A taut string has a length of 2.60m and is fixed at both ends. (a) Find the wavelength of the fundamental mode of vibration of the string (b)Can you find the frequency of this mode? Explain why or why not

Answer:

its D

Explanation:

i just got it correct on a. p. e. x. :)

Answer:

from 60 to 100.

Explanation:

Normal heart rates at rest: Children ages 6 - 15 70 – 100

Adults (age 18 and over) 60 – 100

Changes in initial conditions can have varying effects on the final temperature. Decreasing the volume of tea and increase in initial temperature of the tea would result in a lower final temperature.

To evaluate the impact of changes in initial conditions on the final temperature of the iced tea, let's consider each variation one by one:

1. Decrease the volume of the tea:
  - If you decrease the volume of the tea, there will be less thermal energy available to transfer to the ice. As a result, the final temperature of the tea would likely be lower than the original temperature.

2. Decrease the mass of ice:
  - When you decrease the mass of ice, there will be less ice available to absorb the heat from the tea. Consequently, the final temperature of the tea would likely be higher than the original temperature.

3. Increase the initial temperature of the tea:
  - By increasing the initial temperature of the tea, there will be more thermal energy present. This excess energy will be transferred to the ice, causing it to melt faster. Consequently, the final temperature of the tea would likely be lower than the original temperature.

4. Decrease the initial temperature of the ice:
  - If you decrease the initial temperature of the ice, there will be less thermal energy available to transfer to the tea. As a result, the final temperature of the tea would likely be higher than the original temperature.

To summarize, the changes in the initial conditions of the system can have varying effects on the final temperature of the iced tea. Decreasing the volume of the tea and increasing the initial temperature of the tea would likely result in a lower final temperature. On the other hand, decreasing the mass of ice and decreasing the initial temperature of the ice would likely result in a higher final temperature.

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Answer:

Learn vocabulary, terms, and more with flashcards, games, and other study tools. ... the complete transfer of valence electron(s) between atoms. It is ... The compound is neutral overall, but consists of positively charged ions called cations and negatively ... an ion with net negative charge, having more electrons than protons.

Explanation:

Speed of the 50th-order maxima on the screen = 0.480 m/s

Given in the question,

Wavelength = 633.0 nm

Dimension of slits = 0.200 mm

Speed of students walking toward the screen = 3.00 m/s

The angle of 50th order fringe =

⇒ d sinθ = mλ

⇒ θ = \(sin^{-1}\)( 50λ / d)

The distance x from the slit to the screen and the distance y of the 50th-order fringe from the central maximum is related by tan θ,

tan θ = \(\frac{y}{x}\)

As the student comes closer to the screen at speed v, the distances between x and y decrease but their ratio stays the same.

tan θ =\(\frac{y}{x}\)

y = x tan θ

\(\frac{dy}{dt}\) = \(\frac{dx}{dt}\)tan θ

Since \(\frac{dx}{dt}\) represents a change in speed so we could assume,

\(\frac{dx}{dt}\) = v

\(\frac{dy}{dt}\) = -v tan θ

As we can see in the question that the distance is decreasing so the change in distance will also decrease hence = \(\frac{dy}{dt}\) will be negative.

\(v_{50th-order}\) = |\(\frac{dy}{dt}\)| = vtanθ

= vtan[ \(sin^{-1}\) (mλ / d) ]

By using this formula we will find the speed of the 50th-order fringe,

\(v_{50th-order}\) = (3.00m/s)tan { \(sin^{-1}\) [ \(\frac{50(633.0 * 10^{-9}m) }{0.200 * 10^{-3} }\) ] }

\(v_{50th-order}\) = (3.00 m/s) tan (9.1053)

\(v_{50th-order}\) = 3.00 x 0.160

\(v_{50th-order}\) = 0.480 m/s

Therefore, speed of the 50th-order maxima on the screen = 0.480 m/s

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Answer:

1.8 kj

Explanation:

Explanation:

A substance's specific heat tells you how much heat is required to increase the mass of

1 g

of that substance by

1

∘

C

.

The equation that establishes a rel;ationship between heat absorbed and change in temperature looks like this

q

=

m

⋅

c

⋅

Δ

T

, where

q

- heat absorbed

m

- the mass of the sample

c

- the specific heat of the substance

Δ

T

- the change in temperature, defined as the difference between the final temperature and the initial temperature of the sample

You have all the information needed to find the amount of heat required to increase the temperature of your sample of mercury by that many degrees Celsius, so just rearange the above equation and solve for

q

q

=

250.0

g

⋅

0.14

J

g

∘

C

⋅

(

62

−

10

)

∘

C

=

1820 J

I'll leave the answer rounded to two sig figs and expressed in kilojoules

q

=

1.8 kJ

Answer Explanation:

A substance's specific heat tells you how much heat is required to increase the mass of

1 g

of that substance by

1

∘

C

.

The equation that establishes a rel;ationship between heat absorbed and change in temperature looks like this

q

=

m

⋅

c

⋅

Δ

T

, where

q

- heat absorbed

m

- the mass of the sample

c

- the specific heat of the substance

Δ

T

- the change in temperature, defined as the difference between the final temperature and the initial temperature of the sample

You have all the information needed to find the amount of heat required to increase the temperature of your sample of mercury by that many degrees Celsius, so just rearange the above equation and solve for

q

q

=

250.0

g

⋅

0.14

J

g

∘

C

⋅

(

62

−

10

)

∘

C

=

1820 J

I'll leave the answer rounded to two sig figs and expressed in kilojoules

q

=

1.8 kJ

Answer link

Answer:

1.8 kj

Explanation:

Answer:

Explanation:add them then divide them by 100 I think

Answer:

Apply the equation of motion

v

=

u

+

a

t

The initial velocity is

u

=

5.12

m

s

−

1

The acceleration is

a

=

0.933

m

s

−

2

The time is

t

=

5.7

s

The final velocity is

v

=

u

+

a

t

=

5.12

+

(

0.933

)

×

(

5.7

)

=

10.438

m

s

−

1

Answer: Nia could measure the temperature of the bottom floor of a house to see if the heat had risen in the house due to convection.

Explanation:

Answer:

Nia could measure the temperature of the bottom floor of a house to see if the heat had risen in the house due to convection.

Explanation:

Because energy transferred by the mass motion of molecules.

Explanation:

A. Something that occupies a volume of space and also has mass

Answer:

B. It is the flow of electrons that have a negative charge to protons that have a positive charge.

Explanation:

Electric charge is a fundamental property of matter that arises from the presence or absence of electrons in an object. Electrons have a negative charge, while protons have a positive charge. When an object has an excess or shortage of electrons, it creates an electric charge. This charge can be measured and is used to explain various electrical and electronic phenomena, including the flow of electric current, the behavior of electric circuits, and the interaction of charged objects with each other. The flow of electrons from one charged object to another is what creates an electric current, which is a flow of electric charge. Thus, the best definition of electric charge is the flow of electrons that have a negative charge to protons that have a positive charge.

Answer:

 E_g = m 392 J,      Ek = m 392

Explanation:

Mechanical energy is a very important concept since if the system does not have friction it remains constant

the potential energy of a system is

          E_g = U = m g (y2 - i)

          E_g = m 9.8 (40 -0)

          E_g = m 392 J

The kinetic energy for this system assuming it started from rest

          E_k = K = ½ m v2

how mechanical energy is conserved

         E_g = E_k

         Ek = m 392

Answer:

very true

Explanation:

u ok?

(their* not there)

But- WHOAH- You don't need to say "Goodbye forever" you could find new friends who love and support you. People say things, they do things, but they're still human, just like you are. Mistakes will be made. You just gotta fight the bad and look for a brighter future. Not everyone or everything is gonna be sunshine and rainbows. It's gonna be bumpy and rough, you just gotta work out the kinks of it and move on.

Answer/Explanation:

The magnetic fields line are closer apart at other places. Hence, magnetic field is strongest at the poles. Magnetic Field has Direction The Magnetic Field lines are like closed curves They emerge from North Pole and Merge to South Pole.

Brainliest?!

Check out the Image below!

Answer:

A because the bigger it is the the more force needs to act apond it

Explanation:

Answer:

ur answer is correct good job

Explanation:

Answer:

Maxwell-Ampere Law

Explanation:

I took from what I remembered

Hope this helps tho <3

Answer:

4.44m/s

Explanation:

Average speed is the total distance covered within a given period of time.

From the quantities given;

Number of laps  = 4 laps

Length of each lap  = 400m

Time taken to complete race  = 6minutes

Unknown:

Average speed  = ?

Solution:

 Her average speed is given as:

      Average speed  = \(\frac{number of laps x length of lap}{time}\)

We need to convert time to seconds;

         60s  = 1 min;

        6 minute = 60 x 6  = 360s

  Average speed  = \(\frac{4 x 400}{360}\)   = 4.44m/s

The expression for the heat transfer q in such a wall is given by q = -k0 (T2 - T1)/L - βk0 (T2 - T1)T2^2/L + βk0 (T2 - T1)T1^2/L.

Given that the plane wall has a steady state of area A and thickness L.

Also, it is constructed of a material having thermal conductivity varying with the square of its temperature according to the relation

k=k0(1 + βT^2).

Therefore, the Fourier law states that

Q = -k A dT/dx

Thus, the rate of heat transfer per unit area is given by

q = -k dT/dx (i.e., Q/A = -k dT/dx)

From Fourier's law, we know that the rate of heat transfer per unit area is given by,

q = -k dT/dx

For the steady state, we have the temperature gradient as

dT/dx = (T2 - T1)/L

Also, we know that the thermal conductivity varies as the square of its temperature.

Therefore,

k = k0(1 + βT^2)

Substituting the value of the temperature gradient and thermal conductivity in the above equation, we have;

q = -k dT/dx

= -k0(1 + βT^2) (T2 - T1)/L

= -k0 (T2 - T1)/L - βk0 (T2 - T1)T2^2/L + βk0 (T2 - T1)T1^2/L

Thus, the expression for the heat transfer q in such a wall is given by

q = -k0 (T2 - T1)/L - βk0 (T2 - T1)T2^2/L + βk0 (T2 - T1)T1^2/L.

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The accelaration is 15 ms.

Acceleration (a) is the reason that  change in velocity (Δv) over to the change in time (Δt).

represented by the equation to  a = Δv/Δt. This allows you to measure how fast velocity by the  changes in meters per second squared (m/s^2).

1 . Here the change in to the  velocity is (50-20) or 30 m/s

And the time interval by to  the 5

So acceleration is 30/5 or 6 ms^-2

2. Here the change is the  (40-10) or 30 m/s in time is the  interval is 2 second

So acceleration is 30/2 or 15 ms^-2.

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The correct option is D, if some projectile lands at the same height at which it is fired  t= 2*Vo*sin \(\theta\\\)/g is the projectile's flight.

Here, yi=yi + vyt -0.5gt^2

Where, vy=v*sintheta

So, 0=(Vo*sin\(\theta\\\))*t-0.5gt^2

Hence, time, t= 2*Vo*sin \(\theta\\\)/g

A projectile is an object that is thrown, shot, or projected into the air and moves under the influence of gravity. It can be any object, including a ball, stone, bullet, or rocket, that is given an initial velocity and then continues to move freely under the influence of gravity.

Projectile motion is a type of two-dimensional motion, meaning that it can be described by the movement of the object in two perpendicular directions, typically referred to as the horizontal and vertical directions. In the absence of air resistance, the motion of a projectile is determined solely by the force of gravity acting upon it.

The trajectory of a projectile can be predicted using the equations of motion and can be visualized as a parabolic path. The maximum height reached by a projectile, its range, and the time it takes to reach the ground can be calculated using these equations.

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Complete Question: -

If some projectile lands at the same height at which it is fired (yo), how long is the projectile's flight?

A. t = 2v0 cos \(\theta\) / g B. t= Vo sin \(\theta\\\) / 9    C. x0 / V0cos\(\theta\\\)  D. t= 2V0 sin \(\theta\\\)/g

Answer:

3 m/s²

Explanation:

Take the difference between the initial speed(0) and final speed (30) and divide it by time (10).

final speed - initial speed

——_----------------------------

time.

Answer:

960 W

Explanation:

F = 800 N

x = 18 m

t = 15 s

Work = Fx= (800 N)(18 m) = 14,400 J

Power = Work / time = (14,400 J) / (15 s) = 960 W

Answer:

weight = 225 N

Explanation:

We are asked to calculate the weight of an object of mass 60 kg on Mars given that the acceleration due to gravity (g) on Mars is 3.75 m/s². We can do so using the following formula:

\(\boxed{W = mg}\),

where:

• W = weight of object in Newtons (N)

• m = mass of object in kg

• g = acceleration due to gravity in m/s².

Substituting the given data into the formula above, we can calculate the weight of the object:

W = 60 × 3.75

    = 225 N

Therefore the weight of the 60 kg object on Mars is 225 N.

Betsey will hear a frequency of 373.5 Hz.

When Jim sounds his horn with a frequency of 330 Hz, the sound waves travel toward Betsey at a certain frequency. However, since Jim is moving towards Betsey at a speed of 24 m/s, the frequency of the sound waves Betsey hears will be higher than the original frequency. This is because Betsey is essentially "catching up" to the sound waves as they are being emitted toward her. This effect is known as the Doppler Effect, which describes the change in frequency of a wave when the source or observer is in motion relative to the wave.

To calculate the frequency Betsey hears, we need to use the Doppler Effect equation, which is given as:
f' = f((v + v_o)/(v + v_s))

where f is the original frequency of the sound wave, v is the speed of sound, v_o is the velocity of the observer (Betsey in this case), and v_s is the velocity of the source (Jim in this case).

Plugging in the given values, we get:
f' = 330((343 + 0)/(343 - 24)) = 373.5 Hz

Therefore, Betsey will hear a frequency of 373.5 Hz.

Now, when Jim hears the echo of his horn reflected back to him by the cliff, the frequency of the echo will be lower than the original frequency. This is because the sound waves are now moving away from Jim, who is essentially "catching up" to them. The frequency of the echo will depend on the speed of sound and the distance between Jim and the cliff. However, since we don't have this information, we cannot calculate the frequency Jim hears for the echo from the cliff.

To answer the question of whether the frequency of the echo is greater than or equal to the frequency heard by Betsey, we can use the fact that the frequency of the echo is lower than the original frequency and compare it to the frequency Betsey hears. Since the frequency Betsey hears is higher than the original frequency, it follows that the frequency of the echo must be lower than the frequency Betsey hears. Therefore, the frequency of the echo is less than the frequency heard by Betsey.

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это действие является рективным, формула которой такова: m1×v1 = – m2×v2

m1 - масса игрока

m2 - масса шайбы

v1 - скорость игрока

v2 - скорост шайбы.

отсюда, скорост игрокa: v1 = (m2×v2):m1 = 0.092 m/s

The average speed during the 5-second interval can be determined by calculating the change in speed and dividing it by the time taken.

Initially, the car was traveling at 29 m/s, and it came to a stop, so the change in speed is 29 m/s. Therefore, the average speed can be calculated as follows:

Average speed = Change in speed / Time taken

= 29 m/s / 5 s

= 5.8 m/s

The average speed of the car during the 5-second interval when the driver slammed on the brakes and brought the car to a stop was 5.8 m/s. This is obtained by dividing the change in speed, which is 29 m/s, by the time taken, which is 5 seconds.

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Answer:

this is why the larger object has a smaller acceleration

Explanation:

According to Newton’s Second Law, when the same force is applied to two objects of different masses, the object with greater mass will experience a smaller acceleration and the object with less mass will experience a greater acceleration. .

the larger mass will also have a larger weight because of gravity

Answer:

1) The balloon will shrink

2) The balloon will grow bigger and regain its shape

Explanation:

By the kinetic theory of gases, we have;

\(v_{rms} = \sqrt{\dfrac{3 \cdot R \cdot T}{MW} }\)

\(P = \dfrac{n \cdot MW \cdot vrms^2}{3 \cdot V}\)

Where;

\(v_{rms}\) = RMS Speed

R = The universal gas constant

T = The temperature

MW = The Molecular weight

n = The number of moles

V = The volume

P = The pressure

1) When the balloon is placed in the refrigerator for  minutes, the temperature inside the balloon will drop and RMS speed will reduce, however due to the elastic wall of the balloon, the pressure will remain the same therefore the volume  will reduce and the balloon will shrink

2) When the balloon is placed on the kitchen counter, the temperature inside the balloon will rise leading to the increase in the RMS speed which will raise the pressure effect on the wall  of the balloon as the balloon is made of elastic material, as the pressure rises, the wall expands to keep the pressure constant and the volume occupied by the air particles will increase, the balloon will grow bigger and regain its shape.