9. A bolt of lightning transfers 28 coulombs of charge through an electric potential difference of 3. 2 x 107 volts between a cloud and the ground in 1. 5 x 10-3 second. Calculate the average electric current between the cloud and the ground during this transfer of charge

Answer:

1) Motion of air mass moving from equator northward (closer to earth axis)

2) Motion of object in orbit

3) Collision of 2 objects

4) Skater changing rotation by extension of arms

5) Motion of rocket due to velocity of expelled gas

The answer is  24.84kJ.

We apply the expression for the work done by the heat engine is,

\(W=E_{i n}-E_{o u t}\). Putting all given values in the equation we get the final answer.

What is heat engine?

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Given that the balloon is negatively charged and it is touching a wooden wall, the ballon will perform all the actions given in the answer choices.

A negatively charged balloon will pull positive charge on the wall surface towards it, since opposite charges attract each other.

Also, the negatively charged balloon touching a wooden wall will push any negative charge in the wall away from it. This is because like charges repel each other.

The negatively charged balloon also polarizes the molecules on the wall. This is because in molecules, atoms are bonded together since protons in one atom attract the electrons in the cloud of another atom.

Therefore, the correct choice is All of the above

ANSWER:

All of the above

Answer:

Explanation:

To find the distance covered by the dolphin , we use the formula

From the question

velocity = 17 m/s

time = 3600 s

We have

distance = 17 × 3600

We have the final answer as

Hope this helps you

The average induced EMF over the given time is approximately 12.56 mV. Hence, the correct answer is A) 12.56 mV.

To calculate the average induced EMF over the given time period, we can use Faraday's law of electromagnetic induction, which states that the induced EMF is equal to the rate of change of magnetic flux through the loop.

The magnetic flux (Φ) is given by the product of the magnetic field (B) and the area (A) of the loop.

The area of the circular loop can be calculated using its diameter:

A = π x (diameter/2)\(^2\) = π x (20 cm/2)\(^2\) = π x 10 cm\(^2\)

Since the loop is rotated from flat to vertical, the angle between the area vector and the magnetic field changes from 0° to 90°.

Therefore, the change in magnetic flux (ΔΦ) is equal to B x ΔA, where ΔA is the change in area during the rotation:

ΔA = A x sin(90°) - A x sin(0°) = A

The time taken for the rotation is given as 2 seconds. Therefore, the average induced EMF (ε) can be calculated as:

ε = ΔΦ / Δt = (B x ΔA) / Δt = (0.4 T) x (π x 10 cm\(^2\)) / (2 s)

  ≈ 0.4 x 3.14 x 10 mV

  ≈ 12.56 mV

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The focal length of the cornea of a normal human eye is approximately 44.06 centimeters.

The focal length of the cornea of a normal human eye with an optical power of +44.0 diopters can be calculated using the formula:

focal length (in meters) = 1 / optical power (in diopters)

Converting diopters to meters^-1, we get:

+44.0 diopters = 0.0227 meters^-1

Plugging this value into the formula, we get:

focal length = 1 / 0.0227 meters^-1

focal length = 44.06 centimeters

Therefore, the focal length of the cornea of a normal human eye is approximately 44.06 centimeters.

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Answer:T=1316.21 N

Explanation:

The tension has two components: Vertical and Horizontal. The

horizontal component is ma, the vertical component is mg. Using

Pythagoras theorem, we can find the tension as:

T=((ma)^2 (mg)^2)^(1/2)

So

T=((129*2.84)^2 (129*9.8)^2)^(1/2)

T=1316.21 N

Answer:

Possibly shape.

Explanation:

Because it is ripped in half. As you guys and the questioner can see that there is a wiggly strip down the middle. That also cause of a shape change.

I really hope my answer is right ^_^  

The characteristic of matter which is undergoing change in the picture is it's shape as it is being teared apart.

Matter in chemistry, is defined as any kind of substance that has mass and occupies space that means it has volume .Matter is composed up of atoms which may or not be of same type.

Atoms are further made up of sub atomic particles which are the protons ,neutrons and the electrons .The matter can exist in various states such as solids, liquids and gases depending on the conditions of temperature and pressure.

The states of matter are inter convertible into each other by changing the parameters of temperature and pressure.Matter possesses both particle and wave characteristics.Phase is a form of matter having uniform composition as well as physical properties.

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Answer:

E = V / d       125 V / .018 m = 6940 V/m     electric field

F = E Q       force on Q due to E

F = E n e     where n is the number of electrons in Q

m g = E n e

n = m g / E e     where n is the number of electrons e needed to support drop

n = 1.6 * 10E-16 * 9.8 / (6940 * 1.6 * 10E-19)

n = 1.41

Since n needs to be an integral number of charges, the drop would

not be suspended (motionless under these conditions).

A gas giant planet orbiting a distant star would be expected to have:

- Evidence for hydrogen in its spectrum.

Gas giant planets are primarily composed of hydrogen and helium, similar to the composition of the Sun. These planets have thick atmospheres consisting mainly of these gases. When scientists study the spectrum of light coming from a gas giant planet, they would expect to see characteristic absorption or emission lines indicating the presence of hydrogen in its atmosphere.

While gas giants like Saturn in our own solar system have ring systems, not all gas giants necessarily have them, so option A is not universally expected.

The density of a gas giant planet can vary depending on its composition and mass, so it may or may not have a density less than water, making option B not universally applicable.

The presence of many large moons orbiting in different directions is not a defining characteristic of gas giant planets and would depend on the specific dynamics and history of the planetary system, so option C cannot be generalized for all gas giants.

In summary, the most expected characteristic for a gas giant planet orbiting a distant star is evidence for hydrogen in its spectrum.

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The angular separation between first-order diffraction peaks for X-rays of wavelength 0.15 nm scattered from NaCl with scattering planes parallel to the surface is approximately 30.54 degrees (2θ).

The angular separation between first-order diffraction peaks can be calculated using Bragg's law, which relates the angle of diffraction to the wavelength and the distance between the scattering planes:

nλ = 2d sinθ

where n is the order of diffraction (in this case, n=1), λ is the wavelength of the X-rays (0.15 nm), d is the distance between the scattering planes, and θ is the angle of diffraction.

For a crystal with parallel scattering planes, the distance between the planes is equal to the interplanar spacing, denoted as "d". For NaCl, the interplanar spacing for the (1 1 1) planes is 0.282 nm.

Plugging in these values into Bragg's law and solving for θ:

sinθ = nλ / 2d

= 1(0.15 nm) / 2(0.282 nm) = 0.2658

θ = sin⁻¹(0.2658) = 15.27°

Therefore, the angular separation between first-order diffraction peaks for X-rays of wavelength 0.15 nm scattered from NaCl with scattering planes parallel to the surface is approximately 30.54 degrees (2θ).

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Answer:

6 hours

Explanation:

240/40 =6

The speed of the truck is 40 miles per hour and distance travelled by the truck is 240 miles. Then, the time take for this travel is the distance divided by the speed that is 6 hours.

Speed is a physical quantity that describes the distance is covered per unit time. Speed is a scalar quantity thus having magnitude only. The rate of speed is called velocity. Velocity is a vector quantity.

The longer distance covered by an object within small time, the object is said to have greater speed. Thus speed is the ratio of change in distance to the change in time.

Given  that, speed of the truck = 40 mph

distance covered  = 240 miles

Time = distance/speed

t = 240 miles/40 mph = 6 hours.

Therefore, the time taken to travel by the truck is 6 hours.

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Answer:

Explanation:

You can drive at 60 miles per hour

D = 60 miles

t = 1 hour

Speed:

V = D / t = 60 / 1 = 60 mph

Differential stress forces constituents of the rock to become parallel to one another. B. Differential stress

Differential stress occurs when forces act on a rock in different directions and with different intensities. This type of stress causes the constituents of the rock to become parallel to one another, resulting in a preferred orientation of minerals known as foliation. Pressure, on the other hand, is a type of stress that acts equally in all directions and does not cause foliation. Strain refers to the deformation that occurs as a result of stress, and heat from a nearby pluton can cause metamorphism, but it does not necessarily cause the constituents of the rock to become parallel. Finally, starch is not related to this topic. In summary, differential stress is the key factor that leads to the development of foliation in rocks.
B. Differential stress

Differential stress is a type of force that causes constituents of a rock to become parallel to one another. This stress is typically a result of tectonic forces acting in different directions and magnitudes, causing deformation and realignment of mineral grains within the rock. This process can ultimately lead to changes in the rock's structure, orientation, and even its mineral composition. Differential stress is an essential factor in the formation of metamorphic rocks, as it influences the development of foliation or layering, which is characteristic of many metamorphic rocks. In summary, differential stress plays a crucial role in the deformation of rocks and the development of foliation in metamorphic rocks by causing the constituents of the rock to become parallel to one another.

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Answer:The role of a hotel manager is an incredibly varied one, and for many leading hotel managers, no two days are ever the same. While this does make the role a hugely inspiring and motivating one, it also means that success requires a very broad set of skills.The best hotel managers are hugely experienced in a wide range of different areas, and have plenty of tips and tricks up their sleeves. From managing budgets to motivating team members, hotel managers need to be able to do it all.Whether you’re an experienced hotel manager looking to brush up on your knowledge, or you’re a budding hospitality team member hoping to rise through the ranks, there are plenty of ways to improve.Focus on skills that develop your leadership potential, and try to gain a more thorough understanding of the most important aspects of your business. Dedicate your time to improving your budgeting skills, understanding how to motivate team members, and ensuring that nothing that happens in your hotel escapes your notice.If you want to put your hotel on the map, you should also be keeping an eye out for emerging trends, and making sure you’re in the know when it comes to all things hospitality. Do this well and you’ll soon be able to spot the next big thing before it happens, and consistently impress both your guests and your team members.Be present in your hotelAll too often we hear of hotel managers so swamped by admin duties that they spend the vast majority of their time in the office. And while hotel managers do need to be at their desks from time to time, neglecting time in the hotel to get ahead on paperwork is often a mistake.Hotel managers need to know their hotel inside out. They need to know how different processes work, how teams interact with each other, and where any problem areas might lie.They need to be able to spot an issue before a guest does and make sure that all team members are fulfilling their duties with the utmost care and attention. And that can’t be done from a desk.A good hotel manager should be spending a considerable proportion of their day in the hotel, observing all that goes on – and talking to guests and staff. There’s no substitute for time spent in the hotel, so make sure you’re present!Motivate team membersThe ability to manage and motivate a team is one of the key responsibilities of a hotel manager, and it’s absolutely essential if the business is to be a success. It’s no secret that a well-motivated team will always outperform an apathetic one, and in hospitality staff motivation really matters.Great leadership skills start with the ability to motivate, inspire and engage. Focus on ways to get staff on board with your ideas, and make sure they’re excited about the future of the business.Give staff opportunities to grow within the business, and retain top talent by providing a clear pathway to promotions, bonuses, and other rewards.

The force behind a river's flow is gravity. A river is a body of freshwater that flows downhill from its source, usually in mountains or hills, to a point where it meets a larger body of water like a lake or the ocean.

Rivers are long and constantly moving, and they are shaped by the surrounding landscape's features, like hills, valleys, and canyons. Gravity is the force that pulls everything towards the center of the earth, keeping everything in order. Every item, whether it's a person, a book, or a river, is pulled toward the ground by gravity. The force of gravity keeps the river moving downstream in the same direction. What is the relationship between gravity and a river's flow? The force behind a river's flow is gravity. The gravitational pull of the earth makes the water flow downhill, and it moves towards the sea because it follows the downhill path of least resistance. Gravity is what causes the river to move in the direction that it does, and it is also responsible for the energy that drives the movement. The steeper the slope of the land, the more the force of gravity acts on the water, and the faster it moves.

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Answer:

3.2

Explanation:

The computation of the relative density of the body is shown below:

Given that

W denotes the weight of the body in air = 160 N

ρ' denotes  density of the body

V denotes  volume of the body

Now weight of the body in the air is  

W = ρ' V g   ............................... (1)

And,

W' denotes weight of the body in liquid = 120 N

Now the force of buoyancy is

F = W - W'

= 160 - 120

= 40 N

And, ρ denotes density of liquid

The force of buoyancy is  

F = ρ V g .................................(2)

Now divide equation 1 from equation 2

160 ÷ 40 =  ρ' V g  ÷ (ρ V g )

4 =  ρ'  ÷ (0.8 )

ρ' = 3.2

To ensure a constant current flow through a solenoid, it is connected to a battery.

We are aware that like poles repel each other whereas opposing poles attract. The bar magnet will therefore be drawn to the solenoid. Therefore, the force must be directed at the solenoid's left side.

A neutral particle in physics is one that has no electric charge, as a neutron. The subclass of neutral particles known as truly neutral particles, which are identical to their own antiparticles, should not be confused with the term neutral particles.

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The answer is 86.4 degrees north of east. To arrive at the destination, the plane must fly in a direction that is a combination of its air speed and the wind direction.

Let's call the direction the plane must fly "x" degrees north of east. The plane's ground speed is the vector sum of its air speed and the wind speed. Since the wind is blowing due west and the plane is flying directly north, the wind will have no effect on the plane's northward speed. However, the wind will reduce the plane's eastward speed.

Using trigonometry, we can find that the plane's ground speed is approximately 424.3 km/hr. Since the plane needs to travel 500 km, it will take approximately 1.178 hours to reach its destination.

During that time, the wind will have pushed the plane 11.78 km to the west. We can use trigonometry again to find that the angle whose tangent is 11.78/500 is approximately 1.34 degrees.

Therefore, the plane must fly in a direction that is 90 degrees minus 1.34 degrees, or 88.66 degrees, north of east. Rounding to one decimal place, the answer is 86.4 degrees north of east.

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Answer:

The distance of one lap on this track from the start line to the finish line is 400 meters. Two laps around the track is 800 meters, half a lap is 200 meters, and so on.

    Remember, displacement is the direction from the starting point and the length of a straight line from the starting point to the ending point. If a runner was going to run 400 meters (one lap around the track), they would start and stop at the same place on the track. Therefore, their displacement would be 0.

Explanation:

hope this helped

Answer:

\(\boxed {\boxed {\sf Gabi \ had \ greater \ displacement}}\)

Explanation:

Displacement is the change in the position of an object.

Abigail runs a complete lap around the track, which is 400 meters. Even though she ran 400 meters, she has no displacement. If she starts and ends at the same spot, there is no change in position.

Gabi runs a 50 meter dash in a straight line. Gabi has 50 meters of displacement. She runs in a straight line and is 50 meters away from where she began.

While Abigail ran the farther distance, Gabi had the greater displacement.

Answer:

Explanation:

According to Newton's third law of motion, every action has an equal and opposite reaction. When the astronaut throws the water bottle, the bottle exerts a force on the astronaut in the opposite direction. Therefore, we can consider the force exerted on the water bottle to be equal in magnitude to the force exerted on the astronaut in the opposite direction.

To calculate the force exerted on the water bottle, we can use the formula:

Force = mass x acceleration

The mass of the water bottle is 1.0 kg, and its initial speed is 8 m/s. We can assume that the space station is in a state of free-fall, which means that the acceleration due to gravity is negligible.

Therefore, the force required to move the water bottle is:

Force = mass x acceleration

= 1.0 kg x 8 m/s

= 8 N

Therefore, it took a force of 8 Newtons to move the water bottle.

Answer:

4. The choose b. 0.000355

Ans; 3.55× 10-⁴ = 0.000355

5. The choose C. 80600

Ans; 8.06 ×10⁴= 806×10² = 80600

I hope I helped you^_^

Answer:

Sufrirá una deflección en su recorrido.

Explanation:

Las partículas alfa son nucleos de He (dos protones mas dos neutrones), por lo tanto tienen una carga neta positiva.

Ahora, al acercarse al nucleo de un átomo con muchos protones y con baja energía, la partícula alfa sufrirá una deflección en su recorrido debido a las fuerzas de repulsión electrostática que siente la partícula, ya que el nucelo posee caraga positiva.

Espero te haya sido de ayuda.

Explanation:

divide the distance by the time it takes to travel that same distance, then add your direction to it.

Or change in displacement divided by change in time.

Answer:

The distance between the Earth and the Sun is:

1.5 multiplied by 10 raised to the power 8 km

Explanation:

(5.0 x 10²) x (3.0 x 10⁸) = 1.5 x 10¹¹ meters = 1.5 x 10⁸ km.

Answer:

a. less than 1 second.

Explanation:

The hang time, or the time one's feet are off the ground during a jump, for most athletes is typically less than 1 second. When performing a jump, athletes exert force to propel themselves off the ground, and the time they spend in the air is relatively brief. The exact duration of hang time can vary depending on factors such as the height of the jump, the individual's athletic ability, and the specific sport or activity being performed. However, in general, hang time for most athletes falls within the range of fractions of a second rather than considerably more than 1 second.

In conclusion, the acceleration of the hollow spherical shell as it rolls down the slope is equal to the net force acting on it divided by its mass. The exact value of the acceleration depends on the radius of the shell, which is not provided in the problem.

To solve this problem, we can apply the principles of rotational motion and the concept of torque.

Given:

Mass of the hollow spherical shell (m) = 1.50 kg

Angle of the slope (θ) = 31.0°

We need to determine the acceleration of the shell as it rolls down the slope.

First, let's calculate the gravitational force acting on the shell. The gravitational force can be determined using the formula:

F_gravity = m * g

where g is the acceleration due to gravity, which is approximately 9.8 m/s^2.

F_gravity = 1.50 kg * \(9.8 m/s^2\) = 14.7 N

Next, let's analyze the forces acting on the shell as it rolls down the slope. There are two main forces involved: the gravitational force (F_gravity) acting vertically downward and the normal force (N) acting perpendicular to the surface of the slope.

The component of the gravitational force parallel to the slope can be calculated as:

F_parallel = F_gravity * sin(θ)

F_parallel = 14.7 N * sin(31.0°) = 7.73 N

Since the shell rolls without slipping, the friction force (f) can be calculated as:

f = μ * N

where μ is the coefficient of static friction. However, since the shell is rolling without slipping, the friction force is zero, as there is no relative motion between the surface and the shell.

Since there is no friction force, the net force acting on the shell is the parallel component of the gravitational force:

Net force (F_net) = F_parallel = 7.73 N

Finally, we can use Newton's second law for rotational motion to determine the angular acceleration (α) of the shell:

F_net = I * α

where I is the moment of inertia of the hollow spherical shell.

The moment of inertia of a hollow spherical shell can be calculated as:

I = (2/3) * m * R^2

where R is the radius of the shell.

Since the radius is not given in the problem, we cannot calculate the exact value of the angular acceleration. However, we can analyze the rotational motion of the shell.

As the shell rolls down the slope, it experiences a torque due to the net force acting on it. The torque can be calculated as:

τ = F_net * R

where R is the radius of the shell.

Since the shell rolls without slipping, the linear acceleration (a) can be related to the angular acceleration (α) as:

a = R * α

Combining these equations, we have:

τ = m * a * R

F_net * R = m * a * R

F_net = m * a

Therefore, the net force is equal to the mass of the shell times its linear acceleration.

In conclusion, the acceleration of the hollow spherical shell as it rolls down the slope is equal to the net force acting on it divided by its mass. The exact value of the acceleration depends on the radius of the shell, which is not provided in the problem.

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Answer:

\(4ms^{-2}\)

Explanation:

F = ma

Rearrange to get acceleration on its own:

a = \(\frac{F}{m}\)

Substitute 20 for F and 5 for m:

a = \(\frac{20}{5}\) = 4 meters/second/second

Ghez's statement about "looking at a pebble at the bottom of a stream" refers to the difficulty of observing and studying black holes.

Ghez is referring to the fact that black holes are incredibly dense and have an intense gravitational pull that makes it difficult to observe them directly. Instead, scientists must infer their presence through the effects they have on nearby stars and other matter.

This requires extremely sensitive instruments and sophisticated techniques, much like trying to spot a pebble at the bottom of a stream. The comparison emphasizes the challenges involved in studying black holes and highlights the incredible achievements of Ghez and her colleagues in doing so.

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