An ideal heat engine absorbs 94.5 kj of heat and exhausts 78.8 kj of heat in each cycle. what is the efficiency of the engine?

The term you are looking for is "chemical battery". Chemical batteries work by converting chemical energy into electrical energy through a series of chemical reactions. These reactions take place within the battery's cells, which are composed of two electrodes and an electrolyte.

When the battery is connected to a circuit, the chemical reactions produce an electrical current that can be used to power devices. Chemical batteries are widely used in many applications, including consumer electronics, electric vehicles, and renewable energy systems. They are a crucial component of our modern technological society, and ongoing research is focused on developing more efficient and sustainable battery technologies to meet growing energy demands.

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I am stationary in a reference system but if my reference system is not an inertial reference system, then, relative to me, a system that is an inertial reference system must:

Option (b). move with constant velocity.

In an inertial reference system, objects either remain at rest or move with a constant velocity in a straight line. Since you are stationary in your non-inertial reference system, a system that is inertial would appear to move with a constant velocity relative to you.

An inertial reference system is a frame of reference in which a body remains at rest or moves with constant velocity unless acted upon by a force. In contrast, a non-inertial reference system is a frame of reference in which a body may appear to move even when no external forces are acting upon it due to the presence of fictitious forces.

Therefore, relative to an observer in a non-inertial reference system, an inertial reference system must move with constant velocity to be free from fictitious force.

Therefore Option (b) is correct.

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--The given question is incomplete, the complete question is:

"I am stationary in a reference system but if my reference system is not an inertial reference system, then, relative to me, a system that is an inertial reference system must:

a. remain at rest.

b. move with constant velocity.

c. be accelerating.

d. be none of the above."--

The moment about a of the force exerted by the cable at b if the tension in the cable is 406 Ib is (2400j + 1440k) Ib -ft.

Write the coordinates of each point as follows:

A = (0i,0j,0k)

B= (12i,0j, 0k)

C = (0i, 4.8j,-8k)

Calculate the position vector of B with respect to A.

rAB= B - A

rAB =(12i,0j, 0k ) - ( 0i,0j,0k)

=(12i)ft

Calculate the position vector of cable C with respect to B.

rBC=C - B

rBC = (0i, 4.8j,-8k) - (12i,0j, 0k)

= (-12i+4.8j -8k) ft

Calculate the magnitude of BC.

IBCl = √(-12)^2 + (4.8)^2 +(-8)^2

=15.2 ft

Calculate the unit vector of C with respect to C.

unit vector of C with respect to C (Ucc) = rBC / IBCl

=(-12i+4.8j -8k) / 15.2

Represent the force BC in vector from.

TBC= TBC (Ucc)

TBC= (380 (-12i+4.8j -8k) )/ 15.2 lb

Calculate the moment about A.

MA = rAB x TBC

MA = (12i) x (380 (-12i+4.8j -8k) / 15.2

= (300i) x (-12i + 4.8j - 8k )

= 1440k - (-2400j)

MA= (2400j + 1440k ) lb -ft

Therefore, The moment about a of the force exerted by the cable at b = (2400j + 1440k) Ib -ft.

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Answer:

270 s or 4.5 min

Explanation:

First find the amount of heat needed:

q = mCΔT

q = (1.5 kg) (4200 J/kg/K) (100 − 15) K

q = 535,500 J

q = 535.5 kJ

Power is energy per time.

P = E / t

2 kW = 535.5 kJ / t

t = 270 s

Answer:

ANSWER IS A CONVECTION

B CONDUCTION

Point A heat transfer as steam is type of a convection heat transfer

Point B a source is the type of conduction heat transfer

Conduction = It is a process of heat transfer in which energy is transferred between successive molecules For example If we put the one end of the spoon to the boiling water then other end also become hot due to conduction.

Convection = It is type of heat transfer in which the heat flows due to movement of molecules or convection currents. convection heat transfer takes place in water and gases.

Just like this at point B the heat is transferred from one molecule to other which is conduction.

And point A heat transferred from steam which is convection as explained in above definition.

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Since Alejandro hopes to combine the findings from the collected studies and draw a general conclusion regarding the subject, he is using statistical tool of inference.

There are basically 2 types of statistical tools:

Descriptive tools are used to describe data. They include the use of tables, graphs, measures of dispersion, measures of central tendencies, etc.

Inferential tools are used to deduce conclusions from data. They include measures of significant differences, probability, correlation and regression, etc.

In this case, Alejandro would need to subject the data collected from the 35 studies to inferential statistical analysis tools in order to be able to make relevant conclusions.

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Genetic variation can be bad or good to an organism . If it affects positively then, the organism can have more adaptable features to survive in the environment. For those in which worse genetic variations are happens cannot survive and will given out the way to the fittest to live.

Genes are the basic hereditary material in living things. Genes from the parent are inherited to their offsprings. Genes undergo variations or mutations by some internal factors. These can produce both good and bad results.

The given passage can be completed as follows:

Natural selection is defined as a process in which organisms that do will in an environment pass their genes on next generation. Over time, these genes can become more common in a population.

However, natural selection doesn't work in all situations. It works only when there are variations within the population. Some individual are more suited to the environment. This means that they are  better able to survive or reproduce. There must be variations in the genes.

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Answer:

110 grams

Explanation:

The given chemical equation is

\(4Fe+3O_2\rightarrow 2Fe_2O_3\)

\(\Rightarrow 2Fe+1.5O_2\rightarrow Fe_2O_3\)

2 moles of Iron, Fe, react with 1.5 moles of oxygen, \(O_2\), to produce 1 mole of rust.

Or, 2x56=112 grams of Iron, Fe, reacts with 1.5x32=48 grams of oxygen, \(O_2\), to produce 112+48=160 grams of rust.

[As the mass of 1 mole of Fe is 56g and the mass of 1 mole of \(O_2\) is 32g]

The given mass of Iron, Fe, is 100 g.

The given mass of the oxygen, \(O_2\) is 33 g.

Since 48 grams of oxygen required 112 grams of iron to react completely.

So, 1 gram of oxygen required 112/48 grams of iron to react completely.

So, 33 grams of oxygen required (112/48)x33=77 grams of iron to react completely.

Here, the availability of oxygen is less, so, the oxygen in the limiting agent.

So, the 33g of oxygen (reactant) will react with 77 g of iron (reactant) to produce 33+77=110 g of rust (product) as by the law of conservation of mass the mass of the product is the sum of masses of all the reactant. The remaining iron will remains be unreacted.

The ball will travel 40 m, which is an option (D).

We can use the range formula to determine how far the football will travel:

\(R = (v^2 / g) * sin(2 \theta)\)

where R is the range, v is the initial velocity, g is the acceleration due to gravity, and θ is the angle of launch.

Substituting the given values, we get:

\(R = (20 m/s)^2 / (2 * 9.81 m/s^2) * sin(2*30^o)\)

R = 40 m / (2 * 0.5)

R = 40 m / 1

R = 40 m

Rounded to the nearest 5m, the ball will travel 40 m, which is an option (D).

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Answer:

i) Power = Force * Velocity = 1100 * 15 = 16500 W = 16.5 kW(ii)  Find the value of k first: F = 400 + k(15^2)                                              k = 28/9    F = 400 +(28/9)(30^2) = 320

Explanation:

1. Force  necessary to stretch an ideal spring with a spring constant of 125 N/m by 35 cm is 437.5 N.

2. The mass of a fish that would stretch the spring by 7.55 cm from its normal length is 5.10 kg.

3. Spring constant is 267.94 N/m.

4. Spring constant is 285.71 N/m.

5. Distance will be 0.115 m.

6. Distance will be 1.986 m.

7. Spring constant is calculated to be 183.38 N/m.

8. Original length becomes 80 cm.

9. Distance covers to be 0.1924 m.

10. Equivalent spring constant becomes 150 N/m

1. The force necessary to stretch the spring can be calculated using Hooke's law, which states that F = kx, where F is the force applied, k is the spring constant, and x is the displacement from the equilibrium position.

Thus, F = kx

F = (125 N/m)(0.35 m)

F = 43.75 N.

2. Using Hooke's law again, we have

F = kx

F = (650 N/m)(0.0755 m)

F = 49.98 N.

This force is equal to the weight of the fish, so we can find its mass by dividing by the acceleration due to gravity:

m = F/g

m = 5.10 kg.

3. We can use Hooke's law once more to find the spring constant:

k = F/x

k = (43 kg)(9.81 m/s²)/(0.16 m)

k = 267.94 N/m.

4. Hooke's law gives us k = F/x

k = (80 N)/(0.28 m)

k = 285.71 N/m.

5. We can use Hooke's law to set up a proportion: F1/x1 = F2/x2, where F1 and x1 are the initial force and displacement, and F2 and x2 are the new force and displacement. Solving for x2, we get

x2 = (F2/F1)x1

x2 = (23 N/16 N)(0.08 m)

x2 = 0.115 m.

6. Hooke's law gives us F = kx = (36 N/cm)(0.073 m) = 2.628 N. This is the force required to stretch the spring by 1 cm, so the total displacement is

x = (7.3 kg)(9.81 m/s²)/(36 N/cm)

= 1.986 m.

7. We can use Hooke's law to set up an equation: mg = kx, where m is the mass, g is the acceleration due to gravity, and x is the displacement from the equilibrium position. Solving for k, we get

k = mg/x

k = (15 kg)(9.81 m/s²)/(0.80 m)

k = 183.38 N/m.

8. The original length of the cord is simply the length when no mass is attached, so it is 80 cm.

9. The total force on the bottom spring is the sum of the weights of the two springs and the mass, so

F = (0.58 kg)(9.81 m/s²) + (50 N/m + 100 N/m)(x), where x is the displacement of the two springs together. Using Hooke's law, we can write this as F = 19.24 N + 150 x.

Setting this equal to kx and solving for x, we get

x = F/(k1 + k2)

x = (19.24 N)/(50 N/m + 100 N/m)

x = 0.1924 m.

10. The spring constant of the system of springs is simply the sum of the individual spring constants, so

k = k1 + k2

k = 50 N/m + 100 N/m

k = 150 N/m.

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The cornering performance of an automobile is evaluated on a skid pad, where the maximum speed a car can maintain around a circular path on a dry, flat surface is measured. the maximum lateral acceleration of the Dodge Viper GTS-R on the skid pad is approximately 9.54 m/s^2.

To calculate the maximum lateral acceleration of the Dodge Viper GTS-R, we need to convert the speed from km/h to m/s and then use the formula for centripetal acceleration:

a = v^2 / r

where:

a = centripetal acceleration

v = velocity (in m/s)

r = radius of the circular path

First, let's convert the speed from km/h to m/s:

139 km/h = (139 * 1000) / 3600 = 38.61 m/s

Now we can calculate the centripetal acceleration:

a = (38.61)^2 / 156

Calculating this value gives:

a ≈ 9.54 m/s^2

Therefore, the maximum lateral acceleration of the Dodge Viper GTS-R on the skid pad is approximately 9.54 m/s^2.

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Answer:

\(v_f=9,07~m/s\)

Explanation:

Constant Acceleration Motion

It's a type of motion in which the velocity of an object changes uniformly in time.

Being a the constant acceleration, vo the initial speed, vf the final speed, and t the time, the following relation applies:

\(v_f=v_o+at\)

The car initially travels at vo=7.35 m/s and accelerates at a rate of \(a=0.824~m/s^2\) during t=2.09 s.

The final velocity is:

\(v_f=7.35+0.824*2.09\)

\(\mathbf{v_f=9,07~m/s}\)

let us break down the options given.

Option A suggests continuing with the assigned course and querying ATC. This is a good option, especially if there is uncertainty about whether or not clearance will be given. It is important to always follow ATC instructions and remain in communication with them.

Option B suggests turning outbound and completing the procedure turn. This may be a viable option if there is enough distance to complete the turn and return to the localizer course before crossing it. However, it is important to consider the timing of this turn and to ensure that it will not interfere with other aircraft in the vicinity.

Option C suggests turning inbound and joining the final approach course. This may be the best option if clearance for the approach is imminent. However, it is important to ensure that the aircraft is properly configured for the approach and that the necessary approach procedures are followed.

In conclusion, the best course of action may depend on the specific situation and factors such as timing and proximity to other aircraft. It is important to stay alert and communicate with ATC to ensure a safe and successful approach.

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Answer:

just awnsered this one your awnser is the the second option

Answer:

answer one

Explanation:

ANSWER

False.

EXPLANATION

In radioactive decay (or nuclei decay), an unstable nucleus emits radiation into a nucleus that is table and has less energy and a lower mass.

Therefore, nuclei decay from a less stable form to a more stable form.

The answer is false.

Answer:

m = 369 grams

Explanation:

Given that,

The density of backpack, d = 30 g/mL

The volume of the backpack, V = 12.3 cm³

We need to find the mass of the backpack. The density of an object is given by :

\(d=\dfrac{m}{V}\\\\m=d\times V\\\\m=30\times 12.3\\\\m=369\ g\)

So, the mass of the backpack is 369 grams.

The primary effect of increasing the surface tension of the liquid is to increase the capillary force. Capillary forces arise due to the combined effects of adhesion and cohesion

When the surface tension of the liquid increases, the capillary rise will increase. It is because the increase in surface tension leads to an increase in the force that pulls the liquid upwards in a tube. is as follows;If you place a capillary tube in a beaker filled with water, the water surface inside the tube rises slightly higher than the level outside the tube.

This rise in water level is called capillary rise. The capillary rise is caused by the attraction between the molecules of the water and the molecules of the glass tube.This attraction is called capillary force or capillary action. The capillary force is due to the combined effect of adhesive and cohesive forces. The adhesive force is the attraction between the molecules of the liquid and the molecules of the solid surface, while the cohesive force is the attraction between the molecules of the liquid.

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Answer:

O Atoms in gas can move freely

Explanation:

Depends on where it is going please follow me

Answer:

its option C

Explanation:

just took it

Answer:

40 m

Explanation:

The area under v-t graph gives the distance travelled by the particle.

Distance = area of ΔOBC + area of ΔCDE + area of ΔEFG

\(=\dfrac{1}{2}\times 4\times 10+\dfrac{1}{2}\times 2\times 10+\dfrac{1}{2}\times 4\times 5\\\\=40\ m\)

So, the distance travelled by the particle in the time interval t = 0 and t= 10 s is equal to 40 m.

Answer:

Answer is radiant and chemical.

Hope this help:)

Sry if wrong

The backward finite difference method for estimating the derivative at x=0.5 is:

(f(0.5) - f(0.25)) / (0.5 - 0.25) = (-0.14 - (-0.4025)) / (0.5 - 0.25) = 0.2625 / 0.25 = 10.5

The percent error between this estimate and the true value is:

|(10.5 - (-0.9125)) / (-0.9125)| * 100% = |11.4125 / (-0.9125)| * 100% = 12.48%

The forward finite difference method for estimating the derivative at x=0.5 is:

(f(0.75) - f(0.5)) / (0.75 - 0.5) = (-0.6275 - (-0.14)) / (0.75 - 0.5) = -0.4875 / 0.25 = -1.95

The percent error between this estimate and the true value is:

|(-1.95 - (-0.9125)) / (-0.9125)| * 100% = |-1.0375 / (-0.9125)| * 100% = 1.14%

The centred finite difference method for estimating the derivative at x=0.5 is:

(f(0.75) - f(0.25)) / (0.75 - 0.25) = (-0.6275 - (-0.4025)) / (0.75 - 0.25) = -0.225 / 0.5 = -0.45

The percent error between this estimate and the true value is:

|(-0.45 - (-0.9125)) / (-0.9125)| * 100% = |0.4625 / (-0.9125)| * 100% = 0.51%

To get the same percent error as the centred finite difference, we would have to use a step size of ∆ = 0.125.

This is because a smaller step size means a smaller difference between the estimates and the true value, and therefore a smaller percent error.

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The standard volume of hydrogen peroxide used with permanent hair color is typically 20 volume (6%).

The standard volume of hydrogen peroxide used with permanent hair color is typically 20 volume (6%). It is important to note that different hair color brands or formulations may offer different volumes of hydrogen peroxide options, so it is always advisable to refer to the specific instructions and recommendations provided by the hair color manufacturer.

The percentage value, in this case, 6%, indicates the weight of hydrogen peroxide present in the formulation. In a 20 volume hydrogen peroxide solution, 6% of the total weight is hydrogen peroxide, while the remaining 94% consists of other components, such as water, stabilizers, and conditioners.

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The correct answer is B. According to Newton's law of universal gravitation, the gravitational force between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

In simpler terms, as objects get closer together, the gravitational force between them increases.

When the distance between two objects decreases, the denominator of the equation (distance squared) becomes smaller, resulting in a larger force. Conversely, when the distance increases, the denominator becomes larger, resulting in a smaller force.

It is important to note that the mass of an object does not directly affect the strength of the gravitational force between two objects. However, a higher mass will lead to a greater gravitational force when compared to a lower mass, but only because the force is being exerted on a more massive object. The mass of an individual object doesn't directly affect the gravitational force it experiences from another object. option B

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The rotational equivalent of linear momentum, angular momentum, is also known as Rotational Momentum or Moment of Momentum.

Angular momentum is the rotational equivalent of linear momentum in physics. It is an important physical quantity because it is a conserved quantity—in a closed system, the total angular momentum remains constant. Both the direction and magnitude of angular momentum are conserved. The property of any rotating object given by moment of inertia times angular velocity is defined as angular momentum. It is the property of a rotating body determined by the product of the rotating object's moment of inertia and angular velocity. Angular Momentum is defined as the property of any rotating object given by the product of the rotating object's moment of inertia and angular velocity. It is a vector with both magnitude and direction.

Here,

Angular momentum, which is the rotational equivalent of linear momentum, is also known as Rotational Momentum or Moment of Momentum.

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Answer:

I think it is D

Explanation:

Answer:

D :D lol

Explanation:

Answer:

Explanation:

We are given the following the following

Initial speed u = 0.5m/s

initial distance S1 = 15cm = 0.15m

Final distance = 0m

Required

Final speed v

Using the equation of motion;

v² = u²+2gS

v² = 0.5²+2(9.8)(0.15)

v² = 0.25+2.94

v² = 3.19

v = √3.19

v = 1.786m/s

Hence  its speed when it reaches the bottom is 1.786m/s

Inelastic collision and a host of other factors causes the loss of energy.

Kinetic energy of an object is the energy that it possesses due to motion.

It can be defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. When it has gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes.

In an inelastic collision which is the case of ball X and Y, the kinetic energy of the system is not conserved. The energy that you find lost has been dissipated as other forms of energy. This can be heat, friction, vibrational energy transferred to atoms of the colliding particles, energy lost to deform the atomic structure etc.

In conclusion, the inelastic collision nature of the two balls results in the loss of energy through different forms.

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D. Must be implemented using a computer.

It is possible to make scientific models without computers and/or other technology.

Answer:

D.

Explanation:

thnks mark me brainliest

In order to keep the knot from moving, you must pull on the third rope in the direction of the loop closest to the end of the rope.

Here, correct answer will be

This will tighten the knot and secure the rope in place. As the rope is pulled, the loop that is closest to the end of the rope should be gradually tightened.

This is because the tension on the rope will ensure the knot remains in place, preventing any unwanted movement.

Pulling on the third rope in the direction of the loop closest to the end of the rope will ensure the knot remains secure and does not move.

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