Answer:
Ok So....
Explanation:
The condition in which a body covers equal distance in an equal interval of the time is known to be uniform velocity. if both its magnitude and direction do not change with time then it can be said that the body is at uniform velocity. Hope this helps!~ (Sorry if you get it wrong or I did-)
In which one of the following branches of natural science are properties of materials studied?
a.
Biology
b.
Chemistry
c.
Geology
d.
Astronomy
Answer:
chemistry
Explanation:
it is the study of structer, composition and change that matter undergoes
How many energy sublevels are in the second principal energy level?
2 sublevels
Level one has one sublevel – an s. Level 2 has 2 sublevels - s and p. Level 3 has 3 sublevels - s, p, and d. Level 4 has 4 sublevels - s, p, d, and f.
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Please help!
An astronaut orbits planet X in his spaceship. To remain in orbit at 675 km above the planet's center, he maintains a speed of 76 m/s. What is the
mass of planet X? Note: the constant of universal gravity (G) equals 6.674 X 10 ^-11 N m^2/kg^2.
A. 7.7 x 10^14 kg
B. 5.8 x 10^19 kg
C. 7.7 x 10^17 kg
D. 5.8 x 10^16 kg
Answer:
B. 5.8 × 10^19 kg
Explanation:
Write 2.0 x 10^-3 in standard notation
Answer:
= 3.456 × 1011
(scientific notation)
= 3.456e11
(scientific e notation)
= 345.6 × 109
(engineering notation)
(billion; prefix giga- (G))
= 345600000000
(real number)
Explanation:
i dont know if its math or something else so here are your answers:)
Answer:
0,002
Explanation:
Describe 1 way process or system that transfers heat by convection. Be specific in details
the correct electron-dot formula for a molecule of chlorine?
Answer:
Cl has 7 dots
if its Cl2; Cl-Cl it will contain 14 dots
Explanation:
The electron-dot formula of the chlorine molecule Cl₂is shown in the attached diagram below.
What is the lewis electron dot diagram?A lewis electron dot structure is used to represent the number of bonds, the bonding atoms, and the lone pairs left in the atoms in the molecule.
Lines are shown between atoms that are bonded to one another and excess electrons or lone pairs are represented as dot pairs and are placed next to the atoms.
As the valence electrons of each chlorine atom are equal to seven from the electronic configuration of the chlorine atom.
First, the total number of valence electrons in a chlorine molecule is 7 + 7 = 14.
As each chlorine atom needs only one electron to complete its octet. As the octet completes, the rest of the electrons are assigned as the lone pairs of atoms. Therefore, each chlorine atom has three lone pairs of electrons on it.
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If an object has a density of 0.2g/ml, will it sink or float in water?
Sink
Float
Answer:
float ...(i think)
Explanation:
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What does a cladogram show?
A. comparison of the relative ages of organisms
B. evolutionary relationships between organism
C. comparison of species that are most similar
D. ecological relationships between organisms
Answer:
B
Explanation:
I did this and got it correct.
Which group of organisms disappeared during the mass extinction at the end of the Cretaceous Period?
A. dinosaurs
B. mammoths
C. saber tooth cats
D. trilobites
Answer:
saber tooth cats
Explanation:
How many liters are in .0025 millililiters
Answer: 0.0000025 liters
The relationship between Fahrenheit and Celsius is as follows: °F = °C * 1.8 + 32 If the weather forecaster says it will be 14 °F, what is that in Celsius?
Answer:
The answer is "-10° C".
Explanation:
Fahrenheit and Celsius, both use scales for measuring their temperature standard. The Fahrenheit suggests, as just a cold water point by taking 32° F and hot water rate by taking 212° F. The freezing temperature of both the water at the Celsius scale is 0° C, as well as the boiling point of its water at 100° C.
Converting the Fahrenheit to Celsius:
Formula: [tex]\bold{^{\circ}F = ^{\circ}C \times 1.8 + 32}[/tex]
°F= 14
[tex]\to 14 = ^{\circ}C \times 1.8 + 32}\\\\\to 14 -32 = ^{\circ}C \times 1.8 \\\\\to -18 = ^{\circ}C \times 1.8 \\\\\to ^{\circ}C = \frac{-18}{1.8} \\\\\to ^{\circ}C = \frac{-180}{18} \\\\\to ^{\circ}C = - 10[/tex]
When water changes into water vapor, this is called
a. condensation
b. transpiration
c. precipitation
d. evaporation
is the kinetic energy due to the random motion of particles in an object
Answer:
You are correct however there is also potential energy because the energy is released over a period of time.
Hope this helps!
if the Earth can fit 1000
billion people, why is the
human carrying capacity
likely only between 10-15
billion?
Answer:
because people are not having babies fast enough
Explanation:
The ___ is the number of protons in the nucleus of an atom of an element.
Fill in the blank.
What is the energy of a microwave photon that has a frequency of 9.86 x 1012 Hz?
Answer:
E = 65.37×10⁻²² J
Explanation:
Given data:
Energy of photon = ?
Frequency of photon = 9.86×10¹² Hz
Solution:
Formula:
E = h.f
Here h is planck's constant its value is 6.63×10⁻³⁴ js.
E = 6.63×10⁻³⁴ js × 9.86×10¹² Hz
Hz = s⁻¹
E = 65.37×10⁻²² J
The energy of photon is 65.37×10⁻²² J.
Be sure to answer all parts. Show the overall reaction for formation of racemic 3−bromohexane from (E)−3−hexene by entering the structures of the products and reactants in the template provided. Part 1 out of 3 draw structure ... arr draw structure ... + draw structure ... (E)−3−hexene (S)−3−bromohexane (R)−3−bromohexane Racemic product = 50% (S) and 50% (R)
Answer:
See explanation
Explanation:
The mechanism for the formation of bromohexane from hexene has been clearly shown in the image attached to this answer.
Hexene is attacked by HBr and a carbocation is first formed as shown. The carbocation is flat and planar. it can be attacked on either face by the bromide ion.
Attack on either faces yields a racemic mixture of the R and S enantiomer as shown in the image.
You can use the mechanism shown to fill in the structures.
i need a person i can love and not get hurt
Answer:
You'll find someone. There's a someone for everyone.
Explanation:
And I know how you feel.
When sugar is dissolved in hot tea, physical changes occur. Write two physical properties of sugar
that change when dissolved in hot tea.
Answer:
When you mix the sugar into the tea and stir, it dissolves so you can't see it. Also when you stir the sugar into the tea the taste changes and it turns sweeter.
The physical property of sugar that changes is that the the sugar is dissolving as well as the molecules will get further apart from each other and will give a sweet taste.
What is physical change?A physical change is characterized by a shift in the physical properties. Melting, transformation to a gas, change in resilience, change in durability, changes in crystal form, textural alter, shape, size, color, volume, and density are all illustrations of physical properties.
The physical characteristics of a substance include its shape, size, color, and state.
A physical change takes place when a substance experiences a shift in its physical properties. Physical changes are usually reversible. There is no new substance formed as a result of such a change.
The parameter of sugar that changes is that it dissolves, and the molecules get further apart from each other, producing a sweet taste.
Thus, the two physical properties of sugar that change when dissolved in hot tea is breaking down of its crystal structure as well as giving sweetness.
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Which model of the atom was used as a result of JJ Thomson's cathode ray
experiments?
a. Plum pudding model
b. Nuclear model
C. Planetary model
d. Quantum mechanical model
Answer:
a. Plum pudding model
Explanation:
The plum pudding model of the atom was proposed by J.J. Thomson. It was the model he derived from his experiment on the gas discharge tube.
J.J Thomson was the first person to discover electrons which he called cathode rays because in the discharge tube, they emanate from the cathode.
This led him to suggest the plum pudding model of the atom. The model reflects electrons being surrounded by a volume of negative charges.Explain what lattice energy is and how it affects
the properties of ionic compounds. Describe the
general properties of ionic compounds.
Answer:
Explanation:
Lattice energy is a way to measure the bond strength in ionic compounds. Ionic compounds tend to have high melting and boiling points. Ionic compounds tend to be hard. Ionic compounds have a range of solubilities.
Which is NOT an example of an inclined plane?
Question 4 options:
A See-Saw
A screw
A slide
A ramp
Answer:
A. See-Saw
Explanation:
A see-saw is not an inclined plane but it is a lever.
A screw, ramp and a slide are all inclined planes
Simple machines help to make doing work easier. They simply help to amplify effort.
There are different types of simple machines;
the wheel and axle, the lever, the inclined plane, the pulley,d the screw, and the wedge.An inclined plane is a simple machine made up of a plane fixed at one end and then tilted at the other.
A steel cylinder for scuba diving contains 11.1 L of compressed air. The pressure inside the cylinder is
204 atm at a temperature of 24°C.
Calculate the number of moles of air in the cylinder.
Write your answer using three significant figures.
mol air
Answer:
9.28moles
Explanation:
Given parameters:
volume = 11.1L
pressure = 204atm
temperature = 24°C = 24 + 273 = 297K
Unknown:
Number of moles of air in the cylinder = ?
Solution:
To solve this problem, we apply the ideal gas equation;
PV = nRT
P is the pressure
V is the volume
n is the number of moles
R is the gas constant = 0.082atmdm³mol⁻¹K⁻¹
T is the temperature
Now insert the parameters and find n;
204 x 11.1 = n x 0.082 x 297
226.4 = 24.4n
n = 9.28moles
The number of moles of air in the cylinder is 92.98 moles
From the following parameters given, we are to determine the number of moles of air in the cylinder.
Given that:
The volume of the steel cylinder = 11.1 LThe pressure inside the cylinder = 204 atmThe temperature inside the cylinder = 24°CThe number of moles of air can be determined by using the relation for the ideal gas equation which can be expressed as:
PV = nRTwhere
n = number of molesMaking (n) the subject of the formula:
[tex]\mathbf{n = \dfrac{PV}{RT}}[/tex]
[tex]\mathbf{n = \dfrac{204 \ atm \times 11.1 L}{0.082 \ L .atm/mol .K \times 297 \ K}}[/tex]
n = 92.98 moles
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Think about some of the friends in your life, and ask yourself why you became friends.
Think about one friendship, in particular, that might be a good example of at least two of these factors in friendship: mere exposure effect, similarity, reciprocal liking, and utilitarian value. Explain why this friendship is a good example of these two factors.
this is in psychology
please answer the question correctly.
Answer:
i became freinds with (friends name) because he liked me for me and he did not make fun of me when i did something inbarrasing at school he always made me lough to.
Explanation:
A 15.0 L tank of gas contained at a high pressure of 8.20 • 10^4 torr. The tank is opened and the gas expands into an empty chamber with a volume of 600•10^4 L. Calculate the new pressure of the gas
Answer:
P₂ = 0.205torr
Explanation:
Boyle's law relates the pressure and volume of a gas under two different conditions. The equation is:
P₁V₁ = P₂V₂
Where P is pressure and V volume of of 1, initial conditions and 2, final conditions.
P₂ is our incognite
Replacing:
P₁V₁ = P₂V₂
8.20x10⁴torr*15.0L = P₂*600x10⁴L
P₂ = 0.205torr
Which of the following is an electrolytic cell?
A. Silver (Ag) oxidized, gold (Au) reduced
B. Lithium (Li) oxidized, zinc (Zn) reduced
C. Aluminum (Al) oxidized, zinc (Zn) reduced
D. Iron(II) (Fe) oxidized, aluminum (AI) reduced
Iron (II) (Fe) oxidized, aluminium (Al) reduced. Hence, option D is correct.
What is an electrolytic cell?An electrolytic cell converts electrical energy into chemical energy or vice versa.
Oxidation-reduction reactions are balanced by two half overall chemical equations into an oxidation equation and a reduction equation.
Iron (II) (Fe) oxidized, aluminium (Al) reduced of the following is an electrolytic cell.
Hence, option D is correct.
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Rank the following items from LEAST to MOST momentum.
Fast car, Parked truck, Slow car, Fast baseball, Fast feather.
Answer:
This if from lowest to highest
Parked truckSlow car (depending on its actual speed)Fast feather (depending on how its falling)Fast baseballFast car (depends on it's mph)Balance these chem problems
1) KClO3 → KCl + O2
2) Al + O2 → Al2O3
3) Al + HCl → AlCl3 + H2
4) C8H20 + O2 → CO2 + H2O
5) ZnBr3 + CaO → Zn2O3 + CaBr2
6) Ca3N2 + K K3N + Ca
7) Fe2(CrO4)3 + Pb(NO3)4 → Fe(NO3)3 + Pb(CrO4)2
8) Fe + O2 → Fe2O3
9) C6H12O6 → C + H2O
10) C4H12 + O2 → CO2 + H2O
11) Fe2O3 → Fe + O2
12) C7H6O + O2 → CO2 + H2O
13) Cu3(PO4)2 + AuCl → Au3PO4 + CuCl2
14) SO2 + O2 → SO3
15) H2 + O2 → H2O
16) NH4OH → NH3 + H2O
17) H3PO4 → P2O5 + H2O
18) AgNO3 + Fe2S3 → Fe(NO3)3 + Ag2S
19) Cu + AuCl → Au + CuCl2
*20) C55H104O6 + O2 → CO2 + H2O
Kobe Bryant was recorded to have thrown a basketball 10m in 0.75 seconds. What was the ball’s speed
rip kobe Bryant rip 24
Answer:
Rip :(((
Explanation:
Im so sorry for not answering but rip kobe :(
please help!! i don’t know what the heck im doing lol
Answer:
I can help you know how to mark the points.
For the first one point, if you look at the lines that go side to side, you need to find the line that is 20 degrees that's above the blue line. Next, if you look at the lines that go up and down, you need to find the line that is 30 degrees, but is to the right of the blue line. When you plot your point, it should somewhere along the coastline of Saudi Arabia.
For the second point, if you look at the lines that go side to side, you need to find the line that's 40 degrees that's below the blue line. Next, if you look at the lines that go up and down, you need to find the line that is 10 degrees that's to the left of the blue line. When you plot your point, it should be located somewhere in the South Atlantic Ocean.
For the third point, if you look at the lines that go side to side, you need to find the line that's 20 degrees that's below the blue line. Next, if you look at the lines that go up and down, you need to find the line that's 40 degrees that's to the right of the blue line. When you plot your point, it should be kind of located in the Indian Ocean, but not too far from Africa.
(Not too sure how accurate the instructions were, I haven't done longitude and latitude lines in a while)
Explanation:
Picture: