What is the difference between a number and a measurement ?
Answer:An exact number has absolutely no uncertainty in it. Exact numbers cannot be simplified and have an infinite number of significant figures. Measured numbers have a limited number of significant figures.
Explanation:
what is a protons mass
Answer:Proton, stable subatomic particle that has a positive charge equal in magnitude to a unit of electron charge
Explanation:
A proton has a mass of about 1 amu
Unlike animal cells, plant cells have
a
Chloroplasts, Cell Wall, and 1 Large Vacuole
b
Cell Wall, Mitochondria, and Many small Vacuoles
c
Chloroplasts, Cell Wall, and Mitochondria
Answer:
b
Explanation:
Answer:
A. Chloroplasts, Cell Wall, and 1 Large Vacuole
Explanation:
Because they are plants, theres no other reason
name the fuel used in rockets
What did Dalton determine about the relationship between atoms, elements, and compounds?
Answer: got on xbox
Explanation:
Which of the following is FALSE about the atomic models and subatomic particles?
Which of the following is FALSE about the atomic models and subatomic particles?
a
J. J. Thompson discovered the electrons using the Cathode Ray Tube and proposed electrons were randomly scattered inside the atom.
b
John Dalton's model of the atom was a solid that was divisible into subatomic particles
c
In Schrodinger and Heisenberg's combined model of the atom, electrons were both particles and waves at the same time.
d
Rutherford's model was the first to include a positively charged nucleus at the center of the atom.
Answer:
all i know is that its not D ... good luck luv lol
Explanation:
look at the image djsksk
You poor human djsksk-
Answer:
The first one is qualitative.
Second one is quantitative.
Third one is qualitative.
Fourth one is quantitative.
Explanation:
Quantitative data is information about quantities; that is, information that can be measured and written down with numbers. Qualitative data is information about qualities; information that can't actually be measured.
I hope this helps! <3
~Sakura Hitoroku
Mercury metal is poured into a graduated cylinder that holds exactly 22.5 mL. The mercury used to fill the cylinder weighs 306.0 g. From this information, calculate the density of mercury
Answer:
The answer is 13.6 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass of mercury = 306 g
volume = 22.5 mL
The density is
[tex]density = \frac{306}{22.5} \\ [/tex]
We have the final answer as
13.6 g/mLHope this helps you
Answer:
13.6
Explanation:
what are 4 physical properties of Copper wire?
Answer:
Malleable, Conductive, Lustre and Ductile
Answer: 1-it is solid, 2- it is orangish red, 3- it can be bent and 4-is M.P is very high
Explanation:
A group 5A element:
actinium
arsenic
rhenium
Answer:
ARESENIC is in the 5A category
Explanation:
edge 2020
5A (Nitrogen group) elements tend to react to gain 3 electrons to be like noble gas.
What is 5A group element?5A group known as nitrogen group. In these group elements contains nonmetals, metals, halogens, noble gases and metalloids.
These elements react with oxygen to form acidic compounds.
Configuration of 5A group: 2s2 2p3, 3s2, 3p2
Example: nitrogen, phosphorus, arsenic etc.
Actinium (Ac) atomic number = 89 (it is a silvery radioactive metallic material. Actinium-227 is extremely radioactive element).
Arsenic (Ar) atomic number = 33 (it found in many minerals usually in combination of sulfur and metals but it also found in pure elemental crystal. It is a metalloid).
Rhenium (Re) atomic number = 75 (it is found in earth crust. It is used in additive to tungsten and molybdenum-based alloys. It is very toxic to humans it may causes skin related disease).
Therefore, 5A (Nitrogen group) elements tend to react to gain 3 electrons to be like a noble gas.
Learn more about 5A group element, here:
https://brainly.com/question/843304
#SPJ6
A lithium atom contains 3 protons, 4 neutrons and 3 electrons. What would be formed if one proton is added to this atom?
What are the three major kinds
of rocks?
the three major kinds of rock are
* igneous rock
* sedimentary rock
* metamorphic rock
What is the equation for density?
m
O DE
V
O D= V
m
m
O D =
DE
= 1 mu
D =
mass divided by volume
Answer: This may not work for you
Explanation: Density, mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre.
how many protons are in each of the following
carbon has 6 protons and hydrogen has 1 proton
17. Is the scientific method suitable for solving problems only in
the sciences? Explain.
Answer:
Hey mate
Explanation:
Yes these methods are only used in biology, chemistry, physics, geology and physcology.... They can't be used in maths or other subject, as it is said SCIENCE IS SCIENCE!
Hope it helps you,
mark me the brainliest,
follow me
Which of the following statements is correct about the force of gravity between two objects?
A. it depends on the shape of the objects.
B. It is weaker when the objects are closer.
C. It depends on the temperature of the objects.
D. It is stronger when the objects are closer.
Answer: D
Explanation:
Shape and temperature have nothing to do with gravity. You could take a circle block and a square block and put it on the ground and they will stay there. Gravity is not weaker when objects are closer together because of Newtons law of gravitation.
Answer:
givve them brainliest
Explanation:
A piece of aluminum has a volume of 12 cm3and a mass of 32 g. What is its density? Do not forget the units.
Answer:
The answer is 2.67 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass of metal = 32 g
volume = 12 cm³
The density is
[tex]density = \frac{32}{12} = \frac{8}{3} \\ = 2.6666666...[/tex]
We have the final answer as
2.67 g/cm³Hope this helps you
Answer:
2.67g/cm or 2.67g/cc
Explanation:
which metalloid has three valence electrons
Answer:
boron is your answer :)
Answer:
boron :))
Explanation:
took the test
If you have an initial water level in a graduated cylinder of 15 mL and your
final water level after placing a 2g aluminum piece of metal in it is 19 mL,
what is the density of the aluminum in g/mL?
Formula? Work? Answer?
Answer:
The answer is
0.5 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass of aluminum = 2 g
volume = final volume of water - initial volume of water
volume = 19 - 15 = 4
volume = 4 mL
The density of the metal is
[tex]density = \frac{2}{4} = \frac{1}{2} \\ [/tex]
We have the final answer as
0.5 g/mLHope this helps you
Which lists imaging techniques that use wave behaviors in order of increased risk of cancer from least risk to
greatest?
sonography, X-ray radiography, CT scan
CT scan, X-ray radiography, sonography
sonography, CT scan, X-ray radiography
X-ray radiography, sonography, CT scan
Answer:
sonography, X-ray radiography, CT scan
Explanation:
i like yo cut g
The imaging techniques that use wave behaviors in order of increased risk of cancer from least risk to greatest is:
Option A.
Imaging techniques:These procedures incorporate x-beams, figured tomography filters, and attractive reverberation imaging. These imaging devices let your PCP "see" inside your body to get an "image" of your bones, organs, muscles, nerves, and ligaments. This is a way the specialist can decide whether there are any anomalies.
The imaging techniques that use wave behaviors in order of increased risk of cancer from least risk to greatest are:
A. sonography< X-ray radiography<CT scan
Find more information about imaging techniques are:
brainly.com/question/7642430
When a piston is pushed down on a cylinder, the pressure on the gas in the cylinder increases from 125 kPa to 375 kPa. The initial volume is 3.3 L. What is the final volume?
Answer:
The final volume is 1.1 L.
Explanation:
Given data:
Initial pressure of gas = 125 KPa
Final pressure of gas = 375 KPa
Initial volume = 3.3 L
Final volume = ?
Solution:
The given problem will be solved through the Boly's law,
"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"
Mathematical expression:
P₁V₁ = P₂V₂
P₁ = Initial pressure
V₁ = initial volume
P₂ = final pressure
V₂ = final volume
Now we will put the values in formula,
P₁V₁ = P₂V₂
125 Kpa × 3.3 L = 375 Kpa × V₂
V₂ = 412.5 KPa. L/375 Kpa
V₂ = 1.1 L
The volume of gas is reduced to the 1.1 L because of increasing pressure.
PLEASE HELP!!!!!!!
WILL GIVE BRAINLIEST!!!!!
Describe a volcanic eruption.
Answer:
A volcanic eruption occurs when molten rock, ash and steam pour through a vent in the earth's crust. Volcanoes are described as active (in eruption), dormant (not erupting at the present time), or extinct (having ceased eruption; no longer active).
Please mark as brainliest please
Consider these scenarios. Scenario A: Carmen reads an article in Tasty Food magazine stating that eating an apple can help you feel awake and alert. Scenario B: Yuki reads an article in the Professional Journal of Medicine stating that ginger root can help prevent some types of cancer. Which article is more likely to have been peer reviewed? How do you know?
Answer:
Scenario B
Explanation:
In Scenario B; Yuki reads an article in the Professional Journal of Medicine stating that ginger root can help prevent some types of cancer. The article was published in a professional journal. Manuscripts sent to professional journals for publication must pass through a peer review process in order to ascertain the reliability of the data presented.
Magazine articles may not go through a peer review process since it is not written for the consumption of a professional audience.
Answer:
Sample Response: The article that Yuki read (Scenario B) has been peer reviewed. This article is published in a scientific journal and has been judged for quality by other professionals in the field.
Explanation:
Signs of a chemical change
Answer: There are five signs of chemical change
Color ChangeProduction of an odorChange of TemperatureEvolution of Gas (bubbles start to form)Precipitate (starts to form a solid)When these signs start to form you know chemical change is at work.
Hope this helps :)
A person weighs a different amount on other surfaces in space than they do on Earth because the gravitational pull of each surface is different than that of Earth. The table and graph show the weights of objects on Earth, Mars, and the Moon. Weight on Earth and Mars Weight on Earth, e 90 pounds 120 pounds 160 pounds Weight on Mars, a 36 pounds 48 pounds 64 pounds Weight on Earth and Moon A graph has weight on earth (pounds) on the x-axis, and weight on moon (pounds) on the y-axis. A line goes through points (60, 10) and (120, 20). If a person weighs 240 pounds on Earth, what would be the difference in weight of the same person on Mars and on the Moon (based on the table and graph)? The person weighs 56 pounds more on Mars than on the Moon. The person weighs 56 pounds more on the Moon than on Mars. The person weighs 560 pounds more on Mars than on the Moon. The person weighs 560 pounds more on the Moon than on Mars.
Answer:
A
Explanation:
Answer:
A-The person weighs 56 pounds more on Mars than on the Moon
Explanation:
Just did the test
Which one has more density?
Concrete Block
Styrofoam
Answer:
Concrete block has more density
Convert 7.801,000,000 to scientific notation. x10 what is the exponent for that
Explanation:
7,801,000,000 = 7.801 × 10^9
What do you know for sure after one test? Two tests? Three tests?
The Essential part of Bohr’s Model is
Answer:The model states that electrons in atoms move in circular orbits around a central nucleus and can only orbit stably in certain fixed circular orbits at a discrete set of distances from the nucleus. These orbits are associated with definite energies and are also called energy shells or energy levels.
bohrs model and other models are really hard to understand but i hope this will help you!
Does cool air push warm air upward?
Answer:
Cooler, denser air flows in underneath the warmer, less dense air, and pushes the warmer air upward. When this air cools, it becomes more dense than the warmer air beneath it. The cooled air sinks and moves under the warmer air.
Answer
Hot air is less dense than cold air, which is why hot air rises and cold air sinks, according to the United States Department of Energy. Hot and cold air currents power the weather systems on earth. The sun plays a major role in heating the planet, which also creates hot and cold air energy systems. Warm air currents typically bring rain, because they form over oceans. That’s why hurricanes and tropical storms form at sea and eventually move toward land.
