Answer:
In chemistry, an element is a pure substance which cannot be broken down by chemical means, consisting of atoms which have identical numbers of protons in their atomic nuclei. The number of protons in the nucleus is the defining property of an element,
Two positively charged particles are first brought close together and then released. Once released, the repulsion between particles causes them to move away from each other. (a) This is an example of potential energy being converted into what form of energy? (b) Does the potential energy of the two particles prior to release increase or decrease as the distance between them is increased.
Answer:
(a) Kinetic energy.
(b) The potential energy between the two particles will decrease as they move away from each other.
Explanation:
(a)The question seems to imply that the two particles were not moving before they were released. In that case, both particles will have a kinetic energy of zero.
However, once the two particles are released and start to move away from each other, their speed increases. That corresponds to an increase in their kinetic energies. As these particles move away from each other, their kinetic energy continues to increase. Note that electrical repulsion is the force that accelerated the two particles. Therefore, conclude that the (electrical) potential energy of the two particles is converted to kinetic energy.
(b)Let [tex]q_1[/tex] and [tex]q_2[/tex] denote the charge on the two particles. Let [tex]r[/tex] denote the distance between them. Assume that the sizes of these two particles are much smaller than the distance between them. Let [tex]k[/tex] represent the Coulomb Constant. The size of the electrical potential energy between the two particles would be:
[tex]\displaystyle E = \frac{k\, q_1\, q_2}{r}[/tex],
Based on these assumptions, the size of the electrical potential energy between the two particles is inversely proportional to the distance between them. Increasing the distance between the two particles would reduce the size of the electrical potential energy.
Rutherford's Simulation showed that the positive protons are scattered all over the atom. True False
Answer:
False
Explanation:
I have no explanation. I am guessing
if a solid becomes a liquid you must add energy. what is this process called?
Answer:
latent heat, also called the heat of vaporization, is the amount of energy necessary to change a liquid to a vapour at constant temperature and pressure. The energy required to melt a solid to a liquid is called the heat of fusion, and the heat of sublimation is the energy....................
How do you express weight?
2.3.12mL =
L*
O
a. .312
O b.31.2
O
C..00312
O d..0312
Answer:
0.00312 L
Explanation:
1 liter = 1,000 ml
3.12 ml*(1 liter/1,000ml) = 0.00312 L
C
1. What is the mass of 5.05 mL of air if the density of air is 1200.0 g/mL?
Answer:
mass=?,volume=5.05,density=1200.
density=mass/volume.
1200=mass/5.05.
mass=1200×5.05=6060g
Answer:
[tex]\huge \boxed{\mathrm{6060 \ grams}}[/tex]
Explanation:
[tex]\sf \displaystyle density = \frac{mass}{volume}[/tex]
[tex]\sf \displaystyle 1200 = \frac{m}{5.05}[/tex]
Multiplying both sides by 5.05.
[tex]\sf \displaystyle 1200(5.05) = \frac{m}{5.05}(5.05)[/tex]
[tex]\sf 6060=m[/tex]
The mass of the air is 6060 grams.
PLEASE HELP!!!! I NEED TO TURN IT IN TODAY!!
what volume is represented by each small tick mark?
Answer:
hey mines due today did u ever get the answerrr!!
Explanation:
Answer: 25 ML
Explanation:
I had that question and got it right so..
Choose the correct answer to complete the paragraph about the acceptance of the heliocentric model. In the second century BCE, the Greek astronomer Ptolemy tried to explain the backward movement of the planets by using a solar system model that included . For centuries, this was the accepted model. During the Renaissance, Nicholas discovered the old heliocentric model of Aristarchus. In Aristarchus’s model, the rising and setting of the Sun was explained by the movement of the .
Answer:
the first blank is epicycle.
the second blank is Copernicus
the third blank is earth
In the second century BCE, the Greek astronomer Ptolemy tried to explain the backward movement of the planets by using a solar system model that included epicycles. For centuries, this was the accepted model. During the Renaissance, Nicholas Copernicus discovered the old heliocentric model of Aristarchus. In Aristarchus’s model, the rising and setting of the Sun was explained by the movement of the Earth.
What is Heliocentric Model?The heliocentric theory of the Solar System (aka, the heliocentric model) is a theory that places the Sun at the center of the Solar System. It also maintains that the Earth revolves around the Sun.
This theory was first proposed by Nicolaus Copernicus.
Copernicus was the first to propose a theory which differed from Ptolemy's Geocentric System, according to which the earth is at rest in the center with the rest of the planets revolving around it. The claim that all planets revolve around the sun had been raised in ancient times, but Copernicus was the first to succeed in describing the movements of the planets using an astronomical theory which placed the sun at the center.
Therefore, In the second century BCE, the Greek astronomer Ptolemy tried to explain the backward movement of the planets by using a solar system model that included epicycles. For centuries, this was the accepted model. During the Renaissance, Nicholas Copernicus discovered the old heliocentric model of Aristarchus. In Aristarchus’s model, the rising and setting of the Sun was explained by the movement of the Earth.
Learn more about Heliocentric Model, here:
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PLEASE HELP PLEASE ASAP
air pollution would cause trees to die and animals to die . It would coaus most harm by killing everything on land and in the sea beacuse the animals that die might wash away in the ocean killing other animals slowly but surely. and it doesnt help there is soil erosion sooner rather that later it will turn into nothing.
Explanation:
Convert 0.057 m to km
Answer:
5.7e-5
Explanation:
[tex]\frac{0.057}{1000} \\= 5.7\times 10^-5 km[/tex]
0.057 meters is equivalent to 0.000057 kilometers.
The metric system is a decimal-based system of measurement where prefixes are used to indicate different magnitudes of the base unit. In the case of length or distance, the base unit is the meter (m), and the prefix "kilo-" represents a factor of 1000.
To convert a smaller unit, such as meters, to a larger unit, such as kilometers, we divide by the appropriate conversion factor, divide by 1000 since there are 1000 meters in 1 kilometer.
To convert meters (m) to kilometers (km), divide the value in meters by 1000 since there are 1000 meters in 1 kilometer.
Given that we want to convert 0.057 m to km, calculate it as follows:
0.057 m ÷ 1000 = 0.000057 km
To learn more about the kilometer, follow the link:
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When a scientist analyzes experimental results, the scientist is
What are three concepts that you may explore while learning in a physical science course?
please help with the last 2.
Answer: Yttruim: 39 protons, 50 neutrons, 39 electrons
Ruthenium: 44 protons, 57 neutrons, 44 electrons
the atomic number of an atom is the number of ____ in that atom.
Answer:
Protons
Explanation:
Bromine has 35 protons and is number 35 for example
Which of the following correctly describes a compound? (4 points)
The atoms are chemically bonded together, and they retain their individual physical and chemical properties.
The atoms are not chemically bonded, and there is no set ratio for how the atoms can combine together.
The atoms can only combine in fixed ratios, and they can only be separated by a chemical change.
The atoms do not retain their individual chemical properties, and they can be separated by physical means.
Explanation:
The atoms are chemically bonded together, and they retain their individual physical and chemical properties.
Answer:
The atoms can only combine in fixed ratios, and they can only be separated by a chemical change.
Explanation:
just took the test the other guys thing was wrong
you add 5.6g of iron to 23.60ml if water and observe that the volume of iron and water together is 24.31 ml. calculate the density
Answer:
8g/mL
Explanation:
Density = Mass/Volume
There is 5.6g of Iron added to the water of 23.60mL and it rose by 0.7mL.
Density = 5.6g/0.7mL of Iron.
6. Using the rules of significant figures, calculate the following:
6.167 +52
5.10
A) 11.4
B) 12
C) 11
D) 63
E) 11.41
Answer:
A. 3
B . 2
C. 2
D. 2
E. 4 significant figures
Gerry is looking at salt under a powerful microscope and notices a crystalline structure. What can be known about
the salt sample that Gerry is looking at?
Answer:
The atoms are vibrating in place.
Explanation:
One of the properties of an ionic substance is the possession of a crystalline structure. As Gerry observed the salt under a microscope, he discovered that it has a crystalline structure. Crystalline salts are all ionic in nature, hence the salt observed by Gerry is an ionic salt.
Solids containing a definite crystalline structure always has their particles vibrating in place. This is immediately evident as Gerry looks at the salt through a microscope.
Answer:
D.The atoms are vibrating in place
Explanation:
Which model best illustrates Thomson’s explanation of the atom? Answers in the picture.
pluses and negatives
D) because it has negative and positive signs
Answer:
D. This D one model best illustrates Thomson explanation of atom
Explanation:
3. Which of the following best describes the difference in the results of mitosis and
meiosis?
a. Mitosis results in daughter cells with a
complete set of genes. Meiosis
results in daughter cells with half the
genes.
b. Mitosis results in four daughter cells.
Meiosis results in only two daughter
cells.
c. Mitosis produces results in only a few
seconds. Meiosis produces results in
several hours.
d. Mitosis results in daughter cells with a
cell membrane. Meiosis results in
daughter cells with a cell wall.
4
Seycells have
Answer:
A
Explanation:
Mitosis makes 2 daughter cells so you know the answer is not b
B
(2)
energy
(3)
A
reaction pathway
2C(s) + H2(g) + 227.4 kJ → C2H2(g)
In the energy diagram, which number represents the potential energy of the products?
Answer:
mgh is the formula for potential energy
A bottle of coke is 250.0 mL. What is the volume in cubic centimeters?
Answer:
The volume in cubic centimeters is 250
Explanation:
The rule of three or is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them.
If the relationship between the magnitudes is direct, that is, when one magnitude increases, so does the other (or when one magnitude decreases, so does the other), the direct rule of three must be applied. To solve a direct rule of three, the following formula must be followed:
a ⇒ b
c ⇒ x
So:
[tex]x=\frac{c*b}{a}[/tex]
The direct rule of three is the rule applied in this case where there is a change of units. To perform this conversion of units, you must first know that 1 mL = 1 cubic centimeters. So, if 1 cubic centimeters is 1 mL, how many cubic centimeters equals 250 mL?
[tex]cubic centimeters=\frac{250 mL*1 cubic centimeters }{1 mL}[/tex]
cubic centimeters= 250
The volume in cubic centimeters is 250
10) A student’s calculation w as found to have a 15.6% error, and the actual value w as determined to be 25.7 mL. W hat are the tw o possible values for the student’s experimental measurement?
Answer:
The actual value = 25.7 ml
The error = 15.6%
This means that the value of error = 0.156 * 25.7 = 4.0092 ml
Now, the error percentage found means that the student got the value either greater than the actual one with the value of error or less than the actual one with the value of error.
This means that the two possible readings are:
either : 25.7 + 4.0092 = 29.7092 ml
or : 25.7 - 4.0092 = 21.6908 ml
Explanation:
Which statement provides a reason why a scientific theory could change? * 1 point O scientists repeat the experiments associated with the theory O scientists find new evidence that does not fit the theory O the theory is published in a scientific journal O the theory is over 100 years old
Answer:
B. Experiments test the scientists' ideas.
Explanation:
Experiments helps scientist test the ideas.
Experiment is simply an act of performing a controlled test about an idea.
Before an experiment is made, observations using senses must be deduced from the environment at first.
Observations leads to the formulation of hypothesis.
Hypothesis are more or less a scientific predictions.
Most hypothesis presents variables that can be tested.
The test of a hypothesis is an experiment.
Experiments help us makes controlled test about a scientific observation in a laboratory.
The second option!
I hope this helps!
Describe the position of each part of an atom in the bohe model
Explanation:
Hey, there!!
The parts are an atom are:
Electrons Protons NeutronsGenerally, Protons and Neutrons lies in the centre of an atom. After that the shells made outer are covered by electrons. We keep 2 electrons in 1st shell, 8 electrons in 2nd, 18 electrons in 3rd shell and so on. The positions of neutron and protons are always in the nucleus and electrons are in the orbits or shell.
Hope it helps....
A rectangle has a length of 5.50m and a width of 12.0m. What is the area of this rectangle?
Answer:
66m
Explanation:
To get the area of something you multiple the length (5.5) by the width (12) together. So the problem would look like 5.5×12 and if you multipe that you get 66
what is the chemical formula of ammonium sulphate
Answer:
(NH∨4)∨2SO∨4
Explanation: The ∨ just means that the number is written small and not big
if the density of iron is 8.76g/ml how many liters will 10.0 grams occupy please I need help
Answer:
0.876 ml
8.76/10 = 0.876
The boiling point of isopropyl alcohol is 80.3°C. What state of matter is isopropyl alcohol in at 99°C?
plasma
solid
liquid
gas
Someone please help quick!
Answer:
Liquid
Explanation:
Which of the following appliances increase CFC's in the atmosphere?
(2 Points)
A.Refrigerators
B.Microwave ovens
C.Washing machines
D.Televisions
Answer:
Television cause it has a satellite