Which of the following describes the work done by a heat engine?
A. Qin - Qout
B. Qin - W
C. Qout - Qin D. Qin + Qout

Answer:

This downward force and acceleration results in a downward displacement from the position that the object would be if there were no gravity. The force of gravity does not affect the horizontal component of motion; a projectile maintains a constant horizontal velocity since there are no horizontal forces acting upon it

A boat bobbing on the water waves is an example of b. longitudinal wave

Any wave in which the medium's particles vibrate in the same direction as the wave itself is said to be longitudinal.

When it comes to water waves, the water's atoms flow up and down in the same direction as the wave.

The boat is actually riding on a sequence of longitudinal waves in the water as it travels up and down on the waves.

The longitudinal oscillation of the water particles, which results from the wind's energy being transferred to the water, produces the waves.

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Shenna has recorded the property of cleavage. Cleavage refers to the tendency of a mineral to break along flat, smooth planes due to its internal structure.structure.So,The correct option would be (A) Cleavage.

Cleavage is a property that describes how a mineral breaks along planes of weakness, resulting in smooth, flat surfaces. It is one of the key characteristics used to identify and classify minerals.

In the given observations, Shenna noted that the mineral sample called "Mica" breaks into thin sheets. This characteristic indicates that Mica exhibits cleavage. When Mica is subjected to stress or force, it breaks along flat planes, resulting in thin, sheet-like fragments.

On the other hand, Shenna described the mineral sample called "Pyrite" as having cubic crystals. While this information is valuable for identifying Pyrite, it does not pertain directly to the property of cleavage.

Shenna has recorded the property of cleavage based on his observation that the mineral sample called "Mica" breaks into thin sheets.sheets.Hence the correct answer is Cleavage. Cleavage refers to the tendency of a mineral to break along flat, smooth planes due to its internal structure.

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The rate of heat loss through a window covered with a 0.750 mm-thick layer of paper (thermal conductivity 0.0500 W/m⋅K) can be calculated using the formula:

q = kA (T1 - T2)/d

where q is the rate of heat loss, k is the thermal conductivity of paper (0.0500 W/m⋅K), A is the area of the window, T1 is the temperature inside the room, T2 is the temperature outside, and d is the thickness of paper (0.750 mm).

Assuming that the temperature inside the room is 20°C and outside temperature is 5°C, and that the area of the window is 1 m², we can calculate:

q = (0.0500 W/Mrk) × (1 m²) × (20°C - 5°C) / (0.750 mm)

q = 6.67 W

Therefore, if you cover your window with a 0.750 mm-thick layer of paper with thermal conductivity of 0.0500 W/m⋅K, you can expect to lose heat at a rate of approximately 6.67 W.

The air directly above is warmed by the ground, which is warmed by the Sun. Warm air near the surface enlarges and loses density relative to the ambient air. The lighter air expands at the reduced pressure at higher altitudes, which causes it to climb and cool. When it cools to the same temperature as the surrounding air and reaches that density, it stops rising.

A thermal is connected to a downward flow that surrounds the thermal column. At the top of the thermal, colder air is ejected, which causes the outside to move downward. The troposphere's (lower atmosphere's) characteristics have an impact on the size and power of thermals.

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Answer: the thermometer will not display the original temperature of the substance before the thermometer was introduced, the measured temperature will be skewed a little depending on the

A system containing 1 atm of an ideal gas is doubled in temperature and halved in volume , the new pressure is 4 atm.

The gas law  equation is as follows :

P₁ V₁ / T₁ = P₂ V₂ / T₂

Where

The initial pressure , P₁ = 1 atm

The initial volume , V₁ = V₁

the initial temperature = T₁

The final pressure P₂ = ?

The final volume , V₂ = V₁/ 2

The final temperature , T₂ = 2T₁

P₁ V₁ / T₁  =  (P₂ V₁/ 2 ) / 2T₁

P₂  = 4 atm

Thus, the new pressure is 4 atm.

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To determine the mass of the roller coaster, we can use the equation that relates potential energy (PE), mass (m), and height (h) given by:

PE = mgh

where g is the acceleration due to gravity, approximately 9.8 m/s².

Given:

Potential energy (PE) = 235,200 J

Height (h) = 30 m

Acceleration due to gravity (g) = 9.8 m/s²

Substituting the values into the equation, we have:

235,200 J = m * 9.8 m/s² * 30 m

To solve for the mass (m), we rearrange the equation:

m = 235,200 J / (9.8 m/s² * 30 m)

m ≈ 800 kg

Therefore, the mass of the roller coaster is approximately 800 kg.

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The correct option is option (c): In Atrial Tachycardia, the P waves are commonly seen as irregular or have a sawtooth pattern.

Atrial Tachycardia is a condition characterized by a rapid heart rate originating from abnormal electrical activity in the atria of the heart. In this condition, the P waves, which represent the electrical activity generated by the atria, can exhibit certain characteristic patterns. One common finding in Atrial Tachycardia is irregular P waves.

The irregularity occurs because the electrical signals responsible for generating the P waves are not originating from the sinus node, the normal pacemaker of the heart, resulting in a lack of consistent rhythm. Another common presentation of P waves in Atrial Tachycardia is a sawtooth pattern, known as "sawtooth flutter waves."

These waves have a distinct appearance, resembling a series of sharp peaks and valleys, which can be observed on an electrocardiogram (ECG). The irregular or sawtooth P waves in Atrial Tachycardia can help differentiate this condition from other types of tachycardia and aid in its diagnosis.

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We can use the formula:v = u + atwhere:v = final velocity of the sprinter, which is 2.0 m/su = initial velocity of the sprinte, , the magnitude of the friction force is 300 N.

To determine the magnitude of the friction force, use the formula for force, F=ma, where m is the mass of the sprinter and a is the acceleration of the sprinter. The friction force is equal in magnitude and opposite in direction to the force of the sprinter's foot pushing backward against the ground.

Mass of the sprinter,

m = 60 kgTime the sprinter's foot is on the ground,

t = 0.40 sInitial velocity of the sprinter, u = 0 m/sFinal velocity of the sprinter,

v = 2.0 m/sWe need to calculate the friction force acting on the sprinter.To do this, we first need to calculate the acceleration of the sprinter. We can use the formula:v = u + where:

v = final velocity of the sprinter, which is 2.0 m/s

u = initial velocity of the sprinter, which is 0 m/st = time for which the foot is on the ground, which is 0.40 s

Substituting these values, we get:2.0

= 0 + a(0.40)Simplifying, we get:

2.0 = 0.4a

Dividing both sides by 0.4, we get:

a = 5 m/s² Substituting the values, we get:

F = 60 × 5F = 300 N

Therefore, the magnitude of the friction force is 300 N.

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The capacity to perform work, which entails applying force to move an object across a distance, is another definition of energy. Energy is moved from one item to another while work is done. Thus, option B is correct.

The definition of energy as the “power to accomplish work" refers to the capacity to apply a force that moves an object.

Any force that is exerted on an object, whether by a person or another object, is referred to as an applied force. An applied force is exerted on an object when someone pushes it across the room.

Energy is referred to by scientists as the capacity to work. Modern civilization is made possible by the discovery of how to change energy from one form to another and use it to complete activities.

Therefore, the ability to use an applied force to make an object move.

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The type of dependence, whether it is sine or cosine, depends on the phase angle of the function.

A sinusoidal function can be represented as A sin(ωt + φ) or A cos(ωt + φ), where A is the amplitude, ω is the angular frequency, t is time, and φ is the phase angle. The phase angle determines the horizontal shift of the function, and it determines whether the function is a sine or cosine.

When φ = 0, the function is a cosine, and when φ = π/2, the function is a sine. In general, if the phase angle is φ, then the function is a sine if (φ - π/2) is an odd multiple of π and a cosine if (φ - π/2) is an even multiple of π. Thus, the type of dependence, sine or cosine, depends on the phase angle of the function.

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Second class lever has mechanical advantage always more than one as load is in between fulcrum and effort making the effort arm longer than the load arm. It multiplies force. ... It does not multiply force but changes the direction of force.

Answer:

weight on earth is mg

which is 5*9.8

49 Newton

weight on moon is 1/6 th of weight on earth

1/6*49

8.166 Newton..

Answer:

1

For instance, on Earth, a 5.0-kg object weighs 49 N; on the Moon, where g is 1.67 m/s2, the object weighs 8.4 N.

2

The weight of the object on the surface of earth would be 5kg. The weight of the object on the surface of moon would be 5/6= 0.83 as the weight of any object on earth is six times than that on moon.

William Herschel thought he had found a comet when he spotted the green disk of Uranus.

Uranus is the seventh planet located far away from the Sun. It is a gaseous planet which was discovered in 1781, mistaken by a comet but after two years it was accepted as a planet. After decades of observations and only one close visit by a spacecraft, which shows us that Uranus has unique atmosphere.

Atmosphere of Uranus is mostly made up of hydrogen and helium as well as a small amount of methane and traces of water and ammonia. The presence of methane gas gives blue colour to Uranus so we can conclude that Uranus is the planet which was thought first a comet by William Herschel.

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39°C=1.28L

8°C=? Less

=8°C/39°C×1.28L

=8/39×1.28L

=10.24/39

=512/195

=2.6L

Answer:

light bends away from the normal when it moves from air into water-refraction

Answer: C.) Light slows down when it moves from air into water.

Explanation: i hope this helps :)

A negatively charged balloon is brought near a neutral, conducting sphere. The opposite side of the conducting sphere is touched. When touched, electrons move from the negatively charged balloon to the opposite side of the conducting sphere. This occurs due to the process of electrostatic induction.

When a negatively charged balloon is brought near a neutral conducting sphere and then touched, electrons move from the negatively charged balloon to the opposite side of the conducting sphere.

This occurs due to the process of electrostatic induction, where the presence of a charged object (the balloon) causes the redistribution of charge in a nearby conductor (the conducting sphere).

The negatively charged balloon repels electrons in the conducting sphere, causing them to move to the opposite side of the sphere due to the repulsive force.

When the opposite side of the sphere is touched, electrons can transfer to that side, equalizing the charge distribution and resulting in a redistribution of charge on the conducting sphere.

This process is temporary and the conducting sphere will return to its original state of being neutral once the charged balloon is removed.

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Answer:

draw the two atomic structures and then focus in on the electrons either gaining or losing and draw them with arrows and dots

Explanation:

i got a 5/5

20 characters

Answer: B

Explanation: The wavelength determines color. The wavelength is measured from crest to crest.

Answer:

(a). Work done is the physical quantity which is same for both boys.

(b).Power is the physical quantity which is different for both boys.

The ratio of power of both boys is 2:1

Explanation:

Given that,

Time of boy A= 30 min

Time of boy B = 60 min

(a), We need to find the physical quantity that is same for both boys

Using given that,

We know that,

Work done depends on the force and displacement.

Here, force and displacement is same for both boys.

So, we can say that the work done will be same for both boys.

(b).  We need to find the physical quantity that is different for both boys

Using given that,

We know that,

Power is equal to the work done divided by time.

Time is different for both boys so, the power will be different for both boys.

We need to calculate the ratio of power of both boys

Using formula of power

\(P=\dfrac{W}{t}\)

Put the value into the formula

For boy A,

\(P_{A}=\dfrac{W_{A}}{t_{A}}\)....(I)

For boy B,

\(P_{B}=\dfrac{W_{B}}{t_{B}}\)....(II)

From equation (I) and (II)

\(\dfrac{P_{A}}{P_{B}}=\dfrac{\dfrac{W}{30}}{\dfrac{W}{60}}\)

\(\dfrac{P_{A}}{P_{B}}=\dfrac{60}{30}\)

\(\dfrac{P_{A}}{P_{B}}=\dfrac{2}{1}\)

Hence, (a). Work done is the physical quantity which is same for both boys.

(b).Power is the physical quantity which is different for both boys.

The ratio of power of both boys is 2:1

The kinetic energy of the truck is approximately 1,964,180 Joules. The kinetic energy of the car is approximately 250,003 Joules.

To calculate the kinetic energy of each vehicle, use the formula:

Kinetic Energy (KE) = 1/2 × mass × velocity²

Given the mass and velocity of each vehicle, plug in the values and calculate the kinetic energy.

For the truck:

Mass = 6,000 kg

Velocity = 92 km/h

= 92,000 m/3600 s

≈ 25.56 m/s

Using the formula:

KE = 1/2 × 6,000 kg × (25.56 m/s)²

Calculating the result:

KE = 1/2 × 6,000 kg × 655.3936 m²/s²

KE ≈ 1,964,180 Joules

Therefore, the kinetic energy of the truck is approximately 1,964,180 Joules.

For the car:

Mass = 1,200 kg

Velocity = 100 km/h

= 100,000 m/3600 s

≈ 27.78 m/s

Using the formula:

KE = 1/2 × 1,200 kg × (27.78 m/s)²

Calculating the result:

KE = 1/2 × 1,200 kg × 771.6884 m²/s²

KE ≈ 250,003 Joules

Therefore, the kinetic energy of the car is approximately 250,003 Joules.

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Answer:

The work done on the hose by the time the hose reaches its relaxed length is 776.16 Joules

Explanation:

The given spring constant of the of the spring, k = 88.0 N/m

The length by which the hose is stretched, x = 4.20 m

For the hose that obeys Hooke's law, and the principle of conservation of energy, the work done by the force from the hose is equal to the potential energy given to the hose

The elastic potential energy, P.E., of a compressed spring is given as follows;

P.E. = 1/2·k·x²

∴ The potential energy given to hose, P.E. = 1/2 × 88.0 N/m × (4.20 m)²

1/2 × 88.0 N/m × (4.20 m)² = 776.16 J

The work done on the hose = The potential energy given to hose, P.E. = 776.16 J

Answer:

436.56 centimeters

Explanation:

heart this! My answer is correct, I search it.

Alberta will meet the paper ball 8m away from Fatima's position after 13.3 seconds.

What is the seconds?

Seconds is a unit of time and is the base unit of time in the International System of Units (SI). It is described as the length of 9,192,631,770 radiation periods that correspond to the change between the two hyperfine levels of the cesium-133 atom's ground state. One second is equal to 1/60 of a minute, 1/3,600 of an hour, 1/86,400 of a day, and 1/31,536,000 of a year.

Seconds are a unit of time that is equal to one sixty-fourth of a minute. It is the base unit of measurement for time in the International System of Units (SI). One second is equal to 1000 milliseconds or 0.000277778 minutes. Seconds can be used to measure very short periods of time, such as the time it takes for light to travel from one end of a football field to the other.

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If the heat generated by a stove element varies directly as the square of the voltage and inversely as the resistance, and the voltage is increased, the amount of heat generated will increase as well.

This relationship can be understood using the equation:

Heat ∝ (Voltage^2) / Resistance

When the voltage is increased, the square of the voltage becomes larger, resulting in a greater numerator in the equation. As a result, the overall heat generated increases. Conversely, if the voltage is decreased, the heat generated will decrease.

However, it's important to note that other factors, such as the specific characteristics and limitations of the stove element, may also influence the heat generated. This relationship assumes all other factors remain constant.

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Answer:

the answer is 3.8m/s in meters per second

Answer:

the sun is plasma

Explanation:

it is a hot ball of gas made out of oxygen

Answer:

Plasma

Explanation:

All stars are made of gas, however the sun is so hot that most of that gas is plasma