how is cmb observed from earth

Destructive interference causes nodes—points with no amplitude—to form in a standing wave.

What do you call a point of destructive interference on a standing wave?

The nodes are areas of no displacement brought on by the two waves' destructive interaction. The two waves' constructive interference causes the antinodes to move maximally from their resting position.

Is there zero destructive interference amplitude?

The amplitude is 0 and resembles a node at a point of destructive interference. So, if we consider the aforementioned point to be nodes and antinodes, we can observe that the pattern of nodes and antinodes exactly matches that of a standing wave.

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The initial speed of car A is 15.18 m/s.

Momentum is defined as mass in motion. If there are two objects (the two objects in motion or only one object in motion and the other in stationary) that collide and no other forces work in the system, the law of momentum conservation applies in the system.

p=p'

pa+pb = pa'+pb'

(ma×va) + (mb×vb) = (ma×va') + (mb×vb')

(ma×va) + (mb×vb) = (ma×va') + (mb×vb')

(1,783×va) + (1,600×0) = (1,783×8) + (1,600×8)

(1,783×va) + 0 = 14,264+12,800

(1,783×va) = 27,064

[tex]va \:=\: \frac{27,064}{1.783}[/tex]

va = 15.18 m/s

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we learned that an energized conductor will build a magnetic field around it.this field is not same with both ac and dc circuits

A magnetic field is an invisible field that exerts a magnetic force on substances that are sensitive to magnetism. A classic example of one is the field created by an iron magnet; to see how the energy in such a field works, a small magnet can be placed under a piece of paper and iron filings sprinkled on it.

This important relationship between electricity and magnetism is known as electromagnetism, or the magnetic effect of current.

When DC current flows, the magnetic field will act in one direction.

when AC current flow will produce a magnetic field that varies in direction with the direction of the electron current flow.

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The time taken for the orange to return is 0.96 s.

We know that if an object is thrown up or down that we have to look at the equations of kinematics under gravity so as to be able to obtain the velocity of the object or the time taken.

Now;

v = u - gt

v = final velocity

u = initial velocity

g = acceleration due to gravity

t = time taken.

Thus;

v = 0 m/s at the maximum height so;

u = gt

t = u/g

t = 4.73/9.8 m/s^2

t = 0.48 s

In order to go up and return;

2( 0.48 s) = 0.96 s

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I hate to leave you without an answer, but there isn't enough information to be able to answer your problem.

The momentum at the end of the 1.5s in component form a speed of 1.23 m/sec.

mgh=1/2mv²

v=√2gh

v=3.7 m/s

elastic collision

V=(m₁-m₂/m₁+m₂)v

=0.5-2.5/.5+2.5(3.7)

V₁=-2.47 m/sec

V₂=(2m₁/m₁+m₂)V

=2(0.5)/0.5+2.5

V₂=1.23 m/sec

In Newtonian mechanics, momentum is calculated as the sum of an object's mass and velocity. It has both a magnitude and a direction, making it a vector quantity. The momentum of an object is determined by its mass (m) and its velocity (v). Since velocity is a vector and mass is a scalar, momentum is a vector quantity. Momentum can be viewed as a body's "power" while it is moving, or the amount of force it can exert on another body. For instance, a baseball (small mass) thrown quickly can have the same momentum as a bowling ball (big mass) going extremely slowly (low velocity) (high velocity).

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The constant force applied parallel to the plane required to cause a 15kg box to line up is 127.31 N.

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:-

mass =15 kg

Normal force = mgCos30°

parallel force = mgsin30°

acceleration required = 1.2 m/s²

Contact force = 15 × 9.8 × √3/2

                      = 127.31 N

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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Answer:

higher is safer

Explanation:

because it is a wet slippery surface, you would need more friction on the tires, to get more traction in the slippery wet road, if you had low friction you would not move anywhere and or could swerve off somewhere

Answer:

six months

Explanation:

Trust me on this i just answer it yesterday

The moment of inertia for a disk with mass of 500g and radius of 12cm rotated about its diameter is 7.2 × 10-³kgm².

Moment of inertia is a measure of a rigid body's resistance to change in its angular velocity around a given axis.

The formula for the moment of inertia is the “sum of the product of mass” of each particle with the “square of its distance from the axis of the rotation”. The formula of Moment of Inertia is expressed as follows:

I = mr²

Where;

According to this question, a disk with mass of 500g and radius of 12 cm rotated about its diameter. The moment of inertia can be calculated as follows:

I = 0.5kg × 0.12²m

I = 7.2 × 10-³kgm²

Therefore, 7.2 × 10-³kgm² is the moment of inertia of the disk.

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By analyzing the Sun's position information at two separate sites on the earth's surface, Eratosthenes, a Greek library in Alexandria, Egypt, discovered the moon's gravity in the third century BCE.

The solstice marks the time of year when the Sun appears to be at either its lowest or highest point in the sky. Because of this, ancients came to refer to this day as one when the Sun popped up to stand still. The word solstice is derived from the Latin words sol, which means "Sun," and sistere, which means "To Stand Still."

The Earth's axis tilts most nearly toward the sun twice a year during what are known as the solstices. The longest day is experienced in the hemisphere that is inclined closest toward our star.

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It states that: "At constant volume the pressure of a gas sample is directly proportional to the absolute temperature."

This means that doubling the pressure of the gas will cause its absolute temperature to double.

Mathematically this law is expressed as:

       [tex]\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{\dfrac{P_{1}}{T_{1}}=\frac{P_{2}}{T_2} \iff \ P_1T_2=P_2T1 } \end{gathered}$} }[/tex]

We have that the data is:

P₁ = 0.87 atm

T₁ = 25 °C + 273 = 298 K

T₂ = 50 °C + 273 = 323 K

P₂ = ?

We clear for the final pressure:

[tex]\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{P_{2}=\frac{P_1T_2}{T_{1}} } \end{gathered}$}}[/tex]

[tex]\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{P_{2}=\frac{(0.87 \ atm)\cdot(323\not{k})}{298\not{k}} } \end{gathered}$}}[/tex]

[tex]\boxed{\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{P_{2}=0.94 \ atm } \end{gathered}$}}}[/tex]

The electron and nucleus interact electrostatically, acting as a centripetal force. As the electron's velocity is tangential and this force is radial, it is perpendicular to the electron's motion and consequently has no effect on the electrons' kinetic energy.

The electron is a subatomic particle with the symbol or an electric charge of one elementary negative charge. Due to their lack of known components or substructure, electrons, which are part of the lepton particle family's first generation, are typically considered elementary particles. The mass of an electron is around 1/1836 that of a proton. In terms of the decreased Planck constant, the electron intrinsic angular momentum (spin) has a half-integer value. The Pauli exclusion principle states that because electrons are fermions, they cannot share the same quantum state. Electrons, like all elementary particles, have characteristics of both particles and waves: they can collide with other particles and can be diffracted like light.

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A multimeter is used for general electrical measurements. So, the correct option is (b)

A multimeter is an electronic measuring device that combines multiple measurement functions into one device. A typical multimeter include features such as the ability to measure voltage, current, and resistance.

Most multimeters have the ability to test circuit continuity. This makes it easier to find faults such as bad cables. It also helps to see if two points in the circuit are connected.

The typical multimeter can measure voltage, resistance, and current. In this case, the device is also called a Volt-Ohm Milliammeter (VOM), since it has the functions of a voltmeter, an ammeter, and an ohmmeter. Some of them even offer measurements of additional properties such as temperature and capacitance.

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If the velocity of the truck is (in the same direction as the car's initial velocity) after the collision, The initial speed of the car is 18.565 km/h.

Let the initial velocity of the car be uc

the truck is parked it implies ut = 0

for a head on elastic collision the final velocities are given by

[tex]vc = - (mt - mc/mt + mc) uc[/tex]

[tex]vt = (2mc/mt + mc)uc[/tex]

Velocity (vt)  = 17 Km/hr

uc = 18.565 Km/hr

In physics, a collision, which is also known as an impact, is the abrupt, violent coming together in close proximity of two bodies, such as two pool cues,  The force and the amount of time the objects are in touch, in addition to the materials the two objects are made of, have an impact on the outcome of the impact. It is generally knowledge that a hard steel ball dropped on a steel plate would rebound almost to the original position from where it was dropped, while a ball made of putty or lead will not.

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Answer: The mechanical advantage of the crowbar  9

Answer:

9

Explanation:

50N-load

450N-effort

m.a=load÷effort

450÷50=9

Answer:

gravitational force .. .. .

Explanation:

The forces applied on the bucket are tension and gravitational.

What is the gravitational force?

According to Newton’s gravitational law, it is the force exerted due to attraction between two objects that is directly proportional to the product of their masses and is inversely proportional to the square of distance between them.

The force applied to the bucket containing water is gravitational force. The gravitational force acts in downward direction and there is no change in the state of motion. There is another force as well which is the muscular force by which we hold the bucket in the upward direction with the help of our muscles. Tension is also exerted on the bucket as this force is seen in existence when any object is being pulled up with the help of string or rope. It is always seen in the direction which is parallel to the rope.

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The effect of - 0.1 miles tolerance on a 3595 miles radius of earth's surface area calculation is 0.00556 %

SA = 4 π r²

SA = Surface area of a sphere

r = Radius

Actual surface area,

r = 3595 mi

SA = 4 * 3.14 * 3595²

SA = 162325754 mi²

Surface area with tolerance,

r = 3595 - 0.1

r = 3594.9 mi

SA = 4 * 3.14 * 3594.9²

SA = 162316723.5 mi²

% error = ( Actual value - Error value ) / Actual value

% error = ( 162325754 - 162316723.5 ) / 162325754

% error = 9030.5 / 162325754

% error = 5.56 * [tex]10^{-5}[/tex]

% error = 0.00556 %

Therefore, the effect of - 0.1 miles tolerance on a 3595 miles radius of earth's surface area calculation is 0.00556 %

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The direction should approach the helicopter is the downhill side.

The Federal Communications Commission controls and regulates all interstate and international radio television wire satellite and cable communications within the United States. Typically the helicopter is approached from the front or sometimes from the side, within the pilot's line of sight. Never approach from behind. Never approach a downhill helicopter. Main he could step into the rotor.

Choose your way to the machine on level ground or uphill. Always approach helicopters from the downhill side. Rotor separation is greatly affected by slopes. To avoid the main rotor and other components of the described communication system taking off by approaching the sloping side of the sloping landing site.

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The speed of Mike and his bike before hitting the ramp is 4.48 m/s.

The acceleration of Michael and his bike is determined by applying Newton's second law of motion as follows.

According this law, the force applied to an object is directly proportional to the product of mass and acceleration of the object.

F = ma

a = F/m

where;

a = (456) / (136)

a = 3.35 m/s²

The speed of Mike and his bike before hitting the ramp is calculated as follows;

v² = u²  + 2as

where;

v² = 0 + 2(3.35)(3)

v² = 20.1

v = √20.1

v = 4.48 m/s

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1. The x component of the force is 4.4 N

2. The y component of the force is 3.5 N

The following data were obtained from the question:

1. How to determine the x component

x component = FCosθ

x component = 5.6 × Cos 39

x component = 4.4 N

2. How to determine the y component

y component = FSineθ

y component = 5.6 × Sine 39

y component = 3.5 N

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Speed (m/s) required to launch the projectile is 5.94m/s.

Speed is defined as the product of distance and the amount of time it took to cover that distance.

Equations,

Vx = Vxo

x = Vx × t

Vy = Vyo + gt

Vyo = 0

Vy = gt

y = yo - Vyo - gt² / 2

yo - y = gt²/ 2

time to get to the ground,

0.85 = g t² / 2

t² = 0.85m × 2 / 9.81 m/s²

t² =0.1732 s²

t = 0.416s.

initial velocity,

Vxo = x / t = 1.8m/ 0.416s =4.32m/s

speed before it strikes the ground,

Vy = g*t = 9.81 m/s × 0.416 = 4.08m/s

V² = Vy² + Vx² = (4.32 m/s)² + (4.08 m/s)² = 35.3064m²/s²

V = [tex]\sqrt{35.3064}[/tex]= 5.94m/s.

Speed required to launch the projectile is 5.94m/s.

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The distance travelled by the cart  on the flat surface before it comes to a stop is 1.25 m.

The acceleration of the cart is determined by applying Newton's second law of motion as shown  below.

F  = ma

a = F/m

a = 2 N / 0.8 kg

a = 2.5 m/s²

The velocity of the cart at the bottom of the hill is calculated as;

u  = √2gh

u = √(2 x 9.8 x 0.32)

u = 2.5 m/s

The distance travelled by the cart before stopping;

v² = u² - 2as

where;

2as  = u²

s = u²/2a

s = (2.5²) / (2 x 2.5)

s = 1.25 m

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A decrease in velocity is referred to as deceleration. If car is moving at 30 m/s and stop in 50 m .The value of deceleration is 11.56 ms−2.

While acceleration is motion in which an object's speed varies every second, deceleration is motion that causes an object to slow down.

We are aware that acceleration refers to an object's rate of increase in speed, and deceleration refers to an object's rate of decrease in speed. For instance, when we apply the brakes while driving, we benefit from the vehicle's ability to decelerate and slow down.

The Deceleration Formula is the final velocity minus the initial velocity, with a negative sign in the result because the velocity is decreasing, if starting velocity, final velocity, and time taken are given.

velocity of car = 30 m/s

car need to stop in 50m

Deceleration a = v^2 –  u^2 / 2s

                          = 0^2 - 50^2 / 2*30

                          = 11.56

Deceleration of the care = 11.56 ms−2

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Given statements are correct according to ignition coil resistance.

Resistance testing could not accurately represent how an ignition coil performs in practice. Testing the current limits and charging rise time of the ignition circuit can be done using current ramping. A coil's state may always be determined by measuring the resistance of the coil. Testing of current ramping is done using a digital storage oscilloscope.

Although most ignition coils' primary resistance should range from 0.4 to 2 ohms, you should check the manufacturer's specifications for the exact value. If the reading is zero, the ignition coil needs to be changed since the primary windings have internally shorted.

The resistance of an ignition coil can always be used to assess its condition.

The actual operating conditions of an ignition coil might not be captured by a resistance test.

Current ramping can be used to test the current limitations and charging rise time of the ignition circuit.

A digital storage oscilloscope is used for the ramping tests that are currently being done.

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Answer:

17.5175J

Explanation:

By the work-kinetic energy theorem,

[tex]W=\frac{1}{2} m{v_{f} }^{2} -\frac{1}{2} m{v_{i} }^{2}[/tex]

where [tex]v_{i}[/tex] is initial velocity and [tex]v_{f}[/tex] is final velocity. Note that their directions make no impact on the problem.

We can simplify this to:

[tex]W=\frac{1}{2} m({v_{f} }^{2} -{v_{i} }^{2})[/tex]

Now sub in our values:

[tex]W=\frac{1}{2} (3.5)({4.5 }^{2} -{3.2 }^{2})[/tex]

W= (1.75)(20.25-10.24)=17.5175J

(a) The ball will not pass over the wall

(b) The velocity is  21.45m/s

It is the amount of change in velocity per unit time. The velocity change can be calculated using the formula: velocity change = final velocity - initial velocity. This is the time when: The rate of change in velocity is expressed in

Given

A ball is thrown from a 10 m high cliff at the velocity 20 ms-¹ with an angle of 30° to the horizontal plane as shown in the picture below. 40 m from the edge of the cliff is a 10 m high wall.

We have to determine

a) Will the ball pass over the wall?

b) If not, where will it hit the wall and with what velocity?

From the given information

Initial velocity v =20m/s

Initial velocity along x direction vx = vcos300

= 20 cos300

= 20 x 0.866

= 17.32m/s

Initial velocity along y direction vy = v sin300

= 20 sin300

= 20 x 0.5

= 10m/s

Displacement along +ve x = 40m

Time required to travel t = x/vx

= 40/17.32

= 2.31seconds

At this time displacement of the ball along the y direction

Sy = vyt – 1/2gdt2

= 10x2.31 – ½ x 9.81 x (2.31)2

= 23.10 – 26.17

= - 3.07m

Since displacement is in a negative value, it will hit the wall and will not pass over the wall

The ball will hit at d distance from the ground

H = (10 – 3.07)

= 6.93m

Final velocity along +ve y = v’y = vy –gt

= 10 – 9.81 x 2.31

= 10 – 22.66

=-12.66m/s

velocity along +ve x = v’y = vx

= 17.32m/s

So-net velocity of the ball v’= √((v^' x)^2+(v^' y)^2 )

= √(〖(17.32)〗^2+〖(-12.66)〗^2 )

= 21.45m/s

Therefore

(a) The ball will not pass over the wall

(b) The velocity is  21.45m/s

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Answer:

Explanation:

is there a diagram of the question?

The parallel component of the total weight is 320 N and the perpendicular component of the total weight is 554.3 N.

The components of the total weight of the builder and the new roof tile which may be of two types, i.e. parallel components or perpendicular components.

The parallel component and new roof tiles can be calculated as;

Fn ( parallel ) =  W sin ( θ )

where;

W is the total weight

θ is the slope or angle of inclination of the total weight

So,

Fn ( parallel ) =  640 sin ( 30 )

Fn ( parallel ) = 320 N

The perpendicular component and new roof tiles is calculated as follows;

Fn ( parallel ) =  W cos ( θ )

where;

W is the total weight

θ is the slope or angle of inclination of the total weight

So,

Fn ( perpendicular ) =  640 cos ( 30 )

Fn ( perpendicular ) = 554.3 N

Thus, the parallel component of the total weight is 320 N and the perpendicular component of the total weight is 554.3 N.

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Your question is incomplete, most probably the complete question is :

The weight of the builder and new roof tiles is 640 N. The slope is at 30 degrees on the given diagram. Draw a diagram to calculate the components of the total weight parallel and perpendicular to the slope of the roof.

The height of the cliff is 6.22 meters and the time taken by the rock to hit the ground if thrown with same speed is 0.81 seconds.

The time taken by the rock to hit the ground when it is thrown up from the the cliff with an initial velocity of 8.01 m/s.

(a) From the equation of motion,

H = ut+1/2at²

H is the height of the cliff,

u is the the initial velocity,

t is the time taken by the rock,

g is the acceleration due to gravity.

Putting values,

H = (8.01)(2.21) + 1/2(-9.8)(2.21)²

H = -6.22m.

The height of the cliff is 6.22 m.

(b) If the rock is thrown down with the same speed,

Then the time taken by it to reach the ground is,

t = u/g

Putting values,

t = 8.01/9.8

t = 0.81 seconds.

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