Why is the sky blue

A. It's lonely and sad
B. Gases and particles in Earth's atmosphere scatter sunlight in all directions
C. Because it absorbs all colors except blue

Answer:

a = 0.3 m/s²

Explanation:

Given: 45 N, 150 kg

To find: a

Formula: \(a = \frac{F}{m}\)

Solution: To find a, divide the force by the weight  

A = F ÷ m

=  45 ÷  150

= 0.3 m/s²

Newtons are derived units, equal to 1 kg-m/s². In other words, a single Newton is equal to the force needed to accelerate one kilogram one meter per second squared.

❄ Hi there.

a pencil is composed mostly of wood.

Let's check if the other choices are right.

A. Sweaters are not made of wood

B. Tiles are not made of wood

C. Pencils are made of wood

D. Bricks are not made of wood

∴ the right choice is C.

❄

Answer:

C. Newton

Explanation:

hope this helped:)

Answer:

Evaluate the solution.

Explanation:

A technological design is designed as the design and study of a solution that can be provided from the solution by identifying the root cause or problem and trying to solve by various means.

A good technological design requires the minimum effort and resources while meeting the requirement of the problem.

The steps involved in the technological design are :

1. search and identify the problem or need.

2. design a solution

3. Implement a solution.

4. Evaluate the solution.

Therefore, the final step or the fourth step in the process of a technological design is " evaluating or communicating the final design solution".

a) If S is a subspace of vector space V, then the span of S, (S), is equal to S itself.

To show that if S⊆V, then (S) = S, we need to prove two inclusions:(i) (S) ⊆ S:
By definition, (S) is the smallest subspace of V that contains S. Since S⊆(S), it follows that every element in S is also in (S). Therefore, S is a subset of (S).(ii) S ⊆ (S):
Let's consider S as a subspace of V. Since S is already a subspace, it satisfies all the properties of a vector space, including closure under scalar multiplication and addition. Therefore, S is a subset of itself.
Combining both inclusions, we conclude that (S) = S.

b)The span of the union of subspaces W₁ and W₂, (W₁ ∪ W₂), is equal to the sum of W₁ and W₂, denoted by W₁ + W₂.

To show that (W₁ ∪ W₂) = W₁ + W₂, we need to prove two inclusions:
(i) (W₁ ∪ W₂) ⊆ W₁ + W₂:
Let's take an element x from (W₁ ∪ W₂). This means that x is an element of either W₁ or W₂ (or both). If x∈W₁, then x is in the subspace W₁, and therefore, it is also in the sum W₁ + W₂. Similarly, if x∈W₂, then x is in the subspace W₂, and hence it is also in the sum W₁ + W₂. Therefore, any element x from (W₁ ∪ W₂) is also in W₁ + W₂, which implies (W₁ ∪ W₂) ⊆ W₁ + W₂.
(ii) W₁ + W₂ ⊆ (W₁ ∪ W₂):
Let's take an element y from W₁ + W₂. By definition, this means that y can be expressed as the sum of an element in W₁ and an element in W₂. Therefore, y is either an element of W₁ or an element of W₂ (or both), and hence y is in the union (W₁ ∪ W₂). Therefore, any element y from W₁ + W₂ is also in (W₁ ∪ W₂), which implies W₁ + W₂ ⊆ (W₁ ∪ W₂).Combining both inclusions, we conclude that (W₁ ∪ W₂) = W₁ + W₂.

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Answer:

its b

Explanation:

Answer:

370.3J

Explanation:

A 10 kg ball is rolled to the top of a hill 37 m high using 4000 J of work. How much energy was lost due to heat?

Step one:

given data

mass m= 10kg

height of the hill= 37m

work done= 4000J

Step two:

The quantity of energy loss due to heat is the same as the difference in the  potential energy possed by the mass and the work done

PE= mgh

PE=10*9.81*37

PE= 3629.7J

Hence the energy loss is

= 4000-3629.7

=370.3J

Answer:

200 m / min

Explanation:

Total distance = 2000 m

Total time = 2+4+1+3 = 10 minutes

Average speed = 2000 m / 10 min = 200 m/min

The density of the wooden cube is approximately 0.746 g/cm³.

Density is a physical property that describes how much mass a substance has per unit volume. It is typically measured in grammes per cubic centimetre (g/cm3) or kilogrammes per cubic metre (kg/m3).

The formula for density is:

Density = Mass / Volume

The density (ρ) of an object is defined as its mass per unit volume, and can be calculated using the formula:

ρ = m / V

where ρ is the density in units of mass/volume (e.g. g/cm^3), m is the mass of the object, and V is its volume.

In this case, we are given the mass of a wooden cube (m = 59.3 g) and the edge length of the cube (l = 4.30 cm). To calculate the volume of the cube (V), we can use the formula for the volume of a cube:

V = l³

Substituting the given values, we get:

V = (4.30 cm)³ = 79.51 cm³

Now we can calculate the density:

ρ = m / V = 59.3 g / 79.51 cm^3 ≈ 0.746 g/cm^3

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Answer:

B

Explanation:

the external force was applied

Answer:

so the answer is number one which is A

B Answer:

Explanation:

bc I just did it and got it wrong

Answer:

The answer to your problem is, D. 174 m/s

Explanation:

Formula:

wave speed = frequency * wavelength

Speed of wave = 2Hz × 87m ( Look at question for the numbers )

Speed of wave = 174m/s

Simple math..

Thus the answer to your problem is, 174m/s

The magnitude of the magnetic field at a distance r is given by 8 × 10^-6 T·m divided by r.

Ampere's law states that the line integral of the magnetic field around a closed loop is equal to the product of the current enclosed by the loop and the permeability of free space.
In this case, we have two parallel wires carrying currents of 14 A and 30 A. Let's consider a closed loop around the first wire. The current enclosed by this loop is 14 A. Applying Ampere's law, we have:
∮B⋅dl = μ₀ × 14 A
The left-hand side of the equation represents the line integral of the magnetic field around the loop. The right-hand side represents the product of the current and the permeability of free space, μ₀.
Since the wires are parallel and right next to each other, the magnetic field due to the first wire will be in the opposite direction to the magnetic field due to the second wire. Therefore, the net magnetic field at a distance r from the wire will be the difference between the magnetic fields due to the two wires.
Using the Biot-Savart law, we can find the magnetic field due to each wire at a distance r. The magnetic field due to a long, straight wire is given by:
B = (μ₀ × I) / (2π × r)
Plugging in the values, we get:
B1 = (μ₀ × 14 A) / (2π × r)
B2 = (μ₀ × 30 A) / (2π × r)
The net magnetic field Bnet at a distance r from the wire is the difference between B2 and B1:
Bnet = B2 - B1
Simplifying the equation, we have:
Bnet = [(μ₀ × 30 A) - (μ₀ × 14 A)] / (2π × r)
Bnet = (μ₀ × 16 A) / (2π × r)
Finally, we can substitute the value of the permeability of free space, μ₀, which is approximately 4π × 10^-7 T·m/A, to find the magnitude of the magnetic field Bnet at a distance r:
Bnet = (4π × 10^-7 T·m/A × 16 A) / (2π × r)
Bnet = (8 × 10^-6 T·m) / r

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A particle in uniform circular motion requires a net force acting towards the center of the circle. So option A is correct.

The net force acting on a particle moving in a circular path is always directed towards the center of the circle. The motion of a particle in a circular path is characterized by the direction of its velocity and acceleration at each instant in time. These two vectors are always perpendicular to each other.The magnitude of the net force required to keep a particle in uniform circular motion depends on the mass of the particle and its velocity, as well as the radius of the circular path it is following. This force is referred to as the centripetal force and is always directed towards the center of the circle.The centripetal force is provided by some other object, such as a string or a gravitational field, which acts to pull the particle towards the center of the circle. Without this force, the particle would continue to move in a straight line tangent to the circle, rather than in a circular path.Therefore option A is correct.

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Answer:

it's D

Explanation:

its on edge

True. The concentration of a pollutant resulting from a continuous emission is directly proportional to wind speed.

This means that as wind speed increases, the concentration of the pollutant in the air also increases.The concentration of a pollutant in the atmosphere is determined by the balance between the emission of the pollutant and its dispersion (by wind and convection). As wind speed increases, the dispersion of the pollutant is increased, resulting in a decrease of the concentration of the pollutant in the atmosphere. Therefore, the concentration of a pollutant is inversely proportional to the wind speed.Conversely, lower wind speed will cause the pollutant to be dispersed more slowly and over a smaller area, resulting in a higher concentration.

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Answer:

A.) Find the attached file

B.) 1.536 J

C.) 123N

Explanation:

Given that the force (F) in Newtons, of his breath as a function of the distance along the straw (x) in meters, can be modeled as a linearly decreasing function for the first half of the straw,

Half of the straw = 12.5 cm

Let Force F = dependent variable

And distance x = independent variable

A.) Find the attached file for the graph.

Sinnce the force decreases by half along the first half of the straw. Assume there is negligible friction and the straw is held horizontally

B.) Given that the mass M = 12g = 12/1000 = 0.012kg

And Velocity V = 16m/s

The workdone = the kinetic energy of the split ball

WD = 1/2mv^2

Substitutes m and V into the formula

WD = 1/2 × 0.012 × 16^2

WD = 1.536 Joule

C.) The maximum force acts on the spit ball will be at maximum kinetic energy.

Since work done = force × distance

Where distance = 12.5 cm

F × S = 1/2mv^2

Substitutes all the parameters

F × 0.0125 = 1.536

Make F the subject of formula

F = 1.536/0.0125

F = 122.88 N

The maximum force F0, that acts on the spitball is therefore equal to 123 N approximately.

We have that for the Question "(a) Sketch a plot of the force of his breath as a function of position along the straw, labeling the force at x = 0 as F0.

(b) If the spitball begins from rest and leaves the straw with a speed of 16 m/s, how much work is done on the spitball?

(c) What is the maximum force F0, that acts on the spitball?"

It can be said that

From the question we are told

mass of spitball = 12g through a 25.0 cm straw

Generally the equation for workdone is mathematically given as

\(= \frac{1}{2}mv^2 - 0\\\\= \frac{1}{2} * 12*10^{-3} * 16^2\\\\= 1.536J\)

Maximum force

\(w = \frac{1}{2}*\frac{x_0}{2}*\frac{F_0}{2} + x_0*\frac{F_0}{2}\\\\w = \frac{5}{8}x_0F_0\)

Therefore,

\(F_0 = \frac{8w}{5x_0}\\\\F_0 = \frac{8*1.536}{5*25*10^[-2]}\\\\F_0 = 6.4N\)

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When the mirror is moved so that the tree is between the focus point F and the mirror, the image appears shorter and on the same side of the mirror.This happens because of the phenomenon known as Reflection of Light. The mirror reflects light in such a way that it appears as if the light is coming from behind the mirror.

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Answer:

Explanation:

{ r, θ ) = [ r cosθ i , r sinθ j ]

( 95m , 162°) = [ 95 cos 162 i, 95 sin 162 j]

( 95m , 162°) = [ 95 * -0.951 i, 95 * 0.309 j]

( 95m , 162°) = -90.342 i, 29.355 j =

[ -90.34 m i , 29.36 m j ]

Therefore, the displacement of x and u components are

x displacement = -90.35 m and y displacement = 29.36 m

round appropriately

the net impulse that acted on the ball =500 N.s if 100 kg ball is initially traveling at 10 m/s. If the ball experiences a constant external force that increases the ba velocity to 15 m/s .

The normal force acts in a direction normal to the surface interaction between objects. Friction is a force that opposes motion on surfaces. Other examples of non-fundamental forces include the elastic force, tension, and frame-dependent forces .

to make someone do something that they do not want to do, for example by using or threatening to use violence. force someone to do something: He claims that police officers forced him to sign a confession.

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Answer:

SI units are the physical units of measurement. SI units include kilogram, meter, second, ampere, kelvin, candela, and mole etcetera.

SI units are very important for daily life while measuring daily life commodities, such as:

Without SI units, it would be difficult to meausre the amount of object required or any other measurement object.

Answer:

Explanation:

because we have to get a measuremt.

Answer:

We were told that there are 9 planets if "Pluto" is included as a planet.

Matilda visits every monday  just stays  until noon - period

mercury, venus, earth, mars, jupiter, saturn, uranus, neptune, pluto

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune are the planet order from the Sun.

With the a biography, illustrations, and his dedication from "Of the Revolutions of the Heavenly Bodies," Nicolaus Copernicus is recognized to as the "Father of the Solar System."

Eight planets, 146 moons, a number of comets, asteroids and other space rocks, ice, and numerous dwarf planets, namely Pluto, make up our solar system. The Sun is the single star in the system.

Previous to the likes of Copernicus, Kepler, and Galileo, no one was really sure what those immense bright lights in the sky even were, and everyone believed that the planets (that they were conscious of) revolved around Earth.

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Answer:

In an year about 6 major hurricanes and 3 minor storms occurs.

Explanation:

Answer:

Explanation:

Pooh Shiesty, that's my dawg

But Pooh, you know I'm really shiesty

You told all them O.T. ni  ggas that you really slide

Tell the truth about your gang, they really dyin'

I got my own fire, don't need security in the club

All that woofin' on the net , I thought you was a thug

They ain't got nowhere to go, I sh0t up everywhere they was

Yeah, you know who took that - from you

Come get it back in blood

Come get it back in blood

\(\\ \sf\Rrightarrow V=\dfrac{W}{Q}\)

\(\\ \sf\Rrightarrow V=\dfrac{9}{1}\)

\(\\ \sf\Rrightarrow V=9V\)

When the outer envelope of a red giant is ejected, the remaining core of a low mass star is called a white dwarf.

A white dwarf is a dense, hot object that no longer undergoes nuclear fusion. It is mainly composed of carbon and oxygen, and is supported by electron degeneracy pressure. The core of the white dwarf gradually cools down over billions of years, eventually becoming a cold, dark object known as a black dwarf. Therefore, When the outer envelope of a red giant is ejected, the remaining core of a low mass star is called a white dwarf.

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When the outer envelope of a red giant is ejected, the remaining core of a low mass star is initially called a planetary nebula, and eventually, it becomes a white dwarf.

When a low mass star nears the end of its life, it goes through a phase called the red giant phase. During this phase, the star's core begins to contract while its outer envelope expands, causing the star to increase in size and become less dense. Eventually, the outer envelope of the red giant becomes unstable and starts to drift away from the core. This process is known as a stellar wind or mass loss.

As the outer envelope is ejected, it forms a glowing cloud of gas and dust surrounding the central core. This cloud is called a planetary nebula. Despite its name, a planetary nebula has nothing to do with planets. The term was coined by early astronomers who observed these objects and thought they resembled planetary disks.

The remaining core of the low mass star, which is left behind after the ejection of the outer envelope, undergoes further transformation. It becomes a white dwarf, which is a hot, dense object composed mainly of carbon and oxygen. A white dwarf is the final evolutionary stage of a low mass star, where it no longer undergoes nuclear fusion and gradually cools down over billions of years.

In summary, when the outer envelope of a red giant is ejected, the remaining core of a low mass star is initially called a planetary nebula, and eventually, it becomes a white dwarf.

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