i am having trouble with writing a 2 paragraph summary about this vidio can someone help me
Picture of the Big Bang (a.k.a. Oldest Light in the Universe)

(a) The instantaneous source voltage can be determined by using the given magnitude and phase angle. Since the phase angle is 0°, the instantaneous source voltage can be written as:

V(t) = 277 * cos(2π * 60 * t)

(b) For a 30-Ω resistor, the current entering the positive terminal is the same as the source current. Since the voltage and resistance are given, we can use Ohm's law to determine the current:

I(t) = V(t) / R = (277 * cos(2π * 60 * t)) / 30

(c) For a 15-mH inductor, the phasor current can be determined using the formula:

I = V / jωL

where j is the imaginary unit (√(-1)), ω is the angular frequency (2π * frequency), and L is the inductance. In this case, ω = 2π * 60 and L = 15 * 10^(-3):

I = (277 ∠0°) / (j * 2π * 60 * 15 * 10^(-3))

To find the instantaneous current, we can take the real part of the phasor current and then convert it to the time-domain using cosine function:

I(t) = Re(I * e^(jωt))

(d) For a capacitor with 100 mF, the phasor current can be determined using the formula:

I = jωCV

where C is the capacitance. In this case, ω = 2π * 60 and C = 100 * 10^(-3):

I = (j * 2π * 60 * 100 * 10^(-3)) * 277 ∠0°

To find the instantaneous current, we can take the imaginary part of the phasor current and then convert it to the time-domain using sine function:

I(t) = Im(I * e^(jωt))

Answer:

down below

Explanation:

for a scale, kg is used, as well as grams

for force, newtons is used

Answer:

Sorry I'm wrong The person above is correct.

I tried.

Answer:

The net force on the brick is 0N and the brick remains at rest.

Explanation:

Net force = 5N - 5N

= 0N

the first one answer is speed and the second one is direction.

Answer:

1. Slope of distance time graph gives Speed in the case of uniform motion

2.The magnitude of velocity and Displacement will be equal if motion is along a straight path

Explanation:

PLEASE MARK BRAINLEST

Answer:

check explanation

Explanation:

Whenever we talk about velocity ,it means that we r telling them the speed of the object+the direction of the motion of object but here direction isn't mentioned. That's the fault in the statement

Answer:the sample of solid has less energy than the sample of gas

Explanation:

Apex

Based on the Radioactive Decay chart in the reading,  Plutonium is the element that  would emit destructive radioactive material, therefore the correct answer is option A

This radiation is released when a nucleus undergoes radioactive decay and transforms into a different isotope that may be radioactive (unstable) or non-radioactive depending on the number of neutrons and protons in the nucleus (stable).in other words one can say The ability of some unstable atoms to emit nuclear radiation spontaneously

Thus, Plutonium is the element that would emit destructive radioactive material, according to the radioactive decay chart in the reading, so option A is the appropriate response.

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The composite beam is supported by a roller at A, pin attached at B, and fastened at C. (See pic). The sheer and moment diagrams' figures are included.

At the intersection of "A" and "B," the shear force remains constant. in the Shear diagram, the first incline plane.

Linear shifts in shearing force are present between "B" and "C." The bending moment diagram thus reveals the parabolic shape.

The moment is 0 at point "B."

By calculating the shear force and bending moment at a specific place on a structural element, such as a beam, shear and bending moment diagrams are analytical approaches that are used in conjunction with structural analysis to help structural design.

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Explanation:

The speed of light in air is approximately 300,000,000 meters per second. The speed of sound in air is approximately 343 meters per second. Light is the propagation of electromagnetic waves, while sound is the physical vibration of the medium

Cells that innervate neuromuscular junctions originate from the central nervous system (CNS).

The central nervous system (CNS) is one of the two main parts of the nervous system, with the other being the peripheral nervous system (PNS). The CNS consists of the brain and spinal cord, which are responsible for receiving, processing, and sending information throughout the body.

The brain is the control center of the body and is responsible for cognitive functions such as thinking, memory, and decision-making. The spinal cord is responsible for transmitting information between the brain and the rest of the body, and for controlling reflexes.

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Answer:

I think it might be box 1. Hope this is right have a good day

me lo traduses plis no se ingles solo escribe lo que dice en la guia

Answer:

Josie's ball faster than T

The change of kinetic energy is -156.7 joules.

\(V1_{i}\) =15

\(V2_{i}\)= -13.5(as towards left)

V= common velocity during collision

On applying momentum conservation during the collision

\(m_{1}V1_{i} + m_{2}V2_{i} = V ( m_{1} + m_{2})\)

\(0.650 \ 15 + 0.950 \ (-13.5) = (0.625 + 0.950) \ V\)

    \(\frac{3.075}{1.6}\) =V

V= -1.92 m/s        

To kind change in kinetic energy we will subtract final and initial kinetic energy

ΔK=\(\frac{1\ (m_{1} + m_{2} ) \ V}{2} ^{2}\) - \(\frac{1\ (m_{1} ) \ V1_{i} }{2} ^{2}\)  -  \(\frac{1\ (m_{2} ) \ V2_{i} }{2} ^{2}\)

ΔK= \(\frac{1\ (0.625 + 0.950 ) \ (-13.5)}{2} ^{2}\) -  \(\frac{1\ (0.625 ) \ 15 }{2} ^{2}\)-  \(\frac{1\ (0.950 ) \ 13.5 }{2} ^{2}\)

ΔK=   = - 156.7 J

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Answer:

15

Explanation:

distance = speed × time.

Answer: A motionless object can have energy. The energy that the object has is called potential energy.

Explanation:

The normal force felt by the box has magnitude

F[normal] = (1 kg) g = 9.8 N

so that the maximum magnitude of static friction is

F[s. friction] = 0.8 F[normal] = 7.84 N

In order to get the box to move, (C) a minimum force of 7.84 N is required.

Answer:

A 70 kg box is slid along the floor by a 400 n force. The coefficient of friction between the box and the floor is 0. 50 when the box is sliding

The final speed of the electron, denoted as \($v_{\text{final}}$\), when it is 10.0 cm away from charge 1 can be calculated using the principles of electrostatics.

The initial position of the electron is at the midpoint between the two charges. We know that the charges are positive and stationary. Therefore, the electric field produced by charge 1 points towards charge 2. As the electron is negatively charged, it will experience a force in the opposite direction, i.e., towards charge 1. This force will cause the electron to accelerate.

To calculate \($v_{\text{final}}$\), we can use the conservation of energy. Initially, the electron is at rest, so its initial kinetic energy is zero. The final kinetic energy is given by \(\frac{1}{2mv^2_{final}}\), where m is the mass of the electron. The change in potential energy is given by \($q\Delta V$\), where q is the charge of the electron and \($\Delta V$\) is the change in electric potential.

The change in potential energy can be calculated by considering the electric potential at the midpoint and at a point 10.0 cm from charge 1. The electric potential at a point due to a point charge is given by \($V = \frac{kq}{r}$\), where k is the electrostatic constant, q is the charge, and r is the distance from the charge. By considering the signs and magnitudes of the charges, we can determine the change in potential energy.

By equating the initial kinetic energy to the change in potential energy, we can solve for \($v_{\text{final}}$\). The mass of an electron is known, and the values for the charges and distances are provided in the problem. Converting the given values to SI units (coulombs and meters), we can perform the necessary calculations to find the final speed of the electron.

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We will have the following:

First, we remember that:

So:

So, the change in length of the rod is approximately 4.41 mm.

Answer: Wave a the first answer is right

Brainliest.

Explanation:

The specific latent heat of vaporization of water is 2300 kj/kg.

What is the specific latent heat of vapourization?

Specific latent heat of vapourization is the quantity of heat required to convert unit mass of a substance from liquid to vapour state without change of temperature.

We have...

Q = heat energy = 69 kj

m = mass = 0.030 kg

L = Specific heat

The formula is given by:

Q = mL

L = Q / m

L = 69 / 0.030

L = 2300 kj / kg

The nickel must be placed at a distance of 2.96 meters from your eyes, in order to have the same angular size of the moon.

We can determine the distance at which the nickel must be placed in order to have the same angular size by using the tangent of the angle as before, where the adjacent is the distance between your eyes and the nickel, so we have, knowing the angular size, and knowing the diameter of the penny "the opposite".

The diameter of a nickel is 21 mm = 21 x 10⁻³

(21 x 10⁻³ / adj) = tan 9.037 x 10⁻³

adj = (21 x 10⁻³) / (tan 9.037 x 10⁻³)

= 2.96 m

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The statement "An independent-measures study has m1 = 49 and m2 = 45 with an estimated standard error of this study, cohen’s d = 4/4 = 1.00" is false.

Cohen's d is not calculated by dividing the difference in means by the estimated standard error. Cohen's d is calculated by dividing the difference in means by the pooled standard deviation.

To calculate Cohen's d, the formula is:

\(d = \frac{M_1 - M_2}{SD_{\text{pooled}}}\)

where M1 and M2 are the means of the two independent groups and \({SD_{\text{pooled}}}\) is the pooled standard deviation. The pooled standard deviation takes into account the sample sizes and standard deviations of both groups.

Without the sample sizes or the standard deviations of the two groups, it is not possible to determine the correct value of Cohen's d or whether the statement is true or false.

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Only about 0.01% of the incident x-rays make it through this part of the arm.To solve this problem, we need to use the table of x-ray absorptions to determine the absorption coefficients of muscle and bone at the energy of the x-rays used by the machine. Let's assume that the x-rays have an energy of 50 keV, which is typical for medical imaging.

According to the table, the absorption coefficient for muscle at 50 keV is 0.2 cm^2/g, and the absorption coefficient for bone is 1.3 cm^2/g. We also know the thicknesses of the muscle and bone through which the x-rays must pass: 3.4 cm of muscle, 3.3 cm of bone, and 3.2 cm more of muscle.

To calculate the fraction of incident x-rays that get through this part of the arm, we can use the Beer-Lambert law, which states that the intensity of the x-rays decreases exponentially as they pass through a material:

I = I0 * e^(-mu*x)

where I is the intensity of the x-rays after passing through a thickness x of material, I0 is the initial intensity of the x-rays, mu is the absorption coefficient of the material at the energy of the x-rays, and e is the base of the natural logarithm.

Using this equation, we can calculate the fraction of incident x-rays that get through each layer of the arm:

For the first layer of muscle:

I1 = I0 * e^(-0.2*3.4) = 0.306 * I0

For the layer of bone:

I2 = I1 * e^(-1.3*3.3) = 0.00054 * I0

For the second layer of muscle:

I3 = I2 * e^(-0.2*3.2) = 0.000104 * I0

Therefore, the fraction of incident x-rays that get through this part of the arm is:

I3 / I0 = 0.000104

In other words, only about 0.01% of the incident x-rays make it through this part of the arm. This is because the bone absorbs most of the x-rays due to its higher density and higher absorption coefficient.

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By using the RAMP acronym, the students can examine and manage the risks connected with their diluting concentrated acid approach, resulting in a safer and more regulated experimental process.

To assess the risk of their planned procedure using the RAMP acronym, the best assessment for each letter would be as follows:

R - Recognize hazards: The students should identify and acknowledge any potential hazards associated with diluting concentrated acid.

A - Assess risks: The students should evaluate the risks associated with the procedure. This involves considering the probability and potential consequences of accidents or mishaps, such as acid splashes, improper handling, or inhalation of fumes.

M - Minimize risks: The students should take measures to minimize the identified risks. This includes implementing safety protocols and precautions.

P - Prepare for emergencies: The students should be prepared to respond to any potential emergencies or accidents that may occur during the procedure.

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The statement illustrates how engineering has influenced society in that People want the cameras in their cell phones to be able to capture high-resolution images. Option C is corect.

A digital camera that creates pictures that can be saved on a computer and seen on a screen.

People want their mobile phone cameras to be able to take high-resolution pictures, which shows how engineering has affected society.

Statement B illustrates how engineering has influenced society.

Hence option C is correct.

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Answer:

9×1/2×10=45J

Explanation:

\(w = f \times d \times \cot( \beta ) \)

f=9N

d=10m

cos(B)=1/2

When the velocity of a particle moving along an axis is known, the instantaneous acceleration equal to zero is given as 0.6t.

We estimate the average speed between two places in time separated by t while allowing t to decrease. The outcome is the velocity function's derivative, v. (t).

The slope of the tangent line to the graph at any given location on the graph corresponds to the instantaneous acceleration there. The instantaneous acceleration of the particle is equal to 0 when this line is horizontal and has a slope of 0. According to the plot, these times correlate to the velocity function's extrema, which can be found at t = 1.75, 2.75, 3.25, and for all t = 4.

t = 0.6 is the most likely choice.

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Answer:

C

Explanation: