Answer:
I think its (B)
Explanation:
as when the air thins out at higher elevations, your lift decreases so at some point, the plane cant produce enough lift to overcome gravity.
Please help! I’ll mark brainliest for best answer!
Answer:
The Atomic Number
Explanation:
The X would be the Atomic Number or amount of protons sorrounding the nucleus of that atom.
Can somebody help me with this??!
When would it be appropriate to use a model instead of a controlled experiment
a
is the correct answer
There are several differences between chemical and physical changes. Which process is a sign of a chemical change? A. Rotting potato gives all of bad smell
B. Melting block of ice leaves a large puddle
C. A cloud quickly changes shape when blown by wind
D. A plaster statue breaks when it falls into the floor. PLEASE HELP
Answer:
A. a rotten potato gives all of bad smell
Explanation:
B,C,D are all physical changes because we can reverse them back.we can cool the water back to make ice. if the wind passes again we can randomly get the same cloud shape in c. and in d we can make that statue again. but in A can we reverse the rotting process ? ( the enzyme reaction) no we cant because it is a chemical reaction it gives a bad smell because of the chemical changes occuring in it.
hope this helps
Pls Help! one multiple-choice question for 13 points and brainliest!
Where does the energy from sunlight go in photosynthesis?
a) covalent bonds in carbon dioxide
b) covalent bonds in glucose
c) covalent bonds in oxygen
d) polar covalent bonds in water
Answer:
B
Explanation:
They use energy from sunlight to synthesise glucose from carbon dioxide and water.
This is a science question. What is the skateboarder’s acceleration?
Answer:
2.4
Explanation:
Divide 7.0 by 3.0 you get 2.333333 then round it of to 2.34
Select The on that most applys
Will mark brainliest
Answer:
A and b
Explanation:
Question 6 (1 point)
Sound, earthquakes, and waves in water are rechanical waves because they require
a physical to transport energy. (Lesson 4.02)
O electromagnetic field
O disturbance
O medium
location
Answer: The answer is MEDUIM
Explanation:
Determine the pressure of a 6.4L sample of oxygen gas at 300K and 100KPa, after the gas is compressed to 2.40L at 900K.
The pressure : 800 kPa
Further explanationBoyle's law and Gay Lussac's law
[tex]\tt \dfrac{P_1.V_1}{T_1}=\dfrac{P_2.V_2}{T_2}[/tex]
P1 = initial gas pressure (N/m² or Pa)
V1 = initial gas volume (m³)
P2 = gas end pressure
V2 = the final volume of gas
T1 = initial gas temperature (K)
T2 = gas end temperature
The pressure after the gas is compressed :
[tex]\tt \dfrac{100\times 6.4}{300}=\dfrac{P_2\times 2.4}{900}\\\\P_2=800~KPa[/tex]
14. Which of the following groups is most at risk for developing this disease?
a) children born to mothers with dark skin, living far from the equator
b) adults with dark skin who live close to the equator
c) children born to mothers with light skin who live close to the equator
Answer: c
Explanation: built different
*blank* carry blood away from the heart, while *blank* carry blood back to the heart.
fill in the blank spaces...
A. capillaries
B. arteries
C. Blood vessels
D. Veins
Answer:
i think its C im not so sure
Explanation:
nrjdkfkzhsugogo
I need help (yes again)
Answer:
with what?
Explanation:
please help ASAPPP
will mark brainliest!!!
The polyatomic ions are those ions which has more than two atoms involved such as the other options than OH^-1 in the question. The OH^-1 ion is the diatomic ion because it has only 2 atoms
______________________________________HOPE IT HELPS!What are the two parts of an atom ?
Answer:
The nucleus and the outer region.
Explanation:
Which molecule contains a triple bond?
A.N₂
B.F₂
C.O₂
D.I₂
Answer:
N2.
Explanation:
How many total atoms are in K2(H2AsO4)2
5
18
16
12
Answer:
18
Explanation:
go go evhdj kk nm go go go
If you wanted to change the polarity of hydrogen bromide (HBr) by substituting the bromine by a different atom. Which atom would increase the polarity of the molecule?
Answer:
Chlorine
Explanation:
The Polarity of an atom is characterized as the dipole to dipole intermolecular forces between the slightly positively-charged end of one molecule to the negative end of another or the same molecule. Thus, the 'chlorine' atom would help in enhancing the polarity of hydrogen bromide(HBr) with 3.16 electronegativity as we know, the electronegativity increases if we move upwards in the periodic table.
Explain how Earth is heated through radiation
Answer:
Radiation happens when heat moves as energy waves, called infrared waves, directly from its source to something else. This is how the heat from the Sun gets to Earth. In fact, all hot things radiate heat to cooler things. When the heat waves hits the cooler thing, they make the molecules of the cooler object speed up.
HELP! will mark brainliest if gotten right
Helppppp!!!! Please.....
If you triple the force on an object , the acceleration will
a
reduced by 1/3
b
double
c
tripled
d
halve
Answer:
C triple
Explanation:
please crown me
A
occurs when what the scientist expects changes how the results of an experiment are viewed?
A. conundrum
B. bias
C. impass
Answer:
conundrum
Explanation:
its not bias or impass
Water is the only substance that can dissolve polar solutes. True or False?
Answer:
false!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Explanation:
How much energy is required to raise the temperature of 0.2 kg of aluminum from 15°C to 18°C? (Refer to table of specific heat values.)
The amount of energy which is required to raise the temperature of 0.2 kg of aluminum from 15°C to 18°C is 49,545 J.
How do we calculate absorbed energy?Amount of energy absorbed by any material will be calculated by using the below equation:
Q = mcΔT, where
m = mass of aluminum = 0.2 kg
c = specific heat of aluminum = 897 J/kg.K
ΔT = change in temperature = 18 - 15 = 3°C = 276.15 K
On putting these value on the above equation, we get
Q = (0.2)(897)(276.17) = 49,544.89 = 49,545 J
Hence required amount of energy is 49,545 J.
To know more about energy absorbed, visit th below link:
https://brainly.com/question/19383299
#SPJ2
Copernicus challenged the way in which people of his time thought about the solar system. How did Copernicus describe the motion of the sun?
A.The sun is stationary.
B.The sun revolves around Earth.
C.The sun moves in an elliptical orbit.
D.The sun moves in a straight line through space.
Answer:
A. The sun is stationary and we rotate around it.
Hope This Helps!
Answer:
A
Explanation:
the sun is stationary
What is 210 kg - 38 kg rounded to the correct number of significant figures
Answer:
170kg
Explanation:
True or False Gases do have a definite shape and volume.
Answer:
false
Explanation:
Answer:
False
Explanation:
It is false as the particles of gases keep moving. They have very weak molecular bonds. They are so weak that they can move freely anywhere and in any direction. Even if you trap some gases and a closed bottle, they keep moving. We can't measure what the shape is or what the volume is. Therefore, it is false.
Hope this is helpful and mark it Brainliest if possible! Good Luck!!!
I need help ASAP ... please
Answer:
help with what?
Determine the mass of 2.86 mole Co(NH3)6Cl3
Answer:
765 g Co(NH₃)₆Cl₃
General Formulas and Concepts:
Reading the Periodic Table of ElementsExplanation:
Step 1: Define
2.86 mol Co(NH₃)₆Cl₃
Step 2: Define conversions
Molar Mass of Co - 58.93 g/mol
Molar Mass of N - 14.01 g/mol
Molar Mass of H - 1.01 g/mol
Molar Mass of Cl - 35.45 g/mol
Molar Mass of Co(NH₃)₆Cl₃ - 58.93 + 6(14.01) + 18(1.01) + 3(35.45) = 267.52 g/mol
Step 3: Dimensional Analysis
[tex]2.86 \ mol \ Co(NH_3)_6Cl_3(\frac{267.52 \ g \ Co(NH_3)_6Cl_3}{1 \ mol \ Co(NH_3)_6Cl_3} )[/tex] = 765.107 g Co(NH₃)₆Cl₃
mol Co(NH₃)₆Cl₃ and mol Co(NH₃)₆Cl₃ cancel outWe are left with grams (mass)Step 4: Simplify
We are given 3 sig figs. Follow sig fig rules.
765.107 g Co(NH₃)₆Cl₃ ≈ 765 g Co(NH₃)₆Cl₃
Why would farmers in the United States be especially concerned about a decrease in ground water?
Answer:
yes probably
Explanation:
the decrease would affect the plants growing in the ground cause there is no access water they can get
