what is the electric potential at points a , b , and c in (figure 1)? suppose that q = 2.0 nc , r1 = 1.2 cm , and r2 = 1.7 cm .

Answer:

A) in the middle of the atom

Explanation:

He concluded that all of the positive charge and the majority of the mass of the atom must be concentrated in a very small space in the atom's interior, which he called the nucleus.

The net change in thermal energy of the air in the cylinder is -8.8 J.

When a force is exerted on a system and it undergoes a displacement, work is done. In this case, when the pump handle moves 0.24 m, the work done on the air in the cylinder is:

Work = Force x Distance

Work = 45N x 0.24m

Work = 10.8 J

The heat leaving the cylinder through the walls is considered as heat transfer or heat loss to the surroundings.

Therefore, the net change in thermal energy of the air in the cylinder can be calculated using the first law of thermodynamics, which states that the change in internal energy of a system is equal to the heat added to the system minus the work done by the system:

ΔU = Q - W

where ΔU is the change in internal energy of the system, Q is the heat added to the system, and W is the work done by the system.

Substituting the values given in the problem:

ΔU = 2.0 J - 10.8 J

ΔU = -8.8 J

Since the value of ΔU is negative, it means that the internal energy of the air in the cylinder has decreased, which can be attributed to the heat loss to the surroundings.

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The gauge pressure would be 2.234 ×10⁴  Pa   if the pipe is changed for another twice the area.

The total applied force per unit of area is known as the pressure.

The pressure depends both on externally applied force as well the area on which it is applied.

As given in the problem at some point in an underground horizontal pipe, the speed of water is 2.5m/s and the gauge pressure is 2×10⁴ Pa.

By using the continuity equation

A ₁V₁ = A₂V₂

As the area is increased to twice the original area

A ₁V₁ = 2A₁V₂

V₂ =V₁/2

    =2.5 /2

    =1.25 m/s

By using Bernoulli's equation

P₁ + 1/2 ρV₁² = P₂ + 1/2 ρV₂²

P₂ =  2×10⁴ + 1/2 ×1000×(2.5² -1.25²)

    = 2×10⁴ + 2343.75

    =22343.75 Pa

    =2.234 ×10⁴ Pa

Thus, if the pipe is changed for another twice the area then the gauge pressure woul be 2.234 ×10⁴ Pa.

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Answer:

Protists are called plant-like, fungus-like and animal-like because they share some of the characteristics of plants, fungi and animals, even though they belong in a different category: the kingdom Protista.

Explanation:

13.02 meters

Explanation

the work done by the brakes makes the car stops, so the change in energy equals the work done

hence

also, the work done by a force is given by

then, let

replace

therefore, the answer is

13.02 meters

I hope this helps you

Answer:

The Tesla moves approx. 25 meters from rest before reaching 60 mi/hr

Explanation:

Given:

Initial velocity = 0 m/s

Final velocity = 26.8 m/s

Time = 1.9 seconds

Acceleration = change in velocity/time

\(a = \frac{26.8}{1.9}\)

The equation to find displacement (Δx) with given starting and final velocity, time, and acceleration is:

\(x = x_{0} + v_{0}t + \frac{1}{2} at^{2}\)

Starting position and initial velocity both equal 0, so

\(x = \frac{1}{2} at^{2}\)

\(x=\frac{1}{2} (\frac{26.8}{1.9})(1.9)^{2}\)

x = 25.46m

Rounded to the nearest whole number, x = 25m

Answer:

You would ultimately need to calculate the Velocity, which is, B)

Explanation:

I hope this helps, if it doesn't then just message me and ill be more than happy to help :)

Sputnik 1, the first man-made satellite, was released by the Eastern Bloc on October 4, 1957, as part of the Sputnik project, with Sergei Korolev serving as the program's primary designer.

There are a large number of satellite in use. They serve several functions, including the Satellite Navigation System, amateur radio, television transmission, and weather prediction. In order to conduct studies and acquire data, they also employ telescopes to gaze outwards at the solar system.

Natural and artificial satellite are two distinct categories. The Earth and the Moon are two examples of organic satellites. The Moon orbits the earth while the Earth revolves around the Sun.

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The absolute value of price elasticity of demand equals 2.50 if quantity demanded rises by 10 percent as price falls by 4 percent.

In economics, price elasticity of demand is used to measure the degree of responsiveness of the quantity of a product demanded with respect to its price. It is an essential measure for a business to determine the behavior of consumers towards changes in the price of its product.Price elasticity of demand formula is:Price elasticity of demand = (% change in quantity demanded) / (% change in price)From the given problem,Quantity demanded increases by 10% as price falls by 4%.

Mathematically, we can say that,% change in quantity demanded = 10%

= 0.1% change in price

= - 4%

= - 0.04

By substituting these values into the elasticity of demand formula, we get:Price elasticity of demand = (% change in quantity demanded) / (% change in price)Price elasticity of demand = 0.1 / (-0.04)Price elasticity of demand

= -2.5Taking absolute values, we get:

Absolute value of price elasticity of demand = 2.5

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a) The unit vector in the direction of a is (0.993, 0.117).

b) The Cartesian vector representing the force is (24.825, 2.925).

c) The mechanical work done is 275 Joules.

The unit vector in the direction of vector a can be found by dividing vector a by its magnitude. In this case, vector a = [6, 1], so the magnitude of a is √(6² + 1²) = √37. Dividing vector a by its magnitude yields (6/√37, 1/√37), which simplifies to approximately (0.993, 0.117).

To find the Cartesian vector representation of the force, we multiply the unit vector from part a) by the magnitude of the force, F = 25 N. The result is (0.993 * 25, 0.117 * 25), which simplifies to (24.825, 2.925).

To determine the mechanical work done, we use the formula W = F * d * cos(θ), where W is the work done, F is the force, d is the displacement, and θ is the angle between the force and displacement vectors.

In this case, the force is F = 25 N, and the displacement is the difference between the x-coordinates of the two points, which is 15 - 4 = 11 meters. Since the force and displacement are in the same direction (θ = 0°), cos(θ) = 1.

Plugging in the values, we get W = 25 * 11 * 1 = 275 Joules.

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Answer: The answer is B

Explanation: using newton's third laws of motion,the force applied between two objects is same in magnitude and has opposite direction.since two objects have same force,small car has large acceleration than the truck because it has less mass.

Answer:

two or more substances

Explanation:

A chemical reaction can't take place if there is only one substance

Answer:

A chemical reaction is the change that takes place when two

or more substances interact to form new substances.

Explanation:

Chemical reactions occur when chemical bonds between atoms are formed or broken. The substances that go into a chemical reaction are called the reactants, and the substances produced at the end of the reaction are known as the products.

u=0

a=10.9m/s^2

s=226m

v^2-u^2=2as

v^2=2 (10.9)(226)

v^2=49268

v=70.2m/s^2

v=u+at

70.2=0+10.9 (t)

70.2/10.9=t

t=6.44s

Answer:

lightning conductors/rods protect buildings by intercepting lightning strikes that may hit these structures.

Air conditioners pass air over cold coils known as evaporator pipes

Explanation:

Lightning rods are made of highly conductive metal, and offer a path of least resistance for any lightning strikes and are connected to longer wires that ground the charge.

air conditioners use a chemical compound called a refrigerant. the most common refrigerant used is r-134a also know as 1,1,1,2-Tetrafluoroethane.  cooling systems use the low boiling points of these refrigerants to constantly cool and compress the chemical to continually move heat from the inside of the system to an external area.

If a screw had a circumference of 16mm and a lead of 0.4mm and 15N of force is applied, the force produced would be 0.375N.

The mechanical advantage of a screw is determined by its lead, which is the distance traveled by the screw in one complete rotation. The formula for calculating the force produced by a screw is F = (T * p) / (2πr), where F is the force produced, T is the torque applied, p is the lead of the screw, and r is the radius of the screw.

In this case, the screw has a circumference of 16mm, so its radius is 16mm / 2π = 2.546mm. The lead of the screw is given as 0.4mm, and the force applied is 15N. Substituting these values into the formula, we get:

F = (T * p) / (2πr)

  = (15N * 0.4mm) / (2π * 2.546mm)

  = 0.375N

As a result, the screw produces 0.375N of force. This means that for every 15N of force applied to the screw, it produces a mechanical advantage of 0.375N, which is a measure of the force amplification achieved by the screw.

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The distance from the central maximum to the first-order minimum along a wall 6.50 m from the window is approximately 0.764 m.

To solve this problem, we can use the equation for the distance between adjacent maxima or minima in a single-slit diffraction pattern:

d*sin(theta) = m*lambda

where d is the width of the slit (in this case, the width of the window), theta is the angle between the direction of the diffracted wave and the direction of the incident wave, m is the order of the maximum or minimum (0 for the central maximum, 1 for the first-order minimum, 2 for the second-order maximum, etc.), and lambda is the wavelength of the microwaves.

We can rearrange this equation to solve for the distance between the central maximum and the first-order minimum:

sin(theta) = m*lambda/d

For the first-order minimum, m = 1. Plugging in the given values, we get:

sin(theta) = (1)*(5.00 cm)/(45.0 cm) = 0.111

To find the angle theta, we can use the small-angle approximation:

theta = sin(theta) = 0.111

Now we can use basic trigonometry to find the distance from the window to the first-order minimum on the wall:

tan(theta) = opposite/adjacent

opposite = tan(theta)*adjacent = tan(0.111)*(6.50 m) = 0.764 m

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Answer:

The Vacuole

Explanation:

The Vacuole

Answer:

Forces Acting in Opposite Directions

In general, whenever forces act on an object in opposite directions—like the book on the table—the net force is equal to the difference between the two forces. In other words, one force is subtracted from the other to calculate the net force.

Hope I helped!!!

Answer:

The anwser is b

Explanation:

Answer:

the answer is B

I know  because i just did it

Answer:

See below

Explanation:

For the, just remember the equation

F = m a

1000 N = 1980 kg  * a

1000/1980 = a = .505 m/s^2

1.59 seconds

It takes 1.59 seconds for the stone to reach the ground.

a = -9.8 m/s^2

v = -9.8t -8 m/s

s = -4.9 t2 -8t +25

So… -5t^2 -8t + 25 =0,

on rearranging to 5t^2 + 8t - 25

This gives us t=1.59 seconds.

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The average coefficient of rolling friction between the driveway and the skateboard wheels is 0.112.

the average coefficient of rolling friction between the driveway and the skateboard wheels, we need to use the equation:

f_friction = μ * f_norm

where f_friction is the force of friction, μ is the coefficient of rolling friction, and f_norm is the normal force.

the force of gravity on the boy and skateboard:

f_norm = 590 N

the boy starts coasting at 5.5 m/s and comes to a stop in 5.0 s, so we can use the equation:

v_final = v_initial + a * t

where v_initial is the initial velocity, v_final is the final velocity (which is 0 m/s since the boy comes to a stop), a is the acceleration, and t is the time.

Solving for acceleration, we get:

a = (v_final - v_initial) / t
a = (0 - 5.5) / 5.0
a = -1.1 m/s^2

The negative sign indicates that the acceleration is in the opposite direction of the initial velocity, which makes sense since friction is acting to slow down the boy's motion.

the force of friction using Newton's second law:

f_friction = m * a

where m is the combined mass of the boy and skateboard.

m = 60 kg
a = -1.1 m/s^2

f_friction = 60 kg * (-1.1 m/s^2)
f_friction = -66 N

Note that the force of friction is negative because it acts in the opposite direction of the motion.

Finally, we can plug in the values for f_norm and f_friction to solve for the coefficient of rolling friction:

f_friction = μ * f_norm

-66 N = μ * 590 N

μ = -66 N / 590 N
μ = -0.112

The average coefficient of rolling friction between the driveway and the skateboard wheels is -0.112. However, since coefficients of friction are always positive, we need to take the absolute value of this result:

μ = 0.112

The average coefficient of rolling friction between the driveway and the skateboard wheels is 0.112.

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According to Boyle's Law, there is an inverse relationship between pressure and gas volume.

Therefore, option b. There is an inverse relationship between pressure and gas volume is the correct answer.

Boyle's Law is defined as the principle that explains the relationship between the volume and pressure of a gas at a constant temperature. It is formulated by Robert Boyle, an Irish physicist and chemist, in the 17th century. Boyle's Law states that the pressure of a given amount of gas is inversely proportional to its volume, provided the temperature remains constant.

Mathematically, it can be expressed as

P₁V₁ = P₂V₂,

where P₁ and V₁ are the initial pressure and volume of the gas, respectively, and P₂ and V₂ are the final pressure and volume of the gas. Therefore, option b. There is an inverse relationship between pressure and gas volume is the correct answer.

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C. Catalysis occurs at a faster rate as temperature increases

The correct statement describing the effect of temperature on the activity of an enzyme when the temperature is higher than the optimum temperature is:

D. The functional 3-D shape of the enzyme is lost

At temperatures higher than the optimum temperature, the enzyme's three-dimensional structure can be denatured or disrupted, leading to a loss of its functionality.

This is because the increased temperature can break the weak bonds (such as hydrogen bonds) and disrupt the hydrophobic interactions that are important for maintaining the enzyme's active conformation. As a result, the enzyme's catalytic activity decreases rather than increasing.

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Law of Reflection :

The law of reflection states that when light rays strike a smooth surface, the angle of reflection equals the angle of incidence, and the incident ray, reflected ray, and normal to the surface all lie in the same plane.

Here, let us consider, the ray A as the normal , as it is perpendicular to the surface of the plane mirror. When the incident ray hits the plane mirror at an angle say, θ  with the normal ( here, incident ray A) , then, θ will be  the angle of reflection.

Now if we consider all the incident rays A, B, C and D. Among them, let the ray C  make an  angle  Θ, with the normal ( here, incident ray A).

Therefore, from the image given, clearly,  θ = Θ, hence Θ is the angle of reflection, thus ray C best represents the reflected ray.

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Answer:

d. zero

Explanation:

Constant velocity means the acceleration is zero. In this case the velocity does not change,

hope this helps you

have a good day :)

The role of a proton pump in energy conversion is to create a proton gradient, which is utilized by ATP synthase to make ATP.

Energy conversion is the transformation of one energy form into another, such as chemical to electrical energy or thermal to mechanical energy. Energy conversion is frequently necessary in order to obtain useful energy from raw energy sources like fossil fuel or solar radiation.

A proton pump is a form of protein that moves protons across a biological membrane. The proton-motive force or proton gradient is created by the proton pump. The proton gradient, as previously stated, is an energy-dense system that can be used by ATP synthase to generate ATP.

In summary, the role of a proton pump in energy conversion is to create a proton gradient, which is utilized by ATP synthase to make ATP.

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The light will continue to travel at 34.8° with the normal. The result is obtained by using the Snell's Law.

The Snell's Law is a formula to describe the relationship between the angles of incidence and refraction when a light passes through two medias. It can be expressed as

ni / nr = sin θr / sin θi

Where

Note that the angles are measured from the normal line.

The critical angle can be expressed as

sin θc = ni / nr

If the critical angle is 53.7° and the light enters the substance from air at 45.0° with the normal, what angle with the normal will it continue to travel?

We can combine the above two formulas to find the refracted angle.

ni / nr = sin θr / sin θi

sin θc = sin θr / sin θi

sin 53.7° = sin θr / sin 45°

0.806 = sin θr / 0.707

sin θr = 0.707 × 0.806

sin θr = 0.570

θr = 34.8°

Hence, the light will continue to travel at 34.8° with the normal.

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