Answers
False. E=hf, where h is Planck's constant, c is the speed of light, f is the frequency, and is the wavelength; and E=hc/, where E is directly proportional to frequency and inversely proportional to wavelength.
The inverse relationship between a photon's energy and what?With respect to the wavelength of the radiation, photon energy is inversely proportional.
What is a photon's wavelength-related energy?Two formulas can be used to determine a photon's energy: E = h f is a formula that can be used if the photon's frequency is known. This equation, sometimes known as Planck's equation, was created by Max Planck.
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Related Questions
The table shows the outputs, y, for different inputs, x:Input(x)371115Output(y)46810Part A: Do the data in this table represent a function? Justify your answer. (3 points)Part B: Compare the data in the table with the relation f(x) = 5x − 21. Which relation has a greater value when x = 11? (2 points)Part C: Using the relation in Part B, what is the value of x if f(x) = 99? (5 points)(10 points)
Answers
Answers:
A. It is a function
B. f(x) = 5x - 21 has a greater value when x = 11
C. x = 24
Explanation:
Part A.
A relation is a function if each value of the input is related to only one value of the output. In this case, the input doesn't have repeated values, so the table represents a function.
Part B.
In the table, when x = 11, y = 8
On the other hand, when x = 11, f(x) = 5x - 21 is equal to
f(x) = 5x - 21
f(11) = 5(11) - 21
f(11) = 55 - 21
f(11) = 34
Then, f(x) = 5x - 21 has a greater value when x = 11 because 34 is greater than 8.
Part C.
To find the value of x when f(x) = 99, we need to solve the following equation:
f(x) = 5x - 21
99 = 5x - 21
Solving for x, we get
99 + 21 = 5x - 21 + 21
120 = 5x
120/5 = 5x/5
24 = x
So, if f(x) = 99, x = 24
When a wire is heated, the current goes down from 0.3A to 0.26A. State how the resistance of the wire has changed
Answers
It's very wonderful to help you today!
Answer:
The resistance of the wire after being heated is approximately 1.15 times the resistance before being heated.
Explanation:
The resistance of the wire goes up as the temperature goes up.
By Ohm's law, we have the relationship between the resistance of a conductor R, the current flowing through it, I, and the voltage across it, V,
\(V=R~x~I\)
As described, the current through the wire decreases so, to maintain the same voltage, the resistance must increase when the wire is heated. Let's say R1 is the resistance before heating the wire and R2 is the resistance after,
\(V=R_{1} x~I_{1} =R_{2}~} x~I_{2}\)
Let's solve for R2,
\(R_{2} =\frac{I_{1} }{I_{2} }~x~R_{1}\)
In this case, I1 = 0.3A and I2 = 0.26A,
\(R_{2} =\frac{0.3A}{0.26A} ~x~R_{1} =1.15R_{1}\)
Hence, the resistance of the wire after being heated is approximately 1.15 times the resistance before being heated.
How do atomic and molecular interactions explano the properties of matter that we see and feel?
Answers
Answer:
The atomic and molecular interactions unveil the bulk properties of matter in our environment by ways of the fact that everything in the whole universe is made of either atoms, molecules or even ions
How matter is made up of atoms and molecules?
It has been proven practically everything in the whole universe is matter and everything which interact with matter is also matter. This explains to us the reasons why matter could be atoms, molecules or ions.
That being said, some substances (matter) is made up of atoms of elements, some made up of molecules or atoms and molecules and others ions or both. However, matter is anything which has mass and occupies space.
In conclusion, we can now conclude from the explanation above that the properties of matter are as a result of the interaction which exists between matter at the atomic and molecular level.
Three different scientific institutions provide data about how much the annual global temperature has deviated from the norm in the years 1880 to 2014. The nort is
based on the temperatures of a base period, from 1951 to 1980
Institution A's data show that the annual global temperature deviated from the norm by 0.75°C in 2010
Institution B's data show that the annual global temperature deviated from the norm by 0.72°C in 2010
Institution C's data show that the annual global temperature deviated from the norm by 0.77°C in 2010.
Which are accurate statements about this data? Select the two correct answers
(1 point)
Answers
Based on the findings above, the accurate statements are:
B. The institutions have not yet gathered enough data for scientists to draw a conclusion about whether the annual global temperature is gradually increasing.C. The data gathered by each institution is very similar to the data gathered by the other institutions.What are the accurate statements?The information that all three institutions gathered is quite similar with their results showing a range of annual temperature deviation of 0.05°C in 2010.
However, this data is not enough to say that temperatures are rising gradually because there is no information on temperatures from the previous years.
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Imagine that a single cell below goes through four cell divisions.
How many cells are produced? To find out, draw the parent cell
and cells present after each division. Then write the number of
cells in the space below each drawing. (Hint: the number of cells
doubles with each division.)
Answers
Two, four, eight and sixteen cells are produced from first, second, third and fourth cell division respectively.
How many cells are produced?When the body cell passes through cell division process, it divides into two daughter cells. In the second cell division, two cells divides into four cells. In the third cell division, the four cells divides into eight cells. In the fourth cell division, the eight cells divides and sixteen cells are produced.
So we can conclude that two, four, eight and sixteen cells are produced from first, second, third and fourth cell division respectively.
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Which of the following statements is true? A. Both warming up and cooling down or important. B. It is more important warm up then it is to cool down. C. Is more important to cool down then is to warm up. D. Both warming up and cooling down are not important
Answers
Answer:
No. A is correct because both warming up and cooling down are important
Both warming up and cooling down are important.
This is based on aerobics and human body balance regulation as regards exercising.
Warming up and cooling down in exercising are just based on the level of intensity at which the exercise is carried out.
Now, warming up when exercising involves activities like jogging. Warming up is a very vital part of exercising as it helps to get a person's cardiovascular system ready for the subsequent exercises and physical activities to be engaged. This will help in making sure there is enough blood flowinh to your muscles as well as increasing your body temperature.In another sense, cooling down is also very vital in activity because after the blood pressure and heart rates have been raised after exercising, they will need to be restored to their normal levels at which they were before commencement of the exercise. It also helps to regulate the blood flow.Thus, Both warming up and cooling down are important.
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Larry the Rock was lonely for multiple years. The inertia that Larry possessed intimated those who walked past by it, therefore people never moved Larry.
Larry constantly watched people and cars accelerate past him but sadly he has never had the opportunity to experience acceleration.
But one day, David decides to let Larry experience acceleration and tried to push him. His friend Pancho heard about this and decided to help out. But
because Pancho was not listening in Physics class, he was pushing Larry from the opposite side of David with an equal amount of force and Larry was sad
he still did not get to move.
What type of Equilibrium is Larry going through?
O Static Equilibrium
O Kinetic Equilibrium
O Dynamic Equilibrium
O Geo Equilibrium
O Francesca Equilibrium
Answers
First option is correct.Larry the Rock is going through Static Equilibrium.
In this situation, Larry is at rest and remains stationary despite the forces acting on him. While David and Pancho are exerting equal forces from opposite sides, their forces cancel each other out, resulting in a net force of zero. As a result, Larry does not move or experience any acceleration.
Static equilibrium occurs when an object's forces and torques balance each other, leading to a stable, balanced state. In this case, the forces exerted by David and Pancho are equal in magnitude and opposite in direction, creating a condition where the resultant force is zero. As a result, Larry remains in a state of rest, unable to experience any movement or acceleration.Therefore, the type of equilibrium that Larry the Rock is going through is Static Equilibrium.
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No work is done by an object at rest because.
1) no force is acting on the object.
2) no distance is moved.
3) heat is not produced.
4) friction is acting on the object
Answers
Answer:
no distance is moved as w=f×d
Place a fluid inside a sealed cylindrical container, then allow it to roll down an inclined plane under the influence of gravity five times. What do you think will happen to the speed of the container as you increase the temperature of the fluid by 10 degrees Fahrenheit each time?
Answers
The speed of the cylindrical container will increase as you increase the temperature of the fluid.
What is the speed of an object down inclined plane?
The speed of an object moving down an inclined plane is determined by applying Newton's second law of motion.
F(net) = ma
where;
F(net) is the net force on the objectm is the mass of the objecta is the acceleration of the objectThe net force on the object is determined by subtracting force of friction from the applied force and it is given as;
F(net) = F - Ff
F(net) = F - μmg
where;
μ is the coefficient of frictionm is the mass of the sealed cylindrical containerg is the acceleration due to gravityWhen the temperature of the fluid inside the sealed cylindrical container increases, the container becomes more light because the fluid will acquire more kinetic energy and kinetic frictional force resisting the motion of the container reduces and consequently the speed of the cylindrical container will increase.
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Marie observed people at a store. Which is a qualifier observation she may have made ?
Answers
Complete question is;
Marie observed people at a store. Which is a qualitative observation she may have made?
A. Twenty people walked into the store.
B. The store sells clothes.
C. It was 1:00 P.M.
D. all of the above
Answer:
Option B:The store sells clothes.
Explanation:
We want to find the one that is a qualitative observation;
Looking at the options;
A. Twenty people walked into the store. This denotes a quantitative measure because of the number 20.
B. The store sells clothes. This denotes a qualitative measure because it describes what she sells.
C. This is a quantitative measure because it deals with time of 1 pm which is quantitative.
Therefore, the correct answer is Option B
Please help i will give brainliest!!!!
In thinking about the uniform distribution of a gravitational field over a sphere, why does gravitational force have an inverse-square relationship with the distance between objects?
because the volume of a sphere is proportional to its radius
because the surface area of a sphere is proportional to the square of its radius
because the volume of a sphere is proportional to the square of its radius
because the surface area of a sphere is proportional to its radius
What happens to the gravitational force between two objects if the distance between them triples?
The force increases by a factor of 9.
The force increases by a factor of 3.
The force decreases by a factor of 9.
The force decreases by a factor of 3.
What must be the units for the gravitational constant G in order for gravitational force to have units of newtons?
m3/(kg⋅s)
m3/(kg⋅s2)
m3/(kg2⋅s)
m3/(kg2⋅s2)
Answers
the first one is: it's increased by a factor of 9
the second one: is m3/(kg*s^2)
by what factor does gravitational force between two objects increase if one double in mass and the distance between them decreases by half?: 8
what happens to the gravitational force between two objects that are 15 m apart, when one of them moves 3 m closer?: it increases by a factor of 1 9/16
in thinking about the uniform distribution of a gravitational filed over a sphere, why does the gravitational force have an inverse-square relationship with the distance between objects?: because the surface area of a sphere is proportional to the square if the radius
All these questions are correct I just took the quiz. Hope this helps you and others!
Answer:
1. The force decreases by a factor of 9.
2. 8
3. (N ⋅ m^2) / kg^2
4. It increases by a factor of 1 9/16
5. because the surface area of a sphere is proportional to the square of its radius
Explanation:
if the dissipated power between a and b equal 210 watt then VB equal
Answers
Answer:
correct answer is A
Explanation:
The diagram shows a series circuit with three resistors and two power sources.
In a series circuit the current through the entire circuit is constant and the resistance is the sum of the resistances in the circuit.
When the power sources are placed in opposite position the voltage between them is subtracted.
V_b - 30 = I (10 + 4 + 6)
V_b = I (20) - 30
V_b = 30 - 2 20
V_b = 10 V
the correct answer is A
You put your book on the bus seat next to you. When the bus stops suddenly the book slides forward off the seat. Why?
A.) The book received a push from the seat hitting it.
B.) The force applied by the bus caused it to accelerate forward.
C.) The book's inertia carried it forward.
D.) The book could never slide forward to begin with.
Answers
Answer:
C) The book's inertia carried it forward.
When the bus stops suddenly, the book tends to remain in motion due to its inertia. The book was at rest on the seat of the bus, and when the bus stopped suddenly, the book continued moving forward with the same speed and direction it had before the bus stopped. As a result, the book slid off the seat and onto the floor.
Explain String Theory
Answers
Answer:
String theory is an idea that reality is made up of an infinite amount of vibrating strings which are even smaller than quarks. In other words, it's a theory that states that particle physics are replaced with one-dimensional strings. It also describes how the strings spread out and interact with each other.
Explanation:
A crane lifts 4 bricks per minute through a height of 1.5m. Find the power that is expected if each brick weighs 100N
A. 2.5w
B. 10.0w
C. 150.0w
D. 600.0w
Answers
1. Fenway Park's small dimensions and the Green Monster have what overall effect on baseball statistics?
Answers
5. A man has a weight of 100 Newtons. How much work is done if he climbs 4 meters up a ladder? Plug numbers under the equation. Solve and circle your answer. Include the proper units.
Answers
Answer:
400 JExplanation:
The work done by an object can be found by using the formula
workdone = force × distance
From the question we have
workdone = 100 × 4
We have the final answer as
400 JHope this helps you
A worker pushes horizontally on a large crate with a force of 190 N, and the crate is moved 3.2 m. How much work was done? ____J
Answers
608 J
ExplanationWorks is the measure of energy transfer that occurs when an object is moved over a distance by an external force at least part of which is applied in the direction of the displacement. it can be calculated by using the formula:
\(work=Force*\text{d}\imaginaryI\text{stance}\)Step 1
a)let
\(\begin{gathered} Force=190\text{ N} \\ Distance=3.2\text{ m} \end{gathered}\)b) now, replace in the formula
\(\begin{gathered} work=Force*\text{d}\imaginaryI\text{stance} \\ work=190\text{ N*3.2 m} \\ work=608\text{ Joules} \end{gathered}\)therefore, the answer is
608 J
I hope this helps you
Find the Thevenin equivalent of the circuit with respect to Z - Express the answer in terms of the Thevenin voltage (Vr), short-circuit current (ise), and Thevenin impedance (ZT).
Answers
The Thevenin Voltage (Vr) of the circuit with respect to Z is 6V.
Thevenin Voltage (Vr) is the equivalent voltage source in a Thevenin equivalent circuit. It is the open circuit voltage that exists between the two terminals of a circuit when all other elements are removed.
The Thevenin equivalent of the above circuit with respect to Z is Vr
= 6V, ise = 0.5A, and ZT = 4Ω.
Calculate the Thevenin Voltage (Vr)
Step 1a: Calculate the total resistance in the circuit
Rtotal = (2Ω + 3Ω) || (4Ω + 5Ω)
= (2Ω*5Ω)/(2Ω + 5Ω) + 4Ω
= 7 Ω
Step 1b: Calculate Thevenin Voltage (Vr):
Vr = (Rtotal/(Rtotal + 4Ω))*6V
= (7Ω/(7Ω + 4Ω))*6V = 6V
Calculate the Thevenin Impedance (ZT)
ZT = Total = 7Ω
Calculate the short-circuit current (ise)
ise = Vr/ZT = 6V
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Question 3 of 15
Which of the following would you be most likely to find in the observations
section of a lab report?
OA. A summary of your findings
OB. Values you have recorded during your experiment
OC. A good question
OD. A prediction about what the results will be.
SUBMIT
Answers
Values you have recorded during your experiment.
option B.
What is the observations section?The observations section of a lab report typically includes a detailed description of the experimental procedure, along with the data that was collected during the experiment.
This section (observations section) is focused on providing a clear and objective account of the experiment, without interpretation or analysis of the results.
Therefore, the observations section is most likely to include values that were recorded during the experiment.
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help me get the answer in Physical Science.
Answers
Answer:
lithium
Explanation:
I took physical science 2 years ago and passed with an A
L Pretest Unit 7
Question 13 of 20
Andrew is trying to identify an unknown element. The element is shiny, but it
shatters when hammered and cannot be hammered into different shapes.
Where on the periodic table is this element most likely found?
A. On the left side
B. In one of the series below the main body of the table
C. On the right side
D. Along the metalloid stairstep line
SURMIT
Answers
Answer:
C
Explanation:
I think it would be there, it sounds like silicone and thats on the right side
A ratio that compares the width and length of a garden is what type of model?
Answers
Answer:
physical
PLEASE MARK ME AS A BRAINLIEST
Answer: Mathematical
Explanation: I took the quiz
why do spheres move apart after contact
Answers
Answer:
Explanation:
When spheres or objects come into contact and then move apart, it is typically due to the presence of an external force or energy imparted to the system. There are a few possible reasons for spheres to move apart after contact:
Elasticity: If the spheres are made of elastic materials, such as rubber or certain metals, they can deform upon contact and then regain their original shape when the external force is removed. This elasticity causes the spheres to move apart.
Repulsive forces: If the spheres have like charges or magnetic properties, they can experience repulsive forces when brought close together. These repulsive forces push the spheres apart once the external force is no longer present.
Conservation of momentum: If the spheres are initially at rest and then pushed together with an external force, the conservation of momentum requires them to move apart after the force is removed. This is due to Newton's third law of motion, which states that for every action, there is an equal and opposite reaction.
Overall, the specific reason for spheres moving apart after contact depends on the properties of the spheres and the nature of the external force or energy involved.
A peregrine falcon dives at a pigeon. The falcon starts downward from rest and falls with free-fall acceleration. If the pigeon is 68.6 m below the initial position of the falcon, how long does the falcon take to reach the pigeon? Assume that the pigeon remains at rest. The acceleration of gravity is 9.8 m/s².
Answers
The falcon take 14 seconds to reach the pigeon.
What are equation of motion ?A mathematical expression that expresses the location, speed, or acceleration of a body in relation to a specified frame of reference is called as Equation of motion,
By using equation of motion
s = \(\frac{1}{2}\)g\(t^{2}\)
where, s = total distance travelled by an object = 68.6 m
g = acceleration of gravity = 9.8m/\(s^{2}\)
t = time taken to travel the distance = ?
Therefore, t = \(\sqrt{2s/g}\)
t = \(\sqrt{2*68.6/9.8}\)
t = 14 seconds
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What is the momentum of a 0.50 kg apple falling at 0.10 m/s? O 5 kg *m/s downward O 15 m/s/s downward O 5 m/s/s downward O 0.05 kg*m/s downward
Answers
Answer:
0.05 kg*m/s downward
Explanation:
The momentum of an object is equal to its mass multiplied by its velocity. In this case, the mass of the apple is 0.50 kg and its velocity is 0.10 m/s, so the momentum of the apple is:
0.50 kg * 0.10 m/s = 0.05 kg*m/s
Therefore, the correct answer is D: 0.05 kg*m/s downward.
Answer the following Critical Thinking Questions. Each answer is worth 5 points, for a total of 25 points.
A particular star is 20 pc away from the Earth, and its luminosity is 160 times the luminosity of the Sun and has a surface temperature of 4000 K. Its absolute magnitude is -0.66. The temperature of the Sun is 5800 K. Explain/show your work.
What is this star's parallax?
What is this star's spectral class?
What is the wavelength at which this star radiates the most energy?
What is this star's apparent magnitude?
What is this star's radius, in solar radii?
Answers
Using the absolute magnitude (M) and apparent magnitude (m) relation, we can find the star's apparent magnitude:
m - M = -5 + 5 log(d)
where d is the distance to the star in parsecs.
Plugging in the values we have, we get:
m - (-0.66) = -5 + 5 log(20)
m = 3.34
Therefore, this star's apparent magnitude is 3.34.
The star's luminosity is 160 times that of the Sun.
Using the Stefan-Boltzmann law, we can find the star's radius:
L = 4πR²σT⁴
where L is the luminosity, R is the radius, σ is the Stefan-Boltzmann constant, and T is the surface temperature.
We can write the ratio of the star's luminosity to that of the Sun as:
L/Lsun = (R/Rsun)²(T/Tsun)⁴
Plugging in the values we have, we get:
160 = (R/Rsun)²(4000/5800)⁴
Solving for R, we get:
R = 10.7 R⊙
Therefore, this star's radius is 10.7 times that of the Sun.
Using Wien's law, we can find the wavelength at which the star radiates the most energy:
λmax = 2.898 × 10⁶ / T
Plugging in the values we have, we get:
λmax = 724.5 nm
Therefore, this star radiates most of its energy at a wavelength of 724.5 nm.
The star's surface temperature is 4000 K.
Using the Harvard spectral classification system, we can find the star's spectral class based on its surface temperature:
O B A F G K M
50,000 10,000 7500 6000 5200 3700 2400
The star's surface temperature falls in the range of a K-type star.
Therefore, this star's spectral class is K.
Finally, we can use the definition of parallax to find the star's parallax:
p = 1/d
where p is the parallax in arcseconds and d is the distance to the star in parsecs
A muon is a type of subatomic particle. If a muon is at rest in the laboratory, it will decay into an electron after about 2 microseconds. Suppose an observer watches a muon travel through the atmosphere at 90% of the speed of light. How does the lifetime of the moving muon compare to the laboratory muon for an observer at rest with respect to the lab
Answers
Answer:
\(\frac{t}{t_p}\) = 2.29
Explanation:
For this exercise as the muon goes at speeds close to the speed of light we must use relativists
t =\(\frac{t_p}{\sqrt{1- (\frac{v}{c})^2 } }\)
The proper time is the decay time in the reference frame where the muon is fixed ( laboratory), t_p = 2 10⁻⁶ s and the relation
v / c = 0.90
let's calculate
t = \(\frac{2 \ 10^{-6} }{\sqrt{1 \ - \ 0.9^2 } }\)2 10-6 / Ra (1 - 0.9²)
t = 4.59 10⁻⁶ s
the ralation is
\(\frac{t}{t_p} = \frac{4.59 \ 10^{-6}}{ 2 \ 10^{-6}}\\\)
\(\frac{t}{t_p}\) = 2.29
A piston absorbs 42 J of heat from its surroundings while being compressed
from 0.0007 m³ to 0.0002 m³ at a constant pressure of 1.0 × 105 Pa. What
are the correct values for heat and work for the piston?
OA. Q=-42 J, W = +50 J
OB. Q = +42 J, W = +50 J
OC. Q = +42 J, W = -50 J
OD. Q = -42 J. W = -50 J
Answers
The correct values for heat and work for the piston are;
Q = +42 J, W = -50 J
Option C
What is the work done?
We must note that the work that has been done by the piston can be obtained by the formula that we know and that formula states that;
w = PdV
w = work that have been done
P = pressure
dV = change in the volume
As such we would have that the work done is;
w = 1.0 × 10^5 Pa (0.0002 - 0.0007)
w = -50 J
This is the work that has been done but the heat was absorbed hence it is positive.
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An electron is accelerated using Coolidge tube of high voltage 30 KV, calculate the frequency and wave length of the produced X-ray if the electron loses one third of its velocity.
Answers
In order to solve this problem we need the following equations:
\(E=qV\)\(E=\frac{hc}{\lambda}\)So:
\(\begin{gathered} q=1.6\times10^{-19}C \\ E=1.6\times10^{-19}\cdot30000 \\ E=4.8\times10^{-15}J \end{gathered}\)So:
\(\begin{gathered} 4.8\times10^{-15}J=\frac{hc}{\lambda} \\ _{\text{ }}where\colon \\ c=\frac{1}{3}(3\times10^8\frac{m}{s}) \\ h=6.626\times10^{-34}\cdot J\cdot s \\ _{\text{ }}solve_{\text{ }}for_{\text{ }}\lambda\colon \\ \lambda=\frac{\frac{1}{3}(3\times10^8\frac{m}{s})\cdot6.626\times10^{-34}\cdot J\cdot s}{4.8\times10^{-15}J} \\ \lambda=1.38\times10^{-11}m=0.0138nm \end{gathered}\)