Answer:
1. In the morning the molecules were moving away from each other with a smaller speed than when the truck was carrying the substance.
2. The reason is that the molecules contain less average kinetic energy, thus their average speed is lower.
Explanation:
Our model of the state (phases) of the substances describes the molecules of solids as not moving away from each other, they are relatively fixed with respect to each other, just vibrating; the molecules of liquids as free to slide pass each other, which permits they to flow, but not moving away from each other; and the the molecules of the gases as moving away from each other, which is the cause of them occupying the whole space of the container that holds them.
According to that, the substance that the truck was carryng was a gas, because the molecules were moving away from each other.
After parking overnight, where energy transferred out of the substance, in the morning, the substance was a gas. Hence, the molecules were moving away from each other too. This answer the first question.
Since energy was transferred out of the substance, in the morning the temperature of the substance decreased (but no enough to make it a liquid). The average kinetic energy of the gases depends only on the temperature. So, the average kinetic energy of the molecules in the morning was smaller than when the truck was carrying the substance. Since the kinetic energy is proportional to the square of the speed of the molecules, the smaller average kinetic energy means that the average speed of the molecules was smaller too. Hence, in the morning the molecules were moving away from each other with a lower speed than when the truck was carrying the substance.
Average kinetic energy is the average sum of all kinetic energy of all the molecules of gases. Therefore, molecules will move at a lesser speed as average kinetic energy will become small.
What is kinetic energy?It is a energy which is possess by a moving object. It is very difficult to find the correct value of kinetic energy so we find average kinetic energy. Which is very easy to calculate as compared to calculating kinetic energy. It is not dependent on the type of gases or mass of gases.
Mathematically, the formula for kinetic energy can be given as
K.E=1/2mv²
Where,
m= mass of object
v= velocity of object
Molecules will move at a lesser speed as average kinetic energy will become small.
Therefore, molecules will move at a lesser speed as average kinetic energy will become small.
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3. The hydroxide-ion, [OH-], concentration in a detergent solution is 1.0 x 10-3 M. What is [H+] concentration in the detergent solution?
A) 1.0 x 10^-11 M.
B) 1.0 x 10^-9 M.
C) 1.0 M
D) 0.001 M
Answer:
c
Explanation:
h
pls help will give brainliest
the outermost "layer..............
Answer:
Thin
Explanation:
Dry, hard rock from deep within the earth reacts with water and oxygen on the surface and creates new kinds of minerals
what is elastic energy
Answer:Elastic energy is energy stored in an object for temporary strain. It is basically potential energy.
pls help !! - Using the graph below, what is the rule for a translation form point A to point D?
Answer:
Graph? Question is incomplete.
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
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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Hydrogen is an element.
True
False
Answer:
True
Explanation:
Hydrogen is one of the most abundant elements in the universe so yes
Answer:
true
Explanation:
Hydrogen is an chemical element
A chef uses a large aluminum spoon with a mass of 38.0 g to stir a pot of boiling water. As a result, the spoon’s temperature increases by 3.60°C. Consider that the specific heat capacity of aluminum is 0.90 J/g–°C. How much heat has the spoon absorbed? For credit, you must show all steps of your calculations.
Answer:
12,312 J or 0.12312 kJ
Explanation:
q = mCT
q = J of heat
m = mass
C = heat capacity
T = temp change
q = 38 x 0.90 x 3.6
q = 12312 J
q = 0.12312 kJ
How did the us stop the spread of communism during the Cold War
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.
Which term goes hand in hand with biodiversity?
(A.) sustainability
(B.) competition
(C.) survival
(D.) homeostasis
+
What category would the following amino acids be placed in and are they in the Lord
configuration? (2 marks)
COO-
A)
COO-
B)
H2N-C-H
H-C-NH3
CH2
CH2
OH
PLEASE HELP!!! Explain how the periodic table tells you about the atomic structure of an element. (this is for my physical science class)
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:
PLEASE HELP WHAT IS THE RIGHT ANSWER
Answer:
C
Explanation:
Weak acids dissociate only slightly in an aqueous solution. The majority of molecules remain undissociated.
Fill in the blanks with the correct word from the word choices:
The ___________ orbits the ____________ which orbits the_______________. Word choices: Sun, Earth, Moon.
Answer:
The Moon orbits the Earth which orbits the Sun.
Explanation:
A gas bubble occupies 14.0 mL, what is this volume into L?
Water vapor is not usually seen.
Answer:
True
Explanation:
Water vapor is totally invisible.
Without it, there would be no clouds or rain or snow, since all of these require water vapor in order to form. All of the water vapor that evaporates from the surface of the Earth eventually returns as precipitation - rain or snow.
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which scale is most precise?
which scale is most accurate?
At a fixed pressure, if the temperature is doubled, the volume of a gas will be
Answer:
Doubled.
Explanation:
The relationship between the temperature and the volume of a gas at a constant pressure can be described using Charles' law:
V₁*T₂ = V₂*T₁That means that the temperature and the volume of a gas are directly proportional: The higher the temperature, the higher the pressure. If one of those factors is increased twofold, the other one will be increased twofold as well.
How can you figure out the properties of a star?
Answer:
Measuring distances to stars through stellar parallax. Measuring distances to stars through the moving cluster method. Astronomers measure the temperature of a star by looking at the star's color and its spectrum. The apparent brightness of a star tells how bright it seems to us
Explanation:
Answer:
Analyze the Characteristics of a Star
Explanation:
Surface Temperature
First, you want to determine the color of the star - this can determine the heat and age of the star.
Second, you want to measure the spectrum and get the spectral type.
Chemical Composition
Determine which lines are present in the spectrum.
Luminosity
Measure the apparent brightness and compensate for distance
Radical Velocity
Measure the Doppler shift in the spectrum.
Rotation
Measure the width of spectral lines.
Mass
Measure the period and radial velocity curves of spectroscopic binary stars.
Diameter
1. Measure the way a star’s light is blocked by the Moon.
2. Measure the light curves and Doppler shifts for eclipsing binary stars.
Use the drop-down menus to complete each
phrase describing voltaic cells.
Redox reactions involve a transfer of
Voltaic cells are also known as
cells.
Voltaic cells are composed of two separate
cells.
The physical material where the redox reactions
occur is called the
Answer:
electrons
galvanic
half-
electrode
Explanation:
I got it right :)
The words that complete each of the blanks in the question are;
electronsgalvanichalf-electrodeWhat is a voltaic cell?A voltaic cell is one that produces energy by a sponteanous chemical reaction. A voltaic cell is a type of electrochemical cell.
The following are the words that complete the individual blanks';
electronsgalvanichalf-electrodeLearn more about voltaic cell: https://brainly.com/question/14356798
Displacement
A. Must be in a particular direction
B. Is the change in position of an object
C. Must be in a straight line
D. All of the above
Answer:
Option D
Explanation:
Displacement is a vector quantity.
Genetic material (_____) is passed from cell to cell.
Answer:
DNA
Explanation:
Genetic material DNA is passed from cell to cell.
What is DNA?DNA is Deoxyribonucleic acid. It is a polymer composed of two polynucleotide chains. These chains coil around each other to form a double helix. The polymer carries genetic instructions for the development, functioning, growth and reproduction of all known organisms and many viruses. It keeps on transferring from generation to generation. Two types of Nucleic acids are DNA and ribonucleic acid.
In DNA, 4 bases are present that are Adenine, Guanine, Cytosine and Thymine. Whereas Thymine is replaced by Uracil in case of RNA.
These bases are connected by hydrogen bonds with each other.
The configuration of the DNA molecule is highly stable, allowing it to act as a template for the replication of new DNA molecules, as well as for the production (transcription) of the related RNA (ribonucleic acid) molecule.
Therefore, Genetic material DNA is passed from cell to cell.
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Is hydrogen a metal or a nonmetal? How many valence electrons does a hydrogen atom have?
Answer:
hydrogen is a non-metal and it has 1 valence electron
Explanation:
You can find the valence electrons on the bottom left of your periodic table, it is under the atomic number. Hydrogen is a non-metal because hydrogen conducts heat and electricity poorly.
Which of the following is the best example of a symbiotic relationship?
Certain breeds of fish will often clean bigger fish. The cleaner fish gets food, the bigger fish gets a cleaning.
or
A foolish man decides to go swimming in shark-infested waters. As a result, he is bitten by a shark looking for food.
or
A pair of birds fight over a piece of food. The dominant bird wins.
or
The climate changes. As a result, hundreds of species become extinct and the land turns into a desert.
?
Answer:
Certain breeds of fish will often clean bigger fish. The cleaner fish gets food, the bigger fish gets a cleaning.
I'm not too sure.
Good luck! <3
This diagrams represents...
a
a pure substance containing diatomic molecules
b
a pure substance containing compounds
c
a mixture containing compounds
d
a mixture of atoms
zinc, sulphur, oxygen
What would this compound be called?
Zinc sulphate
Zinc sulphateZnSO₄
This is the answer.
How will popcorn protect a egg by reducing the force of impact on the egg? How does it work?
Answer:
The popcorn will take less impact because the force goes into the popcorn serving as a cushion for the egg. The egg will take less damage because the force will cancel out.
Explanation:
A 4.00g sample of helium has a volume of 24.4L at a temperature of 25.0 C and a pressure of 1.00 atm. The volume of the helium is reduced to 10.4L, but the temperature and pressure of the gas are kept constant. What is the new quantity of the gas in moles
Answer:
0.852 mol
Explanation:
First we convert 4.00 g of helium (He) into moles, using its molar mass:
4.00 g ÷ 2 g/mol = 2 mol He
To answer this problem we can use Avogadro's law, which states that at constant pressure and temperature:
V₁n₂=V₂n₁
Where:
V₁ = 24. 4 Ln₂ = ?V₂ = 10.4 Ln₁ = 2 molWe input the data:
24.4 L * n₂ = 10.4 L * 2 molAnd solve for n₂:
n₂ = 0.852 molpls help me answer this!
Answer:
neutrons is metal.......
Europe and United States use geothermal power extensively.
True
False
Answer:
True
Explanation:
US. With an installed capacity of 3,639MW in 2018, the US is the leading producer of geothermal energy across the world, producing 16.7 billion kilowatt hours (kWh) of geothermal energy throughout the year. More recently, extensive direct heat utilization projects have been undertaken in many European countries, and electric power developed extensively in Italy and Iceland. Geothermal heat pumps became extensively used in Austria, Switzerland, Germany and Sweden (Antice, Miklos and Sanner, Burkhard, 2007).
give a reason why it is not advisable to heat magnesium before heating ammonium nitrate
Answer:
it can result in an increasing risk of the accumulation of decomposition products, self-heating (from the heat released by the slow decomposition reactions)
Magnesium can result in an increased risk of the accumulation of decomposition products, self-heating (from the heat released by the slow decomposition reactions)
What is ammonium nitrate?Ammonium nitrate is used commonly in fertilizers; in pyrotechniques, herbicides, and insecticides; and in the manufacture of nitrous oxide.
When ammonium nitrate is heated, it decomposes exothermically into nitrous oxide and water.
Hence, Magnesium can result in an increased risk of the accumulation of decomposition products, self-heating (from the heat released by the slow decomposition reactions)
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