If a Ferrari, with an initial velocity of 10 m/s, reached 190 km/hr in 3 hours.

Answers

Answer 1
answer is incomplete ?

Related Questions

Research on interviewing has shown the importance of
O keeping a straight face and making small talk.
O self-promotion and smiling.
O making limited eye contact and not smiling too much.
O leaning back and making eye contact.
Performance evaluations that include personal reviews and input from peers, supervisors, customers, and others are known as
O summative appraisal.
O 360-degree feedback appraisal.
O multi-modal feedback.
O job satisfaction survey

Answers

Research on interviewing has shown the importance of leaning back and making eye contact (option D)Performance evaluations that include personal reviews and input from peers, supervisors, customers, and others are known as 360-degree feedback appraisal (option B).

What does it mean to interview?

Interview refers to an official face-to-face meeting of monarchs or other important figures.

It can also be a conversation in person (or, by extension, over the telephone, internet etc.) between a journalist and someone whose opinion or statements he or she wishes to record for publication, broadcast etc.

One importance of interview, which research has successfully pinpointed, is the control of facial expressions such as smiling gestures, posture etc.

360 degree feedback is an evaluation system or process in which employees receive confidential, anonymous feedback from the people who work around them. This typically includes the employee's manager, peers, and direct reports.

The 360 degrees Performance Appraisal method was first used in the 1940s. The 360 method provides each employee the opportunity to receive performance feedback from his or her supervisor, peers, staff members, co-workers and customers in an anonymous fashion.

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distant observer looks at the surface of a neutron star of 2m and radius of 11 km. how many seconds elapse for this distant observer for every 1 second measured on the surface of the st

Answers

The amount of seconds elapse for the distant observer will be 16.66sec.

When the core of a massive star undergoes gravitational collapse at the end of its life, protons and electrons are literally squashed together, leaving behind one of nature's most amazing creations: a neutron star. A neutron star packs about 1.3 to 2.5 solar masses into a city-sized sphere, perhaps 20 kilometers (12 miles) in diameter. Matter is so densely packed that a substance the size of a sugar cube weighs over a billion tons, about the same as Mount Everest.t=1000/60=16.66 sec“In a neutron star, we see a combination of strong gravity, strong magnetic and electric fields, and high velocities. The magnetic field is trillions of times stronger than Earth, so the pulsar's magnetic field is a high-energy particle accelerator. The magnetosphere accelerates particles to very high energies, making it a relatively bright source of gamma rays.Astronomers have discovered fewer than 2,000 pulsars, but the Milky Way galaxy is home to about a billion neutron stars. There should be.

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if there is going to be a total lunar eclipse tonight, then you know that:

Answers

If there is going to be a total lunar eclipse tonight, then you know that the Moon's phase is full.

What is a lunar eclipse?

The full moon phase is when lunar eclipses take place. When the Moon and Sun are exactly lined up, Earth's shadow falls on the Moon's surface, darkening it and occasionally turning it a brilliant red over the course of a few hours. Every lunar eclipse can be seen from half of the planet.

Total lunar eclipses occur when the moon is entirely submerged in the umbra of the earth's shadow. Hence, total lunar eclipse occurs when the Moon's phase is full.

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a metal bar magnet has a magnetic field in the region of space around it. the magnetic field is due to * 1 point captionless image a) magnetic monopoles embedded in the metal. b) a hidden voltage source in the metal. c) the motion of charged particles in the atom d)an electric current that runs along the length of the magnet

Answers

A metal bar magnet has a magnetic field in the region of space around it. The magnetic field is due to an electric current that runs along the length of the magnet.

The lines of magnetic field from a bar magnet form closed lines. By convention, the field direction is taken to be outward from the North pole and in to the South pole of the magnet. Permanent magnets can be made from ferromagnetic materials.

This region is called the magnetic field. If an iron object is near a magnet, but is not within the magnetic field, the object will not be attracted to the magnet. When the object enters the magnetic field, the force of the magnet acts, and the object is attracted.

Inside a bar magnet, since magnetic field are continous, they point from the south pole to the north pole as the magnetic enters from south pole from the outside and emerge from the north pole.

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Question 2 4 pts Goals that are short-term, specific, and moderately challenging lead to
O greater success
O self-actualization
O increased internal attributions.
O increased external attributions.

Answers

Short-term, precise, and moderately difficult goals are more likely to be achieved.

The current work connects goal setting to transformational leadership, whereas leading through goals is typically linked with a task-oriented leadership style. Employees participated in a two-time point online survey to learn more about how transformational leadership affects followers' commitment to the firm, work happiness, and proactive behavior. Results show that transformative leaders have an impact on how much followers value organisational goals and believe they are attainable. This objective attribute transmission of transformational leadership's impact on followers' work attitudes and proactive behaviour was discovered through many mediation analyses. Goal significance and goal attainability, however, appear to be of varying importance for the various outcomes.

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after protecting the goal, a 90 kg goalie celebrates by leaping 110 cm off the ground. how much work was done in the celebration?

Answers

A 90 kg goaltender celebrate by jumping 110 cm into the air after defending the goal. 970.20 J was work done throughout the celebration.

What is work done?

The sum of the displacement as well as the components of the force applied of the object in the displacement direction is the work done by a force. The body moves with certain acceleration when we push a blocks with certain force, and work is completed.

Briefing:

m = mass of the body = 90 kg

g = gravitational force

h = height = 110cm

Formula -

work done = mgh

                   = 90 × 9.8 × 110

                   = 970.20 J

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You make yourself and your friend a cup of hot chocolate and add vanilla ice cream. You quickly enjoy yours, but your friend takes a long time to come, so you get to observe theirs as a science experiment.
In what direction does the heat flow? (2 points)

Describe how the kinetic energy of the hot chocolate changes once you add the ice cream. (2 points)

How does the kinetic energy of the ice cream change once you put it in the hot chocolate? (2 points)

What happens to the temperature of each substance? Be specific. (2 points)

When will the temperature of the ice cream and the hot chocolate stop changing? (2 points)

Answers

The answers include the following;

The direction in which the heat flows is from hot chocolate to the vanilla ice cream. The kinetic energy of the hot chocolate decreases once you add the ice cream.The kinetic energy of the ice cream increases once you put it in the hot chocolate.The temperature of each substance will exchange heat till an equilibrium is reached.The temperature of the ice cream and the hot chocolate will stop changing when there is uniformity.

What is Temperature?

This is referred to as the degree of hotness or coldness of a substance and it is influenced by thermal energy.

The direction in which the heat flows is from hot chocolate to the vanilla ice cream and the kinetic energy of the hot chocolate decreases once you add the ice cream.

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Hello! I need a fast response
does the result of the forces, according to Newton's second law, include the force of weight?
Tnx in advance​

Answers

Answer:

Yeah exactly.

Explanation:

Look here down.

From Newtond second law of motion.

F= △P/tF= P2 -P1 ,Since Pmomentum = Mv tF= Mv2 - Mv1 t

F= M(V2-V1) Since v2 -v1 = a t t※F=Ma

And this force is included the force of weight which changes from ma to mg

if you are viewing an object with a 7 diopter lens and a 10 diopter lens, which one has to be held closer to a piece of paper when focusing a distant object? group of answer choices the 10 diopter lens the 7 diopter lens both have the same focal length neither one will focus an image.

Answers

The 10 diopter lens to be held closer to a piece of paper when focusing a distant object and diopter is unit of power of accomodation.

Two roughly fitting curved surfaces ground together will eventually become spherical spheres don’t bring parallel rays to a point this is called spherical aberration nearly axial rays (paraxial rays).

Two types of lens Convex and concave. Convex lenses make real images, concave make virtual images,the power of a lens (in diopters) is 1 over its focal length.

Implication of the gaussian formula is that when combining two lenses, add their power, adding a closeup filter allows a smaller object distance, changing object and image distances changes magnification.

lenses perform a 3D perspective transform of object space an object’s apparent size is inversely proportional to its distance linear lens motions move the in-focus plane non-linearly, focusing a lens changes the image size (slightly).

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calculate the normal boiling point of chloroform given that the standard enthalpy of vaporization of chloroform is 31.4 kj/mol and the standard entropy of chloroform is 93.7 j/mol·k.

Answers

The normal boiling point of chloroform is 335.11 kelvin or 62.11 Celcius.

What is entropy?

Entropy can be thought of as a rough indicator of energy quality, with lower entropy indicating higher qualityLow entropy energy is structured for storage (the efficient library).. Energy is chaotically stored in the random-pile library, with high entropy.

Briefing:

standard enthalpy of vaporization of choroform= 31.4 kj/kmol

standard entropy of chloroform= 93.7j/mol-k

the relation between the entropy and enthalpy is defined by,

    Δ S = Δ /  

   where S= entropy of chloroform

              H= enthalpy of chloroform

               T=Boiling point of chloroform

on putting values in equation

            93.7=31.4*1000 /T

              T=335.11 kelvin

              T=335.11-273= 62.11 celcius

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how did the first generation of stars differ from modern generations of stars? they were very short lived all of these answers are correct they were extremely luminous they were far more massive

Answers

They have been a lot greater big than maximum stars born today. Angular momentum performs an crucial position in big name formation.

The first-era stars are predicted to be very big, however the 2d-era stars may be low-mass items even though they're shaped from metal-loose gas. 1. Formation of the First Stars withinside the Universe Recent research tested that the primary stars withinside the universe are very big.

They shaped in small protogalaxies that advanced from density fluctuations withinside the early universe. and helium, the physics of big name formation desired the advent of our bodies that have been in many instances greater big and luminous than the sun. stars exploded as supernovae, dispersing heavy factors all through the universe.

As the Earth orbits across the Sun, constellations pass slowly to the west over the path of a year and we see special components of the sky at night time because, because the seasons change, we're searching in a special route in space.

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what is the magnitude of the emf induced between the two sides of the shark's head?

Answers

The induced emf between the two sides of the shark's head is 44*10-6 volts. the process whereby changes in magnetic flux cause a coil to develop a potential difference.

Here's the complete question:

A scalloped hammerhead shark swims at a steady speed of 1.0 m/s with its 83-cm-wide head perpendicular to the earth's 52 μT magnetic field. What is the magnitude of the emf induced between the two sides of the shark's head? Express your answer using two significant figures.

How to solve ?

Given:

The speed of scalloped hammerhead shark is: va=1.0ms

The width of head is:

wa=83cm=0.83m.

The magnetic field is:

Ba=52μT=53×10−6T

The expression for the change in area through which magnetic field moves is,

ΔAa=Δla.wa

Here,

Δla and wa are change in length and width respectively.

The expression for the speed of scalloped hammerhead shark is,

va=Δla/Δt

Here ,

Δt is time interval.

The expression for the magnetic flux is,

Δϕa=Ba.ΔAa

The expression for the induced emf by using the Faraday's law is,

ea=Δϕa/Δt

Solving for the induced enf:

ea=Ba.Δla.wa/Δt

⟹Ba.wa.Δla/Δt⟹Ba.wa.va

The expression for the magnitude of emf induced between the two sides of shark's head is,

ea=Ba.wa.va

Solving for the magnitude of emf induced between the two sides of shark's head:

ea=53×10−6T×0.83m×1.0m/s⟹43.99×10−6V⟹≈44×10−6V

Thus the magnitude of emf induced between the two sides of shark's head is 44×10−6V.

What distinguishes induced emf from electromagnetic fields?

According to Faraday's Law, if a magnetic flux across a loop changes, an induced emf results. The term "motional emf" is used to describe an emf that is changing because a conductor is moving in some way in a magnetic field.

What is another name for EMF?

When no current is flowing, electromotive force equals the potential difference. the fact that both EMF and potential difference (V) are expressed in volts, but they are not the same thing.

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determine the direction of the force on the charge due to the magnetic field. (figure 1)

Answers

The direction of the force on the charge due to the magnetic field is 0(if angle is 180°) and qVB (angle is 90°)

Magnitude force on moving charge particles is F = qvBsinθ

Direction of particle is given by right hand thumb rule,

Right  hand point in direction of v, the finger in direction of B.

Force is directly perpendicular to the right hand palm.

Angle. between. V and B. is 180. degrees

F = qVB sin 180° = 0

Angle between V and B is 90 degrees

F = qVB sin90° = qVB

A magnetic field is a vector field that explains the magnetic influence on electrically charged objects in motion, electric currents, magnetic materials,[1]: [2]. A force perpendicular to the magnetic field and its own velocity acts on a moving charge in a magnetic field. [1]: ch13 [3]: 278 The magnetic field of a permanent magnet attracts or repels other magnets and pulls on ferromagnetic materials like iron. In addition, three more magnetic effects—paramagnetism, diamagnetism, and antiferromagnetism—exert minute forces on "nonmagnetic" materials in a nonuniform magnetic field, however these forces are often so minute that can only be measured by laboratory apparatus

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three identical, small cork spheres are released from rest in a uniform electric field directed downward toward the floor. sphere x is uncharged, but spheres y and z are charged. sphere z remains suspended in the field. spheres x and y fall downward, but sphere x takes a longer time to reach the floor. what are the signs of the charges on spheres y and z ?

Answers

Sphere Y will have a negative and Z have a positive sign. The sign of charge q2 will be negative.

When the spheres are separated and the balloon is removed, the two spheres show an electrical charge. The left sphere ends with a positive charge. The sphere on the right ends with a negative charge. When two conductive balls touch together.

It is as if they become one excellent conductor and the combined charge of the two spheres spreads over the surfaces of the contacting spheres. If you release the spheres again, each will still have half the original total charge. The charge is then spread evenly over the surface of the sphere.

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Although gas is used as a conductor for fluorescent lighting and discharge lighting, metals are used for conductors for ________ conductor applications.

Select one:
O A. branch-circuit
OB. feeder
OC service-entrance
OD. all of the above

Answers

Metals are used for conductors for all of the above conductor applications.

option D is the correct answer.

Why are metals electrical conductors?

Metals are excellent conductors of electricity and heat because their atoms form a matrix through which outside electrons can easily move.

Electrical conduction in metals must follow Ohm's Law, which states that the current flowing in an Ohmic conductor is directly proportional to the potential difference across the metal conductors or wires.

V = IR

where;

V is the potential difference between the metal wireI is the current flowing in the wireR is the resistance of the wire

Metals are used for conductors for the following;

branch-circuitfeederservice-entrance

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Is polarization a property of all electromagnetic waves, or is it unique to visible light? Can sound waves be polarized? What fundamental distinction in wave properties is involved? Explain.

Answers

Yes, all electromagnetic waves have polarization as a characteristic. The primary difference in wave qualities involved in polarization of sound waves is amplitude.

Amplitude, The amplitude of the wave is the largest deviation of the wave from the mean position. It is the maximum height between the Center line and the Peak or Valley. There are waves in plane polarized light, and they all vibrate in the same direction. As the wave travels, the electric of a vector in circular polarization rotates about the direction of propagation. Reflection or travelling through filters, like particular crystals, can both cause light to become polarized.

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a 35.0-kg child swings in a swing supported by two chains, each 3.08 m long. the tension in each chain at the lowest point is 418 n. (a) find the child's speed at the lowest point. m/s (b) find the force exerted by the seat on the child at the lowest point. (ignore the mass of the seat.) n (upward)

Answers

The child's speed at the lowest point is 5.54 m/s and the force exerted by the seat on the child at the lowest point is 692 N.

A tension is a force along the length of a medium, especially a force carried by a flexible medium, such as a rope or cable. The word “tension” comes from a Latin word meaning “to stretch.” Not coincidentally, the flexible cords that carry muscle forces to other parts of the body are called tendons.

The Tension Force or the Force of Tension is the force transmitted through a rope, cable, string or wire pulled taut by forces acting on both ends.

The Tension Force, like all forces, is a vector and has both magnitude and direction. Direction,  Always a pull, In the direction of the rope, In opposite directions on opposite ends of the rope.

Any flexible connector, such as a string, rope, chain, wire, or cable, can exert pulls only parallel to its length, thus, a force carried by a flexible connector is a tension with direction parallel to the connector. It is important to understand that tension is a pull in a connector.

a)let the velocity at the lowest point be v

By balancing the force, we get

T + T = Mg + mv^2/l-------(1)

346+346 = 35*9.8 + 35*v^2/3.08

692=343 + 35v^2/3.08

v=5.54 m/s

b)let the force be F

At equillibrium, we get

F = Mg + mv^2/L

F = T+T            (from 1)

F = 2T

F = 692 N

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A person exerts a constant force of 45 N directed at angle θ to the horizontal on a crate of weight 100 N to pull it from one end of a room to another, a distance of 4.0 m. Given that the vertical component of the force is 12 N, calculate the work done by the person on the crate.

Answers

Answer:

45 newtons

Explanation:

A person exerts a force of 45 N at an angle θ then the work done by the person on the crate will be 173.48 J.

What is Work?

Work is a physics term used to describe the transfer of energy that takes place when an object changes above a distance because of an external force, at least some of which is given in the vector of the dislocation. The element of the force acting all along the path multiplied by the length of the path can be used to calculate work if the force is constant.

Mathematically, this idea is expressed as W = fd, where W is the effort and f is the force multiplied by d, the distance. Work is completed whenever the force is applied at an angle of with regard to the displacement.

As per the given information in the question,

Force, F = 45 N

Weight, w = 100 N

Distance, d = 4 m

The Vertical component of force, f(y) = 12 N.

To determine the force's component parts in this situation, we need formulae.

The horizontal component, F(x) = F cos θ

The vertical component, F(y) = 12 N

As the force F is given as 45 N, then,

45 sin θ = 12

sin θ = 12/45

θ = 15.466

Now,

F(x) =  F cos θ

= 45 cos (15.466)

F(x) = 43.37 N

The work required to move the crate 4 meters is determined by this horizontal component:

W = F(x) × D

W = 43.37 × 4

W = 173.48 J.

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how many coulombs of electric charge are required to deposit 25.0 g cu(s) at the cathode in the electrolysis of cuso4(aq)?

Answers

75984 coulombs of electric charge are required to deposit 25.0 g cu(s) at the cathode in the electrolysis of cuso4(aq)

The molar. mass of Cu. is 63.5 g/mol

25.0 g Cu corresponds to 25/63.5 = 0.3937 mol

Cu ²+   + 2e- → Cu

1 mole of Cu is deposited by 2 moles of electrons.

0.3937 moles of Cu is deposited by 2 × 0.3937 = 0.7874 moles of electrons.

Coulombs of electric charge required = 0.7874 × 96500 = 75984 coulombs

A promising method for producing carbon-free hydrogen from nuclear and renewable sources is electrolysis. Water is split. into hydrogen. and oxygen by a process. called electrolysis. In a device known as an electrolyzer, this reaction occurs. The size of an electrolyzer can vary, from small, appliance-sized machinery that is ideal for small-scale distributed hydrogen production to big, central production facilities that could be connected directly to renewable or other non-greenhouse gas-emitting sources of energy generation.

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a commuter backs her car out of her garage with an acceleration of . (a) how long does it take her to reach a speed of 2.00 m/s? (b) if she then brakes to a stop in 0.800 s, what is her deceleration?

Answers

a. 1.43 s long does it take her to reach a speed of 2.00 m/s.

b. −1.79m/s² is her deceleration.

Calculation :

a. We are given the initial velocity, u=0 m/s, the acceleration, a=1.4 m/s² and the final velocity, v=2.00 m/s. Therefore, we shall calculate the time taken to reach such a final velocity by applying the following equation of kinematics,

v=u+at [1]

=at

∴t=v/a   [Dividing both sides by the acceleration]

=[tex]\frac{2.00 m/s}{1.4 m/s^{2} }[/tex]

=1.42857 s

≈1.43 s

It takes her 1.43 s to reach a speed of 2.00 m/s.

b. From above, the initial velocity is now, u1=1.43 m/s and the final velocity, v1=0 m/s. Thus, the deceleration, a, is calculated using the same equation [1] as follows,

v=u+at

0=u+at

∴a=−ut=[tex]\frac{-1.43 m/s}{ 0.800 s}[/tex]

= −1.7875 m/s²

≈−1.79 m/s²

Therefore, the deceleration of the car is

1.79 m/s²

In mechanics, acceleration is the rate of change of an object's velocity with respect to time. Acceleration is a vector quantity (as long as it has magnitude and direction). The direction of an object's acceleration is given by the direction of the net force acting on that object. As described in Newton's second law, the magnitude of an object's acceleration is the combined effect of two sources.

The mass of this object is inversely proportional to the mass of the object, depending on the material from which it is made.

The SI unit of acceleration is meters per square second

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The green line of gaseous mercury at 546 nm falls on a double-slit apparatus. If the fifth dark fringe is at 0.115 from the centerline, what is the slit separation?

Answers

The green line of gaseous mercury at 546 nm falls on a double-slit apparatus. If the fifth dark fringe is at 0.115 from the center line, 1.36 × 10⁻³ m is the slit separation.

What is double-slit experiment?

It has been discovered that the double-slit experiment, which was conducted in the nineteenth century to study the characteristics of light, proves the duality of photons as well as the theories of superposition and quantum interference. There has been a long-running controversy about whether light is composed of particles or waves.

Given that,

The green line of gaseous mercury at 546 nm = 546 × 10⁻⁹ m

The fifth dark fringe is at 0.115 from the center line.

Thus, as we know,

d sin θ = mλ

d = mλ / sin θ

d = ( 5 × 546 × 10⁻⁹m) / sin 0.115

d = 1.36 × 10⁻³ m

So, 1.36 × 10⁻³ m is the slit separation.

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A box with mass 15 kg is pulled up an inclined plane as illustrated in the figure. What magnitude of force, F, must be applied to the box in order to move it up the ramp at constant speed if the coefficient of kinetic friction between the box and ramp is 0.115?

Answers

Answer:

o99i

Explanation:

500 joules of heat is absorbed by a system that does 200 j of work on its surroundings. 1) what is the change in the internal energy of the system? (express your answer to one significant figure.)

Answers

The change in the internal energy of the system is 3 *10^2 J

Work is done by system.

Hence work is negative.

Change in internal energy=500-200 = 300=3 *10^2 J

law of conservation Energy:

The law of conservation of energy states that energy is neither created nor destroyed, and can only be converted from one form of energy to another. This means that the same amount of energy is always available in the system unless supplied externally. This is especially confusing for non-conservative forces where the energy is converted from mechanical to thermal but the total energy remains the same. The only way to use energy is to convert it from one form to another.

The energy content of each system is determined by the formula:

UT=Ui+W+Q

where;

.UT is the total internal energy of the system.

.Ui is the initial internal energy of the system.

.W is work done by or on the system.

.Q is the heat added to or removed from the system. It is also possible to determine the change in internal energy of the system using the

equation: ΔU=W+Q

This is also a statement of the first law of thermodynamics.

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a 0.5kg hockey puck rockets towards the goalie. the goalie catches it in his glove, stopping it over the course of 0.3 seconds with a force of 400n. what is the acceleration of the puck in the glove?

Answers

When a 0.5 kilogramme hockey puck hurtles at the goaltender, its acceleration in the glove is 800 m/s2. F=ma a=F/m a=400/0.5 a=800 m/s2.

Acceleration refers to any process where velocity varies. There are only two ways to accelerate: either by speeding up your acceleration or by reversing your acceleration. Because velocity consists of both a speed and a direction, this is the case. You cannot possibly be accelerating if you don't also alter your direction and speed, regardless of how swiftly you are travelling. As a result, a jet does not suffer acceleration even while moving at a high speed—in this example, 800 miles per hour—because its velocity is constant.

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what is the equation for centripetal acceleration in terms of angular velocity and the radius?

Answers

ac=rω² In terms of rad/s, angular velocity describes how quickly an item is rotating around a curve. This acceleration is also known as a radial acceleration since it acts along the radius of the curved path.

What is centripetal acceleration?

Centripetal acceleration is a characteristic of an object's motion along a circular path. Centripetal acceleration applies to any item travelling in a circle with an acceleration vector pointing in the direction of the circle's centre.

What causes centripetal acceleration?

Centripetal accelerations are brought on by centripetal forces. The gravitational pull between them produces the centripetal force that drives the motion in the unique situation of the Earth's clockwise direction around the Sun and any satellite's rotational inertia around in any celestial body.

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Which is least affected by chemical weathering?(1 point)

a statue made of marble

a pile of tiles made of feldspar

a bridge made of iron rods

a chair made of plastic

Answers

The option that is least affected by chemical weathering is: A pile of tiles made of feldspar.

What is Chemical weathering?

The term "weathering" refers to the process by which rocks are disintegrated into smaller fragments by a variety of actions and mechanisms. Contrarily, chemical weathering refers to the degradation of rocks by chemical interactions between the constituents.

Clay minerals, such as quartz and feldspar, are least impacted by chemical weathering due to the lack of chemical interactions, making them the best choice in this circumstance.

In conclusion, the correct option is: a pile of tiles made of feldspar.

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when the outer layers of a star like the sun expand, and it becomes a giant, which way does it move on the h-r diagram?

Answers

When a star's outer layers, which are similar to the sun's, expand, the star travels upward and becomes cooler and more bright than the sun.

What is a star ?

Most galaxies have stars distributed throughout them that are born within dust clouds. The Orion Nebula is a well-known illustration of a dust cloud of this type. Even though stars are not alive, we refer to their beginnings and endings as "birth and death." It's a useful, though fantastical, approach to explain the star's ultimately disastrous interaction with matter and energy.

The outer layers start to enlarge, chill, and lose some of their radiance. The name "Red Giant" now refers to the growing star. Convection moves the energy from the shell-burning zone to the star's outer layers. The brilliance of the star eventually rises by a factor of 1000 or so. On the HR diagram, the star will move up and to the right along the Red Giant Branch during this phase of growth.

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12. (a) give an example in which the net force acting on an object is zero, yet the net torque is nonzero. (b) give an example in which the net torque acting on an object is zero, yet the net force is nonzero.

Answers

Think of a rod. The net force exerted on the rod would be zero if one force were acting in the downward at one end and an equal force were acting in the up direction at the other end.

What does force signify in science?

Science has a precise definition for the word "force." At this point, describing a force as a push or even a pull is perfectly acceptable. A force is not something that an object "has in it" or "contains." A force from that other object can affect something else. No inanimate item or living thing is excluded from the definition of a force.

Force and example are what?

Force is the term for an external source that causes a body to tend to modify or change its state. When force is applied to the body, it can also alter shape, size, and direction. For instance, kicking a ball, opening and closing doors, or kneading dough

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what is the average magnitude of the poynting vector 4.00 mi from a radio transmitter broadcasting isotropically (equally in all directions) with an average power of 260 kw?

Answers

307.4 μW/m² average magnitude of the pointing vector 4.00 mi with an average power of 250 kw

Power is produced when a force causes a displacement. Power has no bearing on how long it takes for a force to cause a displacement. The process's pace might range from swiftly concluding to taking some time.

For example, it takes an abnormally long time for a rock climber to elevate her body a few meters over the cliff's edge. On the other hand, a trail hiker may swiftly raise her body a few meters if she selects the faster path up the mountain. Despite making the same amount of work, the hiker completes the task far quicker than the rock climber..

S-average=power/area

power=260 kw

area=4π(8045)²

S-average=260/4π(8045)²

S-average=307.4 μW/m²

Therefore, the average magnitude with average power of 260 W is 307.4 μW/m²

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what is the minimum potential difference between the filament and the target of an x-ray tube if the tube is to produce x-rays with a wavelength of 0.160 nm ?

Answers

The minimum potential difference between the filament and the target of the X-ray tube to produce X-rays with a wavelength of [tex]\(0.160 \, \text{nm}\)[/tex] is approximately [tex]\(7750 \, \text{V}\)[/tex].

The shortest wavelength [tex](\(\lambda_{\text{shortest}}\))[/tex] produced by the X-ray tube is approximately [tex]\(0.365 \, \text{nm}\)[/tex].

To calculate the minimum potential difference [tex](\(V\))[/tex] between the filament and the target of an X-ray tube to produce X-rays with a specific wavelength, we can use the equation for the energy of a photon [tex](\(E\))[/tex]:

[tex]\[E = \frac{hc}{\lambda}\][/tex]

Where:

[tex]\(h\)[/tex] is the Planck's constant [tex](\(6.626 \times 10^{-34}\) J·s)[/tex],

[tex]\(c\)[/tex] is the speed of light in a vacuum [tex](\(2.998 \times 10^8\) m/s)[/tex], and

[tex]\(\lambda\)[/tex] is the wavelength of X-rays [tex](\(0.160\) nm)[/tex].

We also know that the energy of a photon is related to the potential difference [tex](\(V\))[/tex] by the equation:

[tex]\[E = eV\][/tex]

Where:

[tex]\(e\)[/tex] is the elementary charge [tex](\(1.602 \times 10^{-19}\) C)[/tex].

Now, we can equate these two expressions for energy and solve for [tex]\(V\)[/tex]:

[tex]\[\frac{hc}{\lambda} = eV\]\\\\\V = \frac{hc}{e\lambda}\][/tex]

Substitute the given values:

[tex]\[V = \frac{(6.626 \times 10^{-34} \, \text{J·s}) \times (2.998 \times 10^8 \, \text{m/s})}{(1.602 \times 10^{-19} \, \text{C}) \times (0.160 \times 10^{-9} \, \text{m})}\][/tex]

[tex]\[V = \frac{1.9876 \times 10^{-15} \, \text{J·m}}{2.5632 \times 10^{-28} \, \text{C}}\]\\\\\V \approx 7750 \, \text{V}\][/tex]

So, the minimum potential difference between the filament and the target of the X-ray tube to produce X-rays with a wavelength of [tex]\(0.160 \, \text{nm}\)[/tex] is approximately [tex]\(7750 \, \text{V}\)[/tex].

Now, to find the shortest wavelength [tex](\(\lambda_{\text{shortest}}\))[/tex] produced by the tube, we can rearrange the equation for [tex]\(V\) in terms of \(\lambda\)[/tex]:

[tex]\[\lambda = \frac{hc}{eV}\][/tex]

Substitute the minimum potential difference [tex](\(V = 7750 \, \text{V}\))[/tex] into the equation:

[tex]\[\lambda_{\text{shortest}} = \frac{(6.626 \times 10^{-34} \, \text{J·s}) \times (2.998 \times 10^8 \, \text{m/s})}{(1.602 \times 10^{-19} \, \text{C}) \times (7750 \, \text{V})}\]\\\\\\lambda_{\text{shortest}} = \frac{1.9876 \times 10^{-15} \, \text{J·m}}{1.2385 \times 10^{-15} \, \text{C}}\][/tex]

[tex]\rm \[\lambda_{\text{shortest}} \approx 0.365 \, \text{nm}\][/tex]

So, the shortest wavelength [tex](\(\lambda_{\text{shortest}}\))[/tex] produced by the X-ray tube is approximately [tex]\(0.365 \, \text{nm}\)[/tex].

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