If a point charge is located at the center of a cylinder and the electric flux leaving one end of the cylinder is 20% of the total flux leaving the cylinder, what portion of the flux leaves the curved surface of the cylinder

Answer:

Average acceleration of the car is 1.167 m/s^2

Explanation:

The speed of car with which it is travelling is 12 m/s

As the driver accelerates the car, the speed reaches 26 m/s

The change in speed in 12 seconds is

26 -12 = 14 m/s

Average acceleration is change in speed divided by time

\(\frac{14}{12} \\1.167\) m/s^2

In this given circuit, there are two resistors, R2 and R3 connected in series with a battery of 12 V as shown below;\(\Delta V = V = 12 V\)Let us first find the total resistance of the circuit.

Using the formula, resistances in series add up to give the total resistance of the circuit\(R_T = R_2 + R_3 = 8\ \Omega + 12\ \Omega = 20\ \Omega\)

Using Ohm's Law; the current through the circuit can be calculated as follows;

\(I_T = \frac{V}{R_T} = \frac{12\ V}{20\ \Omega} = 0.6\ A\)

Thus, the current through each of the resistors, R2 and R3 is the same and it is equal to the total current of the circuit;\(I_1 = I_2 = 0.6\ A\)

The potential difference across each of the two resistors, R2 and R3 is different because of the difference in resistance. Using Ohm's Law, the potential difference across each resistor can be calculated as follows;

\(\Delta V_2 = V_{R_2} = I_2 \cdot R_2 = 0.6\ A \cdot 8\ \Omega = 4.8\ V\)

\(\Delta V_3 = V_{R_3} = I_2 \cdot R_3 = 0.6\ A \cdot 12\ \Omega = 7.2\ V\)

Thus, the potential difference across resistor R2 is 4.8 V and across resistor R3 is 7.2 V.

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It will take 4.30 seconds to accelerate the sphere from 1.5 rad/s to 8.5 rad/s.

Moment of inertia, a quantitative measure of the rotational inertia of a body in physics - The resistance that a body exhibits to changing its rotational speed about its axis by the application of a torque (torque). Axis can be internal or external and can be fixed or unfixed.

For the calculation of torque:

τ = F × r × sinθ

τ = Torque

F = force applied (52 N)

r = radius (0.4 m)

θ = angle between force and radius (90°)

τ = 52 × 0.4 × sin90

τ = 52 × 0.4 × 1

τ = 20.8 Nm

Now, for angular acceleration:

τ = α × I

α = τ/I

α = Angular acceleration

τ = Torque (20.8 Nm)

I = moment of inertia (12.8 kg-m²)

α = 20.8/12.8

α = 1.625 rad/s²

Time required by the sphere to accelerate:

α = (ω₂ -ω₁)/t

t = (ω₂ -ω₁)/α

t = (8.5 - 1.5)/1.625

t = 4.30 s

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Any item that is at rest has zero momentum. At rest, there is no “mass in motion” or momentum for the object. For the purpose of comparing the momentum of two objects, mass and velocity are both significant factors. Thus, option A is correct.

A force accelerates an object if it acts in the same direction as the object's motion. A force will alter an object's velocity either way. Additionally, if an object's velocity changes, its momentum will as well.

Therefore, In a collision, an object encounters a force for a predetermined period of time, changing the velocity of its mass (i.e., that results in a momentum change). The impulse-momentum change theorem refers to this.

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Answer:

5000 N

Explanation:

F=ma

=1000*5

=5000N

Here's the solution,

now, we know

\( \large \boxed{f = m \times a}\)

so,

The force required is 5000 Newtons.

The middle ear is the part of ear that needs equalisation when changing altitude or scuba diving.

The water pressure you are diving through will affect the pressure in your outer ear. The Tympanic Membrane, also known as the "Eardrum," is located between the outer and middle ears. If there is an imbalance in the pressure between the two ears, the Tympanic Membrane will flex, resulting in discomfort or suffering.

The Eustachian Tubes, which are used to blow air into the middle ear, work to counteract this. Since the Eardrum is the only flexible portion of the middle ear, breathing more air into the middle ear will create pressure inside the middle ear, which will then cause the Eardrum to bend back to its original position. As a result, equalisation.

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Answer:

I. 0 m/s

II. 20 m/s

III. Part BC

Explanation:

I. Determination of the initial velocity.

From the diagram given above,

The motion of the car starts from the origin. This implies that the car start from rest and as such, the initial velocity of the car is 0 m/s

II. Determination of the maximum velocity attained.

From the diagram given above, we can see clearly that the maximum velocity is 20 m/s.

III. Determination of the part of the graph that represents zero acceleration.

It important that we know the meaning of zero acceleration.

Zero acceleration simply means the car is not accelerating. This can only be true when the car is moving with a constant velocity.

From the graph given above, the car has a constant velocity between B and C.

Therefore, part BC illustrates zero acceleration.

The two energy sources that are used in homes the most are electricity and natural gas. Natural gas is a non-renewable energy source, whereas electricity that is generated from unconventional sources is.

Sunlight, water, wind, and geothermal sources like hot springs and fumaroles are examples of renewable resources. Petroleum and coal are examples of fossil fuels that are non-renewable resources. The majority of renewable resources have small carbon footprints and low carbon emissions.

A well-built and securely sealed thermal envelope, controlled ventilation, appropriately sized, high-efficiency heating and cooling systems, and energy-efficient doors, windows, and appliances are the essential components of the majority of energy-efficient homes, despite construction costs, options, and styles being different.

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Answer:

Time = 13333.33 s = 222.22 min = 3.7 h

Explanation:

The total amount of energy in two cells combined will be:

\(Total\ Energy = 40000\ J + 40000\ J\\Total\ Energy = 80000\ J\\\)

Now, we calculate the power of the batteries:

\(Power = (Voltage)(Current)\\Power = (3\ V)(2\ A)\\Power = 6\ Watt\)

Now, we use the following formula to calculate the time  the batteries will be able to deliver the power to the flashlight:

\(Total\ Energy = (Power)(Time)\\\\Time = \frac{Total\ Energy}{Power}\\\\Time = \frac{80000\ J}{6\ Watt}\)

Time = 13333.33 s = 222.22 min = 3.7 h

Angular speed = 0.4 rad/s , when a 5.0-m radius playground merry-go-round with a moment of inertia of 2000 kg m2 is rotating freely with an angular speed of 1.0 rad/s.

radius = 5 m

moment of inertia = 2000 kg-m²

angular speed = 1.0 rad/s

mass = 60 kg

to find out

angular speed

solution

Rotational momentum of merry-go-round = I?

The momentum we experience here is expressed as

momentum = 2000 × 1

momentum = 2000 kg-m²/s

and  

Inertia of people will be here as

Inertia of people = mr² = 60 × 5²

Inertia of people = 1500 kg-m²

so Inertia of people for two people  

1500 × 2 = 3000

and

Currently, angular momentum conservation

(Momentum + People's Inertia) = Moment of Inertia Angular Speed angular velocity

2000 ×  1 = (2000 + 3000 ) ω

solve we get now  

ω = 0.4 rad/s

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Answer:

The real answer is C : organize the data in a chart or a table.

The age limit to drink beer is 17 or 18 and up

Answer:

Population 1 indicates growth while Population 2 indicates a declining population

Explanation:

Here, using the given rate of change of the population, we want to determine which of the two is growing and which is declining

From the rate of change of both, we can determine this. Looking at the differential equation for the first one, we can see that it is of positive value. Looking at the differential equation for the second one. we can see it is of negative value

While a positive change rate indicates growth, a negative change rate will indicate otherwise

Hence, we can conclude that the one with a negative rate change will indicate a declining population

Answer:

Derived quantities are quantities that are calculated from two or more measurements. Derived quantities cannot be measured directly. They can only be computed. Many derived quantities are calculated in physical science. Three examples are area, volume, and density.

Answer:

What is derive quantities​?

Derived quantities are those that may be expressed in terms of base or derived quantities by means of the mathematical symbols of multiplication and division only (no addition or subtraction or any other sign). ... The first group consists of derived quantities, which have proper units. Derived quantities are expressed as algebraic combinations of base quantities.

Examples of the Derive quantities

Derive Quantity and their units

When the Bowen ratio is low and negative, it means the surface is wet, and the latent heat flux is significant, while the sensible heat flux is minor. Because of Arctic sea ice's nature, the Bowen ratio is expected to be small and negative.

During summer, the Arctic sea ice's surface temperatures are often above 0° C, with a temperature inversion expanding from the surface to altitudes of some hundred meters.

For such conditions, the sensible heat flux H is expected to be positive, while the latent heat flux H L is expected to be small or zero. The Bowen ratio B is expected to be small and negative.

Let us discuss each term in more detail. Sensible heat flux (H):The rate of heat transfer from the Earth's surface to the atmosphere due to the temperature difference is referred to as the sensible heat flux. The earth surface warms up due to solar radiation, and then the warm surface transfers heat to the cooler air. The air then heats up and rises, creating convection currents that aid in the heat transfer process.

Sensible heat flux is positive when heat moves from the surface to the atmosphere.Latent heat flux (H L ):The heat required for a phase transition, such as a liquid converting to a gas, is referred to as latent heat. The energy required to convert a material from one phase to another is referred to as latent heat. Evaporation and transpiration are the two main processes that contribute to the latent heat flux.

Because Arctic sea ice's surface temperature is typically above the melting point of ice during summer, the latent heat flux is expected to be small or zero.

Bowen ratio (B):The Bowen ratio is a measure of the ratio of sensible heat flux to latent heat flux. It's a dimensionless quantity that helps to understand the surface's evapotranspiration efficiency.

When the Bowen ratio is low and negative, it means the surface is wet, and the latent heat flux is significant, while the sensible heat flux is minor. Because of Arctic sea ice's nature, the Bowen ratio is expected to be small and negative.

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1. Sensible heat flux (H) is negative, indicating heat transfer from the surface to the atmosphere.
2. Latent heat flux (H_L) is positive, indicating heat transfer from the atmosphere to the surface through evaporation.
3. Bowen ratio (B) is negative, indicating that the sensible heat flux is larger than the latent heat flux. The magnitude of the Bowen ratio can vary depending on the specific conditions.

In summer, surface temperatures over Arctic sea ice are often above 0°C, and there is a temperature inversion that extends from the surface to altitudes of a few hundred meters.

1. Sensible heat flux (H): The sensible heat flux is the transfer of heat between the surface and the atmosphere due to temperature differences. In this case, the sensible heat flux is expected to be negative. This means that heat is being transferred from the surface (warmer) to the atmosphere (cooler). The magnitude of the sensible heat flux can vary depending on the temperature difference between the surface and the atmosphere, but it is generally larger when the temperature difference is greater.

2. Latent heat flux (H_L): The latent heat flux is the transfer of heat between the surface and the atmosphere due to the evaporation and condensation of water. In this case, the latent heat flux is expected to be positive. This means that heat is being transferred from the atmosphere (warmer) to the surface (cooler) through the process of evaporation. The magnitude of the latent heat flux depends on factors such as the availability of moisture and the temperature difference between the surface and the atmosphere. It can be larger when there is more moisture available for evaporation and when the temperature difference is greater.

3. Bowen ratio (B): The Bowen ratio is the ratio of sensible heat flux to latent heat flux. It provides information about the relative importance of sensible and latent heat transfer processes. In this case, the Bowen ratio is expected to be negative. This indicates that the sensible heat flux is larger than the latent heat flux. The magnitude of the Bowen ratio can vary depending on the specific conditions, but it is generally larger when the sensible heat flux is dominant.

To summarize:
- Sensible heat flux (H) is negative, indicating heat transfer from the surface to the atmosphere.
- Latent heat flux (H_L) is positive, indicating heat transfer from the atmosphere to the surface through evaporation.
- Bowen ratio (B) is negative, indicating that the sensible heat flux is larger than the latent heat flux. The magnitude of the Bowen ratio can vary depending on the specific conditions.

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Answer:

Explanation:

Answer:

Here, the acceleration of shingles is a=g=9.8m/s2, Initial velocity of it is u=0m/s and distance traveled S=8.52mLet t be the required time for the shingles to reach ground. Using formula S=ut+at2/2we get,  8.52=0(t)+0.5(9.8)t2⟹ t=1.32s

Answer:

The west component of the given vector is - 42.548 meters.

Explanation:

We need to translate the sentence into a vectoral expression in rectangular form, which is defined as:

\((x, y) = (r_{x}, r_{y})\)

Where:

\(r_{x}\) - Horizontal component of vector distance, measured in meters.

\(r_{y}\) - Vertical component of vector distance, measured in meters.

Let suppose that east and north have positive signs, then we get the following expression:

\((x, y) = (-45\cdot \cos 19^{\circ}, -45\cdot \sin 19^{\circ})\,[m]\)

\((x, y) = (-42.548,-14.651)\,[m]\)

The west component corresponds to the first component of the ordered pair. That is to say:

\(x = -42.548\,m\)

The west component of the given vector is - 42.548 meters.

The efficiency of a certain engine can be determined using the Carnot Cycle equation. The efficiency of an engine is proportional to the difference in temperature between the hot reservoir and the cold reservoir.

The efficiency can be calculated using the following formula:

η = (Th - Tc) / ThWhere,η = efficiency of the engine

Th = temperature of the hot reservoir

Tc = temperature of the cold reservoir

Given that the temperature of the hot reservoir is 700°C and the temperature of the cold reservoir is 230°C.

Therefore,η = (700 - 230) / 700η = 0.67The efficiency of the engine is 0.67 or 67%. In other words, only 67% of the heat energy is converted into mechanical energy while the remaining 33% is lost as waste heat.

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Answer:C

Explanation:

Therefore, it is not true that the equation for molar enthalpies of mixtures in a binary liquid solution can be represented in the form of Eq. (11.11).

The given equation for molar enthalpies of mixtures in a binary liquid solution is:

ΔHmix = x₁x₂(α₁α₂)[(1 - k)x₁ + kx2]²

where x₁ and x₂ are the mole fractions of the two components A and B, respectively, and α₁, α₂, and k are constants.

To determine whether this equation can be represented in the form of Eq. (11.11), which is ΔHmix = ΔH°mix + xi(xjA + xkB), where ΔH°mix is the molar enthalpy of mixing at infinite dilution and xjA and xkB are the mole fraction-based enthalpy deviations for pure components A and B, respectively, we need to compare the two equations.

Expanding the given equation, we get:

ΔHmix = x₁x₂(α₁α₂)[(1 - k)²x1² + 2k(1 - k)x1x2 + k²x2²]

Comparing this with the equation ΔHmix = ΔH°mix + xi(xjA + xkB), we can see that:

ΔH°mix = 0 (since there is no constant term in the given equation)

x₁x₂(α₁α₂) = xixjA (since x1² = x1 and x2² = x2 for mole fractions)

x₁x₂(α₁α₂) = xixkB (using the same logic as above)

Substituting these values in the equation ΔHmix = ΔH°mix + xi(xjA + xkB), we get:

ΔHmix = x₁x₂(α₁α₂)(xjA + xkB)

which is not equal to the given equation. Therefore, it is not true that the equation for molar enthalpies of mixtures in a binary liquid solution can be represented in the form of Eq. (11.11).

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Answer:material 3

Explanation:

a. The time taken to reach maximum height is 2.16 s.

b. The total time taken to return to its original level is 4.32 s.

c. The maximum height reached is 22.9 m.

d.  The horizontal distance travelled is 91.6 m.

Given information:

Velocity of ball = 30 ms⁻¹

Angle = 45° = π/4 rad

Gravity = 9.8 ms⁻²

To find:

a. The time taken to reach maximum height

b. The total time taken to return to its original level

c. The maximum height reached

d. The horizontal distance travelled.

a) The time taken to reach maximum height:

The time taken to reach maximum height can be calculated by using the formula as follows:

Time taken, t = (u sin θ) / g

Where,

u = Velocity of ball = 30 ms⁻¹

θ = Angle = 45° = π/4 rad

g = Acceleration due to gravity = 9.8 ms⁻²

Substitute the given values in the above formula:

t = (30 sin (π/4)) / 9.8

t = 2.16 s

b) The total time taken to return to its original level:

The time taken to reach the maximum height is equal to the time taken to return to its original level. Hence,

Total time taken = 2 x time taken to reach maximum height

Total time taken = 2 x 2.16

Total time taken = 4.32 s

c) The maximum height reached:

The maximum height reached can be calculated by using the formula as follows:

H = (u² sin² θ) / 2g

Where,

u = Velocity of ball = 30 ms⁻¹

θ = Angle = 45° = π/4 rad

g = Acceleration due to gravity = 9.8 ms⁻²

Substitute the given values in the above formula:

H = (30² sin² (π/4)) / (2 x 9.8)

H = 22.9 m

d) The horizontal distance travelled:

The horizontal distance travelled can be calculated by using the formula as follows:

D = u cos θ x t

Where,

u = Velocity of ball = 30 ms⁻¹

θ = Angle = 45° = π/4 rad

t = Total time taken = 4.32 s

Substitute the given values in the above formula:

D = 30 cos (π/4) x 4.32

D = 91.6 m

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The distance is 5m.

The reaction distance can be calculated as follows:

reaction distance = initial velocity * reaction time = 20 m/s * 0.50 s = 10 m

The braking distance can be calculated using the equation for motion under constant deceleration:

braking distance = (initial velocity^2) / (2 * deceleration) = (20 m/s)^2 / (2 * 10 m/s^2) = 20 m

Therefore, the total stopping distance is 10 m + 20 m = 30 m. So, there will be a distance of 35 m - 30 m = 5 m between you and the deer when you come to a stop.

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Hi there!

If they are in opposite direction:

- Let UP be the POSITIVE direction and DOWN be the NEGATIVE direction.

Thus:

∑F = 114.6 - 70.7 = 43.9 N upward

If they are in the SAME, downward direction:

∑F = -114.6 - 70.7 = -185.3

The magnitude is the absolute value, so:

|-185.3| = 185.3 N downward

The radius of the orbit of the satellite is four times the radius of Earth.

The gravitational force experienced by an object in circular orbit is given by the formula:

F = GMm/r^2

where;

We are given that the magnitude of the gravitational force on the satellite in orbit is F/16, compared to the gravitational force F experienced by the satellite at rest on the surface of the Earth. Therefore,

F/16 = GMm/r^2

Dividing both sides of the equation by F, we get:

1/16 = (GMm/r^2)/F

Using the fact that GM/R^2 = g,

we can rewrite the equation as:

1/16 = (gR^2/r^2)

Multiplying both sides of the equation by r^2, we get:

r^2/16 = gR^2

Multiplying both sides of the equation by 16, we get:

r^2 = 16gR^2

Taking the square root of both sides, we get:

r = 4R

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Answer:

B

Explanation:

As the 10kg object gains more energy as it falls closer and closer to the ground.

When Jenny pushes off the ground with her feet, she applies a force to the seesaw. This force causes her side of the seesaw to rise and the opposite side, where Malcolm is sitting, to fall. The correct option is D. Malcolm's side of the seesaw is raised in the air.

As a result, Malcolm's side of the seesaw is raised in the air. This is because the seesaw is a type of lever, and when force is applied to one side of the lever, the opposite side moves in the opposite direction.

So, when Jenny pushes off the ground with her feet, the force she applies causes Malcolm's side of the seesaw to rise.

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Answer:

The heavier the more momentum

Explanation:

the truck i heavier so there for it has more momentum

Answer:

A. Commutator

Explanation:

Commutator is part of a motor causes its electromagnet to turn in the same direction consistently, transforming electrical energy into mechanical energy.

Energy is the ability or capability to do tasks, such as the ability to move an item (of a certain mass) by exerting force. Energy can exist in many different forms, including electrical, mechanical, chemical, thermal, or nuclear, and it can change its form.

A commutator is a rotary electrical switch in certain types of electric motors and electrical generators.

Commutator is part of a motor causes its electromagnet to turn in the same direction consistently, transforming electrical energy into mechanical energy.

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