Point a is located 0.197 m away from a charge of - 3.52 x 10-9 c. point b is located 0.506 m away from the charge. what is the electric potential difference vb - va between these two points?

Answer:

150w

Explanation:

power = workdone/time

9000/60

150w

Taking into account the definition of density, the volume of the sample of gold is 0.0646998 L.

Density is defined as the property that allows us to measure the amount of mass in a certain volume of a substance.

The expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

density= mass÷ volume

From this expression it can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.

In this case, you know that:

Replacing in the definition of density:

19.32 g/cm³= 1250 g÷ volume

Solving:

19.32 g/cm³× volume= 1250 g

volume= 1250 g÷ 19.32 g/cm³

volume= 64.6998 cm³= 0.0646998 L (1 cm³= 0.001 L)

In summary, the volume of the sample of gold is 0.0646998 L.

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The electric field at the surface of the atom is E = 1/(4πR²) * (e/ε₀). At the surface of an atom, the value of the electric field (e) is dependent on the charge of the atom's nucleus and the arrangement of its electrons.

The electric field is defined as the force experienced by a unit charge at a certain point. At the surface of an atom, the electric field can be expressed as a multiple of e/ϵ0, where e is the elementary charge and ϵ0 is the permittivity of free space. The exact value of the electric field at the surface of an atom depends on the specific atom and the conditions it is in. However, it is generally very weak and only detectable through specialized techniques such as scanning tunneling microscopy.
It appears that you're asking about the electric field (E) at the surface of an atom. To calculate this, we'll consider the atom as a uniformly charged sphere.

1. Define the quantities: Let e represent the elementary charge (1.6 x 10^-19 C), ε₀ represent the vacuum permittivity (8.85 x 10^-12 C²/Nm²), and R be the radius of the atom.

2. Calculate the total charge (Q) on the atom: As an example, let's assume we have a positive ion with one missing electron. Therefore, Q = e.

3. Use the electric field formula for a charged sphere: E = Q/(4πε₀R²)

4. Substitute the given values: E = e/(4πε₀R²)

5. Express E as a multiple of e/ε₀: Divide both sides of the equation by e/ε₀:

E/(e/ε₀) = (e/(4πε₀R²)) / (e/ε₀)

6. Simplify the expression: E/(e/ε₀) = 1/(4πR²)

Thus, the electric field at the surface of the atom is E = 1/(4πR²) * (e/ε₀).

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A beam of blue light causes photoelectrons to be emitted from a photoemissive surface. An increase in the intensity of the blue light will cause an increase in the number of photoelectrons emitted. Therefore, an increase in the intensity of blue light will cause an increase in the light intensity.

What is light? Light is a type of electromagnetic radiation that travels in waves at a velocity of 299,792 kilometers per second (km/s) in a vacuum. It is a form of energy and, like all forms of energy, can be transferred. Light, like other electromagnetic waves, has both electric and magnetic fields that oscillate perpendicularly to one another at right angles.Light has a very important property, which is its intensity. The amount of light that passes through a given area or space per unit time is known as light intensity. It is the amount of light energy that falls on a unit area in a given time. The energy of light, like all energy, can be described in terms of photons.

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The tension force on the string with a ball of mass 3.56 kg attached to it is 35 N.

Tension force is defined as the force transmitted through a rope, string or wire when pulled by forces acting from opposite sides.

To calculate the tension force in the string, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the tension force on the string is 35 N.

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Answer:

Tstring = 343.35 [N]

Explanation:

Since the block is in equilibrium, we can say that the sum of the forces on the Y-axis or vertical is equal to zero.

∑Fy = 0

\(T_{string}-W=0\)

where:

Tstring = tension of the string [N]

W = weight of the block [N]

And the weight can be calculated multiplying the mass of the block by the gravity acceleration.

Now replacing:

\(T_{string}=m*g\\T_{string}=35*9.81\\T_{string}=343.35[N]\)

Answer:

Mass (m) = 5.4 kg

Force (f) = 20 N

Acceleration (a) = ?

Acceleration= m × a

\(m \times a \\ = 5.4 \times 20 \\ = 108 \: ms ^{ - 2} \)

=> The resulting acceleration of the object is 108 m/s².

Answer:

6.25 sec

Explanation:

Given: initial velocity = 15 m/s final velocity = 25 m/s, and distance = 125 m

average velocity = (25 + 15)/2

Distance(D) = Rate(R) x Time(T)

125 = ((25 + 15)/2) x T

125 = 20T

T = 6.25 sec

Hence the required time to achieve final speed is 6.25 sec

Answer:

See below

Explanation:

Here is another way

d = vo t + 1/2 a t^2        a = change vel /change t =  10/t

125 = 15 t + 1/2 (10/t) t^2

125 = 20 t

t = 125/20 = 6.25 s

Answer:

MOMENTUM= FORCE*MASS

= 140*5

= 700 kg⋅m/s

Answer:

Water is essential for all forms of life and can dissolve nearly anything. It can exist as a gas (water vapour and steam), a liquid (water) and a solid (ice).

Water covers 75% of the earth’s surface, however only a very small amount is fresh water that can be used directly by people, animals and plants because:

97% of this water is in oceans and is too salty for people, animals or plants to use

2% is frozen at the north and south poles, in glaciers and on snowy mountain ranges.

Water, by its simplest definition, is life. Every living thing on Earth requires water to survive. Water means different things to different people. The conversation on World Water Day centers on solving the global water and sanitation crisis, which will require everyone to do their part. To help with this discussion we are sharing information about World Water Day, sustaining water, the water cycle, why water is so essential for human life and more!

To calculate the normal force exerted by the seat of the car on the passenger when the car is at the bottom of the depression, we need to consider the forces acting on the passenger.

At the bottom of the depression, the passenger experiences an inward net force directed towards the center of the circular path. This force is provided by the normal force exerted by the seat. To determine the normal force, we need to consider the centripetal force acting on the passenger.

The centripetal force can be calculated using the formula:

F_c = m * a_c

where F_c is the centripetal force, m is the mass of the passenger, and a_c is the centripetal acceleration.

The centripetal acceleration is given by:

a_c = v² / r

where v is the velocity of the car and r is the radius of the circular depression.

Given:

Velocity of the car (v) = 10 m/s

Radius of the depression (r) = 30 m

Mass of the passenger (m) = 60 kg

First, we calculate the centripetal acceleration:

a_c = (10 m/s)² / 30 m = 100 m²/s² / 30 m = 10/3 m/s²

Now, we can calculate the centripetal force:

F_c = (60 kg) * (10/3 m/s²) = 200 N

Since the normal force exerted by the seat is equal to the centripetal force, the normal force is 200 N. Therefore, the normal force exerted by the seat on the 60 kg passenger at the bottom of the depression is 200 N.

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Answer: A

Explanation: STEP BY STEP

Answer:

below

Explanation:

that is the procedure above

Answer:

We have the position vector given in terms of time t. r(t) = t^3*i + t^2*j

To find the velocity vector we have to differentiate r(t) with respect to time.

r'(t) = 3t^2*i + 2t*j

The vector representing acceleration is the derivative of the position vector

r''(t) = 6t*i + 2*j

When time t = 2.

The velocity vector is 3*2^2*i + 2*2*j

=> 12*i + 4*j

The speed is the absolute value of the velocity vector or sqrt(12^2 + 4^2) = sqrt (144 + 16) = sqrt 160

The acceleration vector is 6*2*i + 2*j

=> 12*i + 2*j

The required acceleration at t=2 is 12*i + 2*j and the speed is sqrt 160.

Explanation:

Can I have thx and brainliest?

Answer:

1. B

2. B

Explanation:

1. he was the only teacher at that time that figured out that everything doesn't revolve around us. he figured it out by a telscope he made from three lens and a tube. its actually pretty cool. He found out that venus first was in front of us.

2. if the earth wasn't at a tilt, then we wouldn't have sessons, when the earth rotate around the sun, the earth is roataing at a title axis. and that changes our seesons, because if we are in south america, and we are in winter time, and south america is cold, then it means that the continent is not getting as much heat from the sun. Does that makes since, because it doesn't sound like it?

Answer:

39

Explanation:

calculator

Answer:

39 is the answer. of your questions

In both the cases gravitational potential energy is same.

Gravitational potential energy is energy an object possesses because of its position in a gravitational field. The most common use of gravitational potential energy is for an object near the surface of the Earth where the gravitational acceleration can be assumed to be constant at about 9.8 m/s².

Given two cases height of the top is 3 ft so the potential energy is same as potential energy is dependent on height of the ball.

In both the cases gravitational potential energy is same.

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Water will have the higher surface tension since it exhibits **stronger intermolecular forces** when compared to acetone.

Surface tension is a property of liquids that arises from the cohesive forces between molecules at the surface. In water, the intermolecular forces, specifically hydrogen bonding, are relatively strong, leading to a higher surface tension. These hydrogen bonds create a network of cohesive forces that hold the water molecules together, causing the surface to behave like a stretched elastic sheet.

Acetone, on the other hand, is a smaller molecule and does not exhibit as strong intermolecular forces compared to water. The intermolecular forces in acetone, such as dipole-dipole interactions and London dispersion forces, are weaker than the hydrogen bonding in water. As a result, acetone has a lower surface tension than water.

Therefore, water will have the higher surface tension due to its stronger intermolecular forces.

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Answer:

Ionic compounds conduct electricity when dissolved in water

Explanation:

Answer:

135N will cause a 45 kg object to accelerate at a rate of 3.0 m/s2

Explanation:

Force = mass * acceleration

Force = 45 kg * 3 m/s2

Force = 135N

Force=F

Apply Newton's second law

\(\\ \tt\longmapsto F=ma\)

\(\\ \tt\longmapsto F=45(3)\)

\(\\ \tt\longmapsto F=135N\)

Answer:

The substance is changing state from a gas to a liquid to a solid. As the temperature changes we also know that A

Explanation:

If you find yourself approaching from the downwind side, you should use the distance from the incident to your maximum advantage or switch to wearing a self-contained breathing apparatus (SCBA).

The self-contаined breаthing аppаrаtus, or SCBА, is the foundаtionаl tool thаt provides the greаtest аmount of аirwаy protection from toxic gаs аnd hаrmful pаrticulаtes resulting from the fire. It’s essentiаl for modern firefighting аnd todаy’s complex fire grounds.

The term self-contаined meаns thаt the SCBА is not dependent on а remote supply of breаthing gаs (e.g., through а long hose). If designed for use under wаter, it is аlso known аs а Scubа set (self-contаined underwаter breаthing аppаrаtus). When not used underwаter, they аre sometimes cаlled industriаl breаthing sets. Unofficiаl nаmes include аir pаck, аir tаnk, oxygen cylinder or simply pаck, which аre mostly used in firefighting.

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Answer:

300,000 kg·m/s

Explanation:

Answer: Velocity of the particle is 11m/s.

What is velocity ?

-- Velocity is the directional speed of an object in motion as an indication of its rate of change in position as observed from a particular frame of reference and as measured by a particular standard of time

-- Velocity is vector quantity.

-- Standard unit for the measurement is Metre/Second .

In this question we have given.

Initial velocity = 3m/s

Acceleration = 2m/s^2

We ned to find the velocity after 4 sec.

In this module we use

which is V = U + at

here :; V= 3 + 4× 2

V = 3 + 8.

V = 11 m/s .

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The specific heat capacity of copper is 0.888 kJ/(kg × °C).

Specific heat capacity is a thermal property of a substance. It indicates how much heat energy is needed to raise the temperature of a unit mass of a substance by one degree Celsius.

The formula for calculating the specific heat capacity of a substance is given as, q = m × c × ∆T`

Where: q = energy,

m = mass of the substance,

c = specific heat capacity of the substance,

∆T = change in temperature.

Now, let’s use the formula above to calculate the specific heat capacity of copper.

The energy required to raise the temperature of a 1 kg block of copper by 10°C is 8.88 kJ.

q = m × c × ∆T

c = q / (m × ∆T)

= 8.88 kJ / (1 kg × 10°C)

= 0.888 kJ/(kg × °C)

The specific heat capacity of copper is 0.888 kJ/(kg × °C).

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The length of RG, given the data from the question is 14

From the question given above, the following data were obtained:

We can obtain the length of RG as illustrated below:

Length of PG = Length of PR + Length of RG

Thus,

Length of RG = Length of PG - Length of PR

Length of RG = 16 - 2

Length of RG = 14

Therefore, we can conclude that the length of RG is 14

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Answer:i have none but good luck also this is a learning site ;-;

Explanation:

If the polls margin of error for 95% confidence was 4%, this means that we can be sure that the percent of all adults who want to lose weight is between 50% and 58%. Therefore, the correct option is B.

This is because the margin of error for the poll was 4% at a 95% confidence level, which means that if the poll were to be repeated numerous times, 95% of those times the results would be within 4% of the true population value. Therefore, we can say with 95% confidence that the true percentage of adults who want to lose weight is between 50% and 58%.

The statement "the poll used a method that gets an answer within 4% of the truth about the population 95% of the time" is not entirely accurate. The margin of error means that the sample results are within 4% of the true population value 95% of the time, not the method used to conduct the poll.

While it is possible that the results of a second poll using the same method would also fall between 50% and 58%, we cannot say this for certain. Each poll is a random sample, and therefore there is some variability in the results. However, we can say with 95% confidence that the true population value falls within this range.

Hence, the correct answer is option B.

Note: The question is incomplete. The complete question probably is: A Gallup poll in November 2012 found that 54% of the people in the sample said they wanted to lose weight. The polls margin of error for 95% confidence was 4%. This means that a) the poll used a method that gets an answer within 4% of the truth about the population 95% of the time b) we can be sure that the percent of all adults who want to lose weight is between 50% and 58% c) if Gallup takes another poll using the same method, the results of the second poll will lie between 50% and 58%.

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Answer:

The net force on the box is 2N and it will make the box to move in a leftward direction

Explanation:

We should understand first of all that forces are vectors. This means that they have both magnitude and direction.

The next thing we will need to do is to set a coordinate system. Let the leftward forces be negative while the rightward forces are positive.

That means that the equivalent forces on the box will be -5N + 3N = - 2N

Hence, the net force on the box is 2N and it will make the box to move in a leftward direction