Convert the following: 0.745 atm to mmhg. remember sig figs, and do not list units as part of your answer.

Answer:1 cm=0.01

Explanation: Uu divide

Answer:

C

Explanation:

A free-body diagram shows all the forces exerted or applied on an object.

A free-body diagram includes all the forces exerted on or by the object. Hence, option A is correct.

A free-body diagram is a diagrammatic representation of a single body or a group of bodies that are separated from their surroundings and display all the forces acting on them. A free-body diagram (FBD; sometimes known as a force diagram) is a graphical representation used in physics and engineering to show the applied forces, moments, and consequent reactions on a body under a specific condition.

It shows a body or group of connected bodies along with all the applied forces, times, and reactions that the body experiences. The body could be compact or comprise several interior pieces (like a truss) (such as a beam). To answer difficult problems, a series of free bodies and other diagrams may be required.

Hence, all the forces exerted on or by the object are included in the free-body diagram.

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Answer: Thunderstorm.

Explanation: When a cold, dry air mass collides with a warm, humid air mass over the land, that's a tornado, but on top of that the air rises and it cools and condenses that's a thunderstorm

When a cold, dry air mass collides with a warm, humid air mass over the land, that's a tornado, but on top of that the air rises and it cools and condenses that's a thunderstorm.

A thunderstorm, sometimes referred to as an electrical storm or a lightning storm, is a type of storm that is distinguished by the presence of lightning and the thunder that results from the lightning's acoustic effect on the Earth's atmosphere.  

Thundershowers are the name for relatively weak thunderstorms. A cumulonimbus is a form of cloud where thunderstorms develop.  They frequently produce heavy rain.  and occasionally snow, sleet, or hail and they are typically accompanied by strong wind.

However, some thunderstorms result in little or no precipitation. A squall line, often known as a succession of thunderstorms, can form or become a rainband.

Therefore, When a cold, dry air mass collides with a warm, humid air mass over the land, that's a tornado, but on top of that the air rises and it cools and condenses that's a thunderstorm.

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Explanation:

Position-time graphs measure/express the position of a skater over time relative to the start or finish of the race (depends on how it is used). Note: are the skaters in line vertically or horizontally? Like is one directly behind the other or are they next to each other?

If the two skaters are in line horizontally with each other, then their position will be the same relative to the start or finish of the race. This means if one passes the other one, the position would be different for all times after they pass. On the graph, it would look like one single line at the start (as position is same) which splits into 2 (representing the new difference in position due to 1 passing the other.

If the two skaters are in line vertically, their lines on the graph will appear parallel to each other (assuming they are going same speed) because the position is changing at the same rate, one is just reaching the same point after the other. If the skater behind overtakes the one in front. The lines on the graph will cross and continue either in parallel but with the other line on top to represent the moment where their position is the same right before they pass and after, where the second skater is now in front.

Hope this helped!

The rocket will splash down into the ocean at the time of 68.92 sec and the rocket get at its peak till 5946.6m.

(a) When h(t) = 0, the rock crashes down. Use the quadratic formula to find t after setting h(t) = 0.

0 = − \(4.9t^2\)+ 334t + 255

t = -0.75, 68.92

Time cannot be negative, so disregard the negative response.

t = 68.92 sec

(b) When the trajectory's slope is zero, the rock is at its highest point. The objective is to determine when the slope of this trajectory—which is also the tangent line—is zero. To accomplish this, set h'(t) to 0 and take the derivative of h(t).

h'(t) = -9.8t + 334

0 = -9.8t + 334

t = 34.08 sec

Utilize this moment to determine the ball's height, h(t), so that h (34.08 sec).

h(t) = − \(4.9\times 34.08^2\) + 334(34.08) + 255

h(t) = 5946.6m

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The moon’s orbit is closer to Earth is the event which occurs during high tide.

This occurs once in a month and is the phenomenon in which the moon is

closest to the Earth. This brings about an increase in the tide levels of the

water bodies.

This is the reason why the option B is the most appropriate option as the

moon’s orbit being closer to Earth also signifies a close proximity between

the moon and the earth

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Answer: The answer is: b) The moon’s orbit is closer to Earth.

Explanation: I have my ways :>

Have a great day!

-Sunny

The positively charged object repels: negatively charged objects.

Correct answer is B. negatively charged objects

When an object is positively charged, it means that it has an excess of positive electric charge. Objects with the same type of charge repel each other, while objects with opposite charges attract each other.
In the case of a positively charged object, it will repel other positively charged objects because they have the same type of charge. This repulsion occurs because like charges repel each other. On the other hand, a positively charged object will attract negatively charged objects because opposite charges attract each other.
To summarize, a positively charged object repels positively charged objects and attracts negatively charged objects

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The universe was created due to an explosion that occured in space and that the universe is expanding but still maintains an average density that's constant.

The Big Bang Theory proposes that a space-based explosion led to the creation of the universe. The space expanded because of the extraordinarily high temperature and density. The elements were then created after the cosmos cooled.

According to the Big Bang Theory, the universe was created by a tremendous explosion that took place billions of years ago. The stars and galaxies that exist in our universe were formed when matter was drawn together by gravity.

The steady state theory is a description of the idea that although the cosmos is expanding, its average density remains constant.

The steady state theory claims that even though the cosmos is expanding, its appearance remains unchanged.

In conclusion, the steady state hypothesis and the big bang theory both describe how the universe came into being.

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The direction of the angular momentum of the hoop depends on the orientation of the hoop and the direction of its rotation. A hoop that rolls without slipping on a horizontal surface has both translational and rotational motion. The linear speed of the hoop is constant and in the due east direction, but the hoop is also rotating about its center. The direction of the angular momentum of the hoop is perpendicular to the plane of rotation and is given by the right-hand rule. If the hoop is rotating clockwise when viewed from above, then the direction of the angular momentum is upward, perpendicular to the plane of rotation and pointing north. If the hoop is rotating counterclockwise, then the direction of the angular momentum is downward, perpendicular to the plane of rotation and pointing south. The angular momentum of a rotating object is a vector quantity that describes the quantity of rotation and is an important concept in the study of rotational motion in physics.

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The direction of the angular momentum of a hoop rolling without slipping on a horizontal surface, moving east at a constant linear speed, is clockwise.

This is because the angular momentum is defined as the product of the moment of inertia and the angular velocity. Since the hoop is moving in a straight line, the angular velocity is zero, and the angular momentum is equal to the moment of inertia multiplied by zero.

Since the moment of inertia is a positive quantity, the angular momentum is also positive, and thus it is clockwise. This direction is determined by the right-hand rule, which states that if your right hand is placed in the direction of motion, the thumb points in the direction of the angular momentum.

It is important to note that the direction of the angular momentum does not change as the hoop moves along the surface. This is because angular momentum is a conserved quantity and is not affected by any external forces or torques.

Furthermore, the magnitude of the angular momentum is also constant since the linear speed is constant and the moment of inertia remains the same.

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Answer:

The particles in gas A will have higher kinetic energy than that of gas B.

Explanation:

If gas A has a higher temperature then gas B, then the particles in gas A will have higher kinetic energy than that of gas B. This is because the kinetic energy of particles in a gas is proportional to to the temperature of the gas. The higher the temp, the faster the gas molecules moves, thus the bigger kinetic energy.

The metaphor (object) that shows how Aristotle's Three Artistic Proofs hold up one's argument is a stool. The correct option is 1.

The Three Artistic Proofs are Aristotle's fundamental concepts of argument that build a convincing case when utilized together:

Ethos: It is the ethical appeal; it establishes credibility with an audience.

Pathos: This refers to the emotional appeal; it appeals to the audience's emotions and sentiments.

Logos: It is the logical appeal; it uses reasoning and logical argument to persuade and convince the audience.

The metaphor (object) that shows how Aristotle's Three Artistic Proofs hold up one's argument is a stool. A stool is a three-legged object that can stand on its own with each leg equally supporting the weight. It is like the three artistic proofs, which are required in a good argument to hold it up. Without one of the three legs, the stool would be unstable and would fall apart. This metaphor is commonly used to explain how the three artistic proofs work together to build a convincing case. Option 1.

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Edison's 3 most famous inventions are electric power system, the phonograph, and the motion picture camera.

The electric power system: Edison's most famous invention was the electric power system, which provided a reliable and efficient way to generate and distribute electricity to homes and businesses. Edison's direct current (DC) system was eventually replaced by the alternating current (AC) system, but his work laid the foundation for the modern electric power industry.

The Phonograph: Edison developed the phonograph in 1877, a device that could record and play back sound. He initially intended the machine to be used as a dictation tool for office workers, but it quickly became a popular means of music reproduction.

The Motion Picture Camera: Edison's motion picture camera, the kinetoscope, was patented in 1891. It was the first device to capture and play back moving images and was a major step forward in the development of cinema.

These three inventions were major milestones in human history, changing the way we live, work and communicate. They set the stage for countless other technological advances, and Edison's contributions to science and industry continue to be celebrated today.

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The electric potential energy decreases and the electron's speed at f is greater than its speed at i.

The electric potential energy of a charged particle is given by the equation U = qV, where U is the potential energy, q is the charge of the particle, and V is the electric potential. In this case, as the electron moves along the trajectory from i to f, the electric potential decreases. This means that the electric potential energy of the electron decreases as well.

To further explain, electric potential is a measure of the electric potential energy per unit charge at a given point in space. When the electric potential decreases, it means that the amount of electric potential energy per unit charge is decreasing. As a result, the electric potential energy of the electron decreases as it moves along the trajectory.

Regarding the speed of the electron, we can apply the conservation of mechanical energy. As the electric potential energy decreases, the total mechanical energy of the electron remains constant. The total mechanical energy is the sum of the kinetic energy and the potential energy. Since the potential energy decreases, the kinetic energy must increase to maintain the constant total mechanical energy.

This increase in kinetic energy corresponds to an increase in the electron's speed at f compared to its speed at i. Therefore, the electron's speed at f is greater than its speed at i.

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Answer:

Real Image

Explanation:

Images which are formed on the screen by the actual intersection of light rays are called real images.

Answer:

Explanation:

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To solve this problem, you can use the equations of motion for rotational motion under constant acceleration:

ωf = ωi + αt --(1)

θ = ωit + 0.5αt^2 --(2)

where ωi is the initial angular velocity, ωf is the final angular velocity, α is the angular acceleration, t is the time elapsed, and θ is the angular displacement.

Using equation (1), we can find the angular acceleration of the wheel:

α = (ωf - ωi)/t

= (30.0 rad/s - 10.0 rad/s)/20.0 s

= 1.0 rad/s^2

Using equation (2), we can find the total angular displacement of the wheel during the 20.0 seconds:

θ = ωit + 0.5αt^2

= 10.0 rad/s × 20.0 s + 0.5 × 1.0 rad/s^2 × (20.0 s)^2

= 400.0 rad

To find the time at which the wheel has undergone half of this angular displacement, we can use equation (2) again:

θ/2 = ωit + 0.5αt^2

Rearranging and solving for t, we get:

t = [(-ωi) ± sqrt(ωi^2 + 2αθ)]/α

Since we are looking for a positive time, we take the positive root:

t = [(-10.0 rad/s) ± sqrt((10.0 rad/s)^2 + 2 × 1.0 rad/s^2 × 400.0 rad)]/1.0 rad/s^2

≈ 12.4 s

Therefore, the answer is B, 12.4 s.

Explanation:

v=?, u=0, a=?, S=22m.

Using the formula, S=ut+½at²

22={0×5}+(½.a.5²)

22=½.a.5²

a=44/25 = 1.76m/s².

Therefore, net force = work done = ma = 48×1.76 = 84.48N.

therefore, power = work done/time = 84.48/5 = 16.896W.

hope this helps you.

The eccentricity is 0.5

Answer:

Focal length

Explanation: No need for one...

Focal length  is unnecessary to include when accurately drawing ray diagrams.

The focal length is the distance, in millimeters, between the lens' optical center and the camera sensor, which records light data.

The elements inside the housing of a lens bend and shape light as it enters the front so that it converges into a single point of focus known as the "optical center."

It is crucial to remember that this measurement is made with the camera set to infinity and that lenses are named according to their focal length, which is indicated on the lens' barrel.

Therefore, Focal length  is unnecessary to include when accurately drawing ray diagrams.

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The static thrust of the turbojet engine mounted on a stationary test stand at sea level, with inlet and exit areas at 1.0 atm and 800 K respectively, is b.) Thrust 32680N.

To calculate the static thrust of the engine, we can use the ideal rocket equation:

Thrust = mass flow rate * exhaust velocity

The mass flow rate can be calculated using the equation:

mass flow rate = air density * inlet area * inlet velocity

The exhaust velocity can be approximated as the exit area times the exit velocity.

Given that the engine is mounted on a stationary test stand at sea level, we can assume the inlet velocity is zero. Additionally, we know the inlet and exit areas, as well as the atmospheric pressure at sea level.

By calculating the mass flow rate and the exhaust velocity using the provided information and plugging them into the ideal rocket equation, we arrive at the static thrust of approximately 32680N.

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Answer:

1.98 kg/m

Explanation:

5.94 divided by 3.00

To find the total flux of the electric field through the circular opening of a butterfly net held perpendicular to the field, we can use Gauss's Law. The flux through the net is equal to the electric field strength multiplied by the area of the circular opening.

According to Gauss's Law, the total flux (Φ) of an electric field through a closed surface is proportional to the total charge enclosed by the surface. In this case, the circular opening of the butterfly net acts as the closed surface.

Since the net is held perpendicular to the electric field, the electric field lines passing through the circular opening are parallel to the normal vector of the net, resulting in a uniform electric field over the circular area.

The flux (Φ) through the circular opening can be calculated using the formula Φ = E * A, where E is the electric field strength and A is the area of the circular opening. The electric field strength is constant over the circular area, and the area can be determined using the formula A = π * a^2, where a is the radius of the circular opening.

Therefore, the total flux of the electric field through the net is given by Φ = E * π * a^2, where E is the electric field strength and a is the radius of the circular opening of the butterfly net.

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Answer:

Option 4

Explanation:

The difference between the Paleozoic and Mesozoic Era is that animal complexity increased during the Paleozoic while the first flowering plants appeared in the Mesozoic Era.

The Paleozoic is the first part of the Phanerozoic Era, and is followed by the Mesozoic Era, which is the second part.

The difference between the Paleozoic and Mesozoic eras is "Animal complexity increased during the Paleozoic while the first flowering plants appeared in the Mesozoic era." The correct option is D.

The Paleozoic era and Mesozoic era are two major divisions of geological time.

The Paleozoic era, also known as the "age of invertebrates," spanned from about 541 million years ago to about 252 million years ago. During this era, the first multicellular organisms evolved, and there was a rapid diversification of life forms. This era saw the rise of fish, amphibians, and reptiles, as well as the first forests and the development of early land plants. The Paleozoic era ended with a mass extinction event that wiped out about 90% of all marine species and nearly 70% of all land species.

The Mesozoic era, also known as the "age of dinosaurs," spanned from about 252 million years ago to about 66 million years ago. During this era, reptiles continued to dominate the land, and dinosaurs evolved and became the dominant terrestrial animals. This era also saw the rise of birds, the evolution of flowering plants, and the emergence of mammals. The Mesozoic era ended with a mass extinction event that wiped out the non-avian dinosaurs, as well as many other species of plants and animals.

Here in the Question,

Option A, "Animals lived in the water during the Mesozoic and on land in the Paleozoic," is not a correct difference between the two eras. In fact, animals lived both in the water and on land during both the Paleozoic and Mesozoic eras. The Mesozoic era is famous for the rise of the dinosaurs, which were primarily land-dwelling animals, while the Paleozoic era saw the rise of amphibians and the first land-dwelling vertebrates.

Option B, "The first birds emerged in the Paleozoic era while mammals first emerged in the Mesozoic," is also not a correct difference between the two eras. In fact, birds did not emerge until the Jurassic period of the Mesozoic era, while the first mammals are believed to have emerged during the late Triassic period.

Option C, "Many different species of dinosaurs lived in the Mesozoic, but they all died off in the Paleozoic," is not correct either. Dinosaurs first appeared during the Mesozoic era and dominated the terrestrial ecosystem for more than 150 million years before they went extinct at the end of the Cretaceous period. The Paleozoic era ended more than 100 million years before the first dinosaurs appeared.

Therefore, The correct option is D. Animal complexity increased during the Paleozoic while the first flowering plants appeared in the Mesozoic era.

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Increasing the thermal conductivity or convection coefficient of a fin improves its effectiveness and efficiency while reducing its thermal resistance, whereas increasing the length or thickness of the fin decreases its effectiveness and increases its thermal resistance.

1. Increasing the thermal conductivity (K) of the fin enhances its ability to conduct heat, resulting in improved heat transfer from the fin base to the fin tip. This increases the effectiveness and efficiency of the fin by allowing more heat to be dissipated. Additionally, the thermal resistance of the fin decreases because the higher thermal conductivity facilitates better heat conduction.

2. Increasing the convection coefficient (h) improves the heat transfer between the fin surface and the surrounding fluid. This leads to increased effectiveness and efficiency of the fin as more heat is transferred by convection. The thermal resistance of the fin decreases because the higher convection coefficient enhances the convective heat transfer, reducing the resistance to heat flow.

3. Increasing the length (L) of the fin reduces its effectiveness since the heat has to travel a longer distance along the fin, resulting in more heat loss along the way. The efficiency of the fin remains unchanged since it depends on the temperature difference between the fin and the surrounding fluid. The thermal resistance of the fin increases because the longer length introduces more resistance to heat flow.

4. Increasing the thickness (or diameter) (D) of the fin decreases its effectiveness because a thicker fin offers a shorter heat conduction path from the base to the tip, reducing the surface area available for heat transfer. However, the efficiency of the fin remains unchanged as it depends on the temperature difference. The thermal resistance of the fin increases because the thicker fin introduces more resistance to heat flow due to the reduced surface area for conduction.

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1000N

From Newton's third law of motion, for every action there is an equal and opposite reaction. In other words, when two bodies are in collision, the forces acting between these bodies are equal in magnitude and opposite in direction.

In the case presented in the question, the bodies are the golf cart and the car. During collision, the golf car strikes the car with a 1000N of force (that is the action). Consequential of this, though in the opposite direction, the car will apply an equal force of 1000N (that is the reaction) on the golf car.

Therefore the car applied a force of 1000N on the golf cart.

Answer:

The car applied a force of 1000 N to the golf cart

Explanation:

Based on the laws of conservation of linear momentum, we have that linear momentum is always conserved during a collision.

By Newtons Second law, (impulse law),

\(Ft = [m_{1}(v-u)+ m_{2}(v-u)]\)

Let m 1 be the mass of the golf cart, and v 1 its initial velocity. They are = 200 kg and 5 m/s respectively.

Let m 2 be the mass of the car, and  V 2 it initial velocity. They are = 1500 kg and 0 m/s respectively.

The time involved is 1 second

Applying the values of the variables to the formula, we have.

\(F \times 1 = [200 \times (5-0) - 1500 \times (0-0)]\)

From this we have that the force the car applied to the golf cart is = 1000 N

Answer:

geocentric

i hope this helps!!!!

Explanation:

Answer:

In constructive waves, a greater amplitude wave is formed. In destructive waves, a wave with a smaller amplitude is formed. (option A)

Explanation:

Interference is called the superposition or sum of two or more waves. Depending mainly on the wavelengths, amplitudes and the relative distance between them, there are two types of interference: constructive or destructive.

Constructive interference occurs when there are two waves of identical or similar frequency (both have motions equal to an even number of similar wavelengths) and overlap the peak of one with the peak of the other. These effects add together and make a wave of greater amplitude. All of this is possible because the waves were in the same phase in the beginning (in the same position).

Destructive interference occurs in the opposite case to constructive. When the crest of one wave overlaps the valley of the other, they cancel out since they are in different phases when they overlap (they were in different positions). That is, as in the case of constructive waves they were added, in the case of destructive waves they cancel out (subtract).

So, In constructive waves, a greater amplitude wave is formed. In destructive waves, a wave with a smaller amplitude is formed.

Plastic ends up the hottest when equal masses of lead, plastic, and stone are given the same amount of energy, considering the specific heat capacities of the materials.

The specific heat capacity of a substance measures the amount of heat energy required to raise the temperature of a given mass of the substance by a certain amount. A higher specific heat capacity means that the substance can absorb more heat energy without experiencing a significant increase in temperature.

Given that the specific heat of plastic is 50 times larger than the specific heat of lead and 10 times larger than the specific heat of stone, we can conclude that plastic can absorb more heat energy compared to lead and stone.

If equal masses of lead, plastic, and stone are given the same amount of energy, the substance with the higher specific heat capacity will end up the hottest because it can absorb more heat energy before experiencing a significant temperature increase.

Therefore, plastic, with its higher specific heat capacity, will end up the hottest among lead, plastic, and stone when given the same amount of energy.

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Answer:

chemical energy is converted to electrical energy in a voltaic cell.

A ray of monochromatic light passes from medium X into air. The refractive index of medium X is 1.52.

It states that the ratio of sine of angle of incidence and angle of refraction is equal to the refractive index of second medium to the first medium.

sini/sinr = n₁/n₂

Given the angle of incidence i = 25 degrees, angle of refraction r =40 degrees, refractive index of air n₁ =1, then  refractive index of medium X is

n₂ = 1 x sin 40/sin25

n₂ = 1.52

Thus, the refractive index of medium X is 1.52.

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