Which type of heat transfer takes place in gases by the movement of particles through a medium?

25/2=12.5s

12.5*9.8=122.5 m/s

Explanation:

where I is the current, L is the length of the wire, and B is the magnetic field.

If we point our right-hand thumb in the direction of the current (to the right), and our fingers in the direction of the magnetic field (away from us), then our palm will point in the direction of the force.

Answer:

If you have an initial velocity of 1.5m/s and the ramp height is 4.5, and an extreme fart is initiated at the bottom of the ramp exerting an didditional upward force, and the smell of the fart causes you to begin flailing, and everyone running from you causes an additional wind force, then you would be rolling at a speed of 3 m/s given there is no friction. :)

Answer:

400 W

Explanation:

Ignoring the efficiency rating for the transformer we have to assume 100% .. Also, the power input to primary is equal to the power output in secondary.

This means that power input = 400 W = power output

The law of conservation of mass states that matter cannot be created or destroyed.

The law of conservation of mass states that the mass of the reactant must be equal to the mass of the product.

In 18th century law of conservation of mass was given by Levoisier.

It states that mass is neither created nor destroyed.

Example -

The law of conservation of mass states that matter cannot be created or destroyed.

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Answer:

it depends on the wind and any other conditions but if you have a controlled environment it should take 1 second to get 40 meters but it could go higher in which it could take about 5 seconds to go 200 meters

Explanation:

hope it helped

:)

Using the Suvat equations, a car of mass 2000 kg accelerates from 0 to 30 m/s in 5.5 seconds, so the mean resultant force on the car during the 0–30 m/s acceleration period is 10,900 N.

Using the following suvat equation,

v = u + at

( v = final velocity (30 m/s), u= initial velocity (0 m/s), a= acceleration (not known), and t = time taken (5.5 s). )

a = (v - u) / t

a = (30 m/s - 0 m/s) / 5.5 s

a = 5.45 m/s²

applying Newton's second law of motion,

Force = Mass x Acceleration

Force = 2000 kg x 5.45 m/s²

Force = 10,900 N

Hence, the mean resultant force on the car during the 0–30 m/s acceleration period is 10,900 N.

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The true statement about the electric potential for the equipotential surface is  \(V_A = V_B = V_C\)

A surface with an equipotential potential is one where all points on the surface have the same electric potential. .

That is an equipotential surface is that surface at every point of which, the electric potential is the same.

The formula for the potential across every point on the surface is given as;

V = F/Q x R

V = ER

where;

Since the surface is equipotential with uniform electric across the surface, the electric potential at any point across the surface will be the same.

So \(V_A = V_B = V_C\)

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Angle of deviation can be defined as the angle between the incident ray and the emergent ray when light passes through a prism.

When speaking of Angle of deviations, the incident ray is the ray of light that hitss the prism, while the emergent ray is the ray of light that emerges from the prism.

The angle of deviation is noted to be always greater than zero, and it can be used to calculate the refractive index of the prism.

The angle of deviation can be calculated using δ = i + r - A

δ is the angle of deviation

i is the angle of incidence

r is the angle of refraction

A is the angle of the prism

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Answer:

The galaxies outside of our own are moving away from us, and the ones that are farthest away are moving the fastest. This means that no matter what galaxy you happen to be in, all the other galaxies are moving away from you

Explanation:

The hypothesis about the movement of the galaxy is that galaxies are moving far from each other continuously.

The milky way galaxy is a galaxy that contains over a hundred billion stars and it also includes our solar system.  Its name describes its appearance when viewed from the earth. All the individual stars in the whole sky are a portion of the Milky Way Galaxy, the term "Milky Way" is because of the band of light.

The astronomer has discovered a new galaxy which means our universe is continuously expanding. This is because the universe encloses everything that exists.

Galaxies are moving in space and since the universe space is continuously expanding so the galaxies continuously move from each other. The farther the galaxy is from the milky way which is an observable part, the faster will be moving the galaxy and the closer the galaxy is to the milky way, the slower will be movement of the galaxy.

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Answer:

a) 3.632 m/s

b) 0.462 m/s

Explanation:

Using the law of conservation of momentum:

\(m_{1} u_{1} + m_{2} u_{2}= m_{1} V_{1} + m_{2} V_{2}\)..........(1)

\(m_{1} = 0.30 kg\\u_{1} = 2.4 m/s\\m_{2} = 0.80 kg\\u_{2} = 0 m/s\)

Substituting the above values into equation (1) and make V2 the subject of the formula:

\(0.3(2.4) + 0.80(0)= 0.3 V_{1} + 0.8 V_{2}\\\)

\(V_{2} = \frac{0.72 - 0.3 V_{1}}{0.8}\)..................(2)

Using the law of conservation of kinetic energy:

\(0.5m_{1} u_{1} ^{2} + 1.2 = 0.5m_{1} V_{1} ^{2} + 0.5m_{2} V_{2} ^{2}\\0.5(0.3) (2.4) ^{2} + 1.2 = 0.5(0.3) V_{1} ^{2} + 0.5(0.8)V_{2} ^{2}\\\)

\(2.064 = 0.15 V_{1} ^{2} + 0.4V_{2} ^{2}\).......(3)

Substitute equation (2) into equation (3)

\(2.064 = 0.15 V_{1} ^{2} + 0.4(\frac{0.72 - 0.3V_{1} }{0.8}) ^{2}\\2.064 = 0.15 V_{1} ^{2} + 0.4(\frac{0.5184 - 0.432V_{1} + 0.09V_{1} ^{2} }{0.64}) \\1.32096 = 0.096 V_{1} ^{2} + 0.20736 - 0.1728V_{1} + 0.036V_{1} ^{2} \\0.132 V_{1} ^{2} - 0.1728V_{1} - 1.1136 = 0\\V_{1} = 3.632 m/s\)

Substituting \(V_{1}\) into equation(2)

\(V_{2} = \frac{0.72 - 0.3 *3.632}{0.8}\\V_{2} = \frac{0.72 - 0.3 *(3.632)}{0.8}\\V_{2} = 0.462 m/s\)

Answer:

The appropriate solution is:

(a) \(\frac{1}{4}(I_o)\)

(b) \(\frac{1}{4} (u_o)\)

(c) \(\frac{1}{2}B_o\)

Explanation:

According to the question, the value is:

Power of bulb,

= 60 W

Distance,

= 1.0 mm

Now,

(a)

⇒  \(\frac{I}{I_o} =\frac{r_o_2}{r_2}\)

On applying cross-multiplication, we get

⇒  \(I=I_o\times \frac{1_2}{2^2}\)

⇒     \(=I_o\times \frac{1}{4}\)

⇒     \(=\frac{1}{4} (I_o)\)

(b)

As we know,

⇒ \(\frac{u}{u_o} =\frac{I}{I_o}\)

By putting the values, we get

⇒ \(u=\frac{1}{4}(u_o)\)

(c)

⇒ \(\frac{B^2}{B_o^2} =\frac{u}{u_o}\)

         \(=\frac{I}{I_o}\)

⇒ \(B=B_o\times \sqrt{\frac{1}{4} }\)

⇒     \(=\frac{1}{2}(B_o)\)

"Kinetic" energy is the energy of motion.

The ball in the glove is not moving. It's just laying there. (B)

So it has no kinetic energy.

All the other choices describe something moving, so they all have some.

Answer:

W = 641.52 J

Explanation:

The work done here will be the sum of potential energy and the kinetic energy of the boy. Here potential energy accounts for vertical motion part while the kinetic energy accounts for the horizontal motion part:

\(Work\ Done = Kinetic\ Energy + Potential\ Energy\\\\W = K.E +P.E\\\\W = \frac{1}{2}mv^2+mgh\\\\\)

where,

W = Work Done = ?

m = mass = 6 kg

v = speed = 4.2 m/s

g = acceleration dueto gravity = 9.81 m/s²

h = height = 10 m

Therefore,

\(W = \frac{1}{2}(6\ kg)(4.2\ m/s)^2+(6\ kg)(9.81\ m/s^2)(10\ m)\)

W = 52.92 J + 588.6 J

W = 641.52 J

To obtain the type, orientation, location and magnification of the image, we shall first obtain the location (i.e distance) of the image from the mirror. Details below:

The location i.e distance of the image can be obtained as follow:

1/f = 1/v + 1/u

Rearrange

1/v = 1/f - 1/u

v = (f × u) / (u - f)

v = (12 × 24) / (24 - 12)

v = 288 / 12

v = 24 cm

Thus, the the location of the image is 24 cm

Since the location of the image is positive (i.e 24 cm). Thus,

Now, we shall obtain the magnification of the image. Details below:

Magnification = image distance (v) / object distance (u)

Magnification = 24 / 24

Magnification = 1

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The correct free body diagram for the case when the ball is at its lowest point is tension pointing upwards and weight of the object pointing downwards.

The tension in the string at the lowest point in a circular path is equal to weight added to centripetal force required.

Mathematically, the formula for the tension in the string is given as;

T = W + ma

where;

At the lowest point the acceleration of the object is zero, a = 0. The new equation becomes the following;

T = W

The free body diagram of the tension and the weight of the object is given as;

                                ↑ T

                                Ф

                                ↓ W

Thus, the correct free body diagram consist of the tension force pointing upwards and the weight of the object pointing downwards.

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The remote PIC should be aware of the wind gust because of a)  the rapid change in direction and speed which causes turbulence.

The wind gust is a sudden short-term increase in wind speed. According to US weather observation practice, a gust is reported when the maximum wind speed reaches at least 16 knots and the difference between the maximum wind speed and the light wind speed reaches at least 9 knots. Wind forces can disrupt a building's load path or pierce the building's skin. Doors and windows can burst in really high winds. In other cases, nearby debris can be caught in the wind and flung into the building's envelope.

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Answer:

a.  t \(\simeq\) 14.98 sec

b.   x = 501.27 m

Explanation:

From the given information:

\(\dfrac{dv}{dt}=9.8-(\dfrac{v}{5 })\)  and   \(v(0)=0\)

\(\dfrac{dv}{dt}=\dfrac{49-v}{5 }\)

\(\dfrac{dv}{49-v}=\dfrac{dt}{5 }\)

Taking  Integral of  both sides

\(- ln(49-v) = \dfrac{t}{5} + C\)  

at t=0 we have v=0

This implies that

\(- ln(49-0) = \dfrac{0}{5} + C\)

\(C= - ln(49)\)

Thus:

\(\dfrac{t}{5} - In (49) = - In (49 -v) \\ \\ In(49) - \dfrac{t}{5} = In (49-v)\)

\(49-v = e^{(-\frac{t}{5} +ln(49))}\\ \\ v = 49 - 49e^{(-\dfrac{t}{5})}\)

The limiting velocity when the time is infinite is :

95% of 49 = 46.55

∴

\(0.05= e^{(-\dfrac{t}{5})}\)

\(\dfrac{t}{5}= In(\dfrac{1}{0.05})\)

\(\dfrac{t}{5}=2.9957\)

t = 5 × 2.9957

t \(\simeq\) 14.98 sec

b.) \(v = 49 - 49e^{(-\dfrac{t}{5})}\)

\(v = \dfrac{dx}{dt}=49 - 49e^{(-\dfrac{t}{5})}\)

\(dx=(49 - 49e^{(-\frac{t}{5})}) \ dt\)

Taking integral of both sides.

\(x = 49t + 245 e^{(\frac{-t}{5})} +C\)

 at time t = 0 , distance x traveled = 0

∴

C= - 245

Therefore

\(x = 49t + 245 e^{(\frac{-t}{5})} -245\)

replacing the value of t = 14.98

\(x = 49(14.98) + 245 e^{(\frac{-14.98}{5})} -245\)

x = 501.27 m

In a ocean full of storms

A new wave was born

Deep into that darkness flooding

Suddenly, I heard some pummeling

By the grave I saw the winds

And the sun just shined

Answer:

a friendly face that comes with waves,

the waves of all the memorial days,

and with these days we smile with pride,

as for the waves we used to ride,

given up the day has passed,

how it went away like an hour glass,

as if we knew the world was right,

just like the waves, oh so bright,

the time has come the days have passed,

the waves ashore the waves alast,

as if the friendly face was right,

the waves that rode, oh goodnight.

Answer: A

Explanation: We know that f=p*n

f=50*300=15000 Hz = 15kHz.

Have a great day! <3

If the number of revolutions is 300 and the paired poles are 50 , then the frequency would be 15 kHz, therefore the correct answer is option A.

It can be defined as the number of cycles completed per second. It is represented in hertz and inversely proportional to the wavelength.

The frequency of a pendulum is the reciprocal of the time period can be given by the following relation,

F = 1 / T

As given in the problem, we have to calculate frequency if the number of revolutions is 300 and the paired poles are 50.

F = 300 × 50

  = 1500 kHz

Thus, If the number of revolutions is 300 and the paired poles are 50, then the frequency would be 15 kHz, therefore the correct answer is option A.

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c. Sodium and potassium

Perspiration, water given off by the intact skin, either as vapor by simple evaporation from the epidermis or as sweat, a form of cooling in which liquid actively secreted from sweat glands evaporates from the body surface.

When our body is sweating sodium and potassium is lost from the body along with water.

In order to maintain the integrity of the cells in the body ,Sodium and potassium are very important.

Sweat is also known as perspiration.

So,

By maintaining  the proper cell functioning and cell vitality optimum level of sodium and potassium should be maintained in the body.

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Answer:

the answer is 100sin45°

Explanation:

F=100N

0=45°

component to the horizontal so we say 90°-45°=45°

magnitude of component =100sin45°

Answer:

because

Explanation:

starts with question then explored through the mind.

Answer:

object would move but it could be difficult to slow down or stop.

1. The force between the two charges is 1.78 × 10⁻⁵ pounds, with opposite signs indicating attraction between the charges.

2. The resistance of 10 gauge aluminum wire over a 40 ft distance would be 0.506 ohms.

3. The cost of electricity from the automobile battery is 38.6 cents per kWh.

4. The current that would be carried through the body is 0.8 mA if dry.

1. The force between two point charges can be calculated using Coulomb's law, which states that the force is proportional to the product of the charges and inversely proportional to the square of the distance between them.

Using the values given, the force can be calculated as F = (k * q1 * q2) / r², where k is Coulomb's constant, q1 and q2 are the charges, and r is the distance between them. Plugging in the values, the force can be calculated as 1.78 × 10⁻⁵ pounds, with opposite signs indicating attraction between the charges.

2. The resistance of a wire is determined by its length, cross-sectional area, and resistivity. The resistivity of aluminum is higher than that of copper, so a larger cross-sectional area is required to achieve the same resistance. Using the gauge size conversion chart, 10 gauge aluminum wire has a cross-sectional area of 5.26 mm², which is approximately 83% of the cross-sectional area of 12 gauge copper wire.

Thus, the resistance of 10 gauge aluminum wire over a 40 ft distance can be calculated as R = (rho * L) / A, where rho is the resistivity of aluminum, L is the length, and A is the cross-sectional area. Plugging in the values, the resistance can be calculated as 0.506 ohms.

3. To calculate the cost of electricity per kWh, the total cost and the total amount of energy supplied must be known. Since the battery supplies 12 V and 51 A for one hour, the total energy supplied can be calculated as E = V * I * t, where V is the voltage, I is the current, and t is the time.

Plugging in the values, the total energy supplied can be calculated as 612 watt-hours (Wh). Since one kWh is equal to 1000 Wh, the total energy supplied can be converted to 0.612 kWh. Dividing the total cost by the total energy supplied gives the cost per kWh, which is 38.6 cents.

4. The current through the body can be calculated using Ohm's law, which states that current is equal to voltage divided by resistance. Using the values given, the resistance can be either 100,000 ohms or 300 ohms depending on whether the skin is dry or wet.

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The magnetic field in the region is into the paper and has a magnitude of 60 mT and the tension in either wire is 0.096 N.

To find the tension in either wire, we can apply the equation for the force experienced by a current-carrying wire in a magnetic field.

The force experienced by a current-carrying wire in a magnetic field is given by the equation F = B * I * L * sin(θ), where B is the magnetic field strength, I is the current, L is the length of the wire, and θ is the angle between the wire and the magnetic field.

In this case, the wire is suspended horizontally by two vertical wires, and the magnetic field is into the paper. Since the wire is horizontal, the angle between the wire and the magnetic field is 90 degrees, so sin(θ) = 1.

The force experienced by the wire due to the magnetic field is F = B * I * L.

Given:

Current (I) = 8.0 A

Magnetic field (B) = 60 mT = 60 * 10^(-3) T

Length of the wire (L) = 40 cm = 40 * 10^(-2) m

Substituting the given values into the equation, we get:

F = (60 * 10^(-3) T) * (8.0 A) * (40 * 10^(-2) m)

Simplifying the expression, we find:

F = 0.192 N

Since the wire is suspended by two vertical wires, the tension in each wire will be half of the total force. Therefore, the tension in either wire is 0.192 N / 2 = 0.096 N.

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Answer:

4th of August is the

Explanation:

5th and then I can help out by getting

Answer:

7.46×10⁻⁶ m

Explanation:

Applying,

F = kqq'/r²............ Equation 1

make r the subject of the equation

r = √(F/kqq').......... Equation 2

From the question,

Given: F = 8 N, q' = q= 4 C

Constant: k = 8.98×10⁹ Nm²/C²

Substitute these values into equation 2

r = √[8/(4×4×8.98×10⁹)]

r = √(55.7×10⁻¹²)

r = 7.46×10⁻⁶ m

Answer:The correct statement about electric charges is:

"An object with a negative charge and an object with a positive charge will attract each other."

Explanation:

*an object with a negative charge and an object with a positive charge will attract each other" this statement is true.

Electric charge is the physical property of matter that experiences force when it is placed in electric field. F = qE where q is amount of charge, E = electric field and F = is force experienced by the charge. there are two types of charges, positive charge and negative charge which are generally carried by proton and electron resp. like charges repel each other and unlike charges attract each other. the flow charges is called as current. Elementary charge is amount of charge a electron is having, whose value is 1.602 x 10⁻¹⁹ C.

Hence option B is correct.

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