The "Open" sign at your local deli flashes on and off all day long at 2.0 s intervals. The aliens spying on you from space are watching the same neon sign you are but they are moving towards Earth at a speed of 0.90c. How long is the interval flash (in s) for the aliens?

Explanation:

arn core concepts.

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1) For a P wave with velocity of 8 km/s (typical upper mantle speed) in a Poisson solid,compute the wavelength for waves with periods of:

a) 15 sec

b) 1 sec

c) 0.1 sec (100 Hz)

2) Repeat question 2 for an S wave in the same medium (Hint: you have to determine the S wave speed).

Answer:

1. Superior- toward the head

2. Inferior- away from the head

3. Anterior- toward the front

4. Posterior- toward the back

5. Ventral- toward the belly

6. Dorsal- toward the back

7. Proximal- toward the center of the body

8. Distal- away from the center of the body

Explanation:

An expression for velocity, v, of the meteoroid's speed at the planet's surface, in terms of G, M, v, R1, and R is v = v₁ - √{2GM/(R₁ - R)}

The value of v, the meteoroid's speed at the planet's surface, in meters per second is 2.596 * 10⁷ m/s.

The speed of the meteoroid is equal to the difference between the speed of the meteorite, v₁, and the escape velocity of the meteorite from the gravitational pull of the planet.

The escape velocity of an object is equal is the velocity of an object which when summed with the gravitational potential energy of the object is equal to zero.

The formula for escape velocity, Ve, is given below:

Ve = √2GM/r

where;

G = universal gravitational constant

M = mass of the body to be escaped from

r = distance from the center of the mass

G is the gravitational constant = 6.67 * 10⁻¹¹ m³kg⁻¹s⁻²

v₁ = 2.6 * 10⁷ m/s

Hence, the velocity of the meteorite will be:

v = v₁ - √{2GM/(R₁ - R)}

Calculating the velocity, v

v = 2.6 * 10⁷ m/s - √{(2 * 6.67 * 10⁻¹¹ * 9.6 * 10²⁵ ) / (1.6 * 10⁷ - 0.22 * 10⁷)}

v = 2.596 * 10⁷ m/s

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The Moist unit weight of the soil with a moist weight of 102.3 N, moisture content of 11 % and specific gravity of 2.7 is 18.27 KN / m³

Moist weight = 102.3 N

Volume = 5600 cm³

Water content, w = 0.11

Specific gravity, G = 2.7

a ) Moist unit weight, γ[tex]_{b}[/tex]

γ[tex]_{b}[/tex] = Moist weight / Volume

γ[tex]_{b}[/tex] = 102.3 / 5600 * [tex]10^{-6}[/tex]

γ[tex]_{b}[/tex] = 18.27 KN / m³

b ) Dry unit weight, γ[tex]_{d}[/tex]

γ[tex]_{d}[/tex] = γ[tex]_{b}[/tex] / 1 + w

γ[tex]_{d}[/tex] = 18.27 / ( 1 + 0.11 )

γ[tex]_{d}[/tex] = 16.46 KN / m³

c ) Void ratio, e

γ[tex]_{d}[/tex] = G γ[tex]_{w}[/tex] / ( 1 + e )

16.46 = 2.7 * 9.81 / ( 1 + e )

1 + e = 1.61

e = 0.61

d ) Porosity, n

n = e / ( 1 + e )

n = 0.61 / ( 1 + 0.61 )

n = 0.38

e ) Degree of saturation, s

s = G w / e

s = 2.7 * 0.11 / 0.61

s = 0.487

s = 48.7 %

f ) Volume occupied by water, V

V = G w

V = 2.7 * 0.11

V = 0.297

Therefore,

γ[tex]_{b}[/tex] = 18.27 KN / m³

γ[tex]_{d}[/tex] = 16.46 KN / m³

e = 0.61

n = 0.38

s = 48.7 %

V = 0.297

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The symbol used for momentum is" p".

According to the Newton's alternate law of stir it states that the momentum is the product of mass and the haste of the flyspeck. This momentum can be said as the measure of stir of the object. It's a vector volume and it has both magnitude and direction. It can be transferred. As the momentum of the system is conserved when no external force is applied on the system.

In this case,

momentum( p) = mv

where,

m = mass

v = haste

P = momentum

momentum is the measure of stir of the object.

momentum is given by the product of mass and the haste of the object.

momentum can be transferred.

thus, the momentum is defined by the Newton's alternate law and it's denoted by the symbol" P".

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On the basis of their speed comparison, the truck has a much higher speed than the car.

what is linear momentum?

The relationship between an object's mass (m) and velocity (v) is known as its linear momentum.

An equation can be used to explain this relationship. Momentum is defined as the body's mass times its velocity, P = m /times v, etc.

Main body:

The mass of the truck is significantly greater than the mass of the car because the semitrailer truck is enormous and the car is little. It is obvious that with a constant momentum, greater mass results in slower speed and less mass results in faster speed.

Inertia in motion is expressed by the term momentum. The product of an object's mass and velocity is its momentum. Because of its greater bulk, a moving truck has more momentum than a car travelling at the same speed. A truck may go with less momentum than a fast car.

Therefore, on the basis of their speed comparison, the truck has a much higher speed than the car.

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The net force on particle q3 will be 327.40 N

Force between two charges = k ( q0 * q1 ) / [tex]r^{2}[/tex]

where q0 and q1 are charges

r is the distance between them

force between q3 and q2 =  k ( q3 * q2 ) / [tex]r^{2}[/tex]

                                          = k ( 84.2 * [tex]10^{-6}[/tex] * 90.6 * [tex]10^{-6}[/tex] ) / [tex](0.432)^{2}[/tex]

                                          = k (40150.10 * [tex]10^{-12}[/tex] )

force between q1 and q3 = k ( q1 * q2 ) / [tex]r^{2}[/tex]

                                          = k ( 75.8 * [tex]10^{-6}[/tex] * 90.6 * [tex]10^{-6}[/tex] ) / [tex](1.71)^{2}[/tex]

                                          = k ( 3732.37 * [tex]10^{-12}[/tex] )

net force = force between q3 and q2 -  force between q1 and q3

               = k (40150.10 * [tex]10^{-12}[/tex] )  - k ( 3732.37 * [tex]10^{-12}[/tex] )

               = 327.40 N

The net force on particle q3 will be 327.40 N

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180.0176 m is the distance between these two objects  .

What is Gravitational force ?

Gravity, also called gravitational force in mechanics, is the universal force of attraction that acts between all matter. It is by far the weakest known force in nature and plays no role in determining the internal properties of everyday matter. It controls the orbits of objects in places, the structure and evolution of stars, galaxies, and the universe as a whole. On Earth, every object has a weight, or downward gravitational force, proportional to its mass, equal to the mass of the Earth acts on them. Gravity is measured by the acceleration it imparts to a free-falling object., Its velocity increases by about 9.8 meters per second. On the moon, the acceleration of a free-falling object is approximately 1.6 meters per second.

F = Gm1m2/r^{2}

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The overall velocity is 11.81102362m/s.

[tex]p=Mv\\\\v=p/M\\\\v=18000/1524\\\\v=11.81102362m/s[/tex]

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Answer:

B

Explanation:

Potential difference across 2 parallel branches is the same.

Current may be different depending on different resistance within each branch

If both runner A and runner B start the race together, they will 1.125 m apart at the finish of the race

v = d / t

v = Velocity

d = Distance

t = Time

d = 4.5 m

For runner A,

t = 4.5 min

v = 4.5 / 4.5

v = 1 m / min

For runner B,

t = 6 min

v = 4.5 / 6

v = 0.75 m / min

Runner A finished the race first at 4.5 min. At that time the runner B will have covered,

0.75 = d / 4.5

d = 0.75 * 4.5

d = 3.375 m

Difference in distances = 4.5 - 3.375

Difference in distances = 1.125 m

Therefore, they will 1.125 m apart at the finish of the race

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Answer:

option (A)

Explanation:

In fig. (A) two equal forces are acting at the same point in opposite directions ,therefore net force is zero as they will cancel each other.Now as there is no net force on particle so the acceleration is zero(a=F/m=0/m=0) and thus velocity v remains constant

It is to be noted that the y-intercept of the graph is 20. The slope is -0.2; while the area under the graph is: 840

At x = 0, the value of y is 20. Hence the intercept of the graph is 20.

To compute the slope, recall that the graph passes through points (0, 20) and (60, 8) hence the solution of the graph is given as:

Change in y coordinate/Change in x coordinate

= (8-20)/60-0)

= -12/60

= -1/5 or -0.2

The area under the graph compares a right-angled triangle and a rectangle. To get the area under the graph we need to find the sum of the areas of both shapes.

Recall that Area of a Right Angled Triangel is given as 1/2 B*H

Hence

⇒ 1/2 * 12 * 60

= 360

The area of a rectangle is L x B

Hence

⇒ 8 x 60

= 480

Thus, the area under the graph is

360 + 480

= 840

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The position of the image is at infinity, nature is real and the size of the image formed is highly magnified.

A concave mirror has a reflective floor that is curved inward and far from the light source. Concave mirrors mirror mild inward to at least one focal length. not like convex mirrors, the picture shaped by a concave replicate suggests exceptional photo sorts depending on the space between the item and the replicate.

Calculation:-

1/f = 1/v + 1/u

1/10 = 1/v + 1/10

V = infinity

The size of the image is Highly magnified and real.

Concave mirrors form both real and virtual photos. while the concave reflect is positioned very close to the object, a digital and magnified photo is received, and if we grow the gap between the object and the mirror, the size of the picture reduces, and real snapshots are shaped.

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The water can be conserved by some of the given tips, turn off the water when washing your hands, Carry a refillable water bottle, Skip the tray in the lunch line, use only one plate, Report leaks to the appropriate authorities, etc.

The protection, management, and development of surface and groundwater resources as well as pollution prevention.

There are some tips to conserve water or reduce water use in school,

Therefore, these recommendations for pupils on how to conserve water at school may seem minor or small in comparison to the tremendous environmental issues that exist today.

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Answer:

Explanation:

The net force on the airplane:

R = 800 - 40 - 60 = 700 N

Answer:

1.67 degrees C

Explanation:

5/9  * 3 = 15 /9 =  1.67

1.67 degrees above normal is this body temperature on the Celsius scale

What is temperature ?

A measure of temperature, heat or cold, expressed on one of several arbitrary scales that indicate the direction in which heat energy naturally flows. H. From hot body (high temperature) to cold body (low temperature). temperature). Temperature is not equivalent to energy in a thermodynamic system. For example, a burning match has a much higher temperature than an iceberg, but the total heat energy contained in the iceberg is much greater than the energy contained in the match. Temperature, like pressure and density, is called a lumped property (a property that does not depend on the amount of matter of interest), as opposed to a broader property such as mass or volume.

180 degree on Fahrenheit scale = 100 degree on Celsius scale

3 degree on Fahrenheit scale = 100*3/180 degree on Celsius scale

                                                  = 1.67 degree Celsius

1.67 degrees above normal is this body temperature on the Celsius scale

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"Professor Moriarty of mathematical celebrity...is the Napoleon of Crime." ~Sherlock Holmes is option C:  Neither.

A generalization is when something specific is used more widely. Saying that all dogs chase squirrels is a generalization. A generalization is when you take one or a few facts and turn them into a more broad-based, universal claim.

It is  when you say something about all or most of the people or objects at once. For instance, every angel has wings. - Cereal is a common breakfast choice for adult.

Note that a successful analogy strikes a balance between two opposing objectives: recognizability as well as representativeness. The best analogies are well known. They use a well-known concept to describe an abstract thought.  Example" You have to be as busy as a bee to obtain good grades in high school," she said, "She's as blind as a bat." Thus the statement above is neither the both of them.

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Answer:

20 N

Explanation:

the force of static friction maximum = Fn * .15 = 200 * .15 = 30 N

  the force of friction will cancel out the 20 N force applied

    Ff = 20 N

The maximum acceleration attained on the interval 0 ≤ t ≤ 3 by the particle is equal to 21 m/s².

Acceleration of an object can be described as the change in velocity of the object with respect to time. Acceleration can be described as the first derivative of the velocity of an object with respect to time.

The expression for the acceleration in terms of velocity can be represented as:

[tex]{\displaystyle a =\frac{dv}{dt}[/tex]

Given the expression of the velocity is v (t) = t³ - 3t² + 12t +4

dv/dt = v'(t) = d/dt(t³ - 3t² + 12t +4)

a(t) = 3t² - 6t +12

At time t = 0 , a(0) = 3(0)² - 6(0) +12 = 12

At time t = 3s, a(3) = 3(3)² - 6(3) +12 = 21

Therefore, the maximum acceleration attained on the interval 0 ≤ t ≤ 3 is equal to 21.

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Answer:

2.2-1.6m/s2 then your got the answwr

Bluetooth works through radio waves in the ISM band, that is, they work by radio frequency. For that use the wireless networks of personal area (WPAN).

Bluetooth is a form of communication that works through radio waves by which there can be a transfer of data such as music, documents, images, etc. It works at a short distance so the devices must be close for the data transfer to occur correctly

Therefore, we can confirm that Bluetooth works through radio waves in the ISM band, that is, they work by radio frequency. For that use the wireless networks of personal area (WPAN).

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Answer:

Question:

PH

Patrick H.

Physics 101 Mechanics

6 months, 3 weeks ago

My answer: Given a wave of weight with a particular wavelength and amplitude, what must be the amplitude wavelength and phase change you add to create a wave of twice the amplitude. So the amplitude, the wavelength and the phase of the second wave have to be the same because in order to have these add up together or to be twice they have to interact via constructive interference. And that's only possible when the wavelength and the phase are the same. So in constructive interference, the waves overlap with one another to form a third wave With an amplitude equivalent to the sum of the two. So for example, one wave in red, let's say, another wave in pink. And there are a total wave. Is that some of these to something like this? So the amplitude wavelength and face have to be the same.

Given a wave of a particular wavelength and amplitude, what must be the amplitude, wavelength, and phase change of a wave you add to this wave to create a wave of twice the amplitude? given a wave of a particular wavelength and amplitude, what must be the amplitude, wavelength, and phase change of a wave you add to this wave to create a wave of twice the amplitude?

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So given a wave of weight with a particular wavelength and amplitude, what must be the amplitude wavelength and phase change you add to create a wave of twice the amplitude. So the amplitude, the wavelength and the phase of the second wave have to be the same because in order to have these add up together or to be twice they have to interact via constructive interference. And that's only possible when the wavelength and the phase are the same. So in constructive interference, the waves overlap with one another to form a third wave With an amplitude equivalent to the sum of the two. So for example, one wave in red, let's say, another wave in pink. And there are a total wave. Is that some of these to something like this? So our amplitude wavelength and face have to be the same.

Newton's 2nd law which applies to external forces acting on a system. The forces which are holding a body together are internal forces. According to Newton's 3rd law, for every internal force that is acting on the system there will be and equal and opposite force acting on the system. These 2 forces will "cancel" (the vector sum will be zero), so they will not cause acceleration (according to 1st law).

Newton's laws of motion are 3 basic legal guidelines of classical mechanics that describe the relationship between the motion of an object and the forces acting on it.

Newton legal guidelines inform us precisely how matters flow or sit still, like why you don't drift off the bed or fall via the floor of your own home. Newton's laws manipulate how cars work, how water flows, how buildings do not fall down, and essentially how the everything  moves around us.

The Newton's three laws of motion are law of Inertia, law of Mass and Acceleration, and the 3rd regulation of movement. outside force.

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The main themes of "The Hill We Climb" are the development and growth of nations over time.

The challenge of creating a fairer, more libertarian, and better America is represented by the poem's title's hill. The poem suggests that for Americans to "climb" this hill, they must acknowledge its steepness.

American poet Amanda Gorman wrote the spoken word poem "The Hill We Climb," which she recited on January 20, 2021, at Joe Biden's inauguration in Washington, D.C.

An inspiring call to action, The Hill We Climb by Amanda Gorman was released on Inauguration Day and emphasizes themes of resiliency, hope, and community. In this lesson plan, students concentrate on these concepts and consider how their own unique viewpoints and experiences can help America "forge a union with purpose."

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Answer:

B, D, E

Explanation:

The coin's acceleration is 0.37 m/s²

Acceleration is the rate of change of the velocity of an item with appreciation to time. Accelerations are vector portions. The orientation of an item's acceleration is given by the orientation of the net pressure appearing on that object.

Calculation:-

V² = U -2aS

a = U/2S

  = 2/2×2.7

   =  0.37 m/s²

Acceleration is the charge at which velocity modifications with time, in terms of each speed and route. A factor or an object moving in a straight line is accelerated if it quickens or slows down. movement on a circle is extended despite the fact that the rate is consistent because the course is continually changing.

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In an ultra-low-temperature experiment, a collection of sodium atoms enters a special state called a Bose-Einstein condensate in which the index of refraction is 1.57×107. The speed of light in this condensate will be 19 m/s

The ratio between the speed of light in medium to speed in a vacuum is the refractive index. When light travels in a medium other than the vacuum, the atoms of that medium continually absorb and re-emit the particles of light, slowing down the speed light

refractive index = speed of light in vacuum / speed of light in that medium

1.57×[tex]10^{7}[/tex] = 3 * [tex]10^{8}[/tex] / speed of light in that medium

speed of light in that medium = 3 * [tex]10^{8}[/tex]  / 1.57×[tex]10^{7}[/tex]  = 1.9 * 10 = 19 m/s

The speed of light in this condensate will be 19 m/s

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