An experiment gives the value of mass of the same object as 23.5 Kg in 1st attempt, 30 Kg in the second attempt, 25 kg in 3rd attempt. But the real mass of object is 28 Kg. Which of the following statement is correct about the experiment

1) experiment is precise
2) experiment is not precise

The specific heat of copper is 0.965 J/g°C. q = m*c*ΔT where q is the heat transferred, m is the mass of the substance, c is the specific heat of the substance, and ΔT is the change in temperature.

the specific heat of a substance is the amount of heat required to raise the temperature of one gram of the substance by one degree Celsius. In this case, we calculated the specific heat of copper using the amount of heat transferred when a 50 gram sample of copper was placed in cold water and experienced a temperature decrease of 25°C. By using the formula q = m*c*ΔT, we were able to calculate that the specific heat of copper is 0.965 J/g°C. This value is important in understanding how much heat energy is needed to raise the temperature of a certain amount of copper, which can have practical applications in fields such as engineering and thermodynamics.
Plugging these values into the formula, we get:
481.25 J = 50 g * c * 25°C
Solving for c, we get:
c = 0.965 J/g°C.

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Given the relationship between the physical quantities v, i, r, l, and d, if the unit of r is written as "ohm" (Ω), the values of p, q, and r can be determined. The value of p corresponds to resistance (R), q represents length (l), and r is the unknown quantity (R).

The given relationship between the physical quantities can be expressed as v = piqd^2/r. Based on this equation, we can identify the quantities and their corresponding symbols:

v represents voltage or potential difference (in volts, V).

i represents electric current (in amperes, A).

r represents resistance (unknown unit, to be determined).

l represents length (in meters, m).

d represents distance (in meters, m).

If we write the unit of r as "ohm" (Ω), we can equate the unit of resistance (R) with r. Therefore, p corresponds to resistance (R), q represents length (l), and r is the unknown quantity (R).

In summary, if the unit of r is written as "ohm" (Ω), the values of p, q, and r in the given relationship are resistance (R), length (l), and the unknown quantity (R), respectively.

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Answer:

Em are waves that are created as a result of vibrations between an electric field and a magnetic field.

Explanation:

Answer:

Electromagnetic waves or EM waves are waves that are created as a result of vibrations between an electric field and a magnetic field. In other words, EM waves are composed of oscillating magnetic and electric fields.

A changing magnetic field will induce a changing electric field and vice-versa the two are linked. These changing fields form electromagnetic waves.This means that electromagnetic waves can travel not only through air and solid materials, but also through the vacuum of space.

Fun fact - The first oranges weren’t orange

The original oranges from Southeast Asia were a tangerine-pomelo hybrid, and they were actually green. In fact, oranges in warmer regions like Vietnam and Thailand still stay green through maturity.

The NTFS (New Technology File System) is the file system that supports encryption, compression, and the use of volumes.

NTFS is the default file system used by modern Windows operating systems. It provides several advanced features, including support for file and folder-level encryption through the use of the Encrypting File System (EFS). With EFS, users can encrypt individual files or directories to protect their data from unauthorized access.

NTFS also includes built-in file compression capabilities. It allows users to compress files and directories to save disk space, especially for large files or folders that are not frequently accessed.

Furthermore, NTFS supports the creation and management of volumes, which are logical partitions or storage units within a physical disk. Users can create multiple volumes, format them with NTFS, and manage them independently, providing enhanced organization and flexibility for file storage.

NTFS is a robust and feature-rich file system that supports encryption, compression, and the use of volumes, making it a suitable choice for various applications and environments.

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Answer:

The second type of body wave is the S wave or secondary wave, which is the second wave you feel in an earthquake. An S wave is slower than a P wave and can only move through solid rock, not through any liquid medium.

________________________________

Answer:

(A.) it is true

Explanation:

the stop strategy

1. State the situation or problem.

2.Tell the person what you want.

3.Offer an opportunity to respond.

4.Provide closure (review, summary, or thanks).

could help you explain the situation to your peer

The EMF induced in the coil 28.2 millivolts.

The induced EMF in a coil is given by the rate of change of the magnetic flux in the coil.

So, we can write the relation,

E = -NdM/dt

Where M is the magnetic flux and N is the number of turns in the coil while E is the EMF induced in the coil,

E = -NA∆B/∆t

∆B is the change in magnetic field,

A is the area of the coil,

The diameter of the wire is 3 cm turns in the coil is 8 the magnetic field change from 75 Milli Tesla to 25 milli Tesla in 0.05 seconds.

Now putting all the values accordingly,

E = -800π(3/200)²(50/10³)/0.05

E = -28.2mV

So, the EMF induced in the coil is 28.2 millivolts. The negative sign here indicates that the EMF is produced in the opposite nature.

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Answer:

I will answer in English, and i will give some representation for each case:

We have a = 6m and b = 8m.

If they are perpendicular, we have that:

a = (6m, 0) b = (0, 8m)

The adition is:

a + b = (6m, 8m).

If they are parallel, we have;

a = (6m, 0)

b = (8m, 0)

a + b = (6m + 8m, 0) = (14m, 0 )

If they are parallel but opposite:

a = (6m, 0)

b = (-8m, 0)

a + b = (6m - 8m,0) = (-2m, 0)

Answer:

6 cm

Explanation:

When 4 cm from the mirror the image is 4 cm behind the mirror.  

When the mirror is moved 1 cm towards the man the man is now 3 cm from the mirror and his image is also 3 cm from the mirror.

Thus the distance between the man and his image is now 3+3 = 6 cm.

Answer:

I think u are traeling at speed of light and not ur friend

Explanation:

2. change the amount of electric current

Answer:

Acceleration

Explanation:

Answer:

The energy of a photon of light with a wavelength of 500 nm is approximately 2.482 electron volts (eV).

Explanation:

To calculate the energy of a photon of light with a given wavelength, we can use the equation:

Energy = (Planck's constant * Speed of light) / Wavelength

Given:

Wavelength (λ) = 500 nm = 500 × 10^(-9) meters (converting from nanometers to meters)

Planck's constant (h) = 6.626 × 10^(-34) J·s (Joule-seconds)

Speed of light (c) = 3 × 10^8 m/s (meters per second)

Substituting the values into the equation:

Energy = (6.626 × 10^(-34) J·s * 3 × 10^8 m/s) / (500 × 10^(-9) m)

Simplifying the expression:

Energy = (6.626 × 3 × 10^(-26)) / 500

Calculating the result:

Energy ≈ 3.975 × 10^(-19) J

Now, to convert the energy from joules to electron volts (eV), we can use the conversion factor:

1 eV = 1.602 × 10^(-19) J

Converting the energy from joules to eV:

Energy (eV) = (3.975 × 10^(-19) J) / (1.602 × 10^(-19) J/eV)

Simplifying the expression:

Energy (eV) ≈ 2.482 eV

Therefore, the energy of a photon of light with a wavelength of 500 nm is approximately 2.482 electron volts (eV).

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About 400.00 Meters per second.

(Think i may have gotten my decimal in the wrong place. If not then 4)

Answer:

14.40 km/h (kilometers per hour)

240.00 m/min (meters per minute)

Best answer: 4.00 m/s (meters per second)

Explanation:

The internal resistance of an automobile battery was found to be 2.2Ω

Explain about resistance ?

Resistance is a measure of an electrical circuit's resistance to current flow. Resistance is measured in ohms, which is represented by the Greek letter omega (Ω). Ohms are named after German scientist Georg Simon Ohm (1784-1854), who researched the link between voltage, current, and resistance. He is credited for developing Ohm's Law.

Electrical resistance is a barrier to current flow in a circuit.

While driving to a particular spot with your family, you may have noticed that when your driver encounters an impediment on the road, he slows down the automobile.

v=25.0v

emf=8.5v

current=7.5

Vint=16.5v

v=IRint

16.5=7.5(Rint)

=2.2 Ω

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The frequency range of UVA is approximately 7.5 x 1\(0^{14}\) Hz to 9.4 x 1\(0^{14}\) Hz.

To find the frequency range of UVA, we can use the formula:

Frequency = Speed of light / Wavelength

The speed of light is approximately 3.00 x 1\(0^8}\)  meters per second.

Minimum frequency of UVA:

Frequency = (3.00 x 1\(0^8}\)  m/s) / (400 x 1\(0^{-9}\) m) ≈ 7.5 x 1\(0^{14}\)  Hz

Maximum frequency of UVA:

Frequency = (3.00 x 1\(0^8}\) m/s) / (320 x 1\(0^{-9}\) m) ≈ 9.4 x 1\(0^{14}\)  Hz

Therefore, the frequency range of UVA is approximately 7.5 x 1\(0^{14}\)  Hz to 9.4 x 1\(0^{14}\) Hz.

Expressing it numerically separated by a comma, the range is 7.5 x 1\(0^{14}\)  Hz, 9.4 x 1\(0^{14}\) Hz.

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Answer:

58.933195 u or 59 u

Explanation:

Atomic mass of cobalt is 58.933195 u

The kind of circuit that connects the devices is a series circuit. In a series circuit, the current through each device is the same and the total circuit current is divided equally among the devices. However, in this case, the current through each device is only one-fourth of the total circuit current, indicating that there may be some resistance or impedance in the circuit.

The given information suggests that the devices are connected in a parallel circuit. In a parallel circuit, the components are connected across each other with multiple branches, and each branch receives the same voltage. The current flowing through each branch is determined by the individual resistance of the branch. In this case, the current through each device is one-fourth of the circuit current, indicating that the current is evenly divided among the devices in parallel. This happens because the devices have the same voltage across them but different resistances, causing different amounts of current to flow through them. Therefore, the parallel circuit configuration is the most suitable for connecting these devices as it allows each device to function independently and draw its required current without affecting the other devices.

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Answer:

try this

Explanation:

The energy of a falling object when it hits the ground is equaled to the energy it starts with because the potential energy is converted into kinetic energy entirely with the height at 0. This means the energy would be 200 J.

RESULT

The speed of the large cart after the collision would be 0.087 m/s

We can use the law of conservation of momentum to solve this problem, which states that the total momentum of a closed system remains constant before and after a collision.

The momentum before the collision is given by:

p1 = m1v1 + m2v2

where m1 = 0.2 kg is the mass of the small cart, v1 = 1.70 m/s is its velocity before the collision, m2 = 2.00 kg is the mass of the large cart, and v2 = 0 m/s is its velocity before the collision.

p1 = (0.2 kg)(1.70 m/s) + (2.00 kg)(0 m/s) = 0.34 kg m/s

The momentum after the collision is also given by:

p2 = m1v1' + m2v2'

where v1' = -0.830 m/s is the velocity of the small cart after the collision (since it recoils in the opposite direction), and we want to find v2', the velocity of the large cart after the collision.

p2 = (0.2 kg)(-0.830 m/s) + (2.00 kg)(v2')

Since momentum is conserved, we have:

p1 = p2

0.34 kg m/s = (0.2 kg)(-0.830 m/s) + (2.00 kg)(v2')

Solving for v2', we get:

v2' = (0.34 kg m/s - 0.166 kg m/s) / 2.00 kg

v2' = 0.087 m/s

Therefore, the speed of the large cart after the collision is 0.087 m/s, to three significant figures.

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Answer:

ya daddy is my zaddy

Explanation:

To find the Fourier transform, integrate the windowed sinusoidal signal and plot its frequency components.

To find and plot the Fourier transform of the windowed sinusoidal signals, let's consider each case separately:

a) For the signal \(X(t) = S*cos(10t)\),

where the time domain is restricted to -10 < t < 10, we can apply the Fourier transform to obtain its frequency domain representation.

The Fourier transform of X(t) can be calculated as follows:

\(X(f) = (1/2\pi ) * \int\[(-10) to (10)] X(t) * e^{(-j2\pi ft) dt\)

Substituting X(t) = S*cos(10t) into the equation, we get:

\(X(f) = (1/2\pi ) * \int\[(-10) to (10)] S*cos(10t) * e^{(-j2\pi ft) dt\)

Using trigonometric identities, we can simplify the expression further.

After evaluating the integral, we obtain the Fourier transform X(f) in the frequency domain.

b) For the signal \(x(t) = S*cos(10t),\)

where x(t) is zero outside the given time interval, the Fourier transform of x(t) can be determined similarly by applying the Fourier transform formula.

However, since x(t) is zero outside the interval, the Fourier transform will be nonzero only for frequencies within the range of the cosine function.

Therefore, the frequency domain representation will have a spike at f = 10 Hz with a magnitude of S/2π.

To plot the Fourier transform, we can plot the magnitude or the magnitude and phase of X(f) against the frequency f.

The resulting plot will show the frequency components present in the windowed sinusoidal signal.

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Answer:

Yes

Explanation:

The wavelength of the laser is 19.4 nm and the average power delivered to the eye during a pulse is  50000 W.

(a) The energy of a laser pulse in terms of number of photons is =

= E = N X (hc / λ)

Where,

λ = wavelength

N = Number of photons in each laser pulse

h = Planck constant

c = Speed of light

We need to find the wavelength, then re-arrange the equation

= λ = N X (hc / E)

Converting the unit the energy from J to eV, we have,

= E = 1 X 10⁻³ [ 1 eV / 1.6 X 10⁻¹⁹ ]

= E = 6.25 X 10¹⁵ eV

Replacing,

= λ = N X (hc / E)

= λ = [ ( 9.7 X 10¹⁴ X 4.136 X 10⁻¹⁵ X 3 X 10⁸ ) /  6.25 X 10¹⁵ ]

= λ = 19.4 nm

(b) Energy = E = 1 mJ

Time = t = 20 ns

Thus, average power = p =

= p = E/t

= p = 1 X 10⁻³ / 20 X 10⁻⁹

= p = 0.05 X 10⁶

= p = 50000 W

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The true statement about kinetic molecular theory is that the collisions of particles with one another are completely elastic. This means that when gas particles collide with each other, no kinetic energy is lost and they bounce off each other with the same energy they had before the collision. This is one of the basic assumptions of kinetic molecular theory. The other statements are not true according to kinetic molecular theory.

For example, the size of gas particles is assumed to be negligible compared to the volume they occupy, and the average kinetic energy of a particle is directly proportional to the temperature. Additionally, gas particles are assumed to have weak or negligible attractions to each other.

a) A single particle does not move in a straight line.
b) The size of the particle is large compared to the volume.
c) The collisions of particles with one another are completely elastic.
d) The average kinetic energy of a particle is not proportional to the temperature.
e) Gas particles are very attracted to each other.

The collisions of particles with one another are completely elastic. This is a key principle of the kinetic molecular theory, which states that when gas particles collide with each other or the container walls, the collisions are elastic, meaning no kinetic energy is lost during the collision.

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Answer:

d. it will be replaced by a new theory if enough evidence is collected.

Explanation:

i think

the required equation for centripetal force is F = k m¹ v¹ r⁻¹.

A particle traveling uniformly in a circle experiences a centripetal force, F, which is dependent on the mass (m), velocity (v), and radius (r) of the circle.

the F formula using the dimensions method is

Suppose F = k mᵃvᵇrⁿ. (i)

Where a, b, and n are the respective powers of m, v, and r and k is the dimensionless constant of proportionality.

Upon putting the measurements of various amounts in (i)

we get

[M¹L¹T‐²] = Mᵃ[LT‐¹]ᵇ Lⁿ

=> [M¹L¹T‐²] = Mᵃ Lᵇ Lⁿ T⁻ᵇ

=> [M¹L¹T-²] = Mᵃ Lᵇ⁺ⁿ T⁻ᵇ

on comparing both sides we get

a = 1

b+n = 1

-b = -2 => b = 2

Then n = -1

Onputting these values in (i),

we get

F = k m¹ v¹ r⁻¹

Or

F=k(mv²)/r

This is the required equation for centripetal force.

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Answer:

the branch currents are as follows:

  top left: I2 = 0.625 A

  middle left: I1 = 2.500 A

  bottom left: I1-I2 = 1.875 A

  top center: I2+I3 = 2.500 A

  bottom center: I2+I3-I1 = 0 A

  right: I3 = 1.875 A

Explanation:

You can write the KVL equations:

Top left loop:

  I2(4) +(I2 +I3)(2) +I1(1) = 10

Bottom left loop:

  (I1-I2)(4) +(I1-I2-I3)(2) +I1(1) = 10

Right loop:

  (I2+I3)(2) +(I2+I3-I1)(2) = 5

In matrix form, the equations are ...

  \(\left[\begin{array}{ccc}1&6&2\\7&-6&-2\\-2&4&4\end{array}\right]\cdot\left[\begin{array}{c}I_1\\I_2\\I_3\end{array}\right] =\left[\begin{array}{c}10\\10\\5\end{array}\right]\)

These equations have the solution ...

  \(\left[\begin{array}{c}I_1\\I_2\\I_3\end{array}\right] =\left[\begin{array}{c}2.500\\0.625\\1.875\end{array}\right]\)

This means the branch currents are as follows:

  top left: I2 = 0.625 A

  middle left: I1 = 2.500 A

  bottom left: I1-I2 = 1.875 A

  top center: I2+I3 = 2.500 A

  bottom center: I2+I3-I1 = 0 A

  right: I3 = 1.875 A

_____

This can be worked almost in your head by using the superposition theorem. When the 5V source is shorted, the 10V source is supplying (I1) to a circuit that is the 4 Ω and 2 Ω resistors in parallel with their counterparts, and that 2+1 Ω combination in series with 1 Ω for a total of a 4Ω load on the 10 V source. That is, I1 due to the 10V source is 2.5 A, and it is nominally split in half through the upper and lower branches of the circuit. There is no current flowing through the (shorted) 5 V source branch.

When the 10V source is shorted, the 5V source is supplying a 4 +4 Ω branch in parallel with a 2 +2 Ω branch, a total load of 8/3 Ω. This makes the current from that source (I3) be 5/(8/3) = 15/8 = 1.875 A. There is zero current from this source through the 1 Ω resistor.

Nominally, the current from the 5V source splits 2/3 through the 2 Ω branch and 1/3 through the 4 Ω branch.

Using superposition, I2 = I1/2 -I3/3 = (2.5 A/2) -(1/3)(15/8 A) = 0.625 A. This is the same answer as above, without any matrix math.

  (I1, I2, I3) = (2.5 A, 0.625 A, 1.875 A)

__

It helps to be familiar with the formulas for resistors in series and parallel.