X Prob set #3 CMP1 [Due: May 25, 2022 (Wed)] 1. Consider electrons under a weak periodic potential in a one-dimension with the lattice constant a. (a) Calculate the average velocity of the electron wi

The rate at which work is completed is indicated by the power word, hence option b is correct. Power, which can be defined as the amount of work done W.

Is the time rate at which the job is completed or energy is given. Energy transferred, expressed as W/t or energy transferred against the time interval t. Work (or energy) per unit time, foot-pounds per minute, joules per second (or watts), and ergs per second are all ways to express power. Work is defined as involving both force applied to the body and displacement of the body. Consider a block that is resting on a horizontal, frictionless floor. A consistent force is acting on this block.

Learn more about force here

https://brainly.com/question/13191643

#SPJ4

Answer:  B.) power

Explanation: Get dem hearts up:)

Answer:

The answer is Muscular endurance

Explanation:

It is this because your seeing how long your muscles can with stand. I answered by guessing lol.

Answer:

Explanation:

In the decibel scale , intensity of sound changes logarithmically as follows

\(10log\frac{I}{I_0} =\) Value in decibel scale , the value of I₀ = 10⁻¹² W /m².

Putting the values

\(10log\frac{I}{10^{-12}} = 71\)

\(log\frac{I}{10^{-12}} = 7.1\)

\(\frac{I}{10^{-12}} = 10^{7.1}\)

\(I= 10^{-4.9}\) W/m²

Similarly for 54 dB sound intensity can be given as follows

I = 10⁻¹² x \(10^{5.4}\)

\(I= 10^{-6.6 }\) W / m²

For intensity of sound the relation is as follows

I = 2π²υ²A²ρc where υ is frequency , A is amplitude , ρ is density of air and c is velocity of sound .

Putting the given values for 71 dB

\(I= 10^{-4.9}\)  = 2π² x 504²xA²x 1.21 x  346

A² = 60.03 x 10⁻¹⁶

A = 7.74 x 10⁻⁸ m

For 54 dB sound

\(10^{-6.6}\) = 2π² x 504²xA²x 1.21 x  346

A² = 1.1978 x 10⁻¹⁶

A = 1.1 x 10⁻⁸ m

Answer:

Accuracy reduces on the rates of errors

Explanation:

\(.\)

If higher-frequency standing wave in the cavity produces nodal planes with a spacing of 1.25 cm, the distance L between the walls of the cavity is 7.5cm.

The general formula for both ends closed is (n+1) λ/2

Let's say for n, \(\frac{\pi }{2} n = 1.5 = \pi = 3cm\)

for (n+1), λ(n+1)/2 = 1.25 = λ(n+1) = 2.5cm

∴ (n+1) (1.5) = (n+2)(1.25) = n = 4

∴  L = (4+1)(3/2) = L = 7.5cm.  

Electromagnetic waves, or EM waves, are waves produced by oscillations between electric and magnetic fields. In other words, EM waves consist of oscillating magnetic and electric fields. Gamma rays have the highest frequencies in the electromagnetic spectrum.

Most sunrise alarm clocks are yellow to simulate the brightness of the sun. This energizing color is the color your body naturally associates with the morning. Colors like purple and red are often used for simulating the sunset and may be more conducive to falling asleep.

Learn more about An electromagnetic wave here:-https://brainly.com/question/13874687

#SPJ4

Answer:

Absolute strength = 1.25

Explanation:

Given:

Body weight of body = 120 lbs

Body weight of thing = 150 lbs

Find:

Absolute strength

Computation:

Absolute strength = Body weight of thing / Body weight of body

Absolute strength = 150 / 120

Absolute strength = 1.25

The  cart will move 32.9 meters in 4.3 seconds, starting from rest, if the shopper places an 88 N child in the cart.

a) Disregarding friction, we can use the equation:

distance = (1/2) * acceleration * time^2

where acceleration is the net force divided by the mass of the cart:

acceleration = force_net / mass

In this case, the net force is the horizontal force applied by the shopper:

force_net = 15 N

And the mass of the cart is given as 31 kg. Therefore:

acceleration = 15 N / 31 kg = 0.48 m/s^2

Plugging this into the distance equation, we get:

distance = (1/2) * 0.48 m/s^2 * (4.3 s)^2 = 4.6 meters

Therefore, the cart will move 4.6 meters in 4.3 seconds, starting from rest, if we disregard friction.

b) If the shopper places an 88 N child in the cart, the net force applied by the shopper will be:

force_net = 15 N + 88 N = 103 N

Using the same equation as before, the acceleration of the cart is:

acceleration = 103 N / 31 kg = 3.32 m/s^2

Plugging this into the distance equation, we get:

distance = (1/2) * 3.32 m/s^2 * (4.3 s)^2 = 32.9 meters

Therefore, the cart will move 32.9 meters in 4.3 seconds, starting from rest, if the shopper places an 88 N child in the cart.

Visit to know more about Rest:-

brainly.com/question/30191671

#SPJ11

Answer: The ability to do work.

Explanation: Scientists define energy as the ability to do work. There is potential energy (where an object at rest has the capacity to have motion) and kinetic energy (where an object is in motion).

Wave B has a greater wavelength. Option B is correct.

The frequency and wavelength of a wave are inversely proportional to each other. Mathematically, the relationship between the two is given by the equation:

where c is the speed of light, λ is the wavelength, and f is the frequency of the wave.

Since light wave A has a greater frequency than light wave B, we can conclude that light wave B has a greater wavelength than light wave A. This is because as the frequency increases, the wavelength decreases, and as the frequency decreases, the wavelength increases. Therefore, if two waves have different frequencies, the one with the lower frequency will have a greater wavelength. Hence Option B is correct.

To learn more about wavelength, here

https://brainly.com/question/31143857

#SPJ1

An induction motor cannot operate at synchronous speed because the relative motion between the stator magnetic field and the rotor conductors is necessary for the induction of current in the rotor.

In an induction motor, the stator creates a rotating magnetic field that interacts with the rotor conductors, inducing current in them. This induced current in the rotor creates a magnetic field that opposes the stator's magnetic field, resulting in rotor motion.

The speed at which the rotor rotates is slightly less than the synchronous speed, which is the speed of the rotating magnetic field.

If an induction motor were to operate at synchronous speed, the relative motion between the stator magnetic field and the rotor conductors would be zero.

This would eliminate the change in magnetic flux linking the rotor conductors, and as a result, no current would be induced in the rotor. Without the induced current, there would be no opposing magnetic field in the rotor, and therefore no torque generated to sustain rotation. Thus, an induction motor cannot operate at synchronous speed.

To learn more about induction motor click here: brainly.com/question/30515105

#SPJ11

The direction of their vector sum is 92.51.

Finding the angle that the resultant creates with either the north-south or the east-west vector will reveal the direction of the resultant. The resultant makes an angle with west at a value of theta.

Thus, the length of the first vector G in a -35 degree direction is 40.3 m.

Let's locate the elements of G.

\(G_{x}\) = 40.3 cos (-35) = 33.018

\(G_{y}\) = 40.3 sin(-35) = -23.1151

The length of the second vector, H, is 63.3 m in the direction of 270.

\(H_{x}\) = 63.3 cos(270) = 0

\(H_{y}\) = 63.3 sin(270) = -63.3

The corresponding components can be combined to find the resultant vector:

\(R_{x} = G_{x}+H_{x}\) = 33.018+0 = 33.018

\(R_{y} = G_{y} +H_{y}\) = -23.1151+(- 63.3) = -86.4151.

To find the magnitude of (\(R_{x}, R_{y}\))  which is given by the formula \(\sqrt{R^{2} _{x} +R^{2} _{y} }\)

\(\sqrt{33.018+ (-86.4151)}\) = \(\sqrt{8557.34844}\) = 92.51.

To know more about vector addition's direction visit:

https://brainly.com/question/12979718

#SPJ4

Answer:

(a) - \(R_{eq.}=8 \ \Omega\)

(b) - \(I_1=3 \ A, \ I_2= 1.8 \ A, \ I_3=1.2 \ A\)

(c) - \(\Delta V_1=6 \ V, \ \Delta V_2= 18\ V, \ \Delta V_3= 18 \ V\)

Conceptual:

Things to know about parallel/series resistors:

A resistor takes electrical energy and converts it to some other form of energy, such as heat. In doing so this can alter a circuit's current and divide voltages.

Electrical current is the flow of charged particles.

To put it simply, voltage is what "pushes" current through a circuit.

\(\boxed{\left\begin{array}{ccc}\text{\underline{Ohm's Law:}}\\\\\Delta V=IR\end{array}\right}\)

How you should tackle these types of problems:

I recommend combining resistors until you have one resistor. This one resistor is what your total resistance is, which I call the equivalent resistor. Then work backwards from the equivalent resistor to find any information you need, utilizing Ohm's law and properties of parallel/series resistors.

Step-by-step:

Refer to the attached image(s).

Using two circular, flat, clear plastic circles that he attaches at the edges, Camden creates a model of a double convex lens that appears thicker in the center and thinner at the edges.

Bi-convex (Double-convex) lenses focus parallel light rays to a single point similarly to plano-convex lenses because they have the same radius of curvature on both sides of the lens. As a general rule, bi-convex lenses work best with conjugate ratios between 5:1 and 1:5.

By twice refractively (bending) the light rays from a distant object, a double convex lens, also known as a converging lens, concentrates the diverging, or blurred, light rays.

To know more about convex lens visit:

https://brainly.com/question/1604692

#SPJ4

Answer:to protect an electrical circuit from damage caused by excess current from an overload or short circuit.

Explanation:

The free-fall acceleration on mars is 3.7 m/s2. length of pendulum has a period of 1.8 s on earth is L= 53.98cm.

According to the equation a = v/t, acceleration (a) is the product of the change in velocity (v) and the change in time (t). In terms of meters per second squared (m/s2), this enables you to calculate how quickly velocity varies.  

Calculate the result by subtracting the initial velocity from the final velocity and dividing it by the time interval. Your average acceleration throughout that period is the result.

given:-

pendulum has a period of T= 1.8 s on earth

T = 2π√(L/g)

T^2=4π^2(l/g)

l=  T^2*g/4π^2

l= 2.4^2*9.8/4*π^2

l= .53m= 53.98cm

To know more about pendulum  visit:-

https://brainly.com/question/14759840

#SPJ4

Inflammatory Bowel Disease (IBD) is a prevalent chronic inflammatory condition affecting the entire gastrointestinal tract, leading to persistent diarrhea.

Inflammatory Bowel Disease (IBD) encompasses two main conditions: Crohn's disease and ulcerative colitis. Both of these diseases cause inflammation and damage to the digestive tract, resulting in chronic diarrhea. Crohn's disease can affect any part of the gastrointestinal tract, from the mouth to the anus, while ulcerative colitis specifically affects the colon and rectum.

The inflammation in IBD occurs due to an abnormal immune response, where the body's immune system mistakenly attacks the healthy cells in the digestive tract. The exact cause of IBD is not yet fully understood, but it is believed to involve a combination of genetic, environmental, and immunological factors.

Chronic diarrhea is a prominent symptom of IBD, along with abdominal pain, cramping, fatigue, weight loss, and rectal bleeding. The disease often follows a relapsing and remitting course, with periods of active inflammation (flare-ups) alternating with periods of reduced or no symptoms (remission).

The diagnosis of IBD involves a thorough evaluation of symptoms, medical history, physical examination, and various diagnostic tests such as blood tests, endoscopy, colonoscopy, and imaging studies. Treatment for IBD aims to reduce inflammation, control symptoms, and prevent complications.

It usually involves a combination of medications, such as anti-inflammatory drugs, immunosuppressants, and biological therapies. In severe cases, surgery may be necessary to remove the affected portion of the bowel.

In conclusion, Inflammatory Bowel Disease (IBD) is a chronic inflammatory condition affecting the entire gastrointestinal tract, characterized by chronic diarrhea. It encompasses Crohn's disease and ulcerative colitis, which involve inflammation in different parts of the digestive tract. The underlying cause of IBD is complex and multifactorial.

Chronic diarrhea is a significant symptom, along with other gastrointestinal manifestations. Diagnosis involves a comprehensive assessment, and treatment focuses on reducing inflammation and managing symptoms through medication and, in some cases, surgery.

Learn more about Inflammatory Bowel Disease (IBD) here:

https://brainly.com/question/31715972

#SPJ11

It will take approximately 0.0054 seconds for the pulse to travel from one support to the other.

The time it takes for a pulse to travel from one support to the other in a stretched cord can be calculated using the wave speed formula. In this case, the wave speed is equal to the tension in the cord divided by the linear mass density of the cord. The linear mass density is equal to the mass of the cord divided by its length.

Given:
Mass of the cord (m): 0.65 kg
Distance between supports (L): 7.2 m
Tension in the cord (T): 120 N

First, we need to find the linear mass density (μ) of the cord:
μ = m/L
μ = 0.65 kg / 7.2 m
μ ≈ 0.0903 kg/m

Next, we can calculate the wave speed (v) of the pulse:
v = T/μ
v = 120 N / 0.0903 kg/m
v ≈ 1327.57 m/s

Finally, we can calculate the time (t) it takes for the pulse to travel from one support to the other:
t = L/v
t = 7.2 m / 1327.57 m/s
t ≈ 0.0054 s

In conclusion, it will take approximately 0.0054 seconds for the pulse to travel from one support to the other.

To know more about density visit:

https://brainly.com/question/29775886

#SPJ11

When one force is greater than another force, we can say that there is a change in motion. The correct answer is option C: "There is a change in motion."

According to Newton's second law of motion, the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. When one force is greater than another force, the net force acting on the object is not zero. If the net force acting on an object is not zero, it will cause the object to accelerate in the direction of the larger force. This acceleration leads to a change in motion. The object may speed up, slow down, change direction, or a combination of these.

Option A, "There is no net force," is incorrect because if one force is greater than another, there is a net force acting on the object.

Option B, "There is no change in motion," is incorrect because, as explained above, a greater force leads to a change in motion.

Option D, "The forces are in equilibrium," is incorrect because if one force is greater than another, the forces are not balanced, and the object is not in equilibrium.

Therefore, the correct statement is that there is a change in motion when one force is greater than another force.

for more questions on motion
https://brainly.com/question/1646992
#SPJ8

Answer:

59, 720 Joules

Explanation:

\(q = mc(t2 - t1) + m(lf) + mc(t2 - t1)\)

first term=ice to 0 degrees

second term=water to ice

third term-water to 30 degrees

\(q = 0.12 \times 2100 \times 20 + 0.12 \times 3.36 \times {10}^{5} + 0.12 \times 4200 \times 30\)

\(q = 59720 \: joules\)

Answer:

b

Explanation:

b

Answer:

The time taken for the airplane to cover the distance is 15 minutes.

Explanation:

Given;

velocity of airplane, u = 800 km/h

distance traveled by the airplane, s = 200 km

The time of this motion is given by;

s = ut + ¹/₂at²

at constant velocity, acceleration, a = 0

s = ut

t = s / u

t = (200 km) / (800 km/h)

t = 0.25 hour = 15 mins

Therefore, the time taken for the airplane to cover the distance is 15 minutes.

The process of fusion that keeps our Sun shining begins with which building blocks is neutrons. The correct answer is C.

The process of fusion that powers the Sun, known as nuclear fusion, begins with two protons, which are the positively charged particles found in the nucleus of an atom.

During the fusion process in the Sun's core, two protons combine to form a deuteron, which is a nucleus of deuterium, an isotope of hydrogen. This deuteron then undergoes further fusion reactions to produce helium and release a tremendous amount of energy in the form of light and heat. This continuous fusion process is what keeps our Sun shining.

Here you can learn more about fusion

https://brainly.com/question/12701636#

#SPJ11  

In ten seconds,a total of 5 waves crash onto the shore of the beach .

The distance between each wave crest on the water is 8 meters.

Wave length is the length between two wave crests that is the distance between two wave crests.

We know distance between each wave crest is 8 meters

Total of 5 wave crests, the distance between first and second wave crest is 8 meters

the distance between second and third wave crest is 8 meters

So wave length = 8+8 = 16 meters

To learn more bout frequency refer to:

https://brainly.com/question/254161

#SPJ1

Liquid gasoline is moving through a hose as she fills the car. If the speed of the gasoline decreases, then the pressure within the gasoline will increase. Thus, the correct option is A.

Bernoulli’s principle has been formulated by Daniel Bernoulli and this states that as the speed of a moving fluid increases such as liquid or gas, the pressure of the fluid within decreases. Although Bernoulli deduced this law, it was later derived by Leonhard Euler, he derived Bernoulli’s equation in its usual form in the year 1752.

Bernoulli's principle states that an increase in the speed of a fluid occurs simultaneously with a decrease in the static pressure or a decrease in the potential energy of the fluid.

Therefore, the correct option is A.

Learn more about Bernoulli's principle here:

https://brainly.com/question/13098748

#SPJ1

Answer:

Cells are small because they need to keep a surface area to volume ratio that allows for adequate intake of nutrients while being able to excrete the cells waste.

Explanation:

That is why the cell needs to be small

The  mass of the large truck is determined as 5680 kg.

The mass of the truck is calculated as follows;

P = mv

where;

m = P/v

m = 125000/22

m = 5680 kg

Thus, the  mass of the large truck is determined as 5680 kg.

Learn more about momentum here: https://brainly.com/question/7538238

#SPJ1

Answer:

C. 5680

Explanation:

edg2023

Answer:

I believe the answer is roughly 49m/s

Explanation:

List all given variables:

Accel=20m/s^2

Dist=100m

Final velocity=80m/s

Initial velocity=?

Using the equation i=sqrt(f^2-2a*d) where i =initial velocity, f=final velocity, a=acceleration, and d=distance, we can plug in the known values and solve for initial velocity

i=sqrt(80^2-2*20*100)

i=sqrt(6400-4000)

i=sqrt(2400)

i=48.99, rounded up to 49m/s as the initial velocity

This is my speculation about this answer would appreciate if anyone can confirm this.

The density of Paraffin is 536.8 kg/m³. To calculate the density of Paraffin, we can use the formula: Density = Mass/Volume

However, we do not have the mass of Paraffin, so we need to use Hare's apparatus to determine it indirectly. We know that the pressure exerted by the water column is equal to the pressure exerted by the paraffin column, so we can use this information to find the density of paraffin.

The pressure exerted by the water column is given by:
Pressure = ρgh

where ρ is the density of water, g is the acceleration due to gravity and h is the height of the water column. In this case, ρ = 1000 kg/m³ and h = 16 cm.

So, the pressure exerted by the water column is:
Pressure = 1000 x 9.81 x 0.16 = 1569.6 Pa

Now, we can use the same equation to find the density of paraffin. The height of the paraffin column is 30 cm, so the pressure exerted by the paraffin column is:
Pressure = ρgh = Density x g x h

We can rearrange this equation to find the density of paraffin:
Density = Pressure / (g x h)

Plugging in the values, we get:
Density = 1569.6 / (9.81 x 0.3) = 536.8 kg/m³

Therefore, the density of Paraffin is 536.8 kg/m³.

Learn more about Density here:

https://brainly.com/question/29775886

#SPJ11