a heat engine takes in 6.0 kj from heat and produces waste heat of 4.8 kj. what is its efficiency?
a.25 percent
b.2.50 percent
c.2.00 percent
d.20 percent

Explanation:

Because the temperature and the radiation are not correlated, they're not represented as functions of each other, they're represented as independent variables thus using graph 5 you cannot figure out how one affect another

Answer:

It doesn’t show how temperature and radiation relate to each other. It’s difficult to draw conclusions from data that’s separated this way.

Answer:

u can use a calculator to answer that question thats ur only hint

Explanation:

Answer:

O Intense rain or an earthquake

Explanation:

Landslides can be initiated in slopes already on the verge of movement by rainfall, snowmelt, changes in water level, stream erosion, changes in ground water, earthquakes, volcanic activity, disturbance by human activities, or any combination of these factors.

Intense rain or an earthquake can trigger a landslide.

In conclusion, intense rain or an earthquake can trigger a landslide.

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We now discuss an analysis of translational motion of objects in terms of the quantities position and velocity.

Displacement refers to the distance between the initial and final position of an object, including direction. Velocity, on the other hand, refers to the rate of change of displacement over time, including direction. These two quantities are fundamental in describing the motion of objects in space, and their understanding is crucial in a wide range of applications, from physics to engineering.

By analyzing the displacement and velocity of an object, we can determine important properties such as acceleration, momentum, and energy, and gain a better understanding of the physical behavior of the system in question.

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✍ We can this formula:

\(\huge {\boxed {\sf v = g \cdot t }}\)

\(\huge {\text {$ \sf v = 9,8 \cdot 2,5 \Longrightarrow \boxed {\boxed {\bf v= 24,5 }} $ }}\)

Ahmad's average speed on his way to his friend's house is 60 miles per hour, while on the return trip, it is 50 miles per hour. The total time for the round trip is 11 hours.

Let's assume the distance between Ahmad's house and his friend's house is D miles. To find the distance, we can use the formula: Distance = Speed × Time.

On the way to his friend's house, Ahmad travels at an average speed of 60 miles per hour. Let's denote the time taken for this leg of the trip as T1. Using the formula, we have D = 60 × T1.

On the return trip, Ahmad travels at an average speed of 50 miles per hour. The time taken for this leg of the trip can be denoted as T2. Using the formula, we have D = 50 × T2.

According to the problem, the total driving time for the round trip is 11 hours. This can be expressed as T1 + T2 = 11.

Now, we have a system of two equations:

D = 60T1

D = 50T2

T1 + T2 = 11

To solve this system, we can use substitution or elimination. Let's use substitution. From the first equation, we can express T1 in terms of D: T1 = D/60. Substituting this into the third equation, we get D/60 + T2 = 11. Rearranging the equation, we have T2 = 11 - D/60.

Now, substitute the expression for T2 in the second equation: D = 50(11 - D/60).

Simplifying the equation, we have D = 550 - 5D/6.

Multiply both sides by 6 to eliminate the fraction: 6D = 3300 - 5D.

Add 5D to both sides: 11D = 3300.

Divide both sides by 11: D = 300.

Therefore, the distance between Ahmad's house and his friend's house is 300 miles.

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The long-term stability of the solar system in the presence of weak perturbations from stellar flybys is a fascinating topic in astrodynamics.

While the solar system is generally stable, encounters with other stars can cause small perturbations that affect the orbits of planets.

However, these perturbations are usually weak and do not significantly alter the overall stability of the system.

The gravitational influence of passing stars can cause slight changes in the orbital parameters of planets, such as eccentricity and inclination.

These changes accumulate over time, leading to long-term variations in the orbits. However, the effects are generally small and unlikely to cause major disruptions.

For example, if a star passes near the solar system, it can induce periodic variations in the orbital elements of outer planets, like Jupiter and Saturn.

These variations are known as secular resonances and can lead to small changes in the planets' orbits over millions of years.

Overall, while stellar flybys can introduce weak perturbations to the solar system, the system's long-term stability is robust. The planets' orbits remain relatively stable, and the overall structure of the solar system is not significantly affected.

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Answer:

Since the two colliding objects travel together in the same direction after the collision, the total momentum is simply the total mass of the objects multiplied by their velocity.

Explanation:

Answer:

60.18 N

Explanation:

Given that:

The force applied on the sled = 100 N

Suppose, the angle between the sled rope and the ground = 53°

The horizontal force which acts  in the horizontal direction can be expressed as:

\(F_x = F \ cos \theta\)

\(F_x = 100 \ cos (53)\)

\(F_x = 60.18 \ N\)

But if the angle between the sled rope is parallel to the ground. Then, we use an angle on a straight line which is = 180°

\(F_x = F \ cos \theta\)

\(F_x = 100 \ cos (180)\)

= 100 × -1

= -100 N

Answer:

When a magnet causes a paper clip to move, it's an example of Potential energy being changed in to Kinetic energy

A child running is an example of Kinetic energy

A motionless iron object in the magnetic field of a magnet may be said to have Potential energy

Chemical potential energy is decreased, electric energy is increased and thermal energy is increased. All the above is correct.

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Answer:

i think the answer is about 50 m/s

When is the average velocity of an object equal to the instantaneous velocity is C. This is the case only when the velocity is constant.

The instantaneous velocity of an object is equal to the average velocity of an object when the velocity is constant or when the acceleration is zero, this is the case only when the velocity is constant. When an object has a constant velocity, the instantaneous velocity of the object is equivalent to the average velocity of the object. This is true because the velocity of the object remains constant over time.

For example, if an object travels at a speed of 20 meters per second for a time period of 5 seconds, then the instantaneous velocity at the end of the 5 seconds is 20 meters per second, and the average velocity of the object over the 5 seconds is also 20 meters per second. This is because the velocity remained constant throughout the entire time period. Therefore, option c is correct, this is the case only when the velocity is constant.

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Answer:

every particle attracts every other particle in the universe with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

Explanation:

Answer: Newton's law of gravitation, states that any particle of matter in the universe attracts any other with a force varying directly as the product of the masses and inversely as the square of the distance between them

Explanation: More of a simple answer is a law stating that any two masses attract each other with a force equal to a constant (called the gravitational constant) multiplied by the product of the two masses and divided by the square of the distance between them.

ANSWER:

0.4081%

Explanation:

Difference=24.6-24.5=0.1

Relative error = 0.1/24.5*100=0.4081%

Relative error is equal to the = difference between both the values/The true value *100

The overall charge on the tetrachloridocuprate(II) ion is 2-.

The tetrachloridocuprate(II) ion, also known as CuCl4^2-, consists of a central copper atom (Cu) coordinated to four chloride ions (Cl-) in a tetrahedral arrangement. Each chloride ion carries a charge of -1, resulting in a total negative charge of -4 contributed by the chloride ligands. Since the overall charge of the tetrachloridocuprate(II) ion is 2-, it means the copper ion must have a charge of +2 to balance the negative charges from the chloride ions. This indicates that the copper ion has lost two electrons to achieve stability and form the complex ion.

Complex ions: Complex ions are formed when a central metal atom or ion is surrounded by ligands, which are usually ions or molecules that donate electrons to the metal. The overall charge on a complex ion is determined by balancing the charges of the ligands with the charge of the central metal atom or ion.

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The velocity of the earthworm when it crawled 35 millimeter over a time of 2.5 seconds is 0.014 m/s.

Velocity can be defined as the ratio of displacement to time of a body.

To calculate the earthworm's velocity, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the earthworm's velocity is 0.014 m/s.

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Answer:

true

Explanation:

have a great day........

Answer:

Explanation: We need to find the potential energy of a 2000kg mass that is raised 5.0m above the ground.

Potential energy:

Therefore the potential energy would be:

Answer:

200J

Explanation:

Given parameters:

Mass of sledgehammer  = 6kg

Distance  = 2m

Force applied  = 100N

Unknown:

Work done = ?

Solution:

Workdone is the force applied to move a body through a certain distance;

   Work done  = Force x distance

 Work done  = 100 x 2 = 200J

An electric pencil sharpener is a small motorized appliance for sharpening or refreshing the points on lead pencils.

An electric pencil sharpener is a small motorized equipment for polishing or fresh the factors on lead pencils. Within the hollow, a small electric powered motor turns a blade meeting at high velocity. The blades shave wooden and lead from the pencil's cease, bringing it to some extent.

The old-fashioned pencil sharpeners which are established to the wall and cranked through a manage are an instance of a compound system that is composed  simple machines: the wheel and axle and a wedge.

You could sharpen colored pencils in an electric sharpener, however make certain to be very mild with your pencils and often easy your sharpener to put off any wax increase. If performed improperly, sharpening your colored pencils in an electric sharpener can harm each your pencils and your sharpener.

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Astronomers expected that the expansion of the universe might slow down due to Option a. the gravitational pull of all the matter in it.

Astronomers initially expected that the gravitational pull of all the matter in the universe would cause the expansion of the universe to slow down. This is because the gravitational force of matter pulls objects towards each other, and thus would be expected to slow down the expansion of the universe. However, later observations showed that the expansion of the universe was actually accelerating, rather than slowing down.

To account for this unexpected acceleration, astronomers introduced the concept of dark energy, which is a mysterious force that is thought to be causing the acceleration of the universe's expansion. Dark energy is believed to be a property of space itself, and it is thought to make up about 68% of the total energy density of the universe. The nature of dark energy is still not well understood, and it remains one of the biggest mysteries in modern physics.

In summary, while astronomers initially expected that the gravitational pull of matter in the universe would cause the expansion of the universe to slow down, later observations showed that the expansion is actually accelerating due to the mysterious force of dark energy. Therefore, Option A is Correct.

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The wire stretches by 0.03 inches when a load of 440 lb acts on the pipe.

The diameter of wire =0.25 inches,

then radius will be = 0.25/2

⇒ 0.125 in.

The area (A) of a circle is given by

A = π × (radius)²

= π × (0.125)² (where  π =3.14)

= 3.14 × 0.015

⇒ 0.049 square inches.

The Stress (σ) in the wire is given by

σ = P / A

P = 600 lb

A = 0.0491 square inches

σ = 600 lb / 0.0491²

⇒ 12220 psi

The modulus of elasticity (E) for A-36 steel = 29,000,000 psi.

Strain (ε) is given by ε = σ / E,

where,

σ = stress

= 12220 psi

E = modulus of elasticity for A-36 steel

=29,000,000 psi.

ε = 12220 psi / 29,000,000 psi

⇒ 0.000421.

the stretch  (ΔL) in the wire is given by

ΔL = ε × L,

ε = 0.000421

L = 72 inches

ΔL = 0.000421 ×72 inches

⇒ 0.03 inches.

Therefore, when a load of 600 lb acts on the pipe, the wire with a diameter of 0.25 inches will stretch by approximately 0.0303 inches.

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The question is -

The rigid pipe is supported by a pin at A and an A-36 steel guy wire BD. If the wire has a diameter of 0.25 in., determine how much it stretches when a load of P = 600 lb acts on the pipe.

When we apply pressure on the one side of balloon the other side bulges out due to the movement of gas to other side.

If we press one side of the balloon, the other side bulges out because the gas that present on one side moves to the other side where there is no pressure. The body of balloon is elastic so when we apply pressure the other side bulges out.

So we can conclude that when we apply pressure on the one side of balloon the other side bulges out due to the movement of gas to other side.

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Answer:

895522 times faster.

Explanation:

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

Speed of sound in air (v) = 335 m/s

Speed of light in air (c) = 3×10⁸ m/s

How many times faster =.?

To obtain how many times faster light travels in air than sound, do the following

c : v => 3×10⁸ : 335

c/v = 3×10⁸ / 335

c/v = 895522

Cross multiply

c = 895522 × v

From the illustrations made above, we can see that the speed of the light in air (c) is 895522 times the speed of sound in air.

Thus, light travels 895522 times faster than sound in air.

Answer:

TRUMP KILLED 223,000 PEOPLE AND HE STILL DOES NOT CARE! HE SAYS WE ARE ROUNDING THE CORNER. HE CAN NOT EVEN HAND OUT STIMULUS TO DYING BUISNESSES AND AIRLINES!

Explanation:

TRUMP KILLED 223,000 PEOPLE AND HE STILL DOES NOT CARE! HE SAYS WE ARE ROUNDING THE CORNER. HE CAN NOT EVEN HAND OUT STIMULUS TO DYING BUISNESSES AND AIRLINES!

Answer:

hello the diagram related to this question is missing attached below is the missing diagram

Answer :

The magnitude of the electric field = 4KQ / L^2

direction = 45° east to south

Explanation:

The magnitude of the electric field = 4KQ / L^2

direction = 45° east to south

Answer:That only applies to highly polished surfaces, eg mirrors.

If you take a high quality laser (ie with low divergence) and aim it at a wall, you can see the spot where the laser beam reaches the wall from anywhere with a direct line-of-sight to the spot where the laser beam reaches the wall. This due to micro imperfections on the surface of the wall. At a microscopic level, the wall surface is very rough and pointing in all directions.

As to why, a beam of light bounces of a highly polished surface, I can only surmise that it is essentially due to kinematics, ie the only force opposing the light beam is normal to the surface, hence there no forces along the reflective surface. Since there are no forces along the reflective surface, the speed component of light along the reflective surface remains unchanged. However, on the plane perpendicular to the reflective surface the, the light photons bounce off at the same speed at which the hit the reflective surface because the mass of the reflective surface is much much much larger than the mass of the photons, which means that the reflective surface won’t move at all. Since conservation of momentum requires that momentum after the collision be the same as the momentum before the collision then the only way for that to happen is if the velocity of the photon perpendicular to the reflective surface is of exactly the same magnitude but in the opposite direction. Vector resolution of the speed component of the reflected beam means that the angle of reflection must be the same as the angle of incidence.

Explanation:

Therefore, Weber is the unit of magnetic flux. Magnetic flux density (B) is measured in tesla (T). option 1

The SI unit for magnetic flux is Weber. Magnetic flux is a measure of the amount of magnetic field passing through a given area. It is expressed in Weber (Wb) which is the SI unit of magnetic flux.

The magnetic flux passing through a surface is given by the formula

ϕ = B.A

where B is the magnetic field and A is the area of the surface.

A magnetic field of one Tesla (1 T) passing through an area of 1 m2 perpendicular to it produces a flux of 1 Wb.

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