What are some differences between a main sequence star and a red giant?
Answers
Answer:
Some notable differences between a main sequence star and a red giant are its sizes and color. Red Giants tend to typically be, well, red. The output of a red giant is so much greater than that of a main sequence. A red giant is the last stage of a main sequence star's life. Another difference is what occurs inside the star. Main sequence stars fuse hydrogen together in order to keep gravity from imploding the star, while red giants run short of hydrogen and fuses helium.
Diagram:
Related Questions
Which chemical equation best represents the process of photosynthesis?
Answers
Answer:
6CO2 + 6H20 ----> C6H12O6 + 6O2
Explanation:
(Carbon Dioxide) + (Water) ------> (Glucose) + (Oxygen)
Answer:
A
Explanation:
CO2= carbon dioxide
H2O= water
C6H12O6=glucose
O2=oxygen
state two uses of graphite which depends on the above properties
Answers
Hurry Find the slope for the liner relation described in the table
Answers
Answer:
2.75
Explanation:
For every ride taken the money spent goes up by $2.75.
What does the chemical formula CaCl2 show about the compound it represents?
A.It is made up of one element.
B.It is made up of two elements.
C.It is made up of three elements.
D. It is made up of four elements.
Help asap please
Answers
Answer:
b
Explanation:
Explanation :
Calcium and chlorine
DESCRIBE TROPICAL STORM; THUNDERSTORM; AND TORNADOES
PLEASE HELP ME THIS IS DUE AT 1:45 PM AND IT'S 1:22 OM PLEASEEEE helppp!!1
Answers
Answer:
a tropical strom is when theres a lot of rain and it almost developed into a hurricane and a thunderstorm is rain with lightning and thunder but not that bad like a tropical storm and a tornado is when there is a huge gust of win that is formed in a circle like shape and could cause damage to homes
Explanation:
Given the balanced equation representing a reaction:
4Al(s) + 3O2(g) → 2Al2O3(s)
Which type of chemical reaction is represented by this equation?
Answers
Answer:
The equation is already balanced.
The type of chemical reaction is oxidation
Explanation:
Oxidation is the addition of oxygen to a substance
Answer:
This type of reaction is a synthesis reaction
Explanation:
Can someone tell me the answer for this!!!
Answers
Answer:
Rutherford predicted that an atom has a dense core called a nucleus.
Explanation:
Ernest Rutherford was a physicist who is known as the father of nuclear physics. He suggested an atomic model known as the Rutherford model. According to him, the atom consists of a tiny, dense, positively charged core called a nucleus and negatively charged particles called electrons that circulate around it The nucleus consists of positively charged particles called protons and neutral particles called neutrons.
“Different periods in human history are named for the materials used to make tools. Dr. Franklin is searching through layers of soil, looking for tools made by humans. After screening the top layer of soil, he uses a magnet to help speed up the search.”
Which type of location is Dr. Franklin most likely searching?
A) a cave from before the Stone Age
B) a Stone Age cave
C) a Bronze Age battle site
D) an Iron Age farm
Answers
Answer:
Iron age farm
Explanation:
edge 2020
Answer:
D
Explanation:
Got it right on edge
- All the metals of group 1 react with water, liberating hydrogen gas and forming metal
hydroxides. Suppose you are provided with a piece of metal stored in a bottle labelled as
‘Rubidium’. Based on your knowledge of the periodic table explain why it is not safe to
dispose it in sink with water?
Answers
Answer:
since it is in grp 1, it will react with water like all other metals.
Answer:
Rubidium, as a Group 1 metal, will have a strong reaction with the water and form hydrogen. The reaction is so strong it might even be explosive, hence the danger of putting it in water.
Explanation:
Hope this helped!
The mass of an object is 32g and its density is 17g /mL. what is its volume
Answers
Explanation:
here,
Mass (m)= 32 g =0.32 kg
Density(d)= 17 g/ml
volume (v)=?
we know that,
d=m/v
17=0.32/v
v= 0.32/17
v=0.018
Answer:
[tex]\boxed {\boxed {\sf v \approx 1.88 \ mL}}[/tex]
Explanation:
The density formula is:
[tex]d=\frac{m}{v}[/tex]
If we rearrange the formula for volume, the result is:
[tex]v=\frac{m}{d}[/tex]
The mass of the object is 32 grams. The density is 17 grams per milliliter.
[tex]m= 32 \ g\\d= 17 \ g/mL[/tex]
Substitute the values into the formula.
[tex]v=\frac{32 \ g}{17 \ g/mL}[/tex]
Divide. Note that the grams, or g, will cancel each other out.
[tex]v=\frac{32 }{17 \ mL}[/tex]
[tex]v=1.88235294 \ mL[/tex]
Let's round to the nearest hundredth to make the answer more concise.
The 2 in the thousandth place tells us to leave the hundredth place as is.
[tex]v \approx 1.88 \ mL[/tex]
The volume of the object is about 1.88 milliliters.
What a higher or lower temperature make particles in a substance move faster
Answers
Answer/Explanation:
A higher temperature causes the molecules in a substance to move faster in a chemical change. This increased speed allows the particles to have enough force for a chemical change and it also increases the amount of times a particle hits another this makes it faster for it to combine.
Niels Bohr’s model of the atom helped to explain
Answers
Answer:
a theory for the hydrogen atom based on quantum theory that energy is transferred only in certain well defined quantities. Electrons should move around the nucleus but only in prescribed orbits.
Explanation:
A proton has a charge that is opposite the charge of
Answers
proton=positive charge
electron=negative charge
What separation method collects vapor
Answers
Answer:
evaporation and distilation
Explanation:
What transition energy corresponds to an absorption line at 527 nm?
Answers
Answer:
E = 3.77×10⁻¹⁹ J
Explanation:
Given data:
Wavelength of absorption line = 527 nm (527×10⁻⁹m)
Energy of absorption line = ?
Solution:
Formula:
E = hc/λ
h = planck's constant = 6.63×10⁻³⁴ Js
c = speed of wave = 3×10⁸ m/s
by putting values,
E = 6.63×10⁻³⁴ Js × 3×10⁸ m/s / 527×10⁻⁹m
E = 19.89×10⁻²⁶ Jm /527×10⁻⁹m
E = 0.0377×10⁻¹⁷ J
E = 3.77×10⁻¹⁹ J
Answer:
D
Explanation:
a p e x
What happens to the atoms of most non-metals when they react with other elements like metals?
Answers
Explanation:
Atoms of non-metal usually gain electrons when
they react with other elements.
Eg -
Na· + ·Cl → Na⁺Cl⁻Therefore,
Option A is correct ✔
Please help brainiest is award!
Answers
salacties and stalagmites are formed in a cave due to deposition of carbonates when temporary hard water evaporates, please help me I will mark u brainlist true or false
Answers
The answer is True because they are formed of deposition.
Las disoluciones comerciales de HCl (PF = 36.5 g/mol) típicamente son 39.0% P/P de este ácido en agua. Determine la molalidad de la disolución del HCl si la densidad de la misma es igual a 1.20 g/ml.
Answers
The translation of the question is
Commercial solutions of HCl (MP = 36.5 g / mol) are typically 39.0% W / W of this acid in water. Determine the molality of the HCl solution if its density is equal to 1.20 g / ml.
Answer:
Molality is 17.51 molal
Explanation:
We are given 39% w/w of HCl, this means for every 100g of this solution we have 39g of HCl in it.
to ease the calculation we assume we have 1L(1000ml) of this solution is present.
Density = mass /volume
1.20 = mass/1000
mass = 1200 g of solution
and we are given that 39% of this solution is will contain HCl
so
1200 * 39/100 = 468g of HCl present
no of moles of HCl = 468/36.5 = 12.82moles
mass of solution = mass of water + mass of acid
mass of water = mass of solution - mass of acid
Mass of water = 1200 - 468 = 732g of water
Molality = moles /masss of water in kg
= 12.82 *1000/732 =17.51molal
Mendel's early studies led scientist to discover what in 1953?
RNA
DNA
GMO
Answers
Answer:
DNA
Explanation:
DNA
Mendel's early studies led scientist to discover what in 1953 is DNA
Answer:
DNA
Explanation:
luv you <3
As a car slows down, its kinetic energy increases.
True
False
Answers
Answer:
False.
Explanation:
Kinetic energy represents the energy the car has and is using right now. So, if the car was fast, then it would have a lot of kinetic energy. A slow car has a low amount of kinetic energy.
Calculate a sm for the equation below. (Round to the nearest whole number.) 4NH, (g) +50, (g) → 4NO(g) + 6H2O(g) = 192.8 J/mol K SH = 205.0 J/mol K S. SHO = 188.83 J/mol K So = 210.8 J/mol K AS JIK
Answers
Answer:
the answer is 180 j/k i think
Explanation:
Answer: its 79 for the first part and 180 on the second part
Explanation:
A physical change can be distinguished from a chemical change because during a physical change- a. the properties of the substance may change, but no new substances are produced b. the properties of the substance change for only a short time but will return to their original state. c. an entirely new substance with new properties forms as a result of the change d. a new substance is produced, but the new substance has properties identical to the original substance
Answers
Answer:
C. an entirely new substance with new properties forms as a result of the change
Answer:
. an entirely new substance with new properties forms as a result of the change
Explanation:
A group hikes from sea level to a mountain peak. Each letter in the diagram indicates a spot where the group stops to drinks boiling water. At Wich point in the hike does water have the highest point.
Answers
Answer:
oh my god i have learnt about this
Explanation:
Answer:
Point A
Explanation:
I dont know why but it was right on the test.
Which one is non polar covalent Bond 1) H2, O2, HCL. 2)K, Fe, Ca or 3)N2, H2, Cl2
Answers
Answer:
3)N2, H2, Cl2........
Hope this helps
When propane is reacted in the presence of oxygen gas, the products of this combustion reaction are: A. CO + H2O B. CO2 + H2O C. C2H4 + H2O D. CH4 + H2O
Answers
Answer:
B. CO2 + H2O
Explanation:
Propane is an hydrocarbon as it contains only v=carbon and hydrogen atoms.
Whenever an hydrocarbon reacts with oxygen or undergoes a combustion reaction, two products are always formed only,
These two products are;
Carbon dioxide (CO2) and water (H2O)
This means the correct option is option B.
5. Flash floods occur when water collects at a faster rate than the water can be absorbed into the surrounding soil. During a lab investigation, students test water absorption rates for four types of soil, including clay, gravel, loam, and sand. The results from one experiment are provided in the table below. Soil Type Water Absorption Rate for 1L of Water (s) Clay 210 Gravel 45 Loam 180 Sand 60 Based on the data provided, which soil type is most likely to experience a flash flood? help me !!!!!!!!
Answers
Answer:
clay
Explanation:
its more than the rest
What is radioisotope?
Answers
Answer:
An unstable form of a chemical element that releases radiation as it breaks down and becomes more stable. Radioisotopes may occur in nature or be made in a laboratory. In medicine, they are used in imaging tests and in treatment.
Hope I could help!
Answer:
(RAY-dee-oh-I-suh-tope) An unstable form of a chemical element that releases radiation as it breaks down and becomes more stable. Radioisotopes may occur in nature or be made in a laboratory. In medicine, they are used in imaging tests and in treatment. Also called radionuclide.
Explanation:
Which of the following is a physical change?
Sugar dissolving in water
Milk souring
Metal rusting
Paper burning in a fire
Answers
Answer:
sugar dissolving in water
Explanation:
at the end mixing 2 substances and not get a new substance is not a chemical change. the sugar is still sugar even when its in water.
What are the advantages of an electromagnet? PLEASE ANSWER!!
Answers
Answer:
The main advantage of an electromagnet over a permanent magnet is that the magnetic field can be quickly changed by controlling the amount of electric current in the winding. However, unlike a permanent magnet that needs no power, an electromagnet requires a continuous supply of current to maintain the magnetic field