1 neutron
B. 1 proton and 2 neutrons
C. 1 proton and O neutrons
D. 2 protons and 1 neutron
Answer: B. 1 proton and 1 neutron(s)
Explanation: Founders Educere answer.
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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
helppppppppppppppppp
the third one
seeeeeee
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!
A spring toy is moving down steps, What happens to the energy of the toy?
The color of ink is a ___
Answer:
The ink colors is Magneta, yellow, and black
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
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
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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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
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:
Please Help Me! Check if my answer is correct and if not can you please explain the correct answer
If something gain electrons,its charge increases true or false
i think the answer is true.
Answer:
true
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).
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?
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:
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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:
Which term is NOT submicroscopic?
A. atom
B. ion
C. pen
D. molecule
3 difference between Homogeneous mixture and Heterogeneous Mixture
Answer:
Difference between Homogeneous mixture and Heterogeneous Mixture are as follows:
A mixture or sample that is consist of uniform composition and properties is called a homogeneous mixture while a mixture or sample that is consist of different composition and properties is called a heterogeneous mixture.Homogenous mixture has only single phase while heterogeneous mixture has two or more phases.Homogenous mixture can not be separated by physical methods while heterogeneous mixture can be separated out physically.Example of homogenous mixture is Water and sugar and heterogeneous mixture is oil and water.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
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
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:
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.
why can't copper sulphate be prepared by adding copper metal to dilute sulphuric acid
Answer:
Copper metal will not react with sulfuric acid . ( Copper metal is too unreactive / it is " below hydrogen in the reactivity series " ). So use copper carbonate, it reacts easily to give copper sulfate ( and carbon dioxide and water ) .
Explanation:
i hope it's help you
Copper sulphate cannot be prepared by adding copper metal to dilute sulphuric acid because copper is below hydrogen in the reactivity series of metals.
What is copper sulphate?Copper sulphate is an inorganic compound formed by the reaction of copper and sulphur.
What is sulphuric acid?Sulphuric acid is a strong acid that are made by the oxidizing solutions of sulphur dioxide.
Copper is below hydrogen in the reactivity series of metals, so it is unable to displace hydrogen from dil. sulphuric acid.
However, it reacts with conc. sulphuric acid to form copper sulphate.
Cu + conc. 2H2SO4 → CuSO4 + 2H2O + SO2
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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
what is k more reactive than li?
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: