where do the photons in the cosmic background radiation originate?

Answer:

v = 20 m/s

Explanation:

Answer:

\( \dashrightarrow \: { \tt{average \: velocity = \frac{v + u}{2} }} \\ \)

• u is initial velocity

• v is final velocity

\(\dashrightarrow \: { \tt{average \: velocity = \frac{25 + 15}{2} }} \\ \\ = { \tt{ \frac{40}{2} }} \\ \\ = { \tt{20 \: m {s}^{ - 1} }}\)

Answer:2.01201

Explanation:

A DC motor is powered with Ea = 400V, the armature resistance is Ra = 20, the torque constant of the motor is K+ = 1 Nm/A.

The load torque intercepts the motor torque in two places, only one will be positive, drop you will again need to solve = 0. d the given details are Ea = 400VRa = 20K+ = 1 Nm/A

To find; Gear ratio G required to drive this load at its maximum operating speed.

Formula used: θ=K+ * Ia The motor torque, Tm = K+ * Ia The load torque, TL = J * dw / G The armature current, Ia = (Ea - V) / Ra By equating the motor torque and load torque, we have; K+ * Ia = TL The load torque is positive, so we have;TL = J * dw / G Since the load is operating at maximum speed, d w = 0So, TL = 0 = J * 0 / G

Thus, G is not found in the equation.

So, we can conclude that G does not affect the maximum speed of the motor. The maximum speed is determined by the back EMF, Ea, and the motor constants, K+ and Ra.

So, the gear ratio G is irrelevant in determining the maximum speed of the motor.

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Answer:

v=u+at

v=21+1.4(11)

v=21+15.4

v=36.4

The most effective way for an inactive student to become more physically active is to make a schedule and stick to it. This can involve setting aside specific times for exercise each day.

Starting with small goals and gradually increasing the duration and intensity of their physical activity can also be helpful. Including physical activity into their daily routine like taking the stairs instead of the elevator or going for a walk during lunch, can make it easier to fit exercise into their busy schedule.

Physical fitness is important for a number of reasons like improved Health, better mental health, increased energy, improved sleep and better brain functioning.

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Answer:

The charge 3q must be placed at a distance of 1.73d away from the origin.

Explanation:

The electric field at the origin due to q at distance, d from the origin is E = q/4πε₀d².

The electric field at the origin due to 2q at distance, d from the origin is E' = -2q/4πε₀d². (It is negative since it its directed towards the negative x-axis)

Now, the net electric field at the origin due to both charges is thus E" = E + E' = q/4πε₀d² + (-2q/4πε₀d²) = q/4πε₀d² - 2q/4πε₀d² = -q/4πε₀d².

The electric field due to 3q at a distance x from the origin is E₁ = 3q/4πε₀x².

Now, the net electric field E' must cancel out E₁ so that the electric field at the origin is zero.

So, E' + E₁ = 0

E' = -E₁

-q/4πε₀d² = -3q/4πε₀x²

1/d² = 3/x²

taking inverse of both sides, we have

x²/3 = d²

multiplying both sides by 3, we have

x² = 3d²

taking square root of both sides, we have

x = (√3)d

x = ±1.73d

So, the charge 3q must be placed at a distance of 1.73d away from the origin.

Answer:

4:Hhhhghhhhhhhhhhhhhhhhhhhhhhhhhhhhh. 5:Bbbbbbbbbbbbbbbbbbbbb

The gravitational potential energy (PE) of an object is given by the formula:

PE = mgh

where m is the mass of the object, g is the acceleration due to gravity, and h is the height of the object above some reference point.

In this case, the bell has a PE of 8,550 J and a mass of 20 kg. We can rearrange the above formula to solve for the height h:

h = PE/(mg)

Substituting the given values, we get:

h = 8,550 J / (20 kg x 9.81 m/s^2) ≈ 43.4 meters

This is the height from which the bell falls. When the bell falls to the ground, all of its PE is converted to kinetic energy (KE). The formula for KE is:

KE = (1/2)mv^2

where m is the mass of the object and v is its velocity.

Setting the PE equal to the KE, we get:

PE = KE

mgh = (1/2)mv^2

Simplifying and solving for v, we get:

v = √(2gh)

Substituting the values for g and h, we get:

v = √(2 x 9.81 m/s^2 x 43.4 m) ≈ 29.4 m/s

Therefore, the final velocity of the bell when it hits the ground is approximately 29.4 m/s.

Answer:

Electric potential energy

Explanation:

The Electric potential energy of a system is less than that carried out by electrostatic forces during the development of the system (as long as charges are initially cut infinitely).

The change in potential energy between an initial and final configuration  is equal to minus the work done by the electrostatic forces.

Answer:

Time taken for car to stop = 0.89 seconds (Approx.)

Explanation:

Given:

Mass of car = 1100 kg

Speed of car = 15 m/s

Impact force = 185,000 N

Find:

Time taken for car to stop

Computation:

Change in momentum of car = M(v) - M(u)

Change in momentum of car = 1100(0) - 1100(15)

Change in momentum of car = -16,500

Time taken for car to stop = I Change in momentum of car I / Impact force

Time taken for car to stop = I-16,500I / 185,000

Time taken for car to stop = 0.89 seconds (Approx.)

The time it takes for the car to stop will be 0.89 sec. Due to the external resistive force, the car will stop after some time.

The momentum is defined as the product of mass and the velocity of the body. It is denoted by the letter P. It occurs due to the applied force. Its unit is Kg m/s².

The change in the momentum of the car is given as;

\(\rm \triangle P = m(V-U) \\\\ \triangle P = 1100(0-5) \\\\ \rm \triangle P =-16,500 Kgm/s\)

The time taken for a car to stop will be;

\(I \triangle p= F\triangle t \\\\ \rm t = \frac{\triangle p }{F} \\\\ \rm t = \frac{|-16500|}{18500} \\\\ \rm t =0.89 \ sec\)

Hence the time it takes for the car to stop is 0.89 sec.

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Explanation:

a) i) Calculation of the friction force:

The friction force can be determined using the equation:

friction force = coefficient of friction * normal force

The normal force is equal to the weight of the object, which can be calculated as:

normal force = mass * gravitational acceleration

where the gravitational acceleration is approximately 9.8 m/s².

normal force = 75 kg * 9.8 m/s² = 735 N

friction force = 0.4 * 735 N = 294 N

ii) Calculation of the acceleration of the body:

Now, we can calculate the acceleration using Newton's second law:

net force = mass * acceleration

Since the applied force and the friction force act in opposite directions, the net force can be calculated as:

net force = applied force - friction force

net force = 300 N - 294 N = 6 N

mass = 75 kg

6 N = 75 kg * acceleration

acceleration = 6 N / 75 kg = 0.08 m/s²

b) Explanation:

In part (a), we calculated the friction force to be 294 N and the acceleration of the body to be 0.08 m/s². The positive acceleration indicates that the body is moving in the direction of the applied force.

The friction force opposes the motion of the body and acts in the opposite direction to the applied force. In this case, the applied force of 300 N is greater than the friction force of 294 N. As a result, the net force acting on the body is 6 N in the direction of the applied force.

The small net force of 6 N, compared to the body's mass of 75 kg, results in a relatively low acceleration of 0.08 m/s². This indicates that the body will accelerate slowly in the direction of the applied force due to the presence of friction.

Overall, the friction force and the resulting acceleration of the body are determined by the coefficient of friction (μ) and the mass of the object. In this case, the body experiences a relatively high friction force, leading to a small acceleration.

Answer:

The correct answer is B.) muscular endurance

Explanation:

I just did the assignment on my hw and got it right.

Answer:

1 hour

Explanation:

The tailwind usually adds to the speed of airplanes while the headwind normally decreases the speed of airplanes.

For the initial journey of 200 mph with a 40 mph tailwind speed for 480 miles:

Total speed = 200 + 40 = 240 mph

Also,

Speed = distance/time

time = 480/240 = 2 hours

For the return journey of 200 mph with a 40 mph headwind for 480 miles:

Total speed = 200 - 40 = 160 mph

time = 480/160 = 3 hours

The initial flight took 2 hours while the flight back home took 3 hours. Hence it took 1 hour longer to get back home

Answer:

3.

Explanation:

I'm pretty sure it's 6m/s hope this helps!

If a dog runs a distance of 30 meters in 6 seconds, then the velocity of the dog would be 5 m/s, therefore the correct answer is the second option.

The total displacement covered by any object per unit of time is known as velocity. It depends on the magnitude as well as the direction of the moving object.

The unit of velocity is a meter/second. It can also be represented by the infinitesimal rate of change of displacement with respect to time.

The generally considered unit for velocity is a meter per second.

As given in the problem if a dog runs a distance of 30 meters in 6 seconds

The distance traveled by the dog = 30 meters

Time is taken by the dog to cover the distance = 6 seconds

the velocity of the dog = distance traveled by the dog /time taken by the dog

                               = 30/6

                               = 5 m/s

Thus, the velocity of the dog would be 5 m/s, therefore the correct answer is the second option.

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A vector is any element of a vector space is True by the definition of a vector space. So, the correct answer is C.

A vector space is a collection of vectors that satisfy certain axioms or properties, such as closure under vector addition and scalar multiplication. Therefore, any element of a vector space must be a vector.

A vector space or a linear space is a group of objects called vectors, added collectively and multiplied (“scaled”) by numbers, called scalars. Scalars are usually considered to be real numbers. But there are few cases of scalar multiplication by rational numbers, complex numbers, etc. with vector spaces.

The methods of vector addition and scalar multiplication must satisfy specific requirements such as axioms. Real vector space and complex vector space terms are used to define scalars as real or complex numbers.

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The frequent earthquakes in certain locations support the theory of plate tectonics.

Plate tectonics is the scientific theory that explains the movement of the Earth's lithosphere. Earthquakes are caused by the movement of tectonic plates, and the locations of frequent earthquakes help to support the theory of plate tectonics.

For example, areas such as the Ring of Fire, a region around the Pacific Ocean where a large number of earthquakes and volcanic eruptions occur, are located at the boundaries of several tectonic plates.

These boundaries are where the plates interact with one another, causing earthquakes, volcanic eruptions, and other geological events.

In addition to the Ring of Fire, other areas that experience frequent earthquakes are also located at plate boundaries.

For example, the San Andreas Fault in California marks the boundary between the Pacific Plate and the North American Plate, and earthquakes in this region are the result of the plates moving past one another.

Similarly, the Himalayan Mountains were formed as the result of the collision between the Indian Plate and the Eurasian Plate. The action of the plates pushing against one another causes frequent earthquakes in the region.

Overall, the locations of frequent earthquakes help to support the theory of plate tectonics by providing evidence of the movement and interaction of tectonic plates. Scientists use this evidence to better understand the Earth's geology and to make predictions about future earthquakes and other geological events.

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Energy from the Sun cannot directly reach the entire daytime side of the Earth during a solar eclipse.

during a solar eclipse, the Moon passes between the Sun and the Earth, blocking the direct path of sunlight to the Earth. Therefore, the energy from the Sun cannot directly reach the entire daytime side of the Earth during a solar eclipse.

However, the Earth's atmosphere scatters some of the Sun's light, which creates a faint glow known as the "solar corona" around the Moon during a total solar eclipse. This glow can provide some indirect illumination to the Earth's surface, but it is much less intense than direct sunlight and is limited to the regions near the path of the eclipse.

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Explanation:

If we push on the book with a force of less than 5 N, the book won't move, because the frictional force will exactly balance the force we apply. If we push with a 1 N force, a 1 N frictional force opposes us.

As mass is constant during free-weight resistance training, a greater impulse will result in a greater velocity.Explanation:

Each of the faces that make up the corner has a flux of q/(80), while the flux through the other faces is q/(0).

The sum of the fluxes through all of the cube's sides yields the total flow across its surface, which is zero. If there is no source or sink for the vector field within the surface's contained volume, the flux of the vector field across the surface is always zero.

(A) We can use a cube with side length an as our Gaussian surface to determine the flux via the three sides close to the corner. This surface's charge is simply q because it is placed within it within the cube.

flux = q / ϵ0

(b) We need to utilize a larger cube with a side length of 2a as our Gaussian surface in order to determine the flux across the three faces opposite the corner. Both the charge at the corner and an equal and opposite charge at the other corner of the larger cube will be contained by this cube.

q / (80) = flow = (q/8) / 0

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the volume of the brass washer is approximately 1.292 x 10^(-5) cubic meters, and its mass is approximately 0.111 kilograms.

To calculate the volume and mass of the brass washer, we can use the provided dimensions and the density of brass.

Given:

Outside diameter of the washer, D_outside = 4.50 cm = 0.045 m

Hole diameter of the washer, D_hole = 1.25 cm = 0.0125 m

Thickness of the washer, t = 1.50 mm = 0.0015 m

Density of brass, ρ = 8601 kg/m^3

First, we need to calculate the volume of the washer. The washer can be considered as a cylindrical shape with a cylindrical hole subtracted from it. The volume of the washer is the difference between the volume of the outer cylinder and the volume of the inner cylinder.

Volume of the outer cylinder:

V_outer = π * (D_outside/2)^2 * t

Volume of the inner cylinder (hole):

V_inner = π * (D_hole/2)^2 * t

Volume of the washer:

V_washer = V_outer - V_inner

Next, we can calculate the mass of the washer using the density formula:

Mass of the washer:

m_washer = V_washer * ρ

Finally, we substitute the values into the formulas and calculate the volume and mass:

V_outer = π * (0.045/2)^2 * 0.0015 = 1.599 x 10^(-5) m^3

V_inner = π * (0.0125/2)^2 * 0.0015 = 3.066 x 10^(-6) m^3

V_washer = V_outer - V_inner = 1.292 x 10^(-5) m^3

m_washer = V_washer * ρ = (1.292 x 10^(-5) m^3) * (8601 kg/m^3) = 0.111 kg

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The distance covered by the boy before his little brother see him is 45 m.

The distance that can be covered by a boy travelling at 3 m/s for 15 seconds is calculated using the formula that relates speed, distance and time.

The formula relating distance, speed, and time is as follows;

The distance travelled can be obtained by a rearrangement of the equation above:

Considering the data provided;

The speed of the boy is 3 m/s

time required is 15 s

Distance covered by the boy = 3 m/s * 15 s

Distance covered by the boy = 45 m

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Answer:

Presión = 11111,11 N/m

Explanation:

Dados los siguientes datos;

Diámetro = 1,5 cm a metros = 1,5 / 100 = 0,015 m

Fuerza = 2N

Para encontrar la presión;

En primer lugar, determinaríamos el área del círculo usando la fórmula;

Área del círculo = πr²

Radio = diámetro/2 = 0.015/2 = 0.0075 m

Área de la jeringa = 3.142 * 0.0075²

Área de la jeringa = 3.142 * 0.00005625

Área de la jeringa = 0.00018 metros

Ahora, podemos encontrar la presión usando la fórmula;

Presión = fuerza/área

Presión = 2/0.00018

Presión = 11111,11 N/m

Answer:

Most aircraft that leave trails aren't leaving smoke. It's condensed water vapour; essentially, clouds. These are called contrails. This can be caused by the water in the engine exhaust condensing, or by the disruption of the air by the passage of the aircraft triggering the condensation of water that was already present. Some aerobatic aircraft have smoke generators which leave much thicker and more visible trails which can be turned on and off and don't depend on particular atmospheric conditions. White is most common but other colours are possible.

The required image distance when an object is placed in front of the concave mirror is calculated to be 58.82 cm.

Given that,

Size of the image = 3 × Size of the object

S i = 3 S o

The ratio of height of the image to the height of the object can be called magnification.

m = v/u = 3

v = 3 u

We know mirror formula as,

1/v + 1/u = 1/f

1/f = 1/u + 1/3u

1/f = (3+1)/3u

1/f = 4/3u

f = 3u/4 = 3(20)/4 = 15 cm

Let us find out image distance, 1/v = 1/f - 1/u

1/v = 1/15 - 1/20

1/v = 0.067 - 0.05

1/v = 0.017

Image distance v = 1/0.017 = 58.82 cm

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Individual cloud layers in the giant planets have different compositions. this happens because different volatiles freezes out at different temperatures.

Large, circular celestial objects that are neither stars nor their remnants are known as planets. The nebular hypothesis, which states that an interstellar cloud collapses out of a nebula to create a young protostar orbited by a protoplanetary disc, is the best theory currently available for explaining planet formation.

In meteorology, a cloud is an aerosol made up of a visible mass of minuscule liquid droplets, frozen crystals, or other particles suspended in a planetary body's atmosphere or a comparable environment. [2] The crystals and droplets could be made of water or a variety of different substances. When the air on Earth cools to its dew point or when it absorbs enough moisture (often in the form of water vapour) from a nearby source to the required temperature, it becomes saturated and forms clouds.

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The continent on the right would have has subduction-related magmatism before the collision.

Continental collision is a plate tectonic process that happens along convergent boundaries on Earth. Continental collision is a variation in subduction, in which the subduction zone is obliterated, mountains are formed, and two continents are sutured together. Continental collision is unique to this planet and provides a fascinating example of how our oceanic and continental crusts behave during subduction.

Continental collision is not an instantaneous process; it may take tens of millions of years for the faulting and folding produced by the collision to cease. The collision between India and Asia has been ongoing for over 50 million years and shows no signs of abating.

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Twisted-pair wiring is a category of cable that is comprised of four copper cables that have been wound around one another and encased in a plastic sheath.

Also with copper wires, twisted-pair cables were some of the first guided transmission medium. Twisted-pair cables are utilized in a variety of networking and communication applications today, including local area networks, digital subscriber lines, and phone lines.

The common copper cable known as twisted pair is used to link residential and commercial systems to the phone provider. Two copper pipe wires are wound around each other in a spirally to minimize electromagnetic induction or crosstalk between pairs of wires. Twisted pair connections require both wires for each connection.

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