A child is sending pulses down a stretched rope at a rate of 2 pulses per second. The distance between the pulses is 5 meters. What is the speed of the wave?.

Microevolution refers to the evolution occurring at species-level involves three mechanisms that cause allelic frequencies to change in a population: gene flow, genetic drift, and natural selection.

Changes in the environment can affect population gene pools on both a small- and large-scale. Microevolution is the process of population-level changes in allele frequency. Some alterations take place at the species level or lower. There are hence variations in allele frequencies between or within groups.

Natural selection is one of the mechanisms of microevolution. It serves as an editor for allele frequency in populations to determine whether individuals with particular features have a higher or lower chance of surviving and procreating. Populations' gene pools can occasionally shift as a result of individuals leaving or entering the community. This transfer of alleles between populations is referred to as gene flow. Genes can "flow" from one area to another just like water does in a river.

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In the physical activity pyramid, sedentary activities belong to Level D.

The Physical Activity Pyramid is a graphic representation of the different types of physical activities that are recommended for a healthy lifestyle.

The pyramid is divided into four levels, with the most important activities at the bottom and the least important at the top. The greatest and most significant activities for healthy everyday life are at the bottom and the least healthy activities at the top, which you should only perform occasionally.

Sedentary activities, which are activities that involve little or no physical movement, belong at the top of the pyramid, in Level D.

Level D is the smallest section of the pyramid, and it represents activities that should be limited in order to maintain good health.

Hence, option D is the correct choice.

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Drag the phase slider left and right to move the planet into and out of transit mode. The normalized flux (the relative amount of starlight reaching an observer on Earth) when the planet is off the side (not transiting) is 0.990 while the normalized flux when the planet is transiting is 1.000. Thus, the correct option for this question is B.

Normalized flux may be characterized as a type of key methodology in spectral data mining. It is important for the efficiency and accuracy of the automatic processing of massive astronomical spectral data, information extraction, and sharing.

A transit occurs when a planet passes between a star and its observer. Transits within our solar system can be observed from Earth when Venus or Mercury travel. The frequency of the normalized flux when the planet is transiting is completely different from when the planet is off the side.

Therefore, the correct option for this question is B.

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Answer: 1.000,0.990 (correct)

Explanation:

a. The time it takes the ice to reach melting point is: t = 4180 J / 2000 J/s = 2.09 s

b. The time it takes to fully melt is: t = 33300 J / 2000 J/s = 16.65 s

c. The time it takes to reach boiling point after melting is: t = 418000 J / 2000 J/s = 209 s.

a. To find the time it takes for the ice to reach its melting point (0°C), we need to calculate the amount of heat required to raise the temperature of the ice block from -10°C to 0°C. The heat required can be calculated using the equation:

Q = m * C * ΔT

where m is the mass of the ice block (100 g)

C is the specific heat capacity of water (4.18 J/g°C)

and ΔT is the change in temperature (0°C - (-10°C) = 10°C).

So, Q = 100 g * 4.18 J/g°C * 10°C = 4180 J

Now, we can use the heat supplied by the stove to calculate the time it takes to raise the temperature of the ice block to 0°C:

t = Q / P

where P is the power supplied by the stove (2000 J/s).

So, t = 4180 J / 2000 J/s = 2.09 s

b. To find the time it takes for the ice to completely melt, we need to calculate the amount of heat required to turn the ice block into liquid water. The heat required can be calculated using the equation:

Q = m * Lf

where m is the mass of the ice block (100 g) and Lf is the latent heat of fusion of water (333 J/g).

So, Q = 100 g * 333 J/g = 33300 J

Now, we can use the heat supplied by the stove to calculate the time it takes to melt the ice block:

t = Q / P

where P is the power supplied by the stove (2000 J/s).

So, t = 33300 J / 2000 J/s = 16.65 s

c. To find the time it takes for the water to reach the boiling point (100°C), we need to calculate the amount of heat required to raise the temperature of the water from 0°C to 100°C. The heat required can be calculated using the equation:

Q = m * C * ΔT

where m is the mass of the water (100 g), C is the specific heat capacity of water (4.18 J/g°C), and ΔT is the change in temperature (100°C - 0°C = 100°C).

So, Q = 100 g * 4.18 J/g°C * 100°C = 418000 J

Now, we can use the heat supplied by the stove to calculate the time it takes to raise the temperature of the water to 100°C:

t = Q / P

where P is the power supplied by the stove (2000 J/s).

So, t = 418000 J / 2000 J/s = 209 s.

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The man has at most 3.55 s to get out of the way.

Kinematics can be defined as a subfield of physics developed in classical mechanics that describes the motion of points, bodies and systems of bodies without considering the forces that cause them to move.

We can solve this problem using kinematic equations.

First, we can find the time it takes for the block to fall from a height of 84.9 m using the formula:

y = 1/2 * g * t^2

where

Rearranging this equation, we get:

t = sqrt(2y/g) = sqrt(2 * 84.9 m / 9.81 m/s^2) = 4.09 s (to two significant figures)

So the block will hit the ground after 4.09 s of falling.

Next, we can find the time it takes for the block to fall from a height of 16.6 m using the same formula:

t = sqrt(2y/g) = sqrt(2 * 16.6 m / 9.81 m/s^2) = 1.41 s (to two significant figures)

So the block will take 1.41 s to fall from a height of 16.6 m to the ground.

The man has to get out of the way before the block falls the remaining distance of (84.9 - 16.6) = 68.3 m. We can find the time it takes for the block to fall this distance using the same formula:

t = sqrt(2y/g) = sqrt(2 * 68.3 m / 9.81 m/s^2) = 3.55 s (to two significant figures)

Therefore, the man has at most 3.55 s to get out of the way.

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The distance between the two charges is approximately 0.0134 meters.

The Coulomb force between two point charges is given by Coulomb's Law,

[tex]F = \dfrac{k Q_1 Q_2}{r^2}[/tex]

where k is Coulomb's constant, Q1 and Q2 are the magnitudes of the two charges, and r is the distance between them.

Q1 = +8 x 10^-6C, Q2 = -5 x 10^-6C, and F = 0.2 N.

k = 9 x 10^9 N m^2/C^2.

Substituting these values into Coulomb's Law,

[tex]0.2 N = \dfrac{9 \times 10^9 \times 8 \times 10^{-6} \times -5 \times 10^{-6}}{ r^2}[/tex]

Multiplying both sides by r^2, we get:

r^2 = (3.6 x 10^-5 N) / 0.2

r^2 = 1.8 x 10^-4 m^2

r ≈ 0.0134 m

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The probability that the selection is made of 2 oatmeal cookies are 1/6.

As per given data in the question:

Oatmeal cookies - 6

Pecan Cookies - 5

Peanut butter cookies - 1

Total cookies in the jar - 12

The probability that the selection is of 2 oatmeal cookies, it is as follows:

P (oatmeal cookies) = 2/12 = 1/6

Probability deals with the likelihood of an event or phenomena occurring and is quantified as a number between 0 and 1 inclusive, where 0 indicates an impossible chance of occurrence and 1 denotes the certain probable outcome of an event.

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The angular velocity in rad/s are 4.7124 rad/s and the period of the motion is 1.333s.

a) Find angular velocity

Given

45 rpm that is rotations per min  converting it in to rad/s

we know that the angular displacement for one rotation is  2pi rad

45 rpm = 45*2pi/60

            = 4.7124 rad/s

So,the angular velocity is W = 4.7124 rad/s

b) We have relation between the angular velocity and time period is  

W = 2pi /T

T = 2pi/W

T = 2pi/4.7124 s

T = 1.333 s

Angular velocity is a physical quantity that describes the rate of change of the angular displacement of an object with respect to time. It is a vector quantity, and its direction is perpendicular to the plane in which the object is rotating. The magnitude of the angular velocity is given by the ratio of the angular displacement of the object to the time taken to complete the displacement. It is measured in radians per second (rad/s).

Angular velocity is an important concept in physics and is used in the study of rotational motion. It is used to calculate the centripetal force required to maintain circular motion and is also used to describe the motion of planets and other celestial bodies. In addition, angular velocity is used in engineering and mechanics to design and analyze rotating machines and devices.

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Refraction would cause the red light to bend at the air/glass boundary.

While the question is unclear, I assume that you are trying to know something about the refraction of the red light across the air/glass boundary. I will tell you something about refraction!

Refraction is a phenomenon of light where it changes direction when it enters a medium with a different refractive index. Refractive index is a measure of how much a medium bends light that passes through it. When light passes from a medium with a lower refractive index to a medium with a higher refractive index, it bends towards the normal (an imaginary line perpendicular to the surface at the point of incidence). On the other hand, when light passes from a medium with a higher refractive index to a medium with a lower refractive index, it bends away from the normal.

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Here, when , the reaction quotient is less than the equilibrium constant, then, the reaction will move to the right. In the first set up, the reaction quotient is less than Keq. Then, the reaction moves to right.

The reaction quotient of a reaction is the ratio of molar concentration of the product to the molar concentration of the reactants.

In the first setup.

Keq = 6.16 x 10⁻³

Q = [0.0064]²/[0.098] = 4.18 × 10⁻⁴

Q<K⇒The reaction moved to the right (products)

Setup 2 :

Q = [0.0304]²/[0.150]

   = 6.16 x 10⁻³

Q=K⇒the system at equilibrium

Setup 3 :

Q =  [0.230]²/[0.420]

   = 0.126

Q>K⇒The reaction moved to the left (reactants)

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Answer: products, equilibrium, reactants

Explanation:

its right on edge 2023

The speeds of the object at the various positions are :

The formula to determine the velocity or speed is given below:

velocity or speed = √(2s * F/m)

where:

The speeds of the object at the various points are given below:

At x = A: force = 9 N; s = 6 m

speed = √(2 * 6 * 9 / 38)

speed = 2.06 m/s

At x = B; Force = 9 N; s = 12 m

speed = √(2 * 12 * 9 / 38)

speed = 2.38 m/s

At x = C; Force = 0 N; s = 18 m

speed = √(2 * 12 * 0 / 38)

speed = 0 m/s

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Answer:

The potential difference across the battery can be calculated using the equation:

Potential difference (V) = Energy supplied (J) / Charge (C)

Energy supplied during each second = 2.3 coulombs * 4.2 J/C = 9.66 J

Therefore, the potential difference across the battery would be:

Potential difference (V) = 9.66 J / 2.3 C = 4.2 V

So the potential difference across the battery is 4.2 volts.

The time is 5s.

In this problem, the observer is driving through town at

vi​ =16 m/s applies the brakes and begin decelerating with }a=−3.2 m/s²

We calculate the time for the vehicle to stop, and the speed after half the stopping time.

We use the velocity-time equation of the vehicle. When the vehicle stops, the velocity is

vf  ⟹ =vi +at

T = Vf−vi

= 0−16 m/s / −3.2 m/s²

= 5.0 s

What is time?

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(a) The particle is instantaneously at rest at time, t = 3/2 seconds.

(b)  The displacement of the particle is 54 meters from the fixed point O at t = 6 seconds.

(c) The total distance travelled by the particle during the first 6 seconds of its motion is 52 meters.

To find the time when the particle is instantaneously at rest, we need to find the time when its velocity is zero. The velocity of the particle can be found by taking the derivative of its displacement with respect to time, which gives us the velocity function, v(t) = d(x)/dt.

Taking the derivative of x = (t — 1)^3 -2t^2 +1 with respect to time t, we get:

v(t) = 3(t - 1)^2 - 4t

To find when the velocity is zero, we set v(t) = 0 and solve for t:

0 = 3(t - 1)^2 - 4t

3(t - 1)^2 = 4t

t = (3(t - 1)^2)/4

t = (3(t - 1)^2)/4

Solving this equation, we find t = 3/2 seconds. So, the particle is instantaneously at rest at t = 3/2 seconds.

To find the displacement of the particle from O when t=6 s, we simply substitute t = 6 into the displacement function:

x = (6 - 1)^3 - 2 * 6^2 + 1

x = 125 - 72 + 1

x = 54 meters

To find the total distance travelled during the first 6 seconds of its motion, we need to find the definite integral of the velocity function over the interval [0, 6].

x(t) = ∫v(t) dt

x(t) = ∫(3(t - 1)^2 - 4t) dt

x(t) = (t - 1)^3 - 2t^2 + C

where C is the constant of integration. We can determine the value of C by using the initial condition that x(0) = 0:

0 = 0 - 2 * 0^2 + C

C = 0

So, x(t) = (t - 1)^3 - 2t^2.

Finally, to find the total distance travelled during the first 6 seconds of its motion, we evaluate the definite integral of x(t) from 0 to 6:

d = x(6) - x(0)

d = [(6 - 1)^3 - 2 * 6^2] - [(0 - 1)^3 - 2 * 0^2]

d = 125 - 72 - 1

d = 52 meters

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D. Multiplying mass by velocity.

The momentum of an object is a measure of its motion and is defined as the product of its mass and velocity. It is a vector quantity, meaning it has both magnitude and direction.

The formula for momentum is given by p = mv, where p is the momentum, m is the mass of the object, and v is its velocity. So, the momentum of an object can be calculated by multiplying its mass by its velocity.

Option A is incorrect because momentum is not simply the product of mass and acceleration. Option B is incorrect because force is not directly related to momentum. Option C is incorrect because dividing mass by velocity does not give momentum, it gives the velocity of the object.

The magnitude of the charges must be 1.67 x 10⁻⁵ C in order for the force exerted by them to be comparable to the weight of a 50 kilogram individual.

The force of attraction between two point charges Q1 and Q2 separated by a distance r is given by Coulomb's law:

[tex]F = k * (Q1 * Q2) / r^2[/tex]

here,

k is Coulomb constant, value is [tex]9.0 * 10^9 Nm^2/C^2[/tex].

To find the magnitude of the charges such that the force between them equals the weight of a 50 kg person, we need to set the force equal to the weight of the person:

F = m * g

here,

m is mass of the person and

g is the acceleration gravity, value [tex]9.81 m/s^2[/tex].

Reserving values:-

[tex]m * g = k * (Q1 * Q2) / r^2[/tex]

We know that Q1 and Q2 are equal, so we can write Q1 = Q2 = Q. Reserving equation above:-

[tex]m * g = k * Q^2 / r^2[/tex]

Solving for Q:-

[tex]Q = \sqrt{[(m * g * r^2) / k]}[/tex]

Reserving values:-

[tex]Q = \sqrt{x} \sqrt{[(50 kg * 9.81 m/s^2 * (1.0 m)^2) / (9.0 x 10^9 Nm^2/C^2)]}[/tex]

Simplifying and evaluating:-

[tex]Q = 1.67 * 10^-^5 C[/tex]

Therefore, the magnitude of each of the charges should be approximately [tex]1.67 * 10^-^5 C[/tex].

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Its vertical acceleration is equal to -g, while the horizontal component of its velocity is unchanged.

This is due to the projectile's dual components of vertical and horizontal velocities. But when the item moves, its vertical component of velocity changes but its horizontal component does not.

The projectile's horizontal component of velocity remains constant, therefore it only has a vertical component of acceleration and no horizontal component. The horizontal component of velocity remains unchanged as a result.

Since the only vertical force acting on the object is the weight, the vertical component of acceleration is equal to -g.

Therefore, the vertical component of its acceleration is equal to -g, while the horizontal component of its velocity remains constant.

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(a) The potential energy of the tank of water with respect to the floor is 294,000 J.

(b) The potential energy of the tank of water with respect to the basement is 392,000 J.

The potential energy of the tank of water with respect to the floor can be calculated as follows:

Potential energy = mgh

where;

We can first find the mass of the water using the density of water, which is approximately 1000 kg/m³:

Mass of water = density x volume

Mass of water = 1000 kg/m³ x 2500 L

Mass of water = 2500 kg

Now we can calculate the potential energy:

Potential energy = 2500 kg x 9.8 m/s² x 12.0 m

Potential energy = 294,000 J

The potential energy of the tank of water with respect to the basement can be calculated in a similar way. We can first calculate the height of the tank with respect to the basement:

Height of tank with respect to basement = 12.0 m + 4.0 m

Height of tank with respect to basement = 16.0 m

Now we can calculate the potential energy using the same formula as before:

Potential energy = 2500 kg x 9.8 m/s² x 16.0 m

Potential energy = 392,000 J

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Answer:

A) Electric flux depends on the charge Q within and enclosed surface regardless of the shape of the surface - this concept is particularly useful for symmetric surfaces (centralized charge within a sphere) - field outside a uniform cylinder - whenever charges are symmetric with respect to the external environment.

B) Since the gravitational field has the same form as the electric field -           F = G M1 M2 / R^2 the same arguments apply to the gravitational field - Field lines passing out thru an enclosed surface are sources of field whereas field lines passing inward thru an enclosed surface are sinks for the field

The correct answers to the blanks are 1. UP ,2. UP and 3. ZERO

When the cart is initially given a push up the ramp, the direction of the acceleration of the cart is up the ramp. This is because the net force acting on the cart is directed up the ramp, in the same direction as the component of the gravitational force that is parallel to the ramp. As a result, the cart accelerates up the ramp in the same direction as the net force.

When the cart turns around and begins moving down the ramp, the direction of the acceleration of the cart is still up the ramp. This is because the component of the gravitational force that is parallel to the ramp is still directed down the ramp, but the net force acting on the cart is directed up the ramp due to the normal force exerted by the ramp on the cart. As a result, the cart accelerates down the ramp in the opposite direction to the net force, which is up the ramp.

            At the highest point that the cart reaches on the ramp, when the cart momentarily comes to rest, the magnitude of the acceleration of the cart is zero. This is because at this point, the cart is at the highest point on the ramp and has stopped moving. As a result, the velocity of the cart is zero, and therefore the acceleration of the cart is also zero.

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The effort required to transport a unit charge from a reference point to a specified place in opposition to an electric field is known as the electric potential.

That implies that it is dependent on the charge. As a result, altering q's value will also alter the electric potential's value. In other words, W/value q's will change.

Electric potential is a scalar quantity that represents the amount of electric potential energy per unit charge at a given point in space. It is also known as voltage and is measured in volts (V). Electric potential is created by the presence of electric charges, which can be either positive or negative. A positive charge creates a region of higher electric potential, while a negative charge creates a region of lower electric potential. The movement of electric charges from high potential to low potential is what generates an electric current. Electric potential is a fundamental concept in electricity and plays a crucial role in the design and operation of electrical circuits, devices, and systems.

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The average speed of the blood is less than 0.95 m/s and the average speed is 0.884 m/s.

What is average speed?

Average speed is a measure of the rate of change in position of an object over a certain period of time. It is calculated by dividing the total distance traveled by the total time taken. In other words, it is the rate at which an object covers a given distance. Average speed is useful in determining the efficiency of a vehicle, or of a person, in covering a particular distance. For example, if a person drives for 2 hours and travels a total distance of 200 kilometers, the average speed of the body is 100 km/hr (200km / 2 hrs).

The average speed is,

[tex]V_{avg} = \frac{d_{1}+ d_{2} }{\frac{d_{1} }{V_{1} }+ \frac{d_{2} }{V_{2} } }[/tex]

        [tex]= \frac{0.50m + 0.50m}{\frac{0.50m}{1.2m/s}+\frac{0.50m}{0.70m/s} }[/tex]

       = 0.884 m/s

Due to the average speed is 0.884 m/s the average speed of the blood becomes less than 0.95 m/s.

Therefore, the average speed of the blood is less than 0.95 m/s and the average speed is 0.884 m/s.

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If a radio station broadcasts at 9.23 x 10⁷Hz and the velocity of the waves is 3  x 10⁸m/s, the wavelength of these waves is 3.25m.

According to the question,

Frequency of the FM radio = 9.23 x 10⁷Hz

Velocity of the waves = 3  x 10⁸m/s

The wavelength of the wave =?

To find the wavelength of the wave, we conclude the velocity equation;

Velocity = frequency x wavelength.

Since to find unknown is the wavelength, we have to solve for it:

       3  x 10⁸  = 9.23 x 10⁷ x wavelength

      wavelength =    3  x 10⁸/ 9.23 x 10⁷

      wavelength = 3.25m

Therefore, the wavelength of these waves is 3.25m.

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Heat will naturally flow from an object at 40°C to an object at 20°C.

Heat is described as the energy that is transferred from one body to another as the result of a difference in temperature.

Heat will naturally flow from an object at a higher temperature to an object at a lower temperature. So in the above scenario,  heat will naturally flow from an object at 40°C to an object at 20°C.

In conclusion, the basic concept of thermodynamics states that heat will flow spontaneously from a higher-temperature body to a lower-temperature body in order to equalize the temperatures of the two bodies.

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Acceleration 1 - constant acceleration. Acceleration 2 - varied acceleration. The correct option is D.

Acceleration of any object is defined as the variation in the speed of the object with the variation of time. Acceleration is a vector term and to define it we require both the magnitude and the direction. The unit of acceleration can be m / sec², miles / sec², etc.

In a velocity-time graph, the acceleration corresponds to the slope of the curve.

In fact, acceleration is defined as the ratio between the change in velocity and the time interval:

a = Δv / Δt

However, in a velocity-time graph, corresponds to the y-variable increment (), while corresponds to the x-variable increment (). (). As a result, acceleration can also be expressed as,

a = Δy / Δx

For object 1, the slope is constant: this means that the acceleration is constant.

For object 2, the slope varies: this means that the acceleration varies as well.

The missing graph is attached with the answer below.

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Answer: B is right

Explanation:  Change in Momentum / Time Therefore, the force experienced by the ball is: Force = 1.52 kg·m/s / 0.0105 s Force = 144.76 N Answer: B. 144.76 N

The coefficient of kinetic friction is approximately 0.533.

To find the coefficient of kinetic friction, we can use the equation of the force of friction, which is given by:

f_friction = friction_coefficient  x f_norm

where;

Since the piano is being pulled at a constant speed, the net force on the piano must be zero, which means that the sum of the forces must be equal to zero:

f_net = f_horizontal - f_friction = 0

friction_coefficient = f_friction / f_norm

= (f_horizontal) / (f_norm)

= (1600 N) / (3000 N) = 0.533

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Answer:

Explanation:   In a series circuit, the output current of the first resistor flows into the input of the second resistor; therefore, the current is the same in each resistor. In a parallel circuit, all of the resistor leads on one side of the resistors are connected together and all the leads on the other side are connected together.

Answer:

bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb

Explanation:

1) Statements best describes the electric field in the region between the spheres  field points radially outward.

2) Statements best describes the electric field in the region outside the red sphere The field is zero.

For positive charge, E field lines are projecting outward of positive charge.

For negative charge, E field lines are projecting inward of negative charge.

Then, between the spheres,

because of q, E field lines are projecting outward of q and inward of- q;

and because of- q, E filed lines are projecting outward of q and inward of- q

So, The field points radially outward

2) C still, net charge inside the gaussian face is zero, If we draw a gaussian face outside the spheres.

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