What two forces have an effect on objects from a distance

Answer:

a) ΔV ’= 1.66 10¹ V= 16.6 V,  b)  U = 55.64 10⁻¹² J,  c)    U_f = 1.18 10⁻¹⁰ J

d)     W = 6.236 10⁻¹¹ J

Explanation:

Capacitance can be found for a parallel plate capacitor

          C = ε₀  \(\frac{A}{d}\)  

Let's reduce the magnitudes to the SI system

           A = 9.30 cm² (1 m / 10² cm) 2 = 9.30 10⁻⁴ m²

           c = 4.50 mm (1 m / 1000 mm) = 4.50 10⁻³ m

          Co = 8.85 10⁻¹²    9.30 10⁻⁴ /4.50 10⁻³

          Co = 1.829 10⁻¹² F

when the plates separate at d = 9.60 10⁻³ m, the capcitance changes to

          C = ε₀ \frac{A}{d_1}

          C = 8.85 10⁻¹² 9.30 10⁻⁴/9.60 10⁻³

          C = 8.57 10⁻¹³ F

a) the potential difference

            C =

since the capacitor is not discharged, let's look for the initial charge

            Co = \frac{Q}{ \Delta V}

             Q = C₀ ΔV

              Q = 1.829 10⁻¹² 7.80

             Q = 14.2662 10⁻¹² C

when the condensate plates are separated

             C = \frac{Q}{ \Delta V' }

              ΔV ’= Q / C

              ΔV ’= 14.266 10⁻¹² / 8.57 10⁻¹³

              ΔV ’= 1.66 10¹ V= 16.6 V

b) the stored energy is

             U = ½ C ΔV²

for initial separation

              U = ½ C₀ ΔV²

             U = ½ 1.829 10⁻¹² 7.80²

              U = 55.64 10⁻¹² J

c) The energy for end separation;

               U_f = ½ C DV’2

                U_f = ½ 8.57 10⁻¹³ 16,6²2

                U_f = 1.18 10⁻¹⁰ J

d) The work

as there are no losses, the work is equal to the variation of the energy

                W = ΔU = U_f -U₀

                 W = 1.18 10⁻¹⁰ - 55.64 10-12

                 W = 6.236 10⁻¹¹ J

Answer: Both static and kinetic coefficients of friction depend on the pair of surfaces in contact. Their values are determined experimentally. For a given pair of surfaces, the coefficient of static friction is larger than the kinetic friction. The coefficient of friction depends on the materials used.

Explanation:

the coefficient of static friction is larger than the kinetic friction.

Answer:

The coefficient of kinetic friction and the coefficient of static friction are both affected by the area of contact between two surfaces in contact. The following is a detailed explanation of how the values of these coefficients are affected by the area of contact.

The coefficient of kinetic friction is defined as the ratio of the force required to maintain a constant velocity between two surfaces in contact to the normal force pressing them together. It is a measure of the resistance to motion between two surfaces in contact. The coefficient of kinetic friction is affected by several factors, including the nature of the surfaces in contact, their roughness, and their temperature. However, the area of contact between two surfaces also plays a crucial role in determining the coefficient of kinetic friction.

The larger the area of contact between two surfaces, the greater the frictional force acting between them. This is because a larger area of contact means that there are more points of interaction between the two surfaces, which leads to a greater number of intermolecular forces acting between them. As a result, it becomes more difficult to maintain a constant velocity between two surfaces with a larger area of contact, and hence, the coefficient of kinetic friction increases.

On the other hand, the coefficient of static friction is defined as the ratio of the maximum force required to initiate motion between two surfaces in contact to the normal force pressing them together. It is a measure of the resistance to motion when an object is at rest on a surface. Like the coefficient of kinetic friction, it is also affected by several factors including surface roughness and temperature. However, unlike the coefficient of kinetic friction, it is not affected significantly by changes in area of contact.

This is because when an object is at rest on a surface, it does not matter how much area it covers on that surface. The maximum force required to initiate motion remains constant regardless of whether an object has a small or large area in contact with another surface. Therefore, changes in area of contact do not significantly affect the coefficient of static friction.

The correct statement is, the system performed 800 J of work on its surroundings.

The given parameters:

Apply first law of thermodynamics;

ΔU = Q + W

where;

In adiabatic process no heat is gained or lost by the system.

Q = 0

ΔU = W  (work is positive when it is done on the system by its surrounding)

If work is done by the system to the surrounding, the new equation becomes;

ΔU = - W

W = - ΔU

W  = -800 J

This implies that the system performed 800 J of work on its surroundings.

"Your question is not complete, it seems to be missing the following information";

In a thermodynamic process, the internal energy of a system in a container with adiabatic walls decreases by 800 J. Which statement is correct?

a. The system lost 800 J by heat transfer to its surroundings.

b. The system gained 800 J by heat transfer from its surroundings.

c. The system performed 800 J of work on its surroundings.

d. The surroundings performed 800 J of work on the system.

e. The 800 J of work done by the system was equal to the 800 J of heat transferred to the system from its surroundings.

Learn more about first law of thermodynamics here: https://brainly.com/question/20335201

Answer:

what are the choices

Explanation:

Answer:

Landforms are a result of a combination of constructive and destructive forces. Collection and analysis of data indicates that constructive forces include crustal deformation, faulting, volcanic eruption and deposition of sediment, while destructive forces include weathering and erosion.

Explanation:

The speed of the ambulance is 33.35 m/s and the frequency heard after the ambulance passes is 667.07 Hz.

Calculation:-

V = f(344 - 15.6/344 - vs)

740 = 700(344 - 15.6/344 - vs)

344 - V s = 70/74 (344 - 15.6)

344 - V s = 310.64

  V s = 33.35 m/s

After pass

F = 700 ( 344 + 15.6/344 + 33.35)

   = 700 × 359.6/377.35

 F = 667.07 Hz

Frequency is the wide variety of occurrences of a repeating event in line with a unit of time. The time period frequency refers to the variety of waves that pass a set factor in unit time. It additionally describes the number of cycles or vibrations undergone for the duration of one unit of time with the aid of a body in periodic motion.

Learn more about frequency here:-https://brainly.com/question/254161

#SPJ1

The mistakes in the results include options (v) and (vii) which do not follow the five golden rules for reporting results.

The five golden rules for reporting results are:

Using these rules, identify the mistakes in the given results as:

(v) 97.1 × 10³ ± 276Ω - The uncertainty is reported to an inappropriate number of significant figures and the units are not consistent.

(vii) 98.6 × 10³ ± 3 × 10^(-Q) - The uncertainty is not reported to the same number of decimal places as the measured value, and the units are not consistent.

Learn more on golden rules here: https://brainly.com/question/30453910

#SPJ1

When the wood comes down the change in potential energy of mass 2 kg and velocity 12 m/s is 144 J.

When the object is thrown vertically upwards, the height increases. The potential energy also increases with respect to the height. The potential energy is maximum, and the kinetic energy is zero when the stone moves vertically upwards.

When the object comes down, the potential energy decreases and results in increasing in kinetic energy. When the stone comes down, the potential energy is converted to kinetic energy, and the change in potential energy results in kinetic energy.

From the given,

mass of the wood (m) = 2kg

the velocity of the wood (v) = 12 m/s

kinetic energy (K.E) = mv² / 2

                                = (2×12×12) / 2

                                = 144 J

Thus, the change in kinetic energy is 144 J.

Learn more about Kinetic energy :

https://brainly.com/question/999862

#SPJ1

The rules of energy conservation and angular momentum conservation ensure that any rotating, collapsing cloud will finish up as a spinning disk.

Momentum is defined in Newtonian physics as the product of an object's mass and velocity. It is a vector quantity with magnitude and direction. Momentum is a measure of mass in motion: how much mass is involved in how much movement. It is commonly denoted by the sign p. Momentum is clearly defined as the measure of an object's kinetic energy. In layman's terms, momentum is the product of mass and velocity. Complete response: Simply said, momentum is concerned with the quantity of motion. It can also be referred to as the preserved quantity.

Here,

The laws of energy and angular momentum conservation guarantee that any rotating, collapsing cloud will end up as a spinning disk.

To know more about momentum,

https://brainly.com/question/22418297

#SPJ4

My guess is; The warmer ocean adds water vapor to the air mass.

I'm really sorry if I'm wrong

The warmer ocean adds water vapor to the air mads

Answer:

The value is \(t_1 = 9 \ s \)

Explanation:

Generally the velocity attained by the sled after t = 3.10 s is mathematically evaluated using the kinematic equation as follows

\(v = u + at\)

Here u = 0 \ m/s

a = 13.5 \(m/s^2\)

So

\(v = 0 + 13.5 * 3.10 \)

=> \(v = 41.85 \ m/s \)

The is distance it covers at this time is

\(s = u * t + \frac{1}{2} a * t^2\)

=> \(s = + \frac{1}{2} * 13.5 * 3.10^2\)

=> \(s =64.87 \)

Now when sled stops its the final velocity is \( v_f = 0 m/s \) while the initial velocity will be the velocity after its acceleration i.e \(v = 41.85 \ m/s \)

So

\(v_f = v + a_1t_1\)

Here  \(a_1 =  - 4.65\), the negative sign shows that it is deceleration

So

           \(0  =  41.85  - 4.65 *  t_1\)

=> \(t_1 = 9 \ s \)

Answer:

31475404.8 kg/day

Explanation:

From the information given:

The power plant capacity W = 3570 MW

Energy content of the coal = 28000 kJ/kg

let assume that the thermal efficiency = 35%

Recall that:

1 kw = 3600 kJ/hr provided that the energy conversion is 100% efficient

But assuming the thermal efficiency = 35%.

Then:

Heat input = 3600/0.35 = 10286 kJ/kw.hr

Now, for producing 1 kw.hr, the quantity of the required coal = 10286/28000

= 0.36736 kg

For 3570 MW, the amount of coal that must be input is:

= 0.36736 kg × 3570000

= 1311475.2 kg/hr

= 1311475.2 × 24 kg/day

= 31475404.8 kg/day

Answer: light, gamma waves, radiowaves

Explanation:

The moment of inertia of the flat square is MA²/6

The moment of inertia of a body is a property of the body which shows its ability to ritate about an axis.

To find the moment of inertia of the flat square through its center of mass, we know that the moment of  inertia of  a rectangular slab is given by

I = M(a² + b²)/12 where

Now, for a flat square a = b. so,its moment of inertia is I = M(a² + b²)/12

I = M(a² + a²)/12

= 2Ma²/12

= Ma²/6

Now for the given flat square, we have that

So, substituting these into the equation of moment of inertia for the flat square, we have that

The moment of inertia of the flat square is given by

I = Ma²/6

I = MA²/6

So, moment of inertia is MA²/6

Learn more about moment of inertia of flat square here:

brainly.com/question/29840049

#SPJ1

The speed of the roller coaster at the bottom of the hill if the track was frictionless is 34.04 m/s.

Given that the weight of the roller coaster is 2000 kg and the initial vertical drop of the ride is 59.3 m. We are to find the speed of the roller coaster at the bottom of the hill if the track was frictionless.We know that the roller coaster will lose potential energy due to the vertical drop. Assuming there is no friction, the potential energy will be converted into kinetic energy at the bottom of the hill.Considering the conservation of energy between the potential and kinetic energy, we can set the initial potential energy equal to the final kinetic energy. We can use the formula to calculate potential energy, which is PE = mgh where m = 2000 kg, g = 9.8 m/s², and h = 59.3 m. Therefore,PE = 2000 kg × 9.8 m/s² × 59.3 m = 1,157,924 JWe can use the formula to calculate kinetic energy, which is KE = 1/2mv² where m = 2000 kg and v is the final velocity. Therefore,KE = 1/2 × 2000 kg × v².The total energy remains constant as we know there is no friction. Therefore the final kinetic energy will be equal to the initial potential energy,1,157,924 J = 1/2 × 2000 kg × v²v² = (2 × 1,157,924 J) / 2000 kgv² = 1157.924v = √1157.924v = 34.04 m/s.

for such more questions on speed

https://brainly.com/question/13943409

#SPJ8

Answer:

energy level

s,p

electrons

Explanation:

I already done this trust me

In the notation 1 s² number 1 represents energy levels where electrons are located.The 4 parts on periodic table are s,p,d and f blocks.The 2 in 1 s² represents number of electrons in energy level.

Electrons present in an atom revolve in different orbits which are stationary states and are also called as energy levels. The energy levels are numbered as integers which are also called as principal quantum numbers.

Energy of the stationary state is given as E= -R

1/n² where R

is the Rydberg's constant. When an electron is excited, and it moves from lower to higher energy levels there is absorption of energy, while when it moves from higher energy level to lower energy level it radiates or gives out energy in the form of radiation.

They can also be defined as the distances between electron and nucleus of an atom . Electrons present in K energy level have least energy .Energy level diagrams are studied to understand nature of bonding , placement of electrons in orbits and and elemental behavior under certain conditions.

Learn more about energy level,here:

https://brainly.com/question/12806827

#SPJ2

In order to find out if we will be able to retrieve the souvenir, let's use y = -115 (negative because it's below the water) in the equation and calculate the value of x.

If there is at least one real solution, we will be able to retrieve the souvenir.

To solve this quadratic equation, let's use the quadratic formula:

Since there are real solutions for x, the answer is YES.

(a) The amplitude of the wave is 0.2 m.

(b) The period of the wave is  4 s.

(c) The wavelength of the wave is 100 m.

(a) The amplitude of the wave is the maximum displacement of the wave.

amplitude of the wave = 0.2 m

(b) The period of the wave is the time taken for the wave to make one complete cycle.

period of the wave = 5.5 s - 1.5 s = 4 s

(c) The wavelength of the wave is calculated as follows;

λ = v / f

where;

f = 1/t = 1 / 4s = 0.25 Hz

λ = ( 25 m/s ) / 0.25 Hz

λ = 100 m

Learn more about wavelength here: https://brainly.com/question/10728818

#SPJ1

In my opinion, it is crucial to address high unemployment rates in order to support the overall health and well-being of the community.

LeIn 2010, the city of Detroit had one of the highest unemployment rates in the country, with an official rate of 27.8%. This means that almost one-third of the city's workforce was unemployed and actively seeking work. The unemployment rate is calculated by dividing the number of unemployed people by the total number of people in the labor force, which includes those who are employed and those who are actively seeking employment.

However, the official unemployment rate does not take into account those who have given up looking for work or those who are underemployed (working part-time or in jobs that do not match their skill level). This is where alternative measures of unemployment come into play. The Bureau of Labor Statistics (BLS) calculates different measures of unemployment, including U-4, U-5, and U-6, which take into account these additional factors. In Detroit, the U-6 rate was estimated to be around 45% in 2010, which paints a more accurate picture of the true unemployment situation in the city.

High levels of unemployment have a significant impact on the economy, both locally and nationally. When people are unemployed, they have less money to spend, which leads to reduced demand for goods and services. This can in turn lead to business closures, job losses, and a further decline in the economy. Additionally, the government must spend more on social welfare programs to support those who are unemployed, which can strain the budget.

According to the Detroit News, the high unemployment rate in Detroit was linked to a decline in population and an increase in poverty rates. The Huffington Post reported that high unemployment rates can also lead to increased crime rates and lower high school completion rates. This is because unemployed individuals may turn to crime as a means of survival, and children of unemployed parents may struggle to stay in school due to financial pressures.

Learn more about unemployment:https://brainly.com/question/14227610

#SPJ1

Answer:

0.44 EST + 0.33 NTH

Explanation:

if this is incorrect and brainly removes the comments to try and sabotage you guys please report this for the sake of learning

We are given:

Mass of the Paint bucket (with paint) = 7000 grams

Mass of the paint bucket (without paint) = 500 grams

Volume of Paint in the Bucket = 5000 cm³

Mass of Paint in the Bucket:

To get the mass of the paint in the bucket, we will subtract the mass of the bucket from the mass of the paint bucket (with paint)

Mass of Paint = Mass of Paint bucket (with paint) - Mass of the paint Bucket (without paint)

Mass of Paint = 7000 - 500

Mass of Paint = 6500 grams

Density of the Paint:

We know that density = Mass / Volume

Density of Paint  = Mass of Paint / Volume occupied by Paint

Density of Paint = 6500/5000

Density of Paint = 1.3 grams / cm³

Answer:

a) 1.05rad/s

b) 1.38J

Explanation:

The maximum speed a subway train can attain between stations is 38.7 m/s. The travel time between stations is 20.8 seconds. The maximum average speed of the subway train is approximately 39.5 m/s.

To find the maximum speed a subway train can attain between stations, we can use the formula:

V² = U² + 2as

Where V is the final velocity, U is the initial velocity (assumed to be 0), a is the acceleration, and s is the distance between the stations.

V = √(2as)

V = √(2 × 1.34 m/s² × 806 m) = 38.7 m/s

Therefore, the maximum speed a subway train can attain between stations is approximately 38.7 m/s.

To find the travel time between stations, we can use the formula:

t = s / V

where t is the travel time, s is the distance between the stations, and V is the maximum speed attained by the subway train.

t = 806 m / 38.7 m/s

t = 20.8 s

Therefore, the travel time between stations is approximately 20.8 seconds.

To find the maximum average speed of the subway train, we can use the formula:

average speed = total distance / total time

In one round trip between two stations, the subway train covers a distance of 2s, because it travels from one station to the other and then back to the first station. Therefore, the total distance is 2 × 806 m = 1612 m

The subway train stops for 20 seconds at each station and the travel time between stations is 20.8 seconds, the total time for each trip between two stations would be 20.8 s + 20 s = 40.8 s

Then, the maximum average speed is:

average speed = total distance / total time

average speed = 1612 m / 40.8 s

average speed = 39.5 m/s

Therefore, the maximum average speed of the subway train, from one start-up to the next, is approximately 39.5 m/s.

To learn more about average speed visit: https://brainly.com/question/6504879

#SPJ4

The correct drills that can be used to practice digging in volleyball are b. shuffle steps and c. knock out drill.

b. Shuffle steps: Shuffle steps are an essential footwork drill for improving defensive movements, including digging.

In this drill, players shuffle laterally in a low defensive stance, simulating the movements required to dig a ball. It helps players develop quick and efficient footwork, enabling them to react and move quickly to reach the ball for a dig.

c. Knock out drill: The knock out drill focuses on improving a player's reaction time and defensive skills. In this drill, players form a line and take turns receiving rapid hits or "knocks" from a coach or teammate.

The objective is to successfully dig each hit and keep the ball in play.

This drill helps players develop their reflexes, positioning, and technique when digging in various directions and angles.

a. Double decker and 1. toss catch drill are not specific drills for practicing digging in volleyball. Double decker is a term used to describe a defensive formation, while the toss catch drill is more focused on developing ball control and setting skills rather than digging.

By incorporating shuffle steps and the knock out drill into practice sessions, players can enhance their digging abilities, improve their defensive movements, and develop the necessary skills to successfully retrieve hard-driven balls in a game situation.

For more questions on practice digging

https://brainly.com/question/13404876

#SPJ8

Answer:

equator

Explanation:

in south & north pole you could have 20+ hours daylight or night, everyday!

The object moves around an ellipse with values of a=4 and b=3.

The object is moving around an ellipse with the parametric equations:
x(t) = 4cos(?t) and y(t) = 3sin(?t).

To find the values of a and b, we can compare the parametric equations with the equation of the ellipse:
x²/a² + y²/b² = 1

We can see that the coefficient of cos(?t) in the parametric equation for x(t) corresponds to the value of 'a' in the equation of the ellipse, and the coefficient of sin(?t) in the parametric equation for y(t) corresponds to the value of 'b' in the equation of the ellipse.

Therefore, the values of a and b are:
a = 4 and b = 3

So the equation of the ellipse is:
x²/4² + y²/3² = 1

The object is moving around an ellipse with the equation:
x²/16 + y²/9 = 1
where a = 4 and b = 3.

Therefore, the object is moving around an ellipse with equation x²/a² + y²/b² where a=4 and b=3.

To know more about ellipses, refer here:

https://brainly.com/question/19507943#

#SPJ11

Answer:

Newton's Second Law is applied because of the acceleration caused by natural forces as the egg is plummeting to the earth. And the amount of acceleration the egg has will be largely affected by the amount of force Mr. Baker uses to hurl the egg to the ground.

Explanation:

hope that helps

The tension will be greater on the upper string because the lower string will only support the pull while the upper string will support the weight of the ball. The upper string is therefore more likely to break as a result.

String tension, measured in pounds or kilograms, is the force holding the strings to the racket's frame. It's important to never just say a number to your stringer when describing your preferred unit measurement! However, the majority of stringers will assume that you mean pounds. For the majority of players, the ideal string tension falls between 48 and 54 lbs. More power is available with a looser (lower) tension, but better control is possible with a tighter tension. Beginners will likely want more control, so they might initially prefer a tighter tension.

Here,

Because the upper string will be supporting the weight of the ball while the lower string will only be supporting the pull, there will be more tension on the upper string. As a result, the upper string has a higher chance of breaking.

To know more about string tension,

https://brainly.com/question/4087119

#SPJ4

Explanation:

Effective communication with patients will enable one to know the needs of the patient better as well as reducing the barriers to understanding each other for both parties.

To be an effective communicator while educating patients, the person must: