Answer:
Explanation:
Let me start with a simple one:
An ice cube ( solid ) changing into water ( a liquid )
Another example:
Dry ice ( solid ) submiling.
HOPE IT HELPES
2) In science there are fundamental units and derived units. Derived units are arrived at by combining
two or more fundamental units in some way. Which ONE of the following is a derived unit?
A) Meter
b) second
C) Kelvin
D) g/cm3
Which material will heat the fastest?
Answer:
Lead
Explanation:
Lower the specific heat faster it will heat, meaning liquid will heat up slowly than any other material mentioned above. Thus lead will heat up faster
A. How well do the continents fit together?L
I
Which of the following would not be classified as a result of climate change?
A. Expanding glaciers
B. Increased droughts
C. Extreme weather
D. Rising sea levels
Answer:
all
Explanation:
because they all are someone related to climate change
Answer:
your awnser would be expanding glaciers.
Explanation:
have a nice day hope this helps
The atomic number, or _____ number, is the described as the number of _____ in the nucleus of an chemical element.
Answer:
proton number
protons
Explanation:
Answer:
Proton, protons
Explanation:
The atomic number, or proton number is described as the number of protons in the nucleus of an chemical element. Electrons change on the atom/ion and neutrons change in the isotopes but the number of protons always stays the same and is considered a unique atom identifier.
Convert 1.350 atm into mmHg
Answer:
1026
Explanation:
Pressure
1.35
Standard atmosphere
=
1026
Millimetre of mercury
Formula
multiply the pressure value by 760
Answer:
multiply the pressure value by 760
2. Matter can be described and classified by its observable properties. One property of solids, liquids, and gasses is they all have volume. Which statement best defines the volume of an object?
A. The amount of space that matter occupies
B. The amount of matter in an object
C. The measure of the force of gravity on an object
D. The number of grams in one cubic centimeter
3.When matter changes from a solid to liquid or from liquid to gas, what kind of change takes place?
A.Chemical change
B. Physical change
C. Thermal change
D. Energy change
4. Darius tears a page of newspaper into pieces to start a campfire. What kind of changes taking place as the paper is torn?
A. A change in matter
B. A change in the substance
C. A change in physical property
D. A change in chemical property
5. Mina is attending cooking school, where she prepares a different mixtures of ingredients. She works with homogenous and homogenous mixtures. Today she is using honey and salsa. What kind of mixtures are these ingredients?
A.Neither is a mixture.
B. They’re both homogenous
C. One is homogenous and the other is heterogeneous.
D. They are both heterogeneous.
When a substance has large or strongly extracted particles, they do not flow freely. For example, water flows very quickly compared to honey. Which property of liquids does the example illustrate?
A. Surface tension
B. viscosity
C. Amorphousness
D. Crystallinity
Volume is amount of space that matter occupies ,when matter changes from solid to liquid to gas, physical change takes place,tearing of paper is change in physical property ,honey is homogenous and salsa is heterogenous ,property of liquid which is described is viscosity.
What are physical changes?
Physical changes are defined as changes which affect only the form of a substance but not it's chemical composition. They are used to separate mixtures in to chemical components but cannot be used to separate compounds to simpler compounds.
Physical changes are always reversible using physical means and involve a change in the physical properties.Examples of physical changes include melting,boiling , change in texture, size,color,volume and density.Magnetism, crystallization, formation of alloys are all reversible and hence physical changes.
They involve only rearrangement of atoms and are often characterized to be changes which are reversible.
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Which statement does NOT correctly compare silicon with another element?
o Silicon is a better conductor of electricity than sulfur.
Silicon conducts electricity as well as copper does
Silicon is a solid at room temperature, but argon is a gas.
Silicon is less malleable than silver.
Answer:
the second choice
Explanation:
silicon is a semiconductor, so it does not conduct electricity as well.as copper
The statement, Silicon conducts electricity, as well as copper, does not correct compare the two elements.
Silicon is a colorless, odorless, and stable element. It can act as both a conductor and insulator. Silicon can conduct electricity up to a certain extent. Sulfur is able to conduct less electricity. Thus as compared to sulfur, silicon is a better conductor of electricity.
Copper is said to be among the best conductor of electricity. Compared to copper, silicon is not a conductor of electricity and works as an insulator.
Silicon is present in solid state at room temperature, while argon is present as gas at room temperature.
Silicon having a weak force of attractions is less malleable than silver.
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Earth's gravitational potential energy: GPE = mgh = Gravity (9.81m/s2)
Mass (kg) x Height (m)
Kinetic energy: KE=
- 2 mu?
How would you calculate the gravitational potential energy of a 2 kg bottle of
soda falling off of a kitchen table that is 0.76 m tall?
A.
(2) 0.76)
9.8
O B. 20.76)(2)
O c. 120762)
D. (2)(0.76)9.8
Answer:
(2)×(9.8)×(0.76)
Explanation:
Given data:
Mass of bottle = 2 kg
Given height = 0.76 m
Gravitational potential energy of bottle = ?
Solution:
Formula:
Gravitational potential energy = mgh
g = 9.8 m/s²
Now we will put the values in formula.
Gravitational potential energy = 2kg×9.8 m/s²×0.76 m
Gravitational potential energy = 14.896 kg.m².s⁻²
j = kg.m².s⁻²
Gravitational potential energy = 14.896 j
Would the answer here be b?
Answer:No the answer is D
Explanation:The reaction between the reactants occurs only when they collide in correct orientation in space. Greater the probability of collisions between the reactants with proper orientation, greater is the rate of reaction. The orientation of molecules affect the probability factor, p. The simple molecules have more ways of proper orientations to collide.
How/when is gold used
Answer:
Gold has been used to make ornamental objects and jewelry for thousands of years. Gold nuggets found in a stream are very easy to work and were probably one of the first metals used by humans. Today, most of the gold that is newly mined or recycled is used in the manufacture of jewelry.
Please help me!!
Why are there no atoms of elements that have masses as stated on the periodic table?
Answer:
The reason increasing atomic number doesn't always equate to increasing mass is because many atoms don't have the same number of neutrons and protons. In other words, several isotopes of an element may exist
Explanation:
Hope that helps!
An atom emits a photon with energy 7.13 electronvolts (eV). What is the wavelength of the photon?
a. 279 nm
b. 174 nm
c. 114 nm
d. 108 nm
Answer:
Option (b) "174 nm"
Explanation:
Energy of emitted photon is 7.13 eV.
We need to find the wavelength of the photon.
1 eV = 1.6 × 10⁻¹⁹ J
Energy of a photon is given by :
[tex]E=\dfrac{hc}{\lambda}[/tex]
Where, [tex]\lambda[/tex] is wavelength of the photon
Putting all the values,
[tex]\lambda=\dfrac{hc}{E}\\\\\lambda=\dfrac{6.63\times 10^{-34}\times 3\times 10^8}{7.13\times 1.6\times 10^{-19}}\\\\\lambda=1.74\times 10^{-7}\ m\\\\\text{or}\\\\\lambda=174\ nm[/tex]
So, the wavelength of the photon is 174 nm.
Explain the four basic types of chemical reactions. Be sure to include a sample equation for each type. Describe how rate relationships and activation energy are important in chemical reactions.
The scale reads "16.121 grams", which number(s) is/are "estimated by the scale?
Answer:
See explanation
Explanation:
There are different kinds of analytical balances that read the mass of objects weighed in them to one, two, three or four decimal places as the case may be.
Most common analytical balances read the mass of objects to two or three decimal places hence the last 1 after the decimal point are likely to be approximated.
Hence, the scale may read 16.12 as the case may be.
In addition to hot surface temperatures, which characteristic makes Mercury different from Earth?
A. Mercury has rings.
B. Mercury has no moon.
C. Mercury has slow revolutions.
D. Mercury has an atmosphere of carbon dioxide.
HURRY PLS ITS AN EXAM AND ITS TIMING ME
Answer:
Mercury has no moon, too close to the sun
Explanation:
Mercury has no moon which makes it different from earth.
Difference between mercury and earth.The earth has moon but mercury does not.The percentage of carbon dioxide present in atmosphere of mercury is greater than the earth.The mercury has slow revolution as compare to the earth.The mean temperature of mercury is greater than the earth.To learn more about Earth here.
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Hello please help ty
Answer:
C
B
D
A
Could I please have BRAINLIEST.
Use the periodic table to compare the sizes of ionic radii with the corresponding atomic radii or other ionic radii. Choose from smaller and larger in the blanks below: A sodium cation is than a sodium atom. A phosphorus anion is than a phosphorus atom. A magnesium ion is than a sodium ion. A chlorine ion is than a phosphorus ion. A potassium ion is than a sodium ion.
Answer:smaller larger smaller smaller larger
Explanation:
Just took the test on edge
Answer:
smaller
larger
smaller
smaller
larger
Explanation:
on edge
How far is one nautical mile?
If we have only one globe with a sun, which two seasons can it be?
FALL AND WINTER
Answer:
is it fall and winter................
Explanation:
What is the smallest to largest of Cell,atom,neutron,and electron
Identify the difference between natural and artificial dyes.
An organized process used to gather observations and test a hypothesis is an)
a. a problem
b. experiment
C. exercise
d. constant
Answer:
B experiment
Explanation:
given 1kg= 2.20 lbs, how many kilograms are in 338 kg
Answer:
154
Explanation:
the following isotope has
Question 9 of 10
What type of force slows down a skydiver?
A. Gravity
B. Friction
C. Air resistance
O D. Magnetic force
Answer:
C air resistance is the answer
The negatively-charged particle without a real mass that exists outside the nucleus
Electrons should be your answer!
can someone help with number 5?
Does a hypothesis need to be correct for an experiment to be a success? Explain why or why not?
Answer:
No it does not need to be correct to be a success. It would just need to be reasonable and possible for you to do so that you dont hypothesize that animals are actually human because that is unlogical and impossible
Explanation:
Answer:
No, of course not.
Explanation:
The goal of a hypothesis is for the researchers to determine whether or not they accurately guessed what would happen in their experiment. The fact that the hypothesis was right or wrong has no effect other than if the researchers had a correct educated guess.
Is this right?
Can you please help
Thanks
Answer:
yes, I think
Explanation:
