Answer: Convex mirror is curved in the outward direction and concave mirror in the inward direction.
Explanation:
1. Car rear view mirror: It is a convex mirror which gives the indication of large field of view and it allows the driver to view the traffic behind the car.
2. Security: The reflective bulge surfaces of the convex mirrors reflect the light outwards and provides an expanded field of view of the entire view of shops and other places useful for security.
3. Street light reflectors: They use convex mirrors because they are able to spread the light over the wider area.
4. Shaving facial hair: Concave mirror is used in shaving facial hair. It gives a bigger view of face when it is at the position of pole and focal point of the mirror.
5. Car light: It uses concave mirror because of the converging power it can focus more light rays at a particular point.
A new drug has been released to the public and is popular among
consumers. It is effective in relieving high blood pressure. However, it has
altered some patients' personalities. Which stage of the engineering process
may address this negative side effect?
A. Screening
B. Testing
C. Looking for improvements
D. Evaluating test results
Answer:
c. Looking for improvements
Explanation:
I took the quiz and it was right
Answer: C
Explanation:
just took the test
CaCl2 is a(n)
A. None of these
B. Metallic compound
C. Covalent compound
D. Ionic compound
Answer:
A
Explanation:
becuase CaCI2 Is an inorganic compound
Zn-64 = 48.63%
Zn-66 = 27.90%
Zn-67 = 4.10%
Zn-68 = 18.75%
Zn-70 = .62%
Calculate the atomic mass/given their percent abundance
Answer:
A = 65.46 u
Explanation:
Given that,
The composition of zinc is as follows :
Zn-64 = 48.63%
Zn-66 = 27.90%
Zn-67 = 4.10%
Zn-68 = 18.75%
Zn-70 = .62%
We need to find the average atomic mass of the given element. It can be solved as follows :
[tex]A=\dfrac{48.63\times 64+27.90\times 66+4.1\times 67+18.75\times 68+0.62\times 70}{100}\\A=65.46\ u[/tex]
So, the average atomic mass of zinc is 65.46 u.
Polywool fibre is
a.natural
b.synthetic
c.monomer
d.blended
Polywool fibre is synthetic.
⇒b. Synthetic
Hope It Helps You ✌️
Answer:
[tex]\large{\underbrace{\underline{\fcolorbox{White}{pink}{\bf{b.synthetic }}}}}
[/tex]
some one help please
Answer: oxnzle
Explanation:
Directions: Write True if the statement is correct, if it is not, make the false statement true by changing the underlined word or phrase 1. A constellation is a configuration of stars that form a pattern. 2. The Little Dipper is a part of the constellation Ursa Major 3. The North Star is found in the Little Dipper 4. The North Star is also called Merak. 5. The North Polar Constellations can be seen in the Northern Hemisphere. ales atterns in the night sky constellations
BRAINLIEST+FOLLOW+HEART+RATE
BAD ANSWER-REPORT
MAAYOS NA SAGOT KAILANGAN LANG PO
Answer:
1. A constellation is a configuration of stars that form a pattern. True
2. The Little Dipper is a part of the constellation Ursa Major. False
3. The North Star is found in the Little Dipper.True
4. The North Star is also called Merak. False
5. The North Polar Constellations can be seen in the Northern Hemisphere. ales atterns in the night sky constellations .True
Why does it stop expanding when you stop blowing air into it
Answer:
this is because of collisions of molecules present in that particular system.
Explanation:
For instance, when air is filled in a balloon then the number of the molecules of air inside the balloon increases. As a result more collisions of molecules take place with the walls. This gives rise to high air pressure on the walls which causes the balloon to expand and get inflated.
if you have a pop quiz and you get nervous is that unconditioned response? if yes why? if not what kind of response is it
the process of transmission of heat in air is??A:conduction B:convention C:radiation D:oxidation
Answer:
C:Radiation
Explanation:
Pluto
Answer:
i hope this help
Explanation:
Radiation is a method of heat transfer that does not rely upon any contact between the heat source and the heated object as is the case with conduction and convection. Heat can be transmitted through empty space by thermal radiation often called infrared radiation. This is a type electromagnetic radiation.
CAN SOMEONE PLEASE ANSWER THIS PAGE ILL GIVE YOU ALL MY POINTS
Answer: the equation for the reaction is NH4Cl (s) --> NH3 (g) + HCl (g)
equation for heat reaction:
ΔH25° = (ΔH25° NH3 + ΔH25° HCl) - ΔH25° NH4Cl)
question 2:
the 1st and 3rd reactions are better ontained through refrence sources and the 2nd and 4th are the easiest and safest to measure in the laboratory. The 1st and rd reaction contains noxious gases this is because there is a (g) in both of the reactions. And the 2nd and 4th does NOT contain noxious gases so i assume its the safest to measure out in the lab
If you produce 35.7 grams of sodium chloride how many molecules of Chlorine gas were
needed?
2Na + Cl2 --> 2NaCl
(PLS HELP ASAP)
Explanation:
I did it in steps to help u to understand :)
I need help what is the answer for question 1
Answer: where is the deephorizon slice at ?
Explanation:
The body part of a spirogyra is.............
Answer:
The chloroplasts form a spiral around the vacuole and have specialized bodies known as pyrenoids that store starch. The cell wall consists of an inner layer of cellulose and an outer layer of pectin, which is responsible for the slippery texture of the algae.
Explanation:
The body part of a spirogyra is called pyrenoids .hope it is helpful to you
which organ is used to detect the product of neutralisation reaction
Answer:
Neutralization reactions occur when two reactants, an acid and a base, combine to form the products salt and water.
The organ that is used to detect the product of a neutralization reaction is the sense of taste.
When a neutralization reaction occurs between an acid and a base, it results in the formation of a salt and water. The salt produced in the reaction may have a distinct taste, depending on its chemical properties. For example, when hydrochloric acid reacts with sodium hydroxide, the products are sodium chloride and water. Sodium chloride, commonly known as table salt, has a characteristic salty taste.
Similarly, other salts formed from neutralization reactions may have different tastes. For instance, magnesium hydroxide reacting with acetic acid produces magnesium acetate, which has a slightly sweet taste. By using our taste buds, particularly on the tongue, we can detect and identify the taste of the salt formed during a neutralization reaction.
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C20H16+
_Cl2 →
C+
HCl
Please help me fast
Answer:
1 C10H16 + 8 Cl2 --> 10 C + 16 HCl
Help me and I'll make u Brainly eat and follow u
19. moth balls in the closet and observe after several days.
20. whenever wax or a candle burns it turns from solid to liquid but again at room temperature it turns to solid
21. evaporation, condensation, precipitation
22. it produces new substances
23. vinegar Bubbles when baking soda is added
24. steam
Look at this balanced chemical reaction: N2 + 3H2 2NH3
How many grams of ammonia can be produced from reacting a 450 L sample of nitrogen gas at a temperature of 450 K and a pressure of 300 atm?
Answer: A mass of 124457.96 g ammonia is produced by reacting a 450 L sample of nitrogen gas at a temperature of 450 K and a pressure of 300 atm.
Explanation:
Given: Volume = 450 L
Temperature = 450 K
Pressure = 300 atm
Using ideal gas equation, moles of nitrogen are calculated as follows.
PV = nRT
where,
P = pressure
V = volume
n = no. of moles
R = gas constant = 0.0821 L atm/mol K
T = tempertaure
Substitute values into the above formula as follows.
[tex]PV = nRT\\300 atm \times 450 L = n \times 0.0821 L atm/mol K \times 450 K\\n = \frac{135000}{36.945}\\= 3654.08 mol[/tex]
According to the given equation, 1 mole of nitrogen forms 2 moles of ammonia. So, moles of ammonia formed by 3654.08 moles of nitrogen is as follows.
[tex]2 \times 3654.08 mol\\= 7308.16 mol[/tex]
As moles is the mass of substance divided by its molar mass. So, mass of ammonia (molar mass = 17.03 g/mol) is as follows.
[tex]Moles = \frac{mass}{molar mass}\\7308.16 = \frac{mass}{17.03 g/mol}\\mass = 124457.96 g[/tex]
Thus, we can conclude that a mass of 124457.96 g ammonia is produced by reacting a 450 L sample of nitrogen gas at a temperature of 450 K and a pressure of 300 atm.
sodium is more reactive than magnesium. Give reason
Answer: According to the reactivity of metals Sodium is the second metal while Magneesium is the fourth metal. The metal in the top of the reactivity serise table are more reactive.
(The series obtained by the arrangement of metals in the decending oder of their reactivity is the REACTIVITY SERIES TABLE)
Explanation:
K
Na
Ca
Mg
Al
Zn
Fe
Sn
Pb
H
Cu
Hg
Ag
Pt
Au
Therefore Sodium is more reactive than Magnesium
Answer:
The alkaline-earth metals tend to lose two electrons to form M 2+ ions (Be2+, Mg2+, Ca2+, and so on). These metals are less reactive than the neighboring alkali metal. Magnesium is less active than sodium; calcium is less active than potassium; and so on. These metals become more active as we go down the column.
the liquid left after crystallization is
Answer:
The liquid left after crystallization is called Residue
if sneezing is the response to smelling food is it conditioned or unconditioned
Answer:
i think its unconditioned response.hope it helpsstay safe healthy and happy.A typical scuba tank has a volume of 11 liters and can support a diver for one hour. An adult breathes about 3 liters of air with each breath.
How can an 11-liter tank give a diver enough oxygen for one hour?
Answer:
The correct answer is - at high pressure a huge amount of gases can be stored in less volume.
Explanation:
We already know that pressure is inversely proportional to the volume of gas which means if we increase the pressure the volume of gas becomes less.
P = 1/V
So in the scuba divers tank, the oxygen is filled at very high pressure so the high amount of the oxygen can be filled in less volume and which will last for longer than a normal pressure tank can last.
C₂H₄O₂ + O₂ ➞ CO₂ + H₂O
Answer:
C2H4O2 + 2O2 ==> 2CO2 + 2H2O
Explanation:
Start with the carbons
C2H4O2 + O2 ==> 2CO2 + H2O There are 2 on the left, so you need 2 on the right.
Next deal with the hydrogens. You have 4 on the left so you have to make 4 on the right
C2H4O2 + O2 ==> 2CO2 + 2H2O
The oxygens are the real devil in this question. Be careful how you handle them. There are 2 * 2 = 4 from the CO2 and 2*1 = 2 from the water. The total is 6
Now you can't just put a 3 in front of the O2. There are 2 in the given chemical. So you don't need 6. You need 6 -2 = 4. But the oxygen is O2. You have to divide the 4 by 2 to get 2
C2H4O2 + 2O2 ==> 2CO2 + 2H2O
And that's your answer.
ASAP :))
How would a reaction that occurs without the addition of energy be
described?
A. At equilibrium
B. Spontaneous
C. Nonspontaneous
D. Not at equilibrium
Answer:
B
Explanation:
Exergonic reactions are also called spontaneous reactions, because they can occur without the addition of energy. ... In this case, the products, or final state, have more free energy than the reactants, or initial state. Endergonic reactions are non-spontaneous, meaning that energy must be added before they can proceed.
Exergonic reactions were often known as spontaneous reaction. since they can take place without the expenditure of energy.
What is exergonic reactions?
A reaction wherein energy is emitted mostly in presence of light or heat was known as just an exothermic reaction.
What is spontaneous reaction?
A spontaneous process would be one that happens without the system receiving any outside input.
Because exergonic events could proceed without the supply of energy, they are sometimes known as spontaneous reactions. The products possess greater free energy as compared to the reactants example. Endergonic reactions were non-spontaneous, which means they require the addition of energy before they can begin.
To know more about spontaneous reactions and exergonic reactions
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Define fermentation and how alcohol is produced. Describe distillation, the process used in forming " spirits".
Answer:
Fermentation is where all alcohol is created, distillation is where the alcohol is separated and removed. In order for fermentation to occur, two things are needed: a raw material in liquid form that contains sugar, followed by the addition of yeast.
What is the most common isotope for element X
Answer:
isotope 2
Explanation:
it has the highest percentage abundance
I am so lost Helppp! step by step would be great and any links would help!
Answer: i dont know
Explanation:
một oxit của photpho có thành phần trăm của P bằng 43,66% . Biết phân tử khối của Axit bằng 142đvC. Công thức hóa học của Axit là ?
Answer:
câu trả lời trong hình ảnh
he ______ is the depth in the ocean at which calcareous skeletal material first begins to dissolve. Multiple choice question.
Answer: lysocline
Explanation:
Lysocline is the depth in the ocean at which calcareous skeletal material first begins to dissolve. It is the depth of the ocean whereby the dissolution rate of calcite has a dramatic rise.
Lysocline is also referred to as the transition zone upper bound where the CaCO3 content drops.
The Austrian monk and scientist Gregor
studied the traits of pea plants. He could see that pea plant traits were passed from parents to offspring in a process called
.
Answer:
Mendel, Inheritance/Heredity
Explanation:
Gregor Mendel (1822-1884) was an Austrian monk and scientist as stated in this question. He is referred to as the FATHER OF GENETICS due to his immense contributions to the principle of inheritance.
Gregor Mendel via his several works conducted on pea plants was able to demonstrate how traits passed down from parents to offsprings in a process called INHERITANCE OR HEREDITY.
Your Answer is : 1st Mendel and 2nd heredity.
Explanation:
One way of purifying gaseous H2 is to pass it under high pressure through the holes of a metal's crystal structure. Palladium, which adopts a cubic closest packed structure, absorbs more H2 than any other element and is one of the metals currently used for this purpose. Although the metal-hydrogen interaction is unclear, it is estimated that the density of absorbed H2 approaches that of liquid hydrogen (70.8 g/L). What volume (in L) of gaseous H2, measured at STP, can be packed into the spaces of 1 dm3 of palladium metal
Answer:
[tex]V=795.26L[/tex]
Explanation:
From the question we are told that:
Volume [tex]V=1dm^3=>1L[/tex]
Density [tex]\rho=70.8g/L[/tex]
Generally the equation for Density is mathematically given by
[tex]\rho =\frac{Mass}{Volume}[/tex]
Therefore
[tex]M=\rho*V[/tex]
[tex]M=70.8*1[/tex]
[tex]M=70.8g[/tex]
Since at STP
[tex]T=273K[/tex]
[tex]P=1atm[/tex]
[tex]Mass =70.8g[/tex]
Therefore
[tex]Moles\ of\ Hydrogen=\frac{Mass}{2g}[/tex]
[tex]Moles\ of\ Hydrogen=\frac{70.8}{2g}[/tex]
[tex]Moles\ of\ Hydrogen=35.4moles[/tex]
Generally the equation for Ideal gas is mathematically given by
[tex]PV=nRT[/tex]
Therefore
[tex]V=\frac{nRT}{P}[/tex]
[tex]V=\frac{35.4*0.0826*273}{1}[/tex]
[tex]V=795.3L[/tex]
