What process that occurred in the Midwestern United States in the 1930s is now occurring in the Sahel region of Africa, south of the Sahara Desert?
Industrial pollution
Radioactive soil
Over fertilization of streams
Dust storms and desertification
Answer:
dust storms and desertification
Explanation:
Answer:
Dust storms and desertification
Explanation:
What is the wavelength of a light wave with a frequency of 8.96 x 1014 Hz
In a nuclear power plant, what is used to change water into steam?
A. the burning nutrual gas
B. geothermal energy
C. captured solar energy
D. heat released from nuclear fission reactions
Answer:
D
Explanation:
Give reasons.
a.Steel is an alloy.
b.Sodium is a metal.
Answer:
steel is an alloy because steel when other elements comprising metals and nonmetals are added to Carbon steel , alloy steel is formed.Sodium is a metal because it is highly reactive metal.it is the member of alkali metal family about the periodic table .it has one electron in the outermost electron shell.Explanation:
Hope it's help !
Which graph represents an object that is decreasing in speed
Answer:
The first one
Explanation:
please help and show work, i will mark you brainlest
Answer:
7x-2(3-4)-2
Pls help
Explanation:
1. What mass (in g) of nitrogen are needed to react completely with 5.8 g of hydrogen?
N2 + 3H2 + 2NH3
5.8 g N2
81 g N2
76 g N2
27 g N2
Answer:
27g N2
Explanation:
Observe the data chart below and explain how the mass of each ball affects its motion.
Baseball Bowling Ball Beach Ball Tennis Ball
400 grams 900 grams 10 grams 60 grams
answer
The beach ball will go the farthest because it's the lightest.
The tennis ball will go second farthest because it is the second lightest.
The baseball will go the third farthest because it is th third lightest'
The bowling ball will go the least far because it is the last farthest
From the given data chart, the way the mass of each ball affects its motion is that;
The highest mass will have the slowest motion while the least mass will have the fastest motion.
We are given;
Mass of baseball = 400 g
Mass of bowling ball = 900 g
Mass of beach ball = 10 g
Mass of tennis ball = 60 g
Now, according to Newton's first law of motion, the greater the mass of an object, the greater the inertia. This means that objects of higher mass would travel at slower motion than objects of lower mass because objects of higher mass would possess greater inertia.
Thus, looking at the masses of the objects given, the highest mass is 900g which is the mass of the bowling ball. Thus, it will be the slowest.
Next is baseball with 400g which is the third fastest motion.
Next is tennis ball with 60 g which is the second fastest motion
Next is beach ball with 10 g which is the fastest motion.
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convert the chemical formula NA(NO2) into a chemical name
Answer:
sodium nitrite..
Explanation:
Answer:
Sodium nitrite is an inorganic compound with the chemical formula NaNO2. It is a white to slightly yellowish crystalline powder that is very soluble in water and is hygroscopic
Definition: An inorganic sodium salt having nitr...
ChEBI Name: sodium nitrite
Explanation:
Seismic waves travel at different speeds according to type.
What is the speed of seismic waves from fastest to slowest?
L waves, S waves, P waves
P waves, L waves, S waves
P waves, S waves, L waves
S waves, L waves, P waves
Answer:
I believe the answer would probably most likely read D in my point of view that's what I think so I can get the answer wrong
Answer:
D
Explanation:
An irregular shaped piece of metal wha a mass of 0.251 lb was placed into a graduated cylinder containing 50.00 mL of water; this raised the water to 67.50 mL.
What is the density, in g/cm3, of the metal?
Answer:
[tex]\rho= 6.51g/cm^3[/tex]
Explanation:
Hello!
In this case, since the density is defined as the degree of compactness of a substance, and is defined as the mass over the volume:
[tex]\rho= \frac{m}{V}[/tex]
Given the displaced volume, we can compute the volume of the piece of metal via the following subtraction:
[tex]V=67.50mL-50.00mL=17.50mL=17.50cm^3[/tex]
Since the piece of metal displaces the water to the final volume. Moreover, given the mass in lb, we compute it grams as follows:
[tex]m=0.251lb*\frac{453.6g}{1lb} =113.85g[/tex]
Thus, the density turns out:
[tex]\rho= \frac{113.85g}{17.50cm3}\\\\\rho= 6.51g/cm^3[/tex]
Best regards.
plz help me out!!!!!
Is there a common denominator for elastic shocks, completely inelastic shocks and explosions?
Answer:
i am not 100% sure but im pretty sure there is.
Explanation:
Pick the correct answer. The waves cause the particles to vibrate
A.slower than the sound source
B.at the same rate as the sound source
C.faster than the sound source
Answer:
its a
Explanation:
give me brainliest plzz
Among electromagnetic waves, UV rays are most dangerous because exposure to these radiation cause serious problems in living organism. The correct option is option A.
What is electromagnetic wave?Electromagnetic wave is a wave which contain two component one is electric component and other is magnetic component. The electric and magnetic component are perpendicular to each other. There are so many wave that comes under electromagnetic wave like infrared wave , radio wave, light wave.
There is a relation between frequency of wave, and wavelength of wave
Mathematically,
E=hc/λ
where,
E = energy of electromagnetic wave
h is planks constant having value 6.67×10⁻³⁴js
c is speed of light that is 3×10⁸m/s
λ is the wavelength of electromagnetic wave
The vibration of particles near the sound source is higher than in the wave.
Therefore, the waves cause the particles to vibrate slower than the sound source. The correct option is option A.
.
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Transfer of Energy
What is the transfer of energy that
occurs when you use your iPod to
listen to music?
E. sound to electric
F. mechanical to sound
G. thermal to sound
H. chemical to sound
A teacher place a plastic cup of one coffee with a lid and the freezer which statement describes the frozen coffee in comparison with the warm coffee
Answer: The amount of coffee is the same
Explanation: This was the correct answer for me.
Answer:the amount of coffee is The same
Explanation:I took the test
Element X has an average atomic mass of 64.32 amu. If this element consists of only two isotopes, X-64 and X-65, which isotope is present in the greater abundance? Explain how you can tell.
Answer:X-64 is closer to the atomic mass of 64.32 amu. The one on the periodic table is the isotope most common in nature.
Explanation:
The average atomic mass of an element can be calculated from the percentage abundance and atomic masses of its isotopes. The atomic mass of the element is 64.32 amu which is near to the mass of X-64. Thus the percentage abundance of X-64 will be greater.
What is isotope?Isotopes are atoms of same atomic number and different mass numbers. There many elements which are having both stable and unstable isotopes. The unstable isotopes may undergo radioactive decay and forms a new stable isotope.
Let the fraction of abundance of X-64 be x and the that of X-65 is 1-x. Since total is 100%. Now,
64 (x) + 65 (1-x) = 64.32
x = 0.68.
Thus percentage abundance of X-64 is 68 % and that of X-65 is 100 - 68 = 32 %.
Therefore, the percentage abundance of the element X with isotopes X-64 is having greater abundance.
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equation for the oxidation of octane.
Answer:
I think its 2 C8H18 + 25 O2 = 18 H2O + 16 CO2
Im not sure!
Explanation:
The density of lead is 11.4g/cm3. What volume, in ft3, would be occupied by 10.0 g of lead?
Answer:
3.10×10¯⁵ ft³.
Explanation:
The following data were obtained from the question:
Density (D) of lead = 11.4 g/cm³
Mass (m) of lead = 10 g
Volume (V) of lead =.?
Density (D) = mass (m) / Volume (V)
D = m/V
11.4 = 10 / V
Cross multiply
11.4 × V = 10
Divide both side by 11.4
V = 10 / 11.4
V = 0.877 cm³
Finally, we shall convert 0.877 cm³ to ft³. This can be obtained as follow:
1 cm³ = 3.531×10¯⁵ ft³
Therefore,
0.877 cm³ = 0.877 cm³ × 3.531×10¯⁵ ft³ /1 cm³
0.877 cm³ = 3.10×10¯⁵ ft³
Thus, 0.877 cm³ is equivalent to 3.10×10¯⁵ ft³.
Therefore, the volume of the lead in ft³ is 3.10×10¯⁵ ft³.
Once at the top. the wax molecules begin to___________ energy to the glass then the surrounding air.
release
gain
Answer:
release
Explanation:
A that is the answer
Which condition is necessary for a mold fossil to form? The fossil must be preserved in amber. Minerals must replace the remains. The mold must be filled with sediment. Hard parts of the organism must dissolve.
Answer:
Hard parts of the organism must dissolve
Explanation:
I just took the quiz/test and got it right
Answer:
Hard parts of the organism must dissolve
Roger has a car that accelerates at 5 m/s2. If the car has a mass 0f 1000 kg, how much force does the car produce?
Answer:
The answer is 5000 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 1000 × 5
We have the final answer as
5000 NHope this helps you
Answer:
5OOON
Explanation:
IM SMARTTT
What is the numbers of electrons in Calcium?
Answer:
The number of electrons in Calcium is 20.
Answer:
20 electrons
Explanation:
Number of electrons = Number of protons = Atomic number
Calcium = 20 electrons
A 50.0 ml sample of 0.200 M HNO2 (weak acid) is titrated with 0.400 M
KOH. Calculate the pH after addition of 25 ml KOH (Ky for HNO, is 4.6 x
10-4)
O a 6.67
O b. 7.67
O c.8.23
O d. 9.12
pH = 8.23
Further explanationReaction
HNO₂+KOH⇒KNO₂+H₂O
mol HNO₂ = 50 x 0.2 = 10 mlmol
mol KOH = 0.4 x 25 = 10 ml mol
Both of them completely react, resulting in hydrolysis salt which is composed of weak acids and strong bases
Formula :
[tex]\tt [OH^-]=\sqrt{\dfrac{Kw}{Ka}.M }[/tex]
Kw = water constant = 10⁻¹⁴
Ka = 4.6 x 10⁻⁴
M = anion (salt) concentration =
[tex]\tt \dfrac{mol~KNO_2}{total~volume}=\dfrac{10}{50+25}=0.133~M[/tex]
[tex]\tt [OH^-]=\sqrt{\dfrac{10^{14}}{4.6\times 10^{-4}} }\times 0.133\\\\(OH^-)=1.7\times 10^{-6}\\\\pOH=6-log~1.7=5.77\\\\pH+pOH=14\\\\pH+5.77=14\\\\pH=8.23[/tex]
What is the relationship between atoms and malodorous
what is 3.8 times 3.8
Answer:
14.44
Explanation:
Answer:
14.44
Explanation:
If you take a pencil and do the math on paper you will get 14.44 :)
Is it true that changes that occur to Earth's landforms are never man-made.
At STP, what is the volume of 4.50 moles of nitrogen gas?
A) 167 L
B) 3420 L
C) 101 L
D) 60.7L
HELP ASAP PLZ!!!! Balance the following equation using whole numbers. What is the coefficient for SiO2? Si12H26+O2⟶SiO2+H2O
Answer:
I believe Si12H26+02 is the coefficient I might be wrong, Sorry if I am.
which element exists as a diatomic molecule at STP
The elements with standard temperature ,pressure, are the diatomic molecules like hydrogen, nitrogen, chlorine and oxygen.
What is diatomic molecule ?Two atoms are chemically linked in order to create diatomic molecules. They make up a homonuclear diatomic molecule if the two atoms are the same, such in the oxygen molecule (O2), for example in the case. If the atoms are different.
Diatomic molecules are two-atom-only molecules, which can contain the same or different chemical components. A diatomic molecule is a structure made up of two atoms that were already connected together. Examples include carbon monoxide, oxygen, nitrogen, and hydrogen (H2) (CO).
Thus, hydrogen, oxygen, nitrogen are the element exists as a diatomic molecule at STP.
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Choose all the answers that apply.
Which of the following forces require physical contact?
tension
nair resistance
friction
magnetic force
applied force
Answer:
Friction, tension, air resistance requires physical contact .
