Answer:
1mole of Argon contains 6.022x10^23atoms
3moles will contain
3x6.022x10^23atoms
1 atoms of Argon contains 18electrons
3x6.022x10^23atoms will contain...
3x6.022x10^23 x 18electrons
= 3.252x10^25electrons
Note:In a Neutral Argon... No of Electrons and Protons(positive charge) are the same
From Charge Quantization Principle
Q=ne
n=3.252x10^25protons
e=1.6x10^-19C
Q=3.252x10^25 x 1.6x10^-19
Q=5.2x10^6C
llus
A block is on a surface with
μς
0.325. It takes 4.11 N to
break it free from static friction.
How much normal force acts
on the block?
(Unit = N)
Enter
Answer: 12.6 newtons
Explanation:
Take the equation, static force equals static friction times normal force. ( F = μn )
Divide both sides by static friction so normal force is the answer.
( F / μ = n )
Insert your numbers (4.11 F and 0.325 μ) into the equation to get your answer.
( 4.11 / 0.325 = n )
n = 12.6
My first time helping someone and future people on this site. This is the answer I put in and got right.
ACELLUS GANG STAND UP!
A mass of .1539 kg moves down a 5 meter ramp in 2 seconds. What
is the velocity and the KE developed by the moving mass
Answer:
Velocity=2.5m/s
KE=4809.375J
Explanation:
Velocity=5m/2s=2.5m/s
KE=½×1539kg×(2.5m/s)²
KE=4809.375J
An object, experiencing no friction, keeps moving at a constant speed. What can we say about the net force on the object?
a) the net force keeping the object going is the same as the force that would be required to stop it
b)the net force is in the same direction as the object's velocity
c)the object is not changing its speed but its velocity might be changing in Direction so if there is a net force it is that right angles to the velocity
d)since the object has no acceleration there is no net force
e)the net force is equal to the weight of the object
Answer:
Explanation:
Let's look at a mathematical representation of this. The equation for tis is just a souped up version of Newton's 2nd Law:
F - f = ma. It an object is moving at a constant speed, the acceleration of that object is 0. That changes this equation to
F = f which states that the applied Force equals the frictional force, choice a.
Which of the statements below describes how a motor operates
Answer:
need Read this excerpt from "Not a Dove, But No Longer a Hawk."
Despite these misgivings, I do not see how we can do anything but continue to prosecute the war. We can and should limit the violence and the suffering being inflicted on the civilians as much as possible, but for whatever reasons, successive Administrations in Washington have carried the commitment in Vietnam to the point where it would be very difficult to prevent any precipitate retreat from degenerating into a rout. If the United States were to disengage from Vietnam under adverse conditions, I believe that the resulting political and psychological shockwaves might undermine our entire position in Southeast Asia.
Which statement best describes the paradox in this excerpt?
The author acknowledges that civilians should not suffer, but states that the civilians must retreat.
The author suggests that the administrators in Washington are busy making policies while overlooking the need to end the war.
The author acknowledges that the violence should stop, but admits that a retreat might have dire consequences.
The author suggests that the Vietnamese people are counting on US support, though their political ideals are not democratic.
Explanation:
If two proton approach each other with speed of 400m\s and 450m\s respectively what is the total momentum of the two particle system
Answer: [tex]83.65\times 10^{-27}\ kg.m/s[/tex]
Explanation:
Given
The velocities of the protons are 400 m/s and 450 m/s
Mass of the Proton is [tex]m=1.673\times 10^{-27}\ kg[/tex]
Since they travel in the opposite direction, therefore, their momentum cancels out each other.
Momentum is the product of mass and velocity
[tex]\therefore m(450-400)\\\Rightarrow 1.673\times 10^{-27}\times 50\\\Rightarrow 83.65\times 10^{-27}\ kg.m/s[/tex]
The direction of momentum is in the direction of proton having 450 m/s velocity.
A cyclist applies the brakes on her bicycle with a force of -75.0 N. As a result,
the bicycle comes to rest after traveling 11.0 m with the brakes applied. How
much work is done by the brakes?
A. -75.0 N
B. 825 J
C. -825 J
D. 6.82 N.m

A clock draws 2.0 watts of power to operate and is in operation 8,600 hours per year. The energy usage of the clock, in kWh per year, is closest to
Answer:
the energy usage of the clock per year is 17.2 kWh
Explanation:
Given;
power drawn by the clock, P = 2 W
duration of the clock's operation, t = 8,600 hours per year
The energy usage of the clock per year is calculated as;
E = Pt
[tex]E = (\frac{2}{1000} )kW \ \times \ 8,600 \ hr\\\\E = 17.2 \ kWh[/tex]
Therefore, the energy usage of the clock per year is 17.2 kWh
h2+o2 - h2o mass
Please help
H2O2 H2O
H2 + O2 → H2O. Word equation: Hydrogen gas + Oxygen gas → water. Type of Chemical Reaction: For this reaction we have a Combination reaction. Balancing Strategies: For this reaction it is helpful to start by changing the coefficient in front of H2O and so that you have an even number of oxygen atoms.
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What happens when you burn a piece of wood in a campfire?
Energy is released due to friction.
Solar energy is released.
Nuclear energy is released.
Chemical energy is released.
Answer:
In the case of burning wood, stored potential energy (in the form of chemical energy) in the log is released due to heating by other excited atoms. This chemical reaction is called combustion and requires oxygen. Combustion changes the potential chemical energy into kinetic energy in the form of heat
Explanation:
thank me later
6. A woman weighs 650 N and wears high heels with a
total area of 52 cm2. What is the pressure on the floor?
Answer:
12.5
Explanation:
Pressure: Force/Area = 650/52
=12.5
Rebecca forgets to title her notes in her physics
class. These are the notes she takes:
Which title would be the best choice for Rebecca's
notes?
-Special signals that help them be seen in the body
-Used in
-CAT scans
-radioactive tracers
-Help create better images inside the body
Uses of Nanotechnology: Carbon Wires
O Uses of Nanotechnology: Quantum Dots
O Quantum Mechanics: Carbon Wires
O Quantum Mechanics: Quantum Dots
Answer:
use of nanotechnology ; quantum dots
Explanation:
edg 2021
Answer:
Explanation:
The notes are about using Quantum Dots for bio-medical imagining. The notes are more on its uses than its theory. So the title should be O Uses of Nanotechnology: Quantum Dots.
what are the steps to form a igneous rock
Answer:
igneous rocks are formed through the cooling and solidification of magma or lava. As hot, molten rock rises to the surface, it undergoes changes in temperature and pressure that cause it to cool, solidify, and crystallize.
what's the main function for the human digested system
Answer:
The function of the digestive system is digestion and absorption. Digestion is the breakdown of food into small molecules, which are then absorbed into the body.
Explanation:I hope it helped
What distance would an object need to be located in front of a converging lens for
the image to be the same size as the object?
Closer than F
Between F and 2F
Beyond 2F
At 2F
Answer:
2*F
Explanation:
If we put an object of a given size exactly at a distance 2*F from the lens, the virtual image (the image generated by the lens) will be generated at a distance 2*F from the lens and the size will be equal to the size of the real object (but the image will be inverted)
Now let's do the math.
The relation between the distance of the object to the lens O, and the distance between the image and the lens I is:
1/O + 1/I = 1/F
solving for O, we get:
1/O = 1/F - 1/I = (I - F)/(F*I)
O = F*I/(I - F)
Such that the relation between the height of the original object, H and the height of the virtual image H' is:
H/H' = -I/O
Replacing by O we get:
H/H' = -I/(F*I/(I - F))
If the sizes are equal, then H/H' = - 1 (remember that the image is inverted, thus the sign)
-1 = -I/(F*I/(I - F))
F*I/(I - F) = I
F*I = (I - F)*I
F = (I - F)
F + F = I = 2*F
The distance between the image and the lens is 2*F
O = F*I/(I - F) = F*2*F/(2*F - F) = 2*F
The object is at a distance 2*F from the lens.
A 100 kg cyclist travels at 4.5 m/s. A 50 kg gorilla is dropped straight down onto her. What is the new speed of the system?
Mass of cyclist = 100 kg
Mass of gorilla = 50 kg
Initial speed = 4.5 m/s
Let Final speed = s
100 x 4.5 = (100 + 50) x s
450 = 150s
S = 450/150
S = 3
The new speed is 3m/s
Helppp pleaseeeeeeee. NO LINKS. HELP HELP HELP
Answer:
Choice A
Explanation:
The lower the point the higher the kinetic energy because Mechanical energy is conserved and the Gravitational Potential Energy gets lower when the height is lower
Light is created by the motion of charged particles.
O True
O False
Answer:
true
Explanation:
A laser beam travels from a telescope on Earth to a Moon and then back to the Based on this information , how far is the Moon Earth? PLEASE HELP?
A. 384,000,000
B. 58.600, 000m;
C. 1, 536, 000, 000m
D. 117, 000, 000m
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How do molecules at warm temperatures differ from molecules at cool temperatures?
At warm temperatures, molecules move around more.
At warm temperatures, molecules grow in size.
At warm temperatures, molecules combine with each other more easily.
At warm temperatures, molecules exchange electrons more easily.
You push a bike pedal 10cm and the bike moves 100cm. Calculate the Speed ratio ( show all work ) ( use the formula and divide the input distance by the output distance)
Answer:
when you are pushing the pedal you are causing the pedal to move done and then you will move 100cm
Explanation:
10 cm= 100 cm moved so when you move you will move because you are timeing the 10 by 100 to get the spped
In the center of the Milky Way galaxy is a
A
Answer:
a super massive blackhole
What is the net force in the following diagram?
The edge effect in habitats are caused by:
A. habitat fragmentation
B. biological magnification
C. eutrophication
D. destruction of habitat
The edge effect in habitats is caused by habitat fragmentation. Therefore, option A is correct.
Habitat fragmentation refers to the process by which large, continuous habitats are divided into smaller, isolated fragments due to human activities or natural events. It occurs when natural landscapes are altered or disrupted. It results in the fragmentation of once-continuous habitats into smaller patches.
This fragmentation can happen through various means, such as the construction of roads, urban development, agriculture, deforestation, or natural events like wildfires or floods.
Learn more about habitat fragmentation, here:
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Which change corrects the error in his steps?
Charlie writes the steps shown to describe the use
of a transistor in a closed circuit with flowing current.
Using a Transistor to Amplify a Signal
1. Current (1) flows from the base to the emitter.
2. An input causes a small increase in voltage
across the base and emitter.
3. Ji increases a small amount.
4. Current (12) flowing from the emitter to the
collector changes a large amount.
O Change the title to "Using a Transistor as a
Switch."
O Change step 1 to say that no current flows in the
transistor at the start.
O Reverse the sizes of the changes in current in
steps 3 and 4.
O Reverse the direction of current in step 4.
Answer:
answer is D
Explanation:
took test and got 100%
The change that corrects the error in his steps is reverse the direction of current in step 4.
What is amplifier?An amplifier, is an electronic device that can be used to increase output power.
Observed steps in using a transistor to Amplify a SignalCurrent (1) flows from the base to the emitter. An input causes a small increase in voltage across the base and emitter. Ji increases a small amount.Current (2) flowing from the emitter to the collector changes a large amount.Thus, the change that corrects the error in his steps is reverse the direction of current in step 4.
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______ is a chemical reaction between an acid and a base that forms a salt and water. Group of answer choices Neutralization Dissociation Titration Ionization
Answer:
neutralization
Explanation:
this is because
acid + base ---> salt + water
Which of the following is characteristic of the elements in a pattern?
a. related
b. neutral
c. isolated
d. discrete
Answer:
related
Explanation: got it right on test
The answer is:
related(i think)
To understand the photoelectric effect physiciests should view light as having what type of properties?
Answer:
Particle
Explanation:
To understand photoelectric effect the physicists has to view light as a particle and not wave. The wave nature of the light could not explain the phenomenon of photoelectric effect.
Photoelectric effect is emission of electrons from a material when electromagnetic radiation(Light) is incident on it. These emitted electrons are called photoelectrons.
The explain this effect Einstein proposed that beam of light is can not be a wave propagating through space, but a swarm of discrete energy packets, called as photons.
Astronomers categorize galaxies into a handful of basic shapes. What can you conclude from this fact?
From the that astronomers categorize galaxies into a handful of basic shapes, it can be concluded that the all galaxies are made from the same forces.
Astronomers have categorized galaxies into three main categories,
Elliptical Galaxies:
These galaxies have smooth ellipsoidal shape. They are most abundant type. For example- Messier 49
Spiral galaxies:
These galaxies have a spiral shapes with many hand like structures. For example- Milky way.
Irregular Galaxies:
They do not have any specific shape.
Therefore, from the that astronomers categorize galaxies into a handful of basic shapes, it can be concluded that the all galaxies are made from the same forces.
To know more about Galaxies,
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Have All existing elements have been discovered
Answer:
Not not all of the elements have been discovered.
When stopping at a stop sign where there is no crosswalk or stop line, a driver should stop his/her vehicle: A Before the back of the vehicle enters the intersection. B Before the front of the vehicle enters the intersection. C When the front of the vehicle is even with the stop sign. D Before the front of the vehicle is even with the stop sign
Answer:
Before the front of the vehicle enters the intersection.
Explanation:
When stopping at a stop sign where there is no crosswalk or stop line, a driver should stop his/her vehicle before the front of the vehicle enters the intersection.
The front part of the vehicle comes in contact initially. On the other hand, the back part comes after that.
Hence, the correct option is (b).
