An object rotates with an angular speed that varies with time, as shown in the graph. How can the graph be used to determine the magnitude of the angular acceleration α of the object? Justify your selection.


Subtract the greatest value of the angular speed from the smallest value of the angular speed, because α=Δω.

Subtract the greatest value of the angular speed from the smallest value of the angular speed, because a equals delta omega .

Determine the slope of the line from 0s to 2s, because the slope represents ΔωΔt.

Determine the slope of the line from 0 second to 2 seconds , because the slope represents the fraction delta omega over delta t .

Determine the area bounded by the line and the horizontal axis from 0s to 2s, because α=12ωΔt.

Determine the area bounded by the line and the horizontal axis from 0 second to 2 seconds , because alpha equals one half omega delta t .

The angular acceleration cannot be determined without knowing the rotational inertia of the object.

Answers

Answer 1

We can find it up angular velocity with respect to time graph .

As

[tex]\\ \rm\Rrightarrow m=\dfrac{\Delta \omega}{\delta T}[/tex]

[tex]\\ \rm\Rrightarrow \alpha=\dfrac{\Delta \omega}{\delta T}[/tex]

So we get

[tex]\\ \rm\Rrightarrow m=\alpha[/tex]

We need the slope in order to find angular acceleration

Answer 2

We can determine the angular acceleration of the object by taking the slope of the line in the plot of angular speed versus time because the change in linear here.

What is angular acceleration ?

The angular acceleration of an object is the measure of its rate of change in angular speed. Like the velocity, it a vector quantity and is characterized by a magnitude and direction.

The acceleration is the ratio of change in velocity to the time interval. From the graph of speed of an object versus the time taken, we can obtain the acceleration.

For a linear relation between the two quantities, the slope gives their ratio. Therefore, here, the slop of the line from 0 to 2 seconds represents the fraction delta omega over delta t. Hence, option D is correct.

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An Object Rotates With An Angular Speed That Varies With Time, As Shown In The Graph. How Can The Graph

Related Questions

A current in a wire increases from 2 a to 6 a. how will the magnetic field 0.01 m from the wire change? it increases to four times its original value. it increases to three times its original value. it decreases to one-fourth its original value. it decreases to one-third its original value.

Answers

Answer:

 It increases to three times it's original value.

Explanation:

B

Hi there!

Recall the equation for the magnetic field of a wire (assuming infinite):

[tex]B = \frac{\mu _0 i_{encl}}{2\pi r}[/tex]

B = Magnetic field (T)
μ₀ = Permeability of Free Space (Tm/A)

i = enclosed current (A)
r = distance from wire (m)

From the equation, we can see that there is a DIRECT relationship between the current and the magnetic field.

Therefore, if the current is increased by a factor of 3, the FIELD will also be increased by a factor of three.


which change of state is shown in the photo

A) Liquid to solid
B) Liquid to gas
C) Gas to liquid
D) Solid and liquid

Answers

The change of state that is shown here is from solid to liquid. The correct option is D.

What is states of matter?

A state of matter is one of the various forms that matter can take in physics. In everyday life, four states of matter are visible: solid, liquid, gas, and plasma.

In most environments, matter can exist in three distinct physical states: solid, liquid, and gas. In extreme environments, other states such as plasma, Bose-Einstein condensate, and neutron stars may exist.

Here in the given image, ice which is a solid is getting transformed into water i.e., liquid, so it can be considered that the phase is transforming from solid to liquid.

Thus, the correct option is D.

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What is the term for either the number of times per second that a wave vibrates or the number of matching points that pass a location during one second? O A. Frequency B. Period O C. Wavelength D. Amplitude​

Answers

The right answer is Frequency. Option A

Frequency is defined as the number of wave oscillations per unit of time and is measured in hertz. Frequency is directly proportional to pitch. Distance from the rest position to maximum shaft deflection. Frequency The number of waves he passes through a particular point per second. Measures the time it takes for a wave cycle to complete.

Maximum displacement or distance traveled by a point on the vibrating body or shaft, measured from the equilibrium position. This corresponds to half the length of the vibration path. The frequencies are opposite. The number of wave cycles to complete per second. Both amplitude and wavelength are measures of distance. Amplitude measures the height of the wave crest from the centerline. Wavelength measures the horizontal distance between cycles.

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Use work and energy to find an expression for the speed
of the block in the following figure just before it hits the
floor.(Figure 1)

Answers

Since the kinetic energy is equal to the potential energy then the speed of the object is √2gh.

Work and energy

The term work refers to the product of force and distance moved by force while energy is the ability to do work. The question is incomplete as the figure is not shown.

We know that the kinetic energy is equal to the potential energy hence;

mgh = 1/2mv^2

gh= 1/2v^2

v = √2gh

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what is this one too i dont know im lazy right now

Answers

Answer:

The answer is Digestion (d)

The main environmental effects of ozone depletion could include all of the following except

Answers

The main environmental effects of ozone depletion could include the following:

higher risk of skin cancersunburnsquick ageingweakend immune system

What is ozone depletion?

Ozone depletion is the gradual thinning of the ozone layer in the upper atmosphere as a result of the relelase of chemical compounds or gases.

Ozone layer helps prevent the Earth surface against incoming ultraviolet radiations that could cause damage to our environment.

Therefore, the main environmental effects of ozone depletion could include the following:

higher risk of skin cancersunburnsquick ageingweakend immune system

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The following are some of the primary environmental implications of ozone depletion and increased risk of skin cancer, sunburns, rapid aging, and the immune system being weakened.

What is ozone depletion, and how does it happen?

The progressive weakening of the ozone layer in the upper atmosphere as a result of the release of chemical compounds or gases is known as ozone depletion.

The ozone layer protects the Earth's surface from harmful UV rays that may harm our environment. As a result, the primary environmental effects of ozone depletion could include:

1. An increased risk of skin cancer

2. Sunburns

3. Rapid aging

4. The immune system is weakened.

Hence increased risk of skin cancer is the main environmental effect of ozone depletion.

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to be a social worker, you must have a master’s degree
A.True
B.False

Answers

Answer:

B --  False

Explanation:

Hope this helps! Please let me know if you need more help or think my answer is incorrect. Brainliest would be MUCH appreciated. Have a wonderful day!

Plsss help with this, will give brainliest!!! ​

Answers

Answer:

c

True

True

False

True

**

metals, non-metal, high, lower

Explanation:

16. By how much leeway (both percentage and mass) would you have in the selection of the mass of the object in the previous problem if you did not wish the new period to be greater than 2.01 s or less than 1.99 s?

Please show all of your work.

Answers

Here is the solution for previous question

[tex]\\ \rm\rightarrowtail T=2\pi\sqrt{\dfrac{m}{k}}[/tex]

[tex]\\ \rm\rightarrowtail T\propto \sqrt{m}[/tex]

Hence

[tex]\\ \rm\rightarrowtail \dfrac{T_1}{T_2}=\sqrt{\dfrac{m1}{m2}}[/tex]

[tex]\\ \rm\rightarrowtail \dfrac{1.5}{2}=\sqrt{\dfrac{0.5}{m2}}[/tex]

[tex]\\ \rm\rightarrowtail 0.75^2=\dfrac{0.5}{m2}[/tex]

[tex]\\ \rm\rightarrowtail m_2=\dfrac{0.5}{0.75^2}[/tex]

[tex]\\ \rm\rightarrowtail m_2=0.888888888\dots[/tex]

So

from this

So it's infinite in terms of 8 so must be greter than one 8

We rounded it up for 3 decimals

0.889kg

So

Error range=[1.99,2.01]

∆Error=2.01-1.99=0.02

Very mere one

Now find percentage

[tex]\\ \rm\rightarrowtail \dfrac{0.02}{2}(100)=0.01(100)=1\%[/tex]

Mass should be lied in

0.01(0.889)=0.00889 kg

But for increase mass

it would be

0.00889-0.00500=0.00389kg

you have to choose more than one on this

Answers

b/c bc it’s just b and c

What does it mean for something to have charge?

Answers

the property of matter that is responsible for electrical phenomena, existing in a positive or negative form.
When talking about charge, it is usually referring to an electric charge. A charge can be positive or negative.

Which best describes an action related to interdependence?
A. limiting the amount of fish harvested to ensure future availability
B. finding methods for extracting oil with minimal damage to the environment
C. using calculations to ensure that lumber is used efficiently
D. predicting the profits from selling metal that is extracted from ore

Answers

[tex]\small\color{blue}{⊱─━━━━━━━━━⊱༻●༺⊰━━━━━━━━━─⊰}[/tex]

Which best describes an action related to interdependence?

A. limiting the amount of fish harvested to ensure future availability

B. finding methods for extracting oil with minimal damage to the environment

C. using calculations to ensure that lumber is used efficiently

D. predicting the profits from selling metal that is extracted from ore

[tex]\small\color{blue}{⊱─━━━━━━━━━⊱༻●༺⊰━━━━━━━━━─⊰}[/tex]

The living things in an ecosystem are interdependent. This means that living things depend on their interactions with each other and also nonliving things for survival. For example, a tree depends on sunlight for energy and food.

[tex]\small\color{blue}{⊱─━━━━━━━━━⊱༻●༺⊰━━━━━━━━━─⊰}[/tex]

-PoliteCat

#CarryOnLearning

[tex]\large\boxed{\text{Learn With Brainly!!}}[/tex]

ᴄʟɪᴄᴋ ᴛʜɪs ↓

A physician is going to use high-frequency electromagnetic radiation to treat cancer in a patient. Which is a claim about this event?(1 point)

A wave model is most useful for describing the frequency of the radiation.


Using gamma rays is the best to treat cancer because they act like particles.

The radiation will destroy the cells by transferring energy to them.


All of the cancer cells in the targeted region will be destroyed by the radiation.

Answers

Answer:

The answer is B

Explanation:

This is the only statement that is opinionated, therefore it is the only claim.

Answer: A wave model is most useful for describing the frequency of the radiation

Explanation:

I just took the test

A runner begins from rest at the starting line and travles for 6.5 seconds, a runner reaches a speed of 13.4 m/s what is the runners acceleration?

Answers

The acceleration of the runner in the given time is 2.06m/s².

Given the data in the question;

Since the runner begins from rest,

Initial velocity; [tex]u = 0[/tex]Final velocity; [tex]v = 13.4m/s[/tex]Time elapsed; [tex]t = 6.5s[/tex]

Acceleration of the runner; [tex]a = \ ?[/tex]

Velocity and Acceleration

Velocity is the speed at which an object moves in a particular direction.

Acceleration is simply the rate of change of the velocity of a particle or object with respect to time. Now, we can see the relationship from the First Equation of Motion

[tex]v = u + at[/tex]

Where v is final velocity, u is initial velocity, a is acceleration and t is time elapsed.

To determine the acceleration of the runner, we substitute our given values into the equation above.

[tex]v = u + at\\\\13.4m/s = 0 + (a * 6.5s)\\\\13.4m/s = a * 6.5s\\\\a = \frac{13.4m/s}{6.5s}\\ \\a = 2.06m/s^2[/tex]

Therefore, the acceleration of the runner in the given time is 2.06m/s².

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What is average acceleration? How does acceleration occur?

Answers


Average acceleration is the change in velocity with time.
Acceleration takes place when velocity changes with time. Velocity being a vector quantity may change in magnitude or direction any of the change results to acceleration

The pace at which a body's velocity varies is represented by average acceleration, which is a vector quantity.

What is average acceleration?

The rate of change of velocity with respect to time is known as acceleration. According to Newton's second law, the eventual effect of all forces applied to a body is its acceleration.

The formula for acceleration is;

[tex]\rm a = \frac{v-u}{t}[/tex]

u is the initial speed

v is the final speed

t is the time interval

a is the acceleration of ball

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Thermal energy is transferred between objects when they have?
A. the same mass
B. different temperatures
C. the same kinetic energy

Answers

The answer is B I had to answer this question one time

Answer:

B. different temperatures

Explanation:

Thats how they transfer energy because if one object is hotter then the other, the heat can still be transfer to the other object and make their temperatures the same

A current of 5. 0 amperes is passing through a piece of wire. Determine how long it takes for 30 coulombs of charge to pass through this wire

Answers

The time taken for the charge to pass through the cross-section of the wire is 6.0s.

Given the data in the question;

Current; [tex]I = 5.0A[/tex]

Charge; [tex]Q = 30C[/tex]

Time; [tex]t = \ ?[/tex]

Current

Current is simply the rate of flow of charged particles i.e electrons caused by EMF or voltage.

If a charge passes through the cross-section of a conductor in a given time, the current I is expressed as;

[tex]I = \frac{Q}{t}[/tex]

Where Q is the charge and t is time elapsed.

We substitute our given values into the expression above to determine the time it took the charge to pass through this wire.

[tex]I = \frac{Q}{t}\\ \\5.0A = \frac{30C}{t} \\\\t = \frac{30C}{5.0A} \\\\t = 6.0s[/tex]

Therefore, the time taken for the charge to pass through the cross-section of the wire is 6.0s.

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The time taken by 30 coulombs of charge to pass through this wire is 6 seconds.

What is current?

The pace at which electrons flow past a point in an electrical circuit is referred to as current.

Current is the ratio of charge and time. Given that the current is equal to 5.0 Amp, while the charge is equal to 30C. Therefore, the time will be equal to,

[tex]I=\dfrac{Q}{t}\\\\5 =\dfrac{30}{t}\\\\t = 6\rm\ sec[/tex]

Hence, the time taken by 30 coulombs of charge to pass through this wire is 6 seconds.

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A solid cylinder with diameter 20cm has an angular velocity of 10m/s and angular momentum of 2kgm^2/s. What is its mass?

Answers

Hi there!

Recall the equation for angular momentum:
[tex]L = I\omega[/tex]

L = Angular momentum (kgm²/s)
I = Moment of Inertia (kgm²)
ω = angular velocity (rad/s)

We know that the Moment of Inertia of a solid cylinder is equivalent to:
[tex]I = \frac{1}{2}MR^2[/tex]

M = mass (kg)
R = radius (m)

Plug in the givens to solve for the moment of inertia. Remember to divide the diameter by 2 for the radius, and to convert to meters.

[tex]r = \frac{d}{2} = 20/2 = 10 cm \\\\10 cm = 0.1 m[/tex]

[tex]I = \frac{1}{2}M(0.1^2) = 0.005 M[/tex]

We can rearrange the equation of angular momentum to solve for mass.

[tex]L = 0.005M * \omega\\\\\frac{L}{0.005 \omega} = M \\\\M = \frac{2}{0.005(10)} = \boxed{ 40 kg}[/tex]

Why does the final electron energy not depend on the focusing cylinder voltage?

Answers

The electron energy does not depend on the focusing cylinder voltage because the magnetic field runs perpendicular to the electron's direction of movement.

What is a magnetic field?

A magnetic field is produced by moving negatively electric charges (electrons) which generate magnetic forces that are observable.

The negative electrons that orbit around atoms in a molecule generate small magnetic fields around such atoms.

According to Fleming's left-hand rule, the direction of a magnetic force acting on a current is perpendicular to the direction of the electric current and magnetic field.

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Because it exerts a force that's also parallel to the horizontal fields instead of in opposition to it, the final electron energy is unchanged by the focusing cylinder voltage.

What is electron energy?

An electron's energy is on the same scale (in the same range) as that of light. The lines in an element's spectrum represent changes in the energy of electrons within the element's atoms. Scientists have reached numerous conclusions regarding the behavior of electrons in atoms by studying these spectra.

Negative electrons orbiting around atoms in a molecule produce modest magnetic fields surrounding them.

The vector of a magnetic force that acts on a current is opposite to the axis of the electric current and magnetic fields, as per Fleming's left-hand rule.

Thus, because it exerts a force that's also parallel to the horizontal fields instead of in opposition to it, the final electron energy is unchanged by the focusing cylinder voltage.

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Please help, question is the picture.

Answers

Answer:

Mirror angle:

25°

50°

Angle of incidence (θi):

25°

50°

Angle of reflection (θr)

25°

50°

Explanation:

The mirror angle is the same as the angles of incidence and reflection.

Brainlist Pls!

Please see attached.

Answers

Answer:

D

Explanation:

The speed is increasing and he was stationary which means the acceleration is not 0

In one to two sentences, describe the relationship between harmonics and resonance frequency in a piano.

Answers

Most vibrating things have several resonant frequencies, and musical instruments often vibrate at harmonics of the fundamental frequency. An integer (whole number) multiple of the fundamental frequency is defined as a harmonic.

In a Piano the relation between harmonic and resonance frequency is n_{1} : n_{2} : n_{3} = 1:2:3.

What is harmonic and resonance ?

"It is wave having frequency which is multiple integral of the fundamental frequency. The fundamental frequency is called first Harmonic. If a body starts vibration under impact of external vibrational force , is called Resonance. Since a Piano can produce all type of frequencies due to resonance therefore it produces melodious sound. Hence relation between harmonic and resonance frequency is n_{1} : n_{2} : n_{3}= 1:2:3."

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An atom or ion has the abbreviated electron configuration [kr]. Select the species that it could not be

Answers

An atom or ion which does not have the same electronic configuration as the species [kr] is K+

The complete question is given below:

An atom or ion has the abbreviated electron configuration (Kr). Select the species that it could not A. Br" B. K+ C. Sr24 D. Rbt E. Se-

What is an atom?

An atom can be defined as the smallest particle of an element which can take part in a chemical reaction.

Some elements are

Monoatomic; eg: CDiatomic; eg: O2Triatomic and othersPolyatomic

So therefore, an atom or ion which does not have the same electronic configuration as the species [kr] is K+

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The number of electrons in the atom comprised the atomic number and the electronic configuration. The ionic species that lacks the same configuration as Kr is potassium ion.

What is atom?

An atom is the smallest unit of the matter with the presence of electrons, protons and neutrons as the subatomic particles. The electrons are present in the orbital and the loss and gain of the electrons adds charge to the atom.

The number of electrons in Kr atom is 36. The number of electrons in the following species is:

[tex]\rm Br^-=36\\Sr^{2+}=36\\K^+=18\\Rb^+=36\\[/tex]

Thus, the atom or ionic species that lacks the same configuration as Kr is potassium ion.

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How do you think an object's mass relates to its weight?

Answers

Explanation:

w = m.g

g is Gravity acceleration . on surface of Earth it's

9.8 m/s² ≈ 10 m/s²

A 0.105- kg hockey puck moving at 24 m/s is caught and held by a 75-kg goalie at rest. With what speed does the goalie slide on the ice after catching the puck? Define the puck and the goalie as a system.

please show work, help

Answers

Answer:

0.03 m/s

Explanation:

Applying law of conservation of momentum,

m₁v₁ + m₂v₂ = (m₁ + m₂)v0.105(24) + 75(0) = (0.105 + 75)v75.105v = 2.52v = 2.52/75.105v = 0.03 m/s

At a later time interval, the thrust force is 50N, the drag force is 20N, the lift force is 40N, and the weight (gravity) force is 40N.
25N
Drag
40N
Lift
50N
Thrust
40N
Weight
During this time interval, which forces are unbalanced?

Answers

During this time interval, the unbalanced forces are the downward forces which include drag force and weight of the object.

Net force on the object

The net force on the object is obtained by summing all the forces acting on the object.

Let the upward force = positive

Let the downward force = negative

Thrust force (upward) = 50 NDrag force (downward) = 20 NLift force (upward)  = 40 NWeight (downward) = 40 N

Net force = (50 N + 40 N) - (20 N + 40 N)

Net force = 90 N - 60 N = 30 N

Thus, during this time interval, the unbalanced forces are the downward forces which include drag force and weight of the object.

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HELP MEEEE, question number 5

Answers

Explanation:

The gravitational potential energy of an object is given by GPE=mgh

where m is the mass of the object, g is the gravitational field strength (9.81 m/s² on earth) and h the height it is lifted at above the GPE reference ground.

Mass 1 has a GPE=m¹gh=(2)(9.81)(10)=196.2 Joule

Mass 2 has a GPE=m²gh=(4)(9.81)(10)=392.4 Joule

Object 2 has more potential energy and it makes sense since it's heavier

Hope this helps :))

A sound wave passes from air into water and then into steel. With each change in medium, what happens to the speed of the wave?.

Answers

Answer:

Explanation:

You need to consider the index of refraction.

index of refraction of air: 1.00

index of refraction of water: 1.33

Index of refraction of steel: 2.75681

If the sound wave passed from air into water, it passes from a lower index to a higher index of refraction.

As the wave travels into the more dense medium (higher n), it slows down. Therefore from air to water (lower to higher) it slows down, and from water to steel (n of steel is higher that n of water) therefore it slows down even more.

A student looks at a white light source through spectroscope which views the light through many tiny slits. The student sees a rainbow of colors. Which of these is the best explanation for why the student sees many colors through the slits.

Answers

When the various colors in the spectrum of white light are separated, the student sees a rainbow of colors.

Spectrum of white light

White light is a spectrum of seven wavelengths namely; red, orange, violet, green, blue, indigo, yellow. When white ligt is passed through many tiny slits, these wavelengths become separated.

As a result of the separation of these seven wavelengths that compose white light, the student sees a rainbow of colors.

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Which level instruments operate on the principle of generating a signal and then measuring the time required for the signal to reflect off the process fluid back to the transmitter

Answers

A is the correct answer I believe

One of the most crucial devices for electronics and communication is the signal generator. For several reasons, including testing, debugging, and designing, it is utilized to produce various types of signals and frequencies.

What instruments operate principle of generating a signal?

Engineers create electronic signals using signal generators, which can be analogue or digital, to test circuit designs. Signal generators come in a wide variety of forms with various characteristics and uses. The most typical signal generator kinds and their distinctive qualities are listed below.

Therefore, radar level instruments operate on the principle of generating a signal and then measuring the time required for the signal to reflect off the process fluid back to the transmitter.

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Please Help I don't understand this John is a fourteen-year-old resident of Georgia. One day he skips school, steals a car, drives to the store, and steals alcohol, which he drinks. Has John committed delinquent acts, unruly acts, or both? ST is parallel to RU in the figure. What is m What nursing interventions can be used to improve feeding and eating for the client? 1. How many joules of heat are necessary to melt 500 g of ice at its freezing point?Please show work! Choose one specific natural resource in your region. Describe what it is used for, how it is harvested, what attempts have been made to manage it in a sustainable way, and how social, economic, and environmental needs may come into conflict. Evaluate how effective the attempts of natural resource management have been. I NEED HELP QUICK PLEASE!! What is the definition of philosophy? The study of the literary works of the ancient Greeks A process of thinking by analogy The study of truth,knowledge, and the things of fundamental importance in life An organized study of logic and mathematics Conduction is greater in solids .explain in your own words Why? should people use crispr to change human traits PLEASEEE HELP LOOK AT PICTURE!!! Which of the statements about a reported lost or stolen travel card is true?. What is the range of this data set? 36.6, 39.8, 33.3, 34.8, 35.8, 39.6, 36.7, 36.9, 37.5, 32.2, 33.1, 33.3 One hundred milliliters of water has a mass of 100 grams. what would be the mass of 50 milliliters of water? What were the factors that enabled the British to consolidate theirpower in the Indian Subcontinent A student is writing an essay about the advantages of learning about other cultures. Read the draft of the essay and answer the question that follows.I would love to explore many countries and to learn about people from different cultures. I believe that learning about them does help us realize that we are _not so different.___. For instance, Guatemala is in Central America, not too far from the United States. They have volcanoes, lakes, modern cities, and historical cities such as Antigua Guatemala. Guatemalans work, study, and play just like we do. They speak Spanish, but some people also speak native languages such as Quich, a Mayan language.Which word is the MOST precise replacement for the underlined phrase?A similarB neighborsC closeD related When planning your speech, it is important to start with a well-defined ______________. a. Sourceb. Thesisc. Topicd. Statement When a tax is placed on a product, its_________increases, so its_________ may decrease. People react to the higher prices by buying _______. NEED HELP ASAP The salaries of Nathan and Trisha are in the ratio of 5:9. Trisha's salary is 16800 more than Nathan's. Find Nathan's salary. Which sentence from chapter 2 do NOT support the inference Gherland takes pleasure in cruelty? The Girl Who Drank the MoonA - Gherland and checked his mirror again, touching up his rouge. he rather enjoy teaching the occasional lesson to the citizens of the Protectorate.B - Let us be off. That baby isnt going to sacrifice itself, after all. GherlandC - Grand elder Gherland took his time that morning. The day of sacrifice only came once a year, after all, and he liked to look his best during the sober procession to the cursed house, and during the summer retreat. D - The Grand Elder had ever so many possessions that were unique in the Protectorate. It was one of the perks of the job. Please help i wan't a good grade but I can't figure this out.