The cosmic microwave background peaks at a wavelength of about 1 mm, and the universe has a temperature of about 3 K. If the microwave background peaked at a wavelength of 10 micrometers (10x10^-6 meters), what would its temperature be

The period of a rotating object is the time it takes for one complete revolution. In this case, the wheel takes 2.75 seconds to complete one revolution. its period is 2.75 seconds. The angular speed of the wheel is 235.62 radians per second.

The angular speed of the wheel is the rate at which it rotates in radians per second. To find the angular speed, we need to first convert the diameter to radius. The radius of the wheel is half of its diameter, so the radius is 107 cm. We then use the formula for angular speed, Angular speed = (2 x π x radius) / time where π is the mathematical constant pi (approximately 3.14). Substituting the values, we have: Angular speed = (2 x 3.14 x 107) / 2.75 Angular speed = 235.62 radians per second Therefore, the angular speed of the wheel is 235.62 radians per second.

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Answer:

Explanation:

Potential drop across R1, VR1

= Supply Voltage

= 24V

Well look at the diagram

We know

according to ohms law

\(\\ \rm\Rrightarrow \dfrac{V}{I}=R\)

\(\\ \rm\Rrightarrow \dfrac{V}{R}=I\)

Option C is correct

Answer:

Physics is the natural science that studies matter, its motion and behavior through space and time, and the related entities of energy and force.

Ancient history. Elements of what became physics were drawn primarily from the fields of astronomy, optics, and mechanics, which were methodologically united through the study of geometry. These mathematical disciplines began in antiquity with the Babylonians and with  writers such as Archimedes and Ptolemy.

Answer:

I don't know but It should exist or else reality would not exist

Explanation:

Answer:

400m

Explanation:

From Newton's law of motion;

S = ut + 1/2 at2

Where U is initial velocity

a is acceleration

t is velocity hence;

S is distance covered

S = 20×10 + 1/2 × 4×(10)^2

= 200 + 200 = 400m

Answer:

a low protein diet helps you lose weight because lack of protein can make you lose muscle mass

Explanation:

It cuts your strength it makes it harder to keep your balance and slows your metabolism and later you get tired easily it leads to muscle wasting overtime and sheds your fat

Answer:

This question is incomplete

Explanation:

This question is incomplete because of the absence of options. However, one material that is good candidate for conducting electricity without reacting with other materials is metallic vanadium dioxide. This is because of the inability of this electrical conductor to conduct heat (an unusual property for all other electrical conductors) and thus makes it difficult for it to react with other materials (since an increase in temperature increases possibility of a reaction).

Answer:

i hope it will help you

THANK YOU

Explanation:

thank you

Answer:

-2m/s^2

Explanation:

final velocity = 20m/s

initial velocity = 50 m/s

time taken = 60 s

20-50=30m/s

30/60 = -2

An electron is in a uniform electric field. With respect to the electric field direction, it experiences a force acting opposite to the electric field direction.

The electric field is defined as the electric force per unit charge. The direction of the field is taken to be the direction of the force it would exert on a positive test charge. The electric field is radially outward from a positive charge and radially in toward a negative point charge.

This occurs because electrons carry a negative charge, and the electric field direction is defined as the direction a positive charge would move. Since the electron is negatively charged, it experiences a force in the opposite direction of the electric field.

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Answer:

1. The three main acidic gases responsible for lowering the pH of rainwater are non-metal oxides produced by the burning of fossil fuels like coal, oil and natural gas. Sulfur dioxide is produced when fossil fuels containing sulfur impurities are burned.

2. A great way to reduce acid rain is to produce energy without using fossil fuels. Instead, people can use renewable energy sources, such as solar and wind power. Renewable energy sources help reduce acid rain because they produce much less pollution.

3. The pH scale is logarithmic, meaning that an increase or decrease of an integer value changes the concentration by a tenfold. For example, a pH of 3 is ten times more acidic than a pH of 4.

With the use of formulas,  the force of gravity on the satellite is 4563.8 N and the speed of the Satellites is 7764.5 m/s

It states that the force of attraction between two object is proportional to the product of the masses and inversely proportional to the square of the distance between them.

Assume that a satellite with a mass of 500kg orbits Earth 225km above its surface. Given that the mass of Earth is 5.97 x 10^24 kg and the radius of Earth is 6.38 x 10^6 m.

(A) The force of gravity that acts on the satellite will be

F = GMm/r²

Where

Substitute all the parameters

F = (6.67 × 10^-11 × 5.97 x 10^24  × 500)/6605000²

F = 4563.8 N

(B) The speed of the Satellites orbit will be

v = √GM/r

v = √(6.67 × 10^-11 × 5.97 x 10^24 )/6605000

v = √60287509.5

v = 7764.5 m/s

Therefore, the force of gravity that acts on the satellite is 4563.8 N and the speed of the Satellites orbit is 7764.5 m/s

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The following will decrease its frequency of oscillation The period is reduced to one-half of what it was.

Mass also affects the oscillation period. For example, a stiff spring with constant mass will oscillate for a short period, while increasing mass will oscillate for a long period. Using stiffer springs increases the frequency of the vibrating system.

Adding mass to a system lowers its resonant frequency. More mass means more inertia so you get more periods and this is also affected by the spring constant. The greater the spring constant the greater the force of the spring and thus the shorter the time.

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The force exerted on the charge 10q has a magnitude that is greater than F.

The force between two charged particles is given by Coulomb's law:

F = k * q1 * q2 / r^2

If we consider the system of two charges, q and 10q, and assume that they are at the same distance from the test charge:

\(F = k * q * qtest / r^2\)

where qtest is the charge of the test charge.

Similarly, the force on the test charge due to 10q is given by:

F' = k * (10q) * qtest / r^2

Dividing second equation by the first, we get:

F' / F =\((10q * qtest) / (q * qtest)\) = 10

So the force exerted on the charge 10q has a magnitude that is greater than the force exerted on the charge q by a factor of 10.

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Answer:

Δp = -2 p₀

Explanation:

The momentum is defined by

         p = m v

In this case we write the initial and final momentum, we take as positive the direction towards the wall.

         p₀ = m v

         p_f = m (-v)

the negative sign is because the car is bouncing off the wall

the change of the moment is

       Δp = p_f - p₀

        Δp = - m v - m v

        Δp = -2 mv

        Δp = -2 p₀

we see that the change of moment is twice the moment, in the attachment we can see the vectors of these changes and the sign indicates the direction of the change at the moment

1. True. The coefficient of kinetic friction is lower than the coefficient of static friction because it requires more force to overcome static friction and initiate motion compared to the force needed to maintain motion against kinetic friction.

2. A larger force of friction for the larger surface area.

1. The statement is true. The coefficient of kinetic friction is typically lower than the coefficient of static friction. Static friction arises when an object is at rest and resists the force applied to set it in motion. It takes more force to overcome static friction because the surfaces of the object and the surface it rests on are in closer contact and have more interlocking irregularities. Once the object is in motion, it experiences kinetic friction, which is usually lower because the surfaces slide past each other more easily. Therefore, it is generally more difficult to overcome static friction and initiate motion than it is to maintain motion against kinetic friction.

2. The correct answer is B) A larger force of friction for the larger surface area. Friction depends on the coefficient of friction and the normal force between the object and the surface it rests on. The larger surface area of the block in contact with the track will result in a greater normal force, which in turn leads to a larger force of friction. The increased contact area allows for more interactions between the block and the track, resulting in a stronger frictional force. Therefore, when testing the friction with the larger surface area of the block, one would expect to observe a larger force of friction compared to the smaller surface area configuration.

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Principal axis or optical axis is a virtual line that passes through

the center of the lens.

A lens is a transmissive optical tool that employs refraction to focus or disperse a light beam. A compound lens is made up of numerous simple lenses that are often aligned along a common axis, as opposed to a simple lens, which is made up of a single transparent piece.

Principal axis the line between the optical center and the centers of curvature of a lens's or a curved mirror's faces. Any one of three axis that are mutually perpendicular and around which a body has its greatest moment of inertia.

Principal axis or optical axis is a virtual line that passes through

the center of the lens.

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The correct explanation for the movement of the compass needle when the direction of the voltage on the battery is switched is (C) The current in the wire produced a magnetic field.

Voltage, also known as electric potential difference, is a measure of the electric potential energy per unit of charge in an electrical circuit. It is the force that drives the flow of electric charge in a circuit. Voltage is usually measured in volts (V) and is represented by the symbol "V".

When an electric current flows through a wire, it creates a magnetic field around the wire. The direction of the magnetic field depends on the direction of the current flow.

This magnetic field interacts with the Earth's magnetic field and causes the compass needle to move. Therefore, as the direction of the current in the wire changes when the voltage on the battery is switched, the direction of the magnetic field around the wire also changes, causing the compass needle to move.

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Answer:

\(29861.23\ \text{m/s}\)

Explanation:

\(R=\text{Radius of Earth's orbit}=1.5\times10^{11}\ \text{m}\)

\(T=\text{Time taken by the Earth to complete the orbit}=365.3\ \text{days}\)

Assuming the orbit is of circular shape the distance the Earth has to travel is the circumference

\(C=2\pi R\\\Rightarrow C=2\pi\times 1.5\times10^{11}\\\Rightarrow C=942477796076.938\ \text{m}\)

Velocity is given by

\(v=\dfrac{C}{T}\\\Rightarrow v=\dfrac{942477796076.938}{365.3\times 24\times 60\times 60}\\\Rightarrow v=29861.23\ \text{m/s}\)

The speed of the Earth around the Sun is \(29861.23\ \text{m/s}\)

Harlow Shapley assumed that the faraway globular clusters have the same average size as nearby globular clusters.

Shapley used the period-luminosity relationship of Cepheid variable stars to determine the distances to globular clusters in the Milky Way. He made a basic assumption that distant globular clusters have the same average size as nearby globular clusters. However, with the 100-inch telescope, he could not resolve variable stars in the more distant globular clusters. Therefore, he made the basic assumption that the faraway globular clusters have the same average size as nearby globular clusters. This allowed him to use the period-luminosity relationship to estimate their distances and to map the overall structure of the Milky Way galaxy.

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Answer:

40.90 mph if I did the math right

Answer:

Explanation:

Here the rope is 10m long and making an angle of θ with the  direction of canal or direction of flow of water in the canal .

sinθ =  2 / 10 = .2

θ = 11.5⁰

a )

Component of 500 N along the line perpendicular to the canal

= 500 sinθ  

= 500 sin 11.5

= 100 N

b )

component of 500 N along the canal

= 500 cos 11.5

= 490 N approx .

Answer:

Mass:  Choices 1, 2, 4, 6

Weight: Choices 3, 5, 7, 8

Hope this helped! Please mark Brainliest if correct.

The result of multiplying a particle's mass by its velocity is the fluctuation in momentum of a ball, which is 30 kg per second. Since momentum has both a magnitude and a direction, it is a vector quantity.

Almost every action that involves motion has momentum. It is an important tenet of physicsFor instance, if a team is moving forward and trying to stop, it will be difficult.

mv - mu, where u = 0 and v = 10 m/s, equals change in momentum.  Note that the ball moved from rest, therefore its initial velocity was zero (u = 0).

Momentum change is equal to mv mu, which is 3*10 - 3*0, or 30.

30 kg/s = change in momentum.

Momentum can be compared to the "power" a moving body has, or the amount of force it can exert on another body. For instance, a baseball that is thrown quickly (high velocity) and has a small bulk (big mass) can have the exact same momentum as a bowling ball that is travelling very slowly (low velocity).

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The mass of the satellite will remain the same when it is accelerated away from the Earth.

The mass of an object is a scalar quantity. This implies that mass of an object can be completely described with magnitude only.

The mass of every object in the universe is independent of the gravity and will always maintain the same value from place to place.

Thus, we can conclude that, the mass of the satellite will remain the same when it is accelerated away from the Earth.

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The correct answer is b. distance that a force acts, as it accurately describes the concept of work. The other options (a, c, and d) are not accurate descriptions of the relationship between impulse and work.

Impulse is defined as the change in momentum of an object and is calculated by multiplying the force applied to an object by the time interval over which the force is applied. It is directly related to the time duration of the force acting on an object. On the other hand, work is defined as the product of the force applied to an object and the distance over which the force is applied. It is a measure of the energy transferred to or from an object by the force.

Based on this understanding, the correct answer is B. distance that a force acts. The incorrect answers and their reasons:

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Answer:

25-0×7×7=25 i think that is it