if a system does 84.0 kj of work on its surroundings and releases 105 kj of heat, what is the change in the internal energy of the system, in kj?

The acceleration due to gravity near the surface of this exoplanet is 1.49 times the acceleration due to gravity near the surface of Earth

Let M be the mass of Earth and R be the radius of Earth and let g be the acceleration due to gravity near the surface of Earth.

g = GM / R²

G = Gravitational constant.

For the exoplanet,

Mass = 7.9 M

Diameter = 2.3 ( 2R ) ( Since D = 2R )

Radius = 2.3 R

Let g' be the acceleration due to gravity near the surface of the exoplanet.

g' = G ( 7.9 M ) / ( 2.3 R )²

g' = 1.49 G M / R²

g' = 1.49 g

Therefore, the the acceleration due to gravity near the surface of this exoplanet is 1.49 times the acceleration due to gravity near the surface of Earth

The given question is incomplete. The complete question is :

One recently discovered extrasolar planet, or exoplanet, orbits a star whose mass is 0.70 times the mass of our sun. This planet has been found to have 2.3 times the earth's diameter and 7.9 times the earth's mass. How many times the acceleration due to gravity g near the earth's surface is the acceleration due to gravity near the surface of this exoplanet?

To know more about acceleration due to gravity

https://brainly.com/question/13860566

#SPJ4

When considering gravity acceleration and the force of acceleration, Option C. The direction of the force and the direction of acceleration must be the same as each other.

Acceleration is the rate of change of the velocity of an item with appreciation to time. Accelerations are vector portions. The orientation of an item's acceleration is given by the orientation of the net pressure appearing on that object.

Acceleration is the charge at which velocity modifications with time, in terms of each speed and route. A factor or an object moving in a straight line is accelerated if it quickens or slows down. movement on a circle is extended despite the fact that the rate is consistent because the course is continually changing.

Learn more about acceleration here:- https://brainly.com/question/29110429

#SPJ1

In contrast to earlier scholars,  galileo galilei and isaac newton believe about several experiments and close observation.

who was isaac newton?

Sir Isaac Newton PRS was an English mathematician, physicist, astronomer, alchemist, theologian, and author (referred to in his day as a "natural philosopher") who lived from 25 December 1642 to 20 March 1726/27[a]. He is regarded as one of the greatest mathematicians and physicists of all time and one of the most influential scientists of all time. He had a significant role in the intellectual movement known as the Enlightenment. In 1687, he wrote Philosophiae Naturalis Principia Mathematica (Mathematical Principles of Natural Philosophy), which founded classical mechanics. Additionally, Newton made important discoveries to optics, and he shares the invention of infinitesimal calculus with German mathematician Gottfried Wilhelm Leibniz.

The earlier scholars like galileo and isaaac newton believe that several experiments and close observation will be great for their theories

To learn more about isaac newton follow the given link: https://brainly.com/question/7826394

#SPJ4

Considering the molecule CCl4. Each C-Cl bond in this molecule is Polar because the electronegativity difference between C and Cl is greater than 0.4.

Carbon tetrachloride, also known by other names is an organic compound with the chemical formula CCl₄. Since CCL4 is tetrahedral in shape and symmetrical, the individual bond dipoles cancel each other and the molecule is non polar overall. But the electronegativity difference between C and Cl is greater than 0.4.

Hence, the bond of CCl4 which is C-Cl is Polar but the compound is overall non-polar.

To learn more about carbon tetrachloride visit the link- https://brainly.com/question/10963193

#SPJ4

On the inner mitochondrial membrane, an excessive energy electron is surpassed alongside an electron transport chain. The electricity launched pumps hydrogen out of the matrix area. The gradient created through this drives hydrogen returned thru the membrane, via ATP synthase.

The inner mitochondrial membrane transduces power via oxidative phosphorylation, the primary procedure liable for the production of power in the form of ATP in eukaryotic cells (Saraste, 1999).

Mitochondria, using oxygen to be had inside the cell convert chemical strength from food within the cellular to power in a shape usable to the host mobile. The procedure is known as oxidative phosphorylation and it happens in internal mitochondria.

Learn more about the inner mitochondrial membrane here

https://brainly.com/question/15599286

#SPJ4

The following are true :

C. At point 2 the concentrations of H20...O2... & H2 are all changing toward their equilibrium concentrations

D. At point 1 more reactants are converted to products than products are converted to reaction.

To learn more about equilibrium  from the given link :

https://brainly.com/question/28527601

#SPJ1

The acceleration that a 200N force would produce is 2.5m/s².

Acceleration is the amount by which a speed or velocity increases (and so a scalar quantity or a vector quantity).

The acceleration of a body can be calculated by using the following formula:

a = F/m

Where;

According to this question, a second object identical to the first object is placed on top of the first object, the acceleration required by a 200 N force if the first object had a mass of 40kg can be calculated as follows:

mass 1 + mass 2 = 40kg + 40kg = 80kg

a = 200N ÷ 80kg

a = 2.5m/s²

Therefore, 2.5m/s² is the acceleration that will be produced by the force.

Learn more about acceleration at: https://brainly.com/question/18633806

#SPJ1

The woman in high heels with a weight of 620 N and an area of one shoe  of 35 cm² exerts more pressure when standing on the floor

P = F / A

P = Pressure

F = Force

A = Area

For the woman,

F = 620 N

A = 2 * 35 cm²

A = 35 * [tex]10^{-4}[/tex] m²

P = 620 / 2 * 34 * [tex]10^{-4}[/tex]

P = 91.18 KPa

For the man,

F = 890 N

A = 2 * 0.008 m²

P = 890 / 2 * 0.008

P = 55.63 KPa

P of woman > P of man

Therefore, the woman in high heels exerts more pressure when standing on the floor

To know more about Pressure

https://brainly.com/question/20739794

#SPJ9

Answer:

is given below.

Explanation:

The threshold wavelength for the production of photoelectrons with the work function 1.7 x 10^-19 J is 11.69 x 10^-7 m.

What is threshold wavelength?

Threshold wavelength is the minimum wavelength for any incident radiation should possess in order for the photoelectric effect to take place. The wavelength of the incident light must be less than the threshold wavelength for any photoelectric emission to occur.

The threshold wavelength can be calculated as,

φ = hC / λ

where φ = work function, λ = threshold wavelength, h = Planck's constant and C = velocity of light.

λ = hC / φ = 6.625 x 10^-34 x 3 x 10^8 / 1.7 x 10^-19 = 11.69 x 10^-7 m

Therefore, the threshold wavelength for the production of photoelectrons with the work function 1.7 x 10^-19 J is 11.69 x 10^-7 m.

To learn more about threshold wavelength click on the link https://brainly.com/question/15725739

#SPJ4

Enzymes accelerate chemical reactions in cells.

Specifically lowering the threshold required to initiate the intended response. They do this by binding to another substance called a substrate. Enzymes are proteins that function as biological catalysts by accelerating chemical reactions. Molecules on which enzymes can act are called substrates, and enzymes convert substrates into various molecules known as products.

Enzymes are proteins that facilitate metabolism and chemical reactions in the body. Build some substances and break down others. All living things have enzymes. Our bodies naturally produce enzymes. Enzymes are proteins made up of amino acids linked together in one or more polypeptide chains. This arrangement of amino acids in the polypeptide chain is called the primary structure.

Learn more about Enzymes here:-https://brainly.com/question/1596855

#SPJ4

The 2023 Armada's 7-speed automatic transmission offers lower gear ratios from 1st to 4th for better acceleration.

Low gear is used when you want to increase engine power and lower vehicle speed. This puts less strain on the brakes and maximizes the car's power in situations such as towing or driving on hills. If you want to force an automatic transmission vehicle to downshift into a lower gear, you must first release the accelerator pedal.

Then drop the transmission into a lower gear and keep the speed at that level for as long as you want the car to be in that gear. You can shift from D to L while traveling in an automatic car. Today's transmission is electronic. It has a rev limiter for shifting into lower gears. The transmission will not downshift to a lower gear than the specific RPM for each gear.

Learn more about Low gear ratios here:-https://brainly.com/question/28449144

#SPJ4

Despite of magnetic field, the electron moves with a constant speed and then:

Magnetic force is balanced by electric force

Fe = Fb = 2.88 * 10^-14 N

The corresponding electric field is

E = Fe / q

E = 2.88 * 10^-14 / 1.6* 10^-19

E = 1.8 * 10^5 N/C

This means that the magnetic field redirects the movement of charges. Therefore, particles can neither gain nor lose kinetic energy. Since the Lorentz force is always perpendicular to the direction, it acts as a centripetal force on velocity particles perpendicular to the direction of the magnetic field.

Lorentz force is the force exerted on a charged particle q moving with velocity v through an electric field E and a magnetic field B. Since the magnetic force acts perpendicular to the direction of motion, the work of the magnetic force on each moving charged particle is zero. Therefore speed will remain the same. Magnetic force is always perpendicular to the magnetic field. Reason Electric force is along the direction of the electric field.

Learn more about An electric force here:-https://brainly.com/question/25923373

#SPJ4

The line r has slope 8 and coordinate (0.8).

What is line?

a line is an infinitely long to the object with no width, depth, or curvature. Thus, the  lines are the one of one-dimensional objects, though they may exist on it  two, three, or higher of the  dimension spaces. The word line may also refer to a line are the segment in everyday life, which has two points to denote its ends.

Sol-As per the given question The line r has slope 8 and coordinate (0.8).

The slope of the line r will not change.

And intercept is the addition of their ordinate will be.

Intercept = 5+3

Intercept = 8

So, the line r has slope 8 and coordinate (0.8).

To know more about line click-

https://brainly.com/question/25810637

#SPJ4

Approximately, 37,481.5 Newtons of force was applied to the truck.

A force is a push or pull on an object with mass causes it to change its velocity. Force is an external agent capable of changing a body's state of rest or motion. It has a magnitude and a direction, so it is a vector quantity.

Mathematically, Force = mass x acceleration

but [tex]a=\frac{v-u}{t}[/tex]

so, [tex]F = m\frac{v-u}{t}[/tex]

[tex]F = 6900\frac{47-3}{8.1}[/tex]

F = 6900(5.4)

F = 37,481.5N

In conclusion, the force applied to the freight truck was 37,481.5N.

Learn more about force:https://brainly.com/question/388851

#SPJ1

1. The individual forces cancel each other in case the rider feels the normal sensation of weight which means the net acceleration of the rider is zero cause

mg= W+F

g = a+g

So,

a= 0 which means the rider is not moving.

2. if a rider feels the weight is less than normal then individual forces do not cancel each other but the upper moving force is less than the weight of the rider that's why net acceleration is downward.

The direction of acceleration depends on whether the object is accelerating or decelerating and the direction the object is moving. When an object is accelerated, its acceleration is usually in the same direction as its motion. When an object slows down, its acceleration is in the opposite direction of its motion. The acceleration due to gravity is always constant and downward.

Learn more about The individual forces here:-https://brainly.com/question/25239010

#SPJ4

when forces along the body are transmitted to an adjacent structure, usually the floor or a piece of equipment is called Closed Kinetic chain .

A closed kinetic chain exercise, according to Steindler, occurs when the distal section encounters "substantial" external resistance that prevents unrestricted movement. As a result, neither the proximal nor the distal portions can move in this system.

Unfortunately, Steindler did not provide a numerical value for the word "substantial" in his original definition, which causes misunderstanding and disagreement over what constitutes a true closed kinetic chain movement. Except during isometric exercises, where there is no movement, true closed kinetic chain movement patterns never happen in the extremities.

However, in clinical practise, "resistance is imposed through the distal portion of the extremity and remains fixed to the extremities" is the definition of a closed kinetic chain. The standing squat is the best illustration of this since the feet stay firmly planted and the surface encounters significant resistance from the athlete's bodyweight or additional weight.

Due to its built-in functional stimulation, closed kinetic chain exercises have been used more and more in rehabilitation programmes for more than 20 years.

For more information about closed kinetic chain-

https://brainly.com/question/24231360

To outside observers at rest, the overall sizes of objects traveling at relativistic speeds are smaller.

The mathematical sign for light speed, "c," or relativistic speed, is approximately 186,282 miles per second. As a result, relativistic speed refers to the rate at which such effects are crucial for obtaining the proper level of measurement accuracy for the event under consideration. the discrepancies between values computed using relativity-based theories.

sizes of objects, in general, refers to a thing's size or magnitude. More specifically, the terms "geometrical size" or "spatial size" can be used to describe area, volume, or linear dimensions. Mass can also be used to estimate size, particularly when a range of densities is assumed. A file's actual space on a disc is represented by its sizes of objects. A file's logical and physical dimensions can match.

learn more about relativistic speed here

https://brainly.com/question/15280441

#SPJ4

Answer:

After the spacecraft has passed the planet

Explanation:

Astronomy Test 6

If humans one day encountered aliens, the measurement system we would most likely share with them is the speed of light since it's a universal measurement.

The speed of light in a vacuum, commonly denoted as c, is a universal physical constant that is important in many areas of physics. The speed of light c is exactly equal to 299,792,458 meters per second.

The speed of light is also known as the speed at which light waves propagate through different materials.

Since the speed of light is a universal measurement, humans would most likely share it with aliens if we one day encountered them.

Learn more about the speed of light at: https://brainly.com/question/104425

#SPJ1

The answer is PE = 943j or 943 N*M.

Solution:

Work is measured in joules or newton-meters

It may be thought of as force * distance

If there were acceleration in this problem, the force would be more than the weight, but because the speed is constant force = weight.

so,

Work = Force * Distance

= 2.30m * 410 N

= 943 j or 943 N*M

If you're looking at this from an energy standpoint, you can just consider the final PE as the energy required because there is no KE at the end. so,

PE = m*g*h

and m*g =410N

h = 2.30m

PE = 943j or 943 N*M

Work is done when a force acts in the direction an object is moving. When the weightlifter applies an upward force to lift the barbell, the job is done. The weightlifter holds the barbell above his head, so he's not moving the barbell. While it's true that steady-state aerobic exercise is likely to help with weight loss, experts say it's entirely unnecessary if your primary goal is fat loss.

Learn more about Vertical distance here:- https://brainly.com/question/210650

#SPJ4

The force applied to the second ball is 29.04 N.

The final velocity of the second sphere is calculated as follows;

m₁u₁  +  m₂u₂  =  v(m₁ + m₂)

where;

0.066(4.4) + 0.019(0) = v(0.066 + 0.019)

0.2904 = 0.085v

v = 0.2904/0.085

v = 3.42 m/s

The final momentum of the metal sphere is calculated as follows;

Pf = v(m₁ + m₂)

Pf = 3.42(0.066 + 0.019)

Pf = 0.2904 kgm/s

The force applied to the second ball is calculated as follows;

F = Pf/t

F = (0.2904) / (0.01)

F = 29.04 N

Learn more about applied force here: https://brainly.com/question/14428983

#SPJ1

You have a cart that has a mass of 400 kg and a KE of 500 J, you remove some of the things on the cart to make it lighter. If it is moving at the same speed as before, and the KE is now 125 J, what is the new mass?

kinetic energy : the energy which a body possesses by the virtue of motion

velocity : it is the rate at which a body covers displacement.

The mass of the cart given initially is : 400kg

The kinetic energy given initially is : 500J

now we know the kinetic energy formula : KE = [tex]\frac{1}{2}mv^{2}[/tex]

in the first case lets apply this formula and get the velocity first.

500 = (1/2)x(400)x[tex]v^{2}[/tex]

500x2 = 400x[tex]v^{2}[/tex]

[tex]v^{2}[/tex] = 1000/400

[tex]v^{2}[/tex] = 10/4

therefore [tex]v^{2}[/tex] = 10/4 [tex]m^{2}/s^{2}[/tex]

now that we found the velocity of the body, lets use this to find the new mass.

now in the second case, we have
new kinetic energy : 125J

let the new mass be m.

lets substitute the given info in the formula , we get

125 = (1/2)x(m)x[tex]v^{2}[/tex]

but we know [tex]v^{2}[/tex] = 10/4

so we have,

125 = (1/2)x(m)x(10/4)

125x2 = (10m/4)

150x4 = 10m

60=m

therefore the new mass of the body is 60kg

to know more about Kinetic energy

https://brainly.com/question/22906644

#SPJ1

The sentence can constitute the inequality in the quotient of more than a few and four.2 is less than or identical to 21.

A quotient is a quantity produced by the division of numbers. The quotient has extensive use throughout mathematics and is generally called the integer part of a department, or as a fraction or a ratio.

The range we reap when we divide one quantity via some other is the quotient. as instance, in 8 ÷ 4 = 2; here, the end result of the department is 2, so it's miles the quotient. eight is the dividend and 4 is the divisor.

The quotient of department trouble is determined with the aid of dividing the dividend through the divisor. this can be accomplished thru repeated subtraction or long division. it's far possible to find the quotient of two integers,  fractions, or two algebraic terms.

Learn more about quotient here:-https://brainly.com/question/12558750

#SPJ4

The explosions (supernovae) of first-generation stars creates heavier elements like copper and zinc.

First-generation stars were stars that were formed shortly after the Big Bang. They consisted of primarily hydrogen and helium. Second-generation stars like the Sun contain some heavier elements. The elements couldn't exist just based on nuclear fusion inside stars. Instead, some of the elements must have come from the supernovae of first-generation stars.

The only way heavier elements like oxygen, carbon, and iron can form is by fusion of lighter elements in the cores of stars. Therefore, until the first stars began to form heavier elements, none of those elements existed in the universe.

Learn more about first-generation stars here: https://brainly.com/question/5616342

#SPJ4

Variance is not expressed in the same units as the original data.

The variance of a random variable from its population mean or sample mean is expected in probability theory and statistics. The term "variance" refers to a measurement of how widely apart a group of numbers are from one another. In statistics, variance plays a key role. Descriptive statistics, statistical inference, hypothesis testing, goodness of fit, and Monte Carlo sampling are just a few notions that make use of variance. In the sciences, where data statistical analysis is frequently used, variance is a crucial instrument. The variance, which also refers to the second central moment of a distribution and the covariance between the random variable and itself, is defined as the square of the standard deviation.

Learn more about Variance here:

https://brainly.com/question/13708253

#SPJ4

Human resource planning (HRP) is the system acquisition method that has the advantages of forcing staff to systematically go through every step in a structured process, enforcing quality by maintaining standards, and lowering the probability of missing important issues in collecting user requirements.

HRP is the ongoing practice of strategically planning ahead to make the most use of an organization's most important asset—qualified workers. Planning for human resources helps prevent shortages or surpluses of labor while ensuring the optimal match between

Planning for human resources helps businesses ensure a consistent supply of qualified workers. For this reason, it is also known as workforce planning. Companies use the process to evaluate their needs and make future plans to meet those needs.

Planning for human resources must be adaptable enough to address short-term staffing issues as well as long-term changes in the corporate environment. HRP begins by evaluating and reviewing the current human resource capabilities.

The HRP process is divided into four broad steps: identifying the present employee supply, forecasting the workforce, balancing labor supply and demand, and creating plans that support the company's objectives.

To learn more about Human resource planning here

https://brainly.com/question/20385959

#SPJ4

When a brick is at rest on the inclined plane,it means all forces are balanced on the brick.

so, Gravitational force (mg) will act in component along the iclined are mgsinQ in downwards and mgcosQ in perpendicular,

Therefore frictional force will work in opposit of mgsinQ

it means mg(sinQ) = frictioal force

on the other side we can find force balance perpendicular to the inclined plane as ;

Normal(N) = mg(cosQ)

To move the brick less frictional force is required or we need to increase the force.

so from above equation we can say that,Friction force is grater then the Gravitational force.

To learn more aout friction visit here ; https://brainly.com/question/13000653?referrer=searchResults

#SPJ4

The centripetal acceleration of a speck of clay on the edge is 3.89 m/s².

We need to know about centripetal acceleration to solve this problem. The centripetal acceleration depends on the angular velocity and the radius. It can be written as

a = ώ² . R

where a is centripetal acceleration, ώ is angular velocity and R is radius.

From the question above, the given parameters are

ώ = 45 rpm

d = 35 cm

R = 35/2 = 17.5 cm = 0.175 m

Convert the angular velocity unit to rad/s

ώ = 45 rpm

ώ = 45 x 2π / 60 rad/s

ώ = 1.5π rad/s

By substituting the given parameters, we can calculate the centripetal acceleration

a = ώ² . R

a = 1.5π² . 0.175

a = 3.89 m/s²

Find more on centripetal acceleration at: https://brainly.com/question/22103069

#SPJ4

Given that the boulder's pe value is 4037.6, the energy it possesses immediately before impact must be equal to the energy it had at the time it began. In this manner, the bolder's potential energy

When a particle, object, or collection of particles move, kinetic energy, the energy of motion, is demonstrated. Kinetic energy is the energy that is released when a moving object moves, such as when a person walks, a ball is thrown, food falls off a table, or a particle is charged by an electric field.

Potential energy that has been set into motion by factors like elastic forces or gravity can then be converted into kinetic energy. The power behind motion is called kinetic energy. An object's kinetic energy increases as force is applied to it, which causes it to move faster.

To know more about kinetic energy visit:

https://brainly.com/question/26472013

#SPJ1