15. What drives the motions of the Earth's
atmosphere system?
A energy from the sun
B surface currents
C weather
D Earth's rotation

Answer:

See below

Explanation:

At A they add together (they are both positive)= construct

At B they destruct  ( one is neg and one is pos)

c  destruct      d destruct     e  construct (both neg)

So,  If the silica cyliner of the radiant wall heater is rated at 1.5 kw its temperature when operating is 1025.3 K

To estimate the operating temperature of the radiant wall heater, we need to use the equation for power radiated by the radiant wall heater.

The power radiated by the radiant wall heater is given by P = εσAT⁴ where

Since P = εσAT⁴

P = εσ(2πrh)T⁴

Making T subject of the formula, we have

T = ⁴√[P/εσ(2πrh)]

Since P = 1.5 kW = 1.5 × 10³ W

Substituting the values of the variables into the equation, we have

T = ⁴√[P/εσ(2πrh)]

T = ⁴√[1.5 × 10³ W/(1 × 6 × 10⁻⁸ W/m²-K⁴ × 2π × 6 × 10⁻³ m × 0.6 m)]

T = ⁴√[1.5 × 10³ W/(43.2π  × 10⁻¹¹ W/K⁴)]

T = ⁴√[1.5 × 10³ W/135.72  × 10⁻¹¹ W/K⁴)]

T = ⁴√[0.01105 × 10¹⁴ K⁴)]

T = ⁴√[1.105 × 10¹² K⁴)]

T = 1.0253 × 10³ K

T = 1025.3 K

So, If the silica cylinder of the radiant wall heater is rated at 1.5 kw its temperature when operating is 1025.3 K

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Answer:

PE is related to the ability to do work, If an item is sitting on  a shelf

it has potential energy relative to its position on the floor, However, if the object were to fall it would hit the floor with a KE equal to the PE that it had sitting on the shelf.

Sounds are caused by compressional waves in  the air - when a piano key is struck or a TV is turned on, then compressional waves are produced in the surrounding air due to a disturbance. The human ear recognizes the disturbed air as due to the object that created the disturbance.

Explanation:

V = S/t

s =vt

d = 20 x 5

d = 100m

The position of the ball 5 seconds after it was thrown will be 25 m below the edge of building.

What are the three equations of motion?

The three equations of motion are -

v = u + at

S = ut + 1/2at²

v² - u² = 2aS

Given is an object which is thrown straight upward from the edge of a building with a velocity of 20m/s.

Initial velocity [u] = 20 m/s

Acceleration due to gravity [g] = - 10 m/s² (Rounded off 9.8)

At maximum height, the velocity will be 0.

Assume that the time at which the ball reaches max height be T.

Using first law of motion -

v = u + aT

0 = 20 - gT

gT = 20

T = 20/g

T = 20/10

T = 2 sec

Then -

S[max] = 20 x 2 - 0.5 x 10 x 4

S[max] = 40 - 20 = 20 m

At t = 2 sec the ball will be at maximum height. Now at maximum height, the initial velocity of the ball will be 0.

We have to find the position of ball after 3 seconds as after 2 seconds it was at maximum height.

In this case initial velocity will be [u] = 0

Acceleration [a] = 10 m/s²

Time [t] = 3 sec

Using second equation of motion -

S = ut + 1/2at²

S = 0.5 x 10 x 9

S = 45 m

Position of object = [x] = 20 - 45 = - 25 m

The negative sign indicates that the object is now 25 cm below from the edge of building.

Therefore, the position of the ball 5 seconds after it was thrown will be 25 m below the edge of building.

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The net vertical force on the caboose (C) is

∑ F[v, C] = F[n, C]  - (1.4 kg) g = 0

where F[n, C] is the magnitude of the normal force exerted by the track on the caboose; so we have

F[n, C] = (2.3 kg) g = 13.72 N

which means the coefficient of kinetic friction µ between the caboose and the track is

F[f, C] = 0.46 N = µ (13.72 N)   ⇒   µ = (0.46 N) / (13.72 N) ≈ 0.034

and presumably the coefficient is the same for the locomotive.

The net vertical force on the locomotive (L) is

∑ F[v, L] = F[n, L] - (2.3 kg) g = 0

where F[n, L] is the magnitude of the normal on the locomotive, so that

F[n, L] = (2.3 kg) g = 22.54 N

and so the locomotive is opposed by a frictional force with magnitude

F[f, L] = µ (22.54 N) ≈ 0.76 N

Taking the locomotive and caboose together, the net horizontal force on the system is

∑ F[h] ≈ - F[f, C] - F[f, L] + F[engine] = (2.3 kg + 1.4 kg) (3.1 m/s²)

Solve for F[engine] :

F[engine] ≈ (3.7 kg) (3.1 m/s²) + 0.46 N + 0.76 N ≈ 13 N

Since unbalanced forces acts on the spheres, the aim of increasing the release distance of the spheres is to observe the effect of unbalanced forces acting on the spheres.

An experiment is a study whose objective is to study cause and effect relationships. In this case, the students had to increase the distance at which the spheres was released.

The aim of increasing the release distance of the spheres is to observe the effect of unbalanced forces acting on the spheres.

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When the ball on a spring is replaced by a smaller ball with half the mass :  The period decrease by 29%

We will apply the formula below to calculate period

T = [tex]2\pi \sqrt{\frac{m}{k } }[/tex]

 where :

T₁ / T₂ = [tex]\sqrt{\frac{m_{1} }{m_{2} } }[/tex]    where m₂ = m₁ / 2

Therefore :

T₂ = [tex]\frac{T_{1} }{\sqrt{2} }[/tex]   = 0.71 T

Hence we can conclude that the period will decrease by 29% ( i.e 100 - 71 ).

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(a) The launch angle of the ball is 5⁰.

(b) The actual speed of the ball when it leaves the person's hand is 35.13 m/s.

(c) The maximum height reached by the ball is 0.46 m.

(d) The time spent in air by the ball is 0.26 s.

(e) The horizontal distance traveled by the ball on the road is 4.55 m.

The launch angle of the ball is calculated as follows;

[tex]tan(\theta) = \frac{V_y}{V_x} \\\\\theta = tan^{-1} (\frac{3}{35} )\\\\\theta = 5\ ^0[/tex]

The actual speed of the ball when it leaves the person's hand is calculated as follows;

[tex]V = \sqrt{V_x^2 + V_y^2} \\\\V = \sqrt{(35)^2 + (3)^2} \\\\V = 35.13 \ m/s[/tex]

The maximum height reached by the ball is calulated as follows;

[tex]Vy_f^2 = V_y_i^2 - 2gh\\\\0 = 3^2 - 2(9.8)(h)\\\\19.6h = 9\\\\h = \frac{9}{19.6} \\\\h = 0.46 \ m[/tex]

The time spent in air by the ball is calculated as follows;

[tex]h=V_yt + \frac{1}{2} gt^2\\\\0.46 = 3t + 4.9t^2\\\\4.9t^2 +3t - 0.46 = 0\\\\a = 4.9, \ b = 3, \ c =- 0.46\\\\t = \frac{-b \ \pm \ \sqrt{b^2 - 4ac} }{2a} \\\\t = 0.13 \ s[/tex]

Total time for upward and downward motion  = 2(0.13 s) = 0.26 s

X = Vx(t)

X = 35 x 0.13

X = 4.55 m

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Organic materials comes from living things while inorganic materials comes from non living things

Organic materials are those composed mainly of carbon they are derived from living things while inorganic materials are derived from non living things sucjh as rocks etc

The amount of electricity a fuel cell system produces is boost by combined to form a fuel cell that is battery.

A battery is a device that uses an electrochemical oxidation-reduction (redox) cycle to turn the chemical energy included in its active components directly into electric energy. An electric circuit is used in this kind of reaction to transmit electrons from one substance to another.

The actual elector-chemical unit used to produce or store electric

For this one it should be A single fuel cell generates approximately one volt of electricity. Individual fuel cells are combined to form a fuel cell stack to enhance the amount of electricity produced.

The amount of electricity a fuel cell system produces is boost by combined to form a fuel cell that is battery.

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Answer:

They sit or lay quietly

Explanation:

That's what they are trained to do when they find a explosive device

Continuous signals are characterized as analog signals that are broken up into binary code are characterized as digital.

An am/fm radio is a good example of analog technology. A smart phone is a good example of digital technology.

These are devices that generate, store or process data while analog is a continuous signal that represents physical measurements.

The examples of analog and digital technology are mentioned above and is the most appropriate choice.

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Answer:

Analog, Digital, Analog, Digital

Explanation:

edge 2022

Answer:

One way people are using technology to protect the environment is:

Using digital devices for communicating and storing information means that there is less reliance on paper, which reduces deforestation. Since trees are an important source of oxygen and also absorb carbon dioxide, this further reduces climate change.

Environmental technology has enabled us to capture this naturally occurring energy and convert it into electricity or useful heat through devices such as solar panels, wind, and water turbines.

Explanation:

Have a great of your day
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Answer:

The answer is increases.

Explanation:

When positive charge is shifted from a low potential to a high potential region, the electric potential energy increases.

Explanation:

Electric potential energy directly depends upon potential region

Charge always flows from higher density to lower density in case of negative and for positive charge it's vice versa

Hence correct choice is option B

Answer:

"A pendulum swinging back and forth" is an example of harmonic motion

X = Xo cos ω t

Explains the back and forth motion of the pendulum

The thermal energy from nuclear reactions is first converted to mechanical energy and finally to electrical energy for use by the community.

Nuclear energy is the energy produced as a result of changes that occur in the nucleus of atoms of elements. These changes are known as nuclear reactions.

Electrical energy can be generated from nuclear reactions.

The steps in the generation of electrical energy from nuclear reactions is as follows:

Therefore, the thermal energy from nuclear reactions is converted to electrical energy for use by the community.

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Answer:

It is when the focus of the ellipse that is closer to the point where Mars is moving the fastest.

Explanation:

I hope it helps! Have a great day!

Anygays-

Speed, frequency and wavelength are interconnected to each other.

As a wavelength increases in size, its frequency and energy (E) decrease. As the frequency increases, the wavelength gets shorter. As the frequency decreases, the wavelength gets longer.

The wave speed is equal to the product of its frequency and wavelength, which shows the relationship between frequency and wavelength.

So we can conclude that speed, frequency and wavelength are interconnected to each other.

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Answer: No

Explanation:

There are a few explanations as to why. I'm not sure as to what level of an explanation you are looking for. A person's body is made of atoms, which have constant motion due to multiple processes. An atom can never ever be frozen to absolute zero motion, we can only approach that value. Therefore, we will always have kinetic energy. Another explanation is Einstein's famous formula E = mc^2. This is the rest mass energy, which all things with mass obey. There is an energy-mass equivalence.

The velocity of the monitor as it hits the ground is equal to 40.58 m/s.

Given the following data:

Scientific data:

In accordance with the law of conservation of energy, the potential energy possessed by the monitor at the roof top would be equal to the kinetic energy possessed by the monitor at the ground:

[tex]PE=KE\\\\mgh=\frac{1}{2}mv^2\\\\2mgh=mv^2\\\\V=\sqrt{2gh}\\\\V=\sqrt{2 \times 9.8 \times 84}\\\\V=\sqrt{1646.4}[/tex]

V = 40.58 m/s.

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Answer:

"One calorie of heat is defined as the amount of heat needed to raise the temperature of one gram of water by one degree Celsius"

Hope this Helps!

Explanation:

One calorie of heat is defined as the amount of heat needed to raise the temperature of one gram of water by one degree Celsius (or one kelvin).

Answer:

See below

Explanation:

a  PE only...the ball is not moving

b and c     PE  and KE

d  KE only  

e and f      PE and KE

The energy of the ball at its highest position is potential energy.

The law of conservation of energy states that, energy can neither be created nor destroyed. Despite this, it is capable of changing its form. The sum of the energies in an isolated system is constant regardless of the types of energy present.

Here,

According to law of conservation of energy, at each position of the ball, it will have some amount of energy.

At point A

The ball is at its highest position, that means maximum height. So, the energy of the ball at that position is potential energy and it doesn't have any kinetic energy.

At points B and C

At these positions the ball is moving downwards. That means the potential energy is being converted into kinetic energy of the ball. So, it has both PE and KE.

At point D

The ball is at the lowest position, on the ground. So, the potential energy is zero. Therefore, it has the kinetic energy.

At points E and F

At these positions, the ball is moving upwards. So, it has both PE and KE.

Hence,

The energy of the ball at its highest position is potential energy.

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Answer:

D)it decreases to 1/9 its original magnitude

Answer:

Striking the head of the drum changes its shape and compresses the air inside the shell. The compressed air presses on the bottom head and changes its shape. Then, these changes are transmitted to the drum shell and reflected back, and this action is repeated, creating a vibration. These vibrations of the top and bottom heads create vibrations in the air, which become sound, and eventually, as the head vibrations are dampened, the sound diminishes.

Explanation:

Answer:

Earth's magnetic field serves to deflect most of the solar wind, whose charged particles would otherwise strip away the ozone layer that protects the Earth from harmful ultraviolet radiation.

Answer:

Earth's magnetic field serves to deflect most of the solar wind,

whose charged particles would otherwise strip away the ozone layer that

protects the Earth from harmful ultraviolet radiation.

Answer:

Explanation:

Answer:

C. answer pa brailest need lang po please

D. Resource Supply this would be directly affected first then the rest would follow after a period of time.

Answer:

75000kg m/s

Explanation:

Momentum = Mass X Velocity

p = mv

3000 X 25 = 75000 kg m/s