Answer:
the correct answer is E
A graph of the cart's maximum speed squared as a function of x^3
Explanation:
For this exercise let's use Newton's second law
F = m a
force has the form
F = k x²
and acceleration is related to velocity
a = dv / dt
Let's use the chain rule or L'Hospital
a = dv /dx dx/dt
a = dv /dx v
let's substitute
k x² = m v dv / dx
k /m x² dx = v dv
we integrate
k /m x³ /3 = v² / 2
v² = (2k /3m) x³
This is the expression for the variation of the speed as a function of the position, to make a linear graph realism the changes of variable
y = v²
x´ = x³
y = (2k/3m) x´
if we graph y vs x 'we have a linear graph whose slope is
m = 2k / 3m
By reviewing the different answers, the correct answer is E
which wavelengths does nitrogen catch ?
Answer:
The strongest lines are at 337.1 nm wavelength in the ultraviolet. Other lines have been reported at 357.6 nm, also ultraviolet. This information refers to the second positive system of molecular nitrogen, which is by far the most common.
Explanation:
5 points
15. *
15. Which one of the following
quantities is NOT a vector?
A velocity
B acceleration
C distance
D displacement
A
B
С
Answer:
distance is not a vector. it is scalar
The diameter of an atom is about 1 angstrom (10-10 m). In order to develop some intuition for the molecular scale of a gas, assume that you are considering 1 liter of air (mostly N2 and 02, with molar masses of 28 g/mol and 32 g/mol respectively) at room temperature and atmospheric pressure (about 105 Pa). As always, be sure to show your work and explain your reasoning.
a) Calculate the number of molecules in this sample of air.
b) Estimate the average spacing between the molecules.
c) Estimate the average speed of a molecule based on the Maxwell-Boltzmann distribution. Convert your answer to miles per hour.
d) Suppose that we scale up the gas so that each atom is the size of a tennis ball. We also scale up the spaces between the atoms proportionally. Now what would be the average spacing between molecules? What would be the mass of a single molecule (assuming that the density of a molecule remains the same)?
Answer:
A) 2.5 * 10^22 molecules
B) 3.33 * 10^-9 m
C) 1134 miles/hour
D) average spacing = 2.1 m , New mass = 17 kg
Explanation:
Given data :
diameter of atom = 10^-10 m
volume of air = 1 liter
molar masses : 28 g/mol of N2, 32 g/mol of O2
atmospheric pressure = 10^5 Pa
attached below is the detailed solution
Which elements from the list below would you expect to have similar properties to sodium? Select all that apply.
Answer:
the third one
Explanation:
Answer:
Beryllium and Calcium
Explanation:
A jump ball in the center of the court is used to start a game
Question 1 options:
True
False
Question 2 (1 point)
Saved
A personal foul is a player that delays the game, has unsportsmanlike conduct, illegal entry or has excessive timeouts
Question 2 options:
True
False
Question 3 (1 point)
Saved
A offended player is awarded 2 free throws if the foul occurred while attempting to make a basket and the basket was missed
Question 3 options:
True
False
Question 4 (1 point)
A basketball game is played with 5 players from one team against 5 players from another team
Question 4 options:
True
False
Question 5 (1 point)
The height of the basket is:
Question 5 options:
9 ft.
11 ft.
10 ft.
8 ft. 6 in.
How can we get a last beace
True or false. The number of images formed depends upon the angle between the mirrors.
* ****
yes it's true................
#indian
Question Completion Status:
A Moving to the next question prevents changes to this answer.
Question 5
A ball gets pushed off a 1.2m high table with a horizontal speed of 9m/s. How far does the ball travel horizontally before hitting the ground?
Answer:
The ball will travel 4.45 m horizontally before hitting the ground
Explanation:
Horizontal Motion
When an object is launched horizontally with a speed v from a height h, the maximum horizontal distance traveled by the object, also called range can be calculated as follows:
[tex]\displaystyle d=v\cdot\sqrt{\frac {2h}{g}}[/tex]
The question provides us with the following data:
Initial speed of the ball: vo=9 m/s
Height: h=1.2
Proceed to calculate the range:
[tex]\displaystyle d=9\ m/s\cdot\sqrt{\frac {2\cdot 1.2\ m}{9.8\ m/s^2}}[/tex]
Calculating:
[tex]\displaystyle d=9\ m/s\cdot\sqrt{0.2449\ s^2}[/tex]
[tex]d=9\ m/s\cdot 0.4949\ s[/tex]
d=4.45 m
The ball will travel 4.45 m horizontally before hitting the ground
If the surface area of a sphere increased by a factor of 3, by what factor did the radius of the sphere change?
Explanation:
The surface area of a sphere is given by :
[tex]A=4\pi r^2[/tex]
r is the radius of the sphere
It can also be written as :
[tex]r\propto \sqrt{A}[/tex]
If the surface area of a sphere increased by a factor of 3, it would mean that,
[tex]r'=k\sqrt{3A}[/tex]
or
[tex]r'=k\sqrt{3} r[/tex]
So, the radius of the sphere change by a factor of [tex]\sqrt{3}[/tex].
Which statement is the inverse of:
If today is Tuesday, then I have Geometry class.
A.I have Geometry class if, and only if, today is Tuesday.
B.I do not have Geometry class today and it is not Tuesday.
C.If today is not Tuesday, then I do not have Geometry class.
D.If I do no have Geometry class today, then it is not Tuesday.
E.If I have Geometry class today, then it is Tuesday.
Answer:
Option c.
Explanation:
Inverse of a statement is defined as the statement in which both hypothesis and conclusion are in negative form.
In the given sentence, "If today is Tuesday, then I have Geometry class", hypothesis is "If today is Tuesday" and the conclusion is "I have Geometry class.".
Inverse of the given statement is :
If today is not Tuesday, then I do not have Geometry class.
write an essay on the topic my best university
Answer:
My favourite university is the University of Machigan.
Explanation:
The motto boldly reads 'Artes, Scientia, Vertia' at University of Machigan which means Arts, Knowledge, and Truth in Latin. Since I was in high school, I always wanted to acquire education/college degree from a university that lived up to its motto. I had a great interest in Social Science and Humanities and always wanted to make a career out of it. The University of Machigan first came across to me while I was reading a monthly magazine at our school library. I read an article called 'Constructing the System: Government and Stakeholders' written by a college student from the University of Machigan. It had interesting developments and insights which really interested me. In fact, it included a very crucial piece of information which was similar to my own political principles.
I did some further research on papers and programs offered at University of Machigan and I felt that it was just the right university for me. I read numerous papers and articles from different departments which were all very academic oriented. Moreover, I started updating myself with the admission criteria at University of Machigan every year and is currently working really hard to achieve admissions there.
I'm still few months away from graduating high school but I can already feel the excitement to go there. I have faith in my academic records and potentials that I would make it there. I'm planning to take up 'Government and Politics' program since that is what I'm most interested at. I hope I would learn and acquire the best knowledge and opportunity from one of the best universities in US or I must say, my favourite university.
Electric bees. Flying insects such as bees may accumulate a small positive electric charge as they fly. In one experiment, the mean electric charge of 50 bees was measured to be +30 PC per bee. Researchers also observed the electrical properties of a plant consisting of a flower on top of a long stem. The charge on the stem was measured as a positively charged bee approached, landed, and flew away. Plants are normally electrically neutral, so the measured net electric charge on the stem was zero when the bee was very far away. As the bee approached the flower, a small net positive charge was detected in the stem, even before the bee landed. Once the bee landed, the whole plant became positively charged, and this positive charge remained on the plant after the bee flew away. By creating artificial flowers with various charge values, experimenters found that bees can distinguish between charged and uncharged flowers and may use the positive electric charge left by an earlier bee as a cue to indicate that a plant has already been visited (in which case, little pollen may remain).
In a follow-up experiment, a charge of 38 pC was placed at the center of an artificial flower at the end of a 30-cm-long stem. Bees were observed to approach no closer than 17 cm from the center of this flower before they flew away. This observation suggests that the smallest external electric field to which bees may be sensitive is closest to which of these values?
a. 2.4 N/C
b. 16 N/C
c. 2.7 x10^-10 N/C
d. 4.8 x 10^-10 N/C
Answer: E = 11.8 N/C
Explanation: Electric field is electric force per unit of charge or
[tex]E=\frac{F}{q}[/tex]
F is electric force calculated as:
[tex]F=\frac{kQq}{r^{2}}[/tex]
Electric field will be:
[tex]E=\frac{kQq}{qr^{2}}[/tex]
[tex]E=\frac{kQ}{r^{2}}[/tex]
where k is coulomb constant and is approximately [tex]9.10^{9}\frac{Nm^{2}}{C^{2}}[/tex]
Changing units to match the constant:
38pC = [tex]38.10^{-12}[/tex]C
17cm = [tex]17.10^{-2}[/tex]m
So, electric field for bees in the given conditions is:
[tex]E=\frac{9.10^{9}.38.10^{-12}}{(17.10^{-2})^{2}}[/tex]
[tex]E=\frac{342.10^{-3}}{289.10^{-4}}[/tex]
E = 11.8N/C
The smallest external electric field to which bees nay be sensitive is 11.8N/C
Three vectors with magnitudes 120N, 100N and 80N are given in the diagram below. Write them using the unit vectors i, j and k. . 100N 80N 53° 40° Y 37° 120N X Trigonometric values you may use Cos37⁰ = 0.8 = sin53° sin37° 0.6 = cos53° cos40° = 0.766, sin40° = 0.643
The vectors can be expressed using unit vectors as follows:
Vector A = 96N i + 96N j + 0N k
Vector B = 76.6N i + 64.3N j + 0N k
Vector C = 64N i + 48N j + 0N k.
In the given diagram, let's consider the vectors as follows:
Vector A with magnitude 120N, Vector B with magnitude 100N, and Vector C with magnitude 80N.
To express these vectors using unit vectors i, j, and k, we need to determine their respective components in the x, y, and z directions.
For Vector A (120N), we have the following information:
Magnitude = 120N
Direction: X-axis (cosine component) with an angle of 37° and Y-axis (sine component) with an angle of 53°.
Using the trigonometric values provided:
cos37° = 0.8 and sin53° = 0.8
Therefore, the components of Vector A are:
Ax = 120N * 0.8 = 96N (in the X-direction)
Ay = 120N * 0.8 = 96N (in the Y-direction)
Az = 0N (no component in the Z-direction)
Thus, Vector A can be written as 96N i + 96N j + 0N k.
Similarly, using the trigonometric values for Vector B and Vector C, we can calculate their components:
For Vector B (100N):
Bx = 100N * cos40° = 100N * 0.766 = 76.6N
By = 100N * sin40° = 100N * 0.643 = 64.3N
Bz = 0N
Vector B can be expressed as 76.6N i + 64.3N j + 0N k.
For Vector C (80N):
Cx = 80N * cos37° = 80N * 0.8 = 64N
Cy = 80N * sin37° = 80N * 0.6 = 48N
Cz = 0N
Vector C can be written as 64N i + 48N j + 0N k.
In summary, the vectors can be expressed using unit vectors as follows:
Vector A = 96N i + 96N j + 0N k
Vector B = 76.6N i + 64.3N j + 0N k
Vector C = 64N i + 48N j + 0N k.
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How much work does the force F(x)=(−2.0/x)N do on a particle as it moves from x=2.0m to x=5.0m?
Answer:
F(2.0)= -1N
F(5.0)= -0.4
Explanation:
The work done by the force F(x) as the particle moves from x = 2.0 m to x = 5.0 m is -6.0 Joules.
Given,
Force = (−2.0/x)N
Initial point = 2m
Final point = 5m
To calculate the work done by a force, the formula:
Work = Force × Displacement × cos(θ)
The angle θ between the force and displacement vectors is 0 degrees since they are aligned.
Plugging these values into the formula:
Work = (-2.0/2.0 N) × 3.0 m × cos(0°)
Simplifying,
Work = -2.0 N × 3.0 m × 1
Work = -6.0 Joules
Therefore, the work done by the force F(x) as the particle moves from x = 2.0 m to x = 5.0 m is -6.0 Joules. The negative sign indicates that the work is done in the opposite direction of the displacement.
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The chemical formula shows the basic unit of sugar.
C12H22011
What makes up a basic unit of sugar?
03 atoms from 5 molecules
O 3 molecules from 45 elements
45 atoms from 3 elements
03 atoms from 45 molecules
Jacob is a white male who has lived in an economically depressed area for his entire life. His mother had him when she was very young, so he lives with her, his grandmother, his uncle, and his little sister in a small appointment. There is not a lot of space, so it is hard for Jacob to concentrate on homework and often he doesn’t do it. Is Jacob at risk for dropping out of high school?
A.
Yes. Jacob’s background suggests a lot of risk factors.
B.
Yes. It is clear that Jacob thinks he can succeed without school.
C.
No. Race is the most important factor in determining which students drop out.
D.
No. Jacob just needs to find a place where he can focus and complete his work.
The environmental and familial challenges he faces indicate an increased risk of dropping out. Yes. Jacob's background suggests a lot of risk factors is the most accurate response. Here option A is the correct answer.
Jacob's situation presents several risk factors that could increase his likelihood of dropping out of high school. First, living in an economically depressed area can limit access to quality educational resources and opportunities, making it harder for Jacob to thrive academically. The lack of space in his small apartment further compounds the problem, as it becomes challenging for him to concentrate on his homework. The absence of a conducive environment for studying can negatively impact his motivation and ability to complete assignments consistently.
Moreover, Jacob's family dynamics may also contribute to his risk of dropping out. Being raised by a young mother, living with his grandmother, uncle, and little sister in a crowded space could imply limited financial resources and potential disruptions at home. These factors may increase stress levels and make it more difficult for Jacob to prioritize his education and engage in school-related activities effectively.
While race and ethnicity can influence educational outcomes, it is essential to consider the specific circumstances and individual factors in Jacob's life rather than assuming that race alone is the most important determinant.
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An object with a mass of 300 kg is
observed to accelerate at the rate of
4m/s ? Calculate the total force
required
Answer:
m= 300
a= 4ms
f = ma
= 300×4
= 1200N
Answer: F = 1200 N
Explanation:
Hey there!
It is given that,
Mass of the object, m = 300 kg
Acceleration of the object when it is moving, [tex]a = 4m/s^{2}[/tex]
If F is the force required to produce this acceleration. It is given by using the second law of motion as :
Calculations
F = m × a
F = 300 kg × [tex]4m/s^{2}[/tex]
F = 1200 N
So, the force required to produce this acceleration is 1200 N. Hence, this is the required solution.
~I hope I helped you! :)~
1. Which object would have more inertia — a 1,000 kg car or a 150 kg golf cart?
Answer:a car with 1,000kg
Explanation: A car with a mass of 1,000kg has more inertia than 150 kg
Out of the two objects a 1000-kilogram car and a 150-kilogram golf cart, the 1000-kilogram cart will have more inertia as the inertia of any object is directly proportional to its mass.
What is Newton's first law?According to Newton's first law, until pushed to alter its condition by the intervention of an external force, every object will continue to be at rest or in uniform motion along a single direction.
The larger the mass of the object, the greater would be the inertia of the object.
Thus, a 1000-kilogram automobile will have higher inertia than a 150-kilogram golf cart since any object's inertia is directly proportionate to its mass.
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Henrietta is going off to her physics class, jogging down the sidewalk at a speed of 4.15 m/s . Her husband Bruce suddenly realizes that she left in such a hurry that she forgot her lunch of bagels, so he runs to the window of their apartment, which is a height 44.4 m above the street level and directly above the sidewalk, to throw them to her. Bruce throws them horizontally at a time 8.00 s after Henrietta has passed below the window, and she catches them on the run. You can ignore air resistance.
Required:
a. With what initial speed must Bruce throw the bagels so Henrietta can catch them just before they hit the ground?
b. Where is Henrietta when she catches the bagels?
Answer:
a 15.22 m/s
b 45.65 m
Explanation:
Using the same formula,
x = vt, where
x is now 45.65, and
t is 3 s, then
45.65 = 3v
v = 45.65/3
v = 15.22 m/s
See the attachment for the part b. We used the distance gotten in part B, to find question A
Can you help me with this question?
Verse 16:
A particle oscillates harmonically on the axis
. The graph below shows a fraction of the particle's displacement over time. Which of the following is the maximum velocity of the particle closest to?
The maximum velocity is vmax = ωA = (2π)(0.04) = 0.08π units/s.
In order to find the maximum velocity of a particle oscillating harmonically on the axis, we must use the relationship between velocity and displacement. The graph of the particle's displacement over time can help us find this relationship.Verse 16: This verse contains the necessary information to answer the question. The graph shows the displacement of the particle over time, with the highest point being 0.04 units and the lowest point being -0.04 units. From this, we know that the amplitude of the oscillation is 0.04 units.To find the maximum velocity, we can use the formula:v = ωAcos(ωt + φ), where: v = velocity, ω = angular frequency, A = amplitude, cos = cosine function, t = time, φ = phase angleSince we are looking for the maximum velocity, we need to find when the cosine function is at its maximum. This occurs when cos(ωt + φ) = 1. Therefore, the maximum velocity is given by:vmax = ωAAt maximum displacement, the velocity is zero. Therefore, we need to find the angular frequency, which is given by:ω = 2πf, where f is the frequency. From the graph, we can see that one complete cycle takes 1 second. Therefore, the frequency is: f = 1 cycle/1 sec = 1 HzTherefore,ω = 2πf = 2π(1) = 2π rad/sNow we can find the maximum velocity: vmax = ωA = (2π)(0.04) = 0.08π units/sSummary: To find the maximum velocity of a particle oscillating harmonically on the axis, we can use the relationship between velocity and displacement. The graph of the particle's displacement over time can help us find this relationship. The formula v = ωAcos(ωt + φ) is used to find the maximum velocity, which occurs when the cosine function is at its maximum.The maximum velocity is given by vmax = ωA. From the graph, we know that the amplitude of the oscillation is 0.04 units and that one complete cycle takes 1 second. Therefore, the maximum velocity is vmax = ωA = (2π)(0.04) = 0.08π units/s.For more questions on maximum velocity
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OOOO
What are some of the factors that can cause a person to have a single-gene disease or disorder?
Explanation:
When a certain gene is known to cause a disease, we refer to it as a single gene disorder or a Mendelian disorder. For example, you may have heard of cystic fibrosis, sickle cell disease, Fragile X syndrome, muscular dystrophy, or Huntington disease. These are all examples of single gene disorders.
Answer: mitochondrial inheritance patterns, autosomal inheritance patterns, mutations.
Explanation:
If the ball is released from rest at a height of .96 m above the bottom of the track on the no slip side
EXTREMELY URGENT! DUE IN 15 MINUTES
Answer:
Antibiotics can only kill bacterial infections. they cant treat viruses because it's a viral infection that spreads through the body
They can't be used to treat infections caused by the Corona or any virus because antibiotics only kill bacterial infections. They can not treat Corona or any virus because it's a viral infection that spreads through out the body.
3. Range of a projectile motion is
maximum at angle of:
О O
А. 180°
В. 75°
С. 45°
D.90
Answer:
a
Explanation:
The ossicles (the three tiny bones in the middle ear) are responsible for __________.
A.
converting sound vibrations into neural signals
B.
relaying sound vibrations to the eardrum
C.
vibrating in response to sound waves
D.
amplifying sound vibrations from the eardrum
Answer:
It's actually ( D )
Explanation:
NOT B
Answer:
The answer is D. Just took the test
Explanation:
Peace and love and give the other person the brainliest lol
As mass decreases, kinetic energy increases.
Question 1 options:
True
False
Answer: False
Explanation: Kinetic energy and mass are directly proportional. So a decrease in mass would cause a decrease in energy.
False. As mass decreases, kinetic energy also decreases.
The energy possessed by a body due to its motion is called kinetic energy.
If m is the mass of the object moving with a velocity v, then the kinetic energy of the object is given by:
KE= (1/2)m×v²
As given in question mass is decreasing, so kinetic energy also decreases because it is directly proportional to mass.
Therefore, the kinetic energy decrease with a decrease in mass. So, the correct option is "false.
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A ball is thrown up with a speed of 30 m/s and caught when it comes back down. You can ignore air resistance.
Where will the ball's instantaneous VELOCITY be 0 m/s?
A. At the top of its path
B. Just before it is caught at the end of it's path
C. Half way to the top of it's path
D. Just after leaving the throwers hand
Answer:
The answer is B have a great day hope I helped
L 1.1.4 Quiz: Wave Interactions
Question 2 of 10
A light wave traveling through air passes into a new medium. What can result
when some of the wave's energy is absorbed by the new medium?
A. The wave's amplitude increases.
B. The wave's energy decreases.
C. The medium's energy decreases.
O D. The medium's mass increases.
Answer:
Answer B is correct: The wave's energy decreases.
Explanation:
When some of the wave's energy is absorbed by the new medium, the wave's energy decreases. Hence, option (B) is correct.
What is wave?A wave is an energetic disturbance in a medium that doesn't include any net particle motion. Elastic deformation, a change in pressure, an electric or magnetic intensity, an electric potential, or a change in temperature are a few examples.
When light wave transmits from one medium to another medium, some amount of energy of the light wave is absorbed by the new medium. Then the transmitted light wave travels with remaining energy. So, the energy of the wave decreases in this case. Hence, option(B) is correct.
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atas nacion
What is the mass of a cart that has an acceleration of 5 ms-2 when a net force of 2000 N is applied to it
Answer:
400 kg
Explanation:
Net force equals mass times acceleration.
∑F = ma
2000 N = m (5 m/s²)
m = 400 kg
urgent pls help
Which of the following best explains why the sand at the beach is hotter
than the water? *
Answer:
the answer is d. because water has a higher specific heat capacity than sand
