What are some examples of a physical change? (list more than 2 examples)

Answers

Answer 1
Breaking glass
Cutting hair
Folding paper
Chopping wood
Melting ice

Related Questions

chemical reaction occurs when the chemical identity of the reactants is different from that of the products. A new substance forms with different properties from the original react
Evidence that a chemical reaction has occurred can be a color change, light formation, gas bubbles formation, precipitate formation, or temperature change,
Use the following information to answer question 1.
QUESTION 1
Instant cold packs consist of ammonium nitrate and water. When the two are mixed, the temperature changes and becomes colder. It is described using the chemical equation
NH4NO3(s) → NH4+ (aq) + NO3(aq)
LA
Is this an example of an endothermic or exothermic reaction? Why?

Answers

Answer:

Explanation:

Exothermic: the surrounds feel warmer. A wood fire stove is a good example of an exothermic reaction. You can feel the heat on your hands. It's exothermic.

Endothermic is exactly the opposite. The reaction takes place, but the heat comes from the surroundings. When you touch something that goes through an endothermic reaction, it feels much cooler.

This reaction, just by definition is endothermic.

which of the following substances is most soluble in water
a). table salt
b). baking soda
c). Epsom salt
d). table sugar

Answers

Answer:

Table salt

Explanation:

Is most soluble in water

A small container of perfume is opened in a classroom. Soon every student in the room smells the perfume. Explain this in terms of molecules.

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When perfume or cologne is sprayed into the air, it turns into a gas and its particles mix with other air particles that quickly move around the room. This is because gas is the least dense of the three states of matter. It moves quickly into any space or volume because it has the least density. This is called diffusion, when molecules or particles move from areas with high concentration to low concentration areas. 

Different isotopes of an element have different numbers of:

Answers

Explanation:

Different isotopes of an element have different numbers of mass number

What does it mean by solution in salt solution, sugar solution, etc.

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Salt solution means water and salt mixed until dissolved.
Sugar solution means water and sugar mixed until dissolved.

Give braniliness
AH = ?
Select one:
O a. Hproducts/Hreactants
O b. products-Hreactants
O c. Hreactants+H products
O d. Hreactants-Hproducts

Answers

Answer:

I think its C

Explanation:

typhoons are more violent than hurricanes​

Answers

Answer:

i think it is FALSE.

Explanation:

good luck

Elements in a vertical column on the Periodic Table have similar properties and are all members of the same
of elements.
ME
A
molecule
HD
B
phase
С
atom
D
group

Answers

Answer:

Explanation:

I think it's D but I could be wrong

Answer:

D

Explanation:

Which adaptation allowed gymnosperm plants to out-compete spore-bearing plants? stems leaves roots seeds

Answers

your answer would be sm seeds

Which type of reaction is
NaOH + KNO3 NaNO3 + KOH
-->>

Answers

Answer:

Explanation:

NaOH + KNO3 --> NaNO3 + KOH. combustion. CH4 + 2 O2 --> CO2 + 2 H2O. single displacement. 2 Fe + 6 NaBr --> 2 FeBr3 + 6 Na. double displacement.

(01.07 HC)

A student collected the data shown in the table below during an experiment.


Liquid Characteristics
Liquid Characteristics
Boiling Point Freezing Point Color Expansion per Degree Change in Temperature
Mercury 357 °C −39 °C shiny silver gray relatively lower
Alcohol 78 °C −115 °C colorless relatively higher


Based on the data, which of the following conclusions can be made about the use of mercury and alcohol thermometers?
A mercury thermometer can measure the freezing point of a liquid that freezes at −80 °C.
An alcohol thermometer can measure the boiling point of a liquid that boils at 80 °C.
A mercury thermometer is better to measure very small changes in temperature.
An alcohol thermometer is better to measure the boiling points of colorless liquids.

Answers

Answer: a mercury thermometer is better to measure very small changes in temperature

Explanation:

i took the test and got it right

Answer:

the answer is C, a mercury thermometer is better to measure very small changes in temperature.

Explanation:

i just took the test and it was correct :)

what does the heisenberg uncertainty principle state

Answers

Answer: It states that there is a fundamental limit to what one can know about a quantum system.

Explanation:

______= Speed / Wavelength

Answers

Answer:

Frequency

Explanation:

It’s kinda self-explanatory but bascially speed=wavelength times frequency

Answer:

Frequency is Speed divided by Wavelength

Step-by-step explanation:

Don't think there needs to be an explanation for the formula, unless you want the conceptual understanding

Give atleast 5 differences in cell structures of plant and animal cells

Answers

The shape, the cell wall, chlorophyll, the components of the nucleus, cytoplasm

Name these ionic compounds
12. Ag3N
13. NaF
14. Ba
15. Na2S
16. AIBr;
17. LiN
18. KF
19. Srl2
20. Mgo
21. Al2O3
22. CaH2

Answers

12. silver nitride

13. Sodium fluoride

14. barium

15. sodium sulfide

16. aluminium bromide

17. lithium nitride

18. potassium sulfide

19. strontium iodide

20. magnesium oxide

21. aluminium oxide

23. calcium hydride

What does the electron configuration for the noble gases tell us about the elements in the
group

Answers

Answer:That all noble gases will have 8 valence electrons which makes a atom stable

Explanation:

What is the mass number (A) of an atom that has an atomic number (Z=26) with 29 neutrons and 26 electrons?​

Answers

The mass number (A) of this atom is 55

Atom information–

Atomic number (Z) = 26Protons (p⁺) = 26Neutrons (n⁰) = 29Electrons (e⁻) = 26

The atomic number (Z) of an atom is the number of protons (p⁺) it has

The mass number (A) of an atom is characterized by the sum of the amount of protons (p⁺) with its neutrons (n⁰)

Substituting values –

[tex]\qquad[/tex] [tex]\twoheadrightarrow\bf A=p^{+}+n^{0}[/tex]

[tex]\qquad[/tex] [tex]\twoheadrightarrow\bf A=26+29[/tex]

[tex]\qquad[/tex] [tex]\twoheadrightarrow\bf A=55[/tex]

____________________________________________

The atomic mall mass is an element depends upon the.

Answers

Answer:

Mass and relative abundance of each isotope of that element

The atomic mass of element has been dependent on  mass of each isotopes and their abundance in nature.

The atomic mass has been the mass of neutrons and protons of the element. There has been the presence of the isotopes of the elements, with varying abundance, and varying atomic masses.

The atomic mass of the element has been the relative average atomic mass of the element with respect to the mass of the isotopes and their percent abundance.

The average atomic mass (amu) has been given by:

[tex]amu=M_1A_1\;+\;M_2A_2[/tex]

Where, [tex]M_1A_1[/tex] has been the atomic mass and abundance of isotope 1.

[tex]M_2A_2[/tex] has been the atomic mass and abundance of isotope 2.

Thus, the average atomic mass has been dependent on mass of each isotopes and their abundance in nature.

For more information about the atomic mass, refer to the link:

https://brainly.com/question/5566317

The three nuclides, U-233, U-235, and U-238, are isotopes of uranium because they have the same number of protons per atom and

Answers

Answer:

Electrons

Explanation:

Isotopes are atoms which have the same number of protons and electrons but a different number of neutrons. This is also the reason why there are no other changes in the atom but the mass of the specific atom changes.

Hope this helps :)

Merry Christmas. Have fun.

6.23 X 10^6 KL + 5.34 × 10^6 kL

Answers

I’m standard form it will be 11570000 KL or in scientific notation 1.157x10^7

How many grams of ammonia are produced from 6 moles of nitrogen?

Answers

How many grams of ammonia are produced from 6 moles of nitrogen?
Answer: The equation is 3H2 + N2 → 2NH3

If 6 moles of H2 gas react with N2 (assuming all reactants react)

6 * 2/3 moles of ammonia must be produced.

Therefore 4 moles of ammonia can be produced.

Since it is a gaseous equation (all reactants/products are gases), we can just assume that the Mr of the gases do not affect the amounts of the reactants or the products.

PLEASE HELP ME I NEED HELP ASAP SO BADLY

Answers

Answer:

160.3 g S

Explanation:

hydrofluoric acid
What’s the formula

Answers

Hydrofluoric acid/Formula

______________________

HF

______________________

o0o0o0o0o0o0o0o0o0o0o0

Which non metal is highly reactive

Answers

Answer:

element fluorineThe most reactive nonmetals reside in the upper right portion of the periodic table. Since the noble gases are a special group because of their lack of reactivity, the element fluorine is the most reactive nonmetal.

How many grams of iron are in 350 mg of iron? *
O A. 3.50 g
O B.0.350 g
O C.35.09

Answers

Answer:

It s B because 350 mg= 35.0cg=3.50dg=0.350

Answer:

its 0.350 letter B

Explanation:

im pretty sure you divide the mass value by 1000 to get you answer.

In a bond between potassium (K) and bromine (Br),

A.

the potassium atom will gain an electron and become smaller as a cation, while the barium atom will lose an electron and become bigger as an anion.

B.

the potassium atom will lose an electron and become smaller as an anion, while the barium atom will gain an electron and become bigger as a cation.


C. the potassium atom will gain an electron and become smaller as an anion, while the barium atom will lose an electron and become bigger as a cation.

D.

the potassium atom will lose an electron and become smaller as a cation, while the barium atom will gain an electron and become bigger as an anion.

Answers

Answer:

D (But as a heads up, you wrote barium instead of Bromine)

Explanation:

The Potassium atom will lose an electron since its valence shell only has one, while Bromine has 7 electrons in its valence shell. Potassium wants to get rid of its one electron, Bromine wants to gain that one electron to get a full shell.

Potassium will become a CATION with a positive charge (since it lost an electron), Bromine will become an ANION with a negative charge (since it gained an electron)

PLZZZZ HELP MEEE I WILL GIVE BRAINLYEST I need more then ever so can you can pls help a bro out I need this done in before 5:00 it 2:00 now

Answers

Answer:

If it becomes buried deep into the earth and it is open to increased temperate and pressure. Then an Igneous rock could be Metamorphic. This process can take a lot of time but eventually the rock will change due to pressure andbhigher temperatures.

PLEASE DON'T PUT ANSWER AGAINST GUIDELINES!!!

Answers

Answer:

160.3 g S

Explanation: there you go

3CaCl2 + Al2O3 —> 3CaO + 2AlCl

Answers

im not sure about the answer sorry in advance if it's wrong

What is the dependent variable in this graph

Answers

Answer:

height (mm)

Explanation:

The independent variable belongs on the x-axis (horizontal line) of the graph, and the dependent variable belongs on the y-axis (vertical line).

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