what is the kinetic energy of the ball at position A

Answer: thermal energy, mechanical energy and, finally, electrical energy.

Explanation:

As a type of thermal power station, a coal-fired power station converts chemical energy stored in coal successively into thermal energy, mechanical energy and, finally, electrical energy. The coal is usually pulverized and then burned in a pulverized coal-fired boiler.

Answer:

Physical Balance

•Physical balance are utilized for precision mass measurement.

•Physical balance can measure accurately upto a milligram.

Beam balance

•Beam consists of a horizontal beam, supported at it's centre.

•The object is kept on one pan and the standard massess in the other.

Explanation:

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Answer:

The student can conclude that as the bulb is not lighting up so the object can be insulator

Explanation:

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The tangental acceleration of the flywheel of  radius 2.12 cm with a final angular velocity of 1820 rev/min and an angular acceleration of 16.2 rad/s is 0.34 m/s².

This is the rate of change of tangental velocity of an object in circular motion.

To calculate the tangental acceleration, we use the formula below.

Formula:

Where:

From the question,

Given:

Subsitute these values into equation 1

Hence, The tangental acceleration of the flywheel of  radius 2.12 cm with a final angular velocity of 1820 rev/min and an angular acceleration of 16.2 rad/s is 0.34 m/s².

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Answer:

D.

Explanation:

Specifically, Special Relativity showed us that space and time are not independent of one another but can be mixed into each other and therefore must be considered as the same object, which we shall denote as space-time. The consequences of space/time mixing are: time dilation. and length contraction.

Explanation:

Research in humans should be based on from library and animal experimentation . Research protocols should be reviewed by an independent committee prior to initiation

The most significant difference between the three point and the four-point starter is that in three-point starter the no voltage coil (NVC) is connected in series with the field winding whereas in four-point starter the NVC is directly connected to the supply voltage.

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Answer:

Uhm where are the questions and answers?

Answer:

Please see the file attached

Answer:

the nucleus

Explanation

(d) charge, which is a fraction of a coulomb is not possible.​

Explanation:

Quantisation implies that the charge, which is a fraction of a coulomb is not possible.​

Basic minimum charge = 1.6 x 10⁻¹⁹

Answer:

Option D

Explanation:

Let's see

According to quantization of charge property

So

it means that charge should be integer always like 5e,-7e ,3C etc.

But

frcation of coulomb denotes to rational number i e set Q hence its not possible

Answer:

D

Explanation:

because the glaciers melt adding more water into the sea which make the sea levels rise.

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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The height of the liquid column is 4.08 metres.

The peak of the liquid column is 4.08 metres.

As we realize that any liquid exerts a strain at a factor relies upon on the density of the liquid and the vertical intensity. depth is given = h and the acceleration because of gravity is g.

calculation:-

pressure = ρgh

ρ = density of the liquid

g = accaleration due to gravity

h = depth from the surface

l = 500kg/m3

p = 20,000

g = 9.8 ms-2

20,000Pa= 500*9.8*h

h=4.08m

The stress is the measure of pressure acting on a unit region. Density is the measure of the way intently any given entity is packed, or it is the ratio of the mass of the entity to its extent. The relation between strain and density is direct. exchange in stress will be contemplated in a exchange in density and vice-versa.

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Answer:

D -- 12

Explanation:

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Revolution and rotation are the terms that describe the different movements of the earth.

Our home planet is Earth. Earth and its moon, according to scientists, originated about the same period as the rest of the solar system.

That would have been around 4.5 billion years ago, according to scientists. Earth is the solar system's fifth-largest planet.

The rotation and revolution of the earth are two different movements. The movement of the earth on its axis is known as rotation.

Revolution is the movement of the earth around the sun in a fixed route or orbit. The earth's axis, which is an imaginary line, forms a 6612° angle with its orbital plane.

Hence revolution and rotation are the terms that describe the different movements of the earth.

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The order the boxes would land from slowest to quickest is A,C,B which is option C.

This is a device used to slow the motion of an object through an atmosphere by creating drag.

The size of the parachute affects the speed of falling because a larger parachute allows it to displace more air, causing it to fall more slowly. The one with three parachutes which is A will fall slowest and the one with just one will fall fastest.

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When a block is made of rough surfaces, the cylinders may eventually wear to the point where repairs are ineffective.

This is the force which occurs when two surfaces slide against each other. A rough surface have more friction than a smooth surface.

Friction causes wearing out of surfaces and may render repair works done ineffective in this case.

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Answer:

These two groups of planets are separated by the asteroid belt, a disk of small rocky bodies orbiting the sun between Mars and Jupiter.

Explanation:

Your welcome!

The two practices are;

The carbon dioxide emission results from the combustion of fossil fuels such as petrol, coal, firewood etc.

Carbon dioxide emission can be reduced through the following practices;

Thus, the two practices would most likely result in a decrease in carbon dioxide emissions are;

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Progressive overload is the gradual increase in stress to which we subject the body during training, where time, intensity and frequency are dimensions of it.

It is a training principle that emphasizes a progressive intensification of stress on the muscles.

It involves the systematic application of training stimuli that force the body to adapt and grow by manipulating the variables of frequency, time and intensity.

Therefore, we can conclude that progressive overload is the gradual increase in stress to which we subject the body during training, where  time, intensity and frequency are dimensions of it.

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Answer:

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune, Milky Way ;-;

Initial speed u= 0.0 m/s

Final speed v= 5.0 m/s

Time t1= 4.5s

Time for constant speed t2=4.5s

d = d₁ + d₂

1 = ( v+u/2) × 1₁ + v × 1₂

v = final speed

u = initial speed

t₁ = time for first accelerates

t2 = time for constant speed

d = (5+0/2) × 4.5+ 5.0 x 4.5

d = 33.75m

so, the total distance traveled by the bike is 33.75 m.

# 1

[tex]\bold{a = \frac{(5-0)}{4.5} = 1.11 m/s^2 }[/tex]

[tex]\bold{ v = 0 + a \: t = 1.11 \times 4.5 = 5 }[/tex]

[tex]\bold{ d = 0 + 0 (4.5) + (\frac{1}{2})(1.11)(4.5)^2 =11.2 }[/tex]

# 2

[tex]\bold{ a = 0 }[/tex]

[tex]\bold{ v = 5 }[/tex]

[tex]\bold{ d = 11.2 + 5 (4.5) + 0}[/tex]

[tex]\bold{ = 11.2 + 22.5 = 33.7 meters}[/tex]

Answer:

700 nanometer to one millimeter

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

✰ Concept :-

⠀

We know that momentum is the product of mass and velocity. Thus, by the following definition, we get :-

⠀

[tex] \qquad \maltese \: \underline{ \boxed{ \purple{ \sf Momentum = Mass \times Velocity }}} \: \star[/tex]

⠀

✰ Given Information :-

⠀

⠀

✰ To Find :-

⠀

⠀

✰ Solution :-

⠀

Using the formula from the concept section, we get :-

⠀

[tex]\sf \longrightarrow Momentum =10 \: kg \times 5 \: {m}^{ - 1} ~~~ \\ \\ \\\sf \longrightarrow Momentum = {50~kg \: ms}^{ - 1} \: \: \: \: \: \: \: \: \: \: \: \: \\ \\ \\ \sf \longrightarrow \underline{ \boxed{ \frak{ \orange{Momentum = {50 ~kg\: ms}^{ - 1} }}}} \: \star \: \: \: \: \: \: \\ \\ [/tex]

Thus, the momentum of the particle is 50 kg m/s.

⠀

[tex] \underline{ \rule{230pt}{2pt}} \\ \\ [/tex]