a hockey puck is sliding across a level frozen pond with an initial speed of 6.7 m/s. friction is not negligible, and it comes to rest after sliding a distance of 15.356 m. what is the coefficient of kinetic friction between the puck and the ice?

Answer:

(A.) The magnetic field pushes negative charges and positive charges in opposite directions.

Explanation:

hope this helps:)

Electric charges that move through a magnetic field produce an electric current because, the magnetic field pushes negative charges and positive charges in opposite directions.

Some domains in magnetized materials will cancel, but the majority of the domains will be oriented in one direction, creating a net magnetic field. Because the domains in unmagnetized materials are randomly orientated and cancel, no visible field is produced.

A current will be induced in a coil of wire if it is exposed to a shifting magnetic field. Because of an electric field that is being generated, which drives the charges to move around the wire, current is flowing.

Even though it is not a force, this is referred to as an electromotive force, or emf. EMF, on the other hand, resembles the voltage offered by a battery. Therefore, a changing magnetic field across a wire coil must result in an emf, which in turn causes current to flow. Hence, option A is correct.

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A football player throws a football 30 meters in 2.5 seconds, divide 30 by 2.5 and get 12.

An object's speed, also known as "v," is the amount by which its position changes over time or by how much it changes per unit of time, making it a scalar number.  

The instantaneous speed is the upper limit of the average speed as the duration of the time interval approaches zero. The average speed of an item in a period of time is equal to the distance traveled by the object divided by the duration of the period. Velocity and speed are not the same thing.

The parameters of speed are time divided by distance. The metre per second (m/s), the SI measure of speed, is the most widely used unit of speed in daily life.

Therefore, A football player throws a football 30 meters in 2.5 seconds, divide 30 by 2.5 and get 12.

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Marble's final speed,  Vf = 0.88 m/s

Vector difference between the final and initial positions of an object is displacement. It is different from the distance the object has travelled along the way.

Velocity is a vector quantity and is defined as the displacement that an object undergoes with respect to time . Meter per second is the standard unit of velocity.

Given distance= 220cm and

time = 5 sec

We can calculate acceleration of the marble by using 2nd equation of motion:

s = Vi t + (1/2)at²

s = distance covered = 220 cm = 2.2 m

Let Vi = initial Velocity

= 0 m/s (as the marble was initially at rest)

To find acceleration, a  = ?

2.2 m = (0 m/s)(5 s) + (1/2)(a)(5 s)²

a = (2.2 m)(2) / (5 s)²

a = 0.176 m/s²

Using 1st equation of motion for final velocity (Vf)

Vf = Vi + at

Vf = 0 m/s + (0.176 m/s²)(5 s)

Vf = 0.88 m/s

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Answer:

K and N

Explanation:

Ionic character depends on the electronegativity difference between the bonding elements. The greatest the elctronegativity diffference the greatest the ionic character. The electronegativity difference between K and N is the greatest among the four options as N is one of the most electronegative elements.

Given that the focal length of the object is F = 2.5 cm.

We have to find the position of the object such that no image is formed.

For a convex lens, the image will not be formed if it is placed at the focus.

Thus, the object should be placed at 2.5 cm as it is the focal length.

To solve this problem, we need to use the concepts of velocity, overhead, and reference.
First, we know that the UFO is moving at a constant velocity, which means its speed and direction are not changing.
Second, the term "overhead" refers to the fact that the UFO is passing directly above the astronaut on the moon. This gives us a reference point for the UFO's location.
Finally, we need to consider the reference frame of the UFO. This means that we need to think about how time and distance are perceived from the perspective of the UFO.
Using the given information, we can calculate the time it takes for the UFO to travel from the earth to the moon in the UFO's reference frame.
From the astronaut's perspective on the moon, the UFO takes 2.6 seconds to pass overhead. This means that the distance the UFO traveled in that time is:
distance = velocity x time

We don't know the velocity of the UFO from the astronaut's perspective, but we can calculate it using the distance between the earth and the moon.
distance = 3.8 x 10^8 m
The time it takes for the UFO to travel from the earth to the moon in the UFO's reference frame is:
time = distance / velocity

To find the velocity of the UFO in the UFO's reference frame, we need to use the principle of time dilation. This means that time appears to slow down for objects that are moving relative to each other. The formula for time dilation is:
t' = t / √(1 - v^2/c^2)
where t is the time in the astronaut's reference frame, t' is the time in the UFO's reference frame, v is the velocity of the UFO, and c is the speed of light.
We know that t = 2.6 seconds and c = 3 x 10^8 m/s. Plugging in these values and solving for v, we get:
v = 0.866 c
Now we can use this velocity to calculate the time it takes for the UFO to travel from the earth to the moon in the UFO's reference frame:
time = distance / velocity
time = 3.8 x 10^8 m / (0.866 c)
time = 13.8 seconds
Therefore, from the UFO's reference frame, it takes 13.8 seconds to travel from the earth to the moon.

 In order to answer your question, we'll need to use the given terms: "velocity", "overhead", and "reference". Since the UFO is moving at a constant velocity and is observed passing overhead on the moon 2.6 seconds later, we can assume that the astronaut and the UFO are in the same inertial reference frame.
To find the time it takes for the UFO to travel from Earth to the moon in the UFO's reference frame, we can use the formula: time = distance/velocity. We're given the distance as 3.8 x 10^8 meters, but we don't have the velocity. Unfortunately, without the velocity, we cannot determine the exact time it took for the UFO to travel from the Earth to the moon in its reference frame.

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the speed of the fast train is: u = 1.4 x 10^2 m/s

The beat frequency is the difference between the frequencies of the two sound waves coming from the trains. We can use this information to calculate the speed of the fast train.

First, we need to know the frequency of the sound wave emitted by each train. Let's call the frequency of the sound wave from the fast train f1 and the frequency of the sound wave from the slow train f2.

We can use the formula for beat frequency:

beat frequency = |f1 - f2|

Plugging in the given beat frequency of 4.2 Hz, we get:

4.2 Hz = |f1 - f2|

Next, we can use the Doppler effect formula for sound:

f = (v +/- u) / (v +/- vs) * f0

where:
f = observed frequency
v = speed of sound (343 m/s)
u = speed of the observer (unknown)
vs = speed of the source (unknown)
f0 = frequency of the sound wave emitted by the source

For the observer standing near the tracks, we can assume that vs = 0.

So for the sound wave from the fast train, we have:

f1 = (v + u) / v * f0

And for the sound wave from the slow train, we have:

f2 = (v - u) / v * f0

Substituting these into the beat frequency equation and simplifying, we get:

4.2 Hz = u / v * f0

Solving for u, we get:

u = 4.2 Hz * v / f0

Plugging in the given frequency of the sound wave from the fast train (which is the same as f0), we get:

u = 4.2 Hz * 343 m/s / f1

Rounding to two significant figures, the speed of the fast train is:

u = 1.4 x 10^2 m/s

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Here's the neat, cool way to convert units like this:

-- 1 kilogram  =  1,000 grams

-- 1 meter  =  100 centimeters

So . . . . .

(1000 kg/m³) x (1000 g/kg) x (1 m/100 cm)³ =

(1,000 kg/m³) x (1,000 g/kg) x (1 m³/1,000,000 cm³) =

(1,000 x 1,000 x 1 / 1,000,000) (kg-g-m³ / m³-kg-cm³)  =  1 g/cm³

Answer:

C. oversaturated

Explanation:

Sana nakatulong

Mass flow rate = 78.1 kg/sFlow speed at point 1 = 6.89 m/sFlow speed at point 2 = 27.6 m/s Gauge pressure at point 2 = 150 kPa

a) The mass flow rate for the given system of pipes can be calculated using the Bernoulli's principle which is a statement of the conservation of energy in a fluid. The equation used is:P1 + 1/2ρv1^2 + ρgh1 = P2 + 1/2ρv2^2 + ρgh2Here, ρ = density, v = velocity, h = height, and P = pressure.Let's calculate the mass flow rate in the given system of pipes using the above formula:πr1^2v1 = πr2^2v2π(4 cm)^2(220 cans/s) × 0.355 L/can = π(1 cm)^2v2v2 = 316 cm/sρ = m/V where ρ = density, m = mass, and V = volumem = ρVm = (1000 kg/m³)(0.355 L/can)(220 cans/s)m = 78.1 kg/s. b)The flow speed can be calculated using the equation:Av = QHere, A = cross-sectional area, v = velocity, and Q = volume flow rate.Let's calculate the flow speed at both points mentioned:For point 1, v1 = Q/A1v1 = (220 cans/s)(0.355 L/can) / (8 cm²)(10⁻⁴ m²/cm²) = 6.89 m/sFor point 2, v2 = Q/A2v2 = (220 cans/s)(0.355 L/can) / (2 cm²)(10⁻⁴ m²/cm²) = 27.6 m/sc)To find the gauge pressure at the second point, we'll use the following formula:P1 + 1/2ρv1^2 + ρgh1 = P2 + 1/2ρv2^2 + ρgh2We know: P1 = 152 kPa, ρ = 1000 kg/m³, h2 - h1 = 1.35 m, v1 = 6.89 m/s, v2 = 27.6 m/s, and A1 = 8 cm², A2 = 2 cm².152 kPa + 1/2(1000 kg/m³)(6.89 m/s)^2 + (1000 kg/m³)(9.8 m/s^2)(0 m) = P2 + 1/2(1000 kg/m³)(27.6 m/s)^2 + (1000 kg/m³)(9.8 m/s^2)(1.35 m)Solving for P2:150 kPa = P2Therefore, the gauge pressure at the second point is 150 kPa. Mass flow rate = 78.1 kg/sFlow speed at point 1 = 6.89 m/sFlow speed at point 2 = 27.6 m/sGauge pressure at point 2 = 150 kPa.

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126 kg is the mass of the board (in kg)

m1=41 kg

m2= 85 kg

r1=3m

mass of the board= m1+m2

mass of the board=41+85

mass of the board=126 kg

In physics, mass is a way to describe inertia, a quality that all matter shares. Essentially, it is a mass of matter's resistance to altering its direction or speed in reaction to the application of a force. The amount of change caused by an applied force decreases as a body's mass increases. The kilogram, the ISU's unit of mass, is equal to 6.62607015 1034 joule seconds using Planck's constant (SI). One joule is created by multiplying one kilogram by one square meter per second. The kilogram is determined by exact measurements of Planck's constant because the second and the meter have already been defined in terms of other physical constants.

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It is True. Motorcyclists should ride in the wheel tracks of the vehicle directly in front of them on wet roads.

This is because the water will be pooled between these tracks, leaving less water on the tire and allowing better contact with the road surface, which is important for maintaining traction, stability and control. True, motorcyclists should ride in the wheel tracks of the vehicle directly in front of them on wet roads. Motorcyclists should maintain a safe distance and speed from the vehicle in front of them to avoid collisions or accidents on the road. By doing this, the motorcycle will have a better grip on the wet surface of the road, which will help in maintaining control on the motorcycle.

When driving on wet roads, motorcyclists should ride in the wheel tracks of the vehicle directly in front of them. By doing this, the motorcycle has better contact with the road surface, which will help in maintaining traction, stability and control. It is important for motorcyclists to maintain a safe distance and speed from the vehicle in front of them to avoid any collisions or accidents on the road.

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Explanation:

Answer

Explanation: R=p l/A , we are given specific resistance of aluminium in terms of silver.

The volume of the space would decrease if the piston were to quickly move out, and the process would then reverse itself, taking another hundredth of a second to complete before everything was back to normal. The time it takes for the molecules to balance out is constant, regardless of how quickly or how far the piston is driven.

In mechanical engineering, a piston and cylinder are two sliding cylinders with closed heads that move reciprocally within a somewhat larger cylindrical chamber under pressure from a fluid, as in an engine or pump. The piston rod, which is rigidly coupled to the piston, can pass through one of the end cover plates of a steam engine's cylinder, which is closed by plates at both ends, using a gland and stuffing box (steam-tight joint).

An internal combustion engine's cylinder is open at one end to allow the connecting rod, which connects the piston to the crankshaft, to freely oscillate and is closed at one end by a plate known as the head.

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The specific heat capacity is like having capacity to acquire or absorb heat. Because of this, object A will have higher specific heat capacity than object B

The specific heat capacity of a substance is the quantity of heat required to raise the temperature of unit mass of the substance by one kelvin.

Given that Object A and object B are both heated to 200 Celsius. Object A must absorb 4,000J of heat energy to reach a temperature of 200 Celsius, while object B must absorb 2,500J of heat energy to reach a temperature of 200 Celsius.

Since both are heated to the same temperature, that mean object A has large heat capacity to absorb 4,000J of heat energy to reach a temperature of 200 Celsius. While object B has a less heat capacity to absorb 2,500J of heat energy to reach a temperature of 200 Celsius.

Therefore, object A has the higher specific heat capacity than object B

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If one element of a series circuit fails, current ceases to flow completely is accurate.

A circuit is a closed conduct for electricity to travel through and is made up of parts like wires, resistors, capacitors, and transistors that regulate the flow of energy.

The components of a series circuit are connected in a line, the current passes through each one in turn. A broken circuit results from one component failing or being open, which stops the electricity from flowing at all. This is because a series circuit only has one path for the current to go, so if one component breaks down, the circuit as a whole is disturbed.

However, the first claim that series circuits are typically far more difficult to construct than straightforward parallel circuits is untrue. Series circuits just need components connected in a straight line, making them comparatively easy to build. It is also true that in a series circuit, electrons can only flow in one direction.

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Explanation:

Generally, stream flows are measured in CFS   = Cubic Feet per Second

The combined momentum after the collision is M * v units, where M represents the combined mass of the putty and the bowling ball, and v represents their final velocity.

When the piece of putty moving with 1 unit of momentum strikes and sticks to the initially stationary heavy bowling ball, the law of conservation of momentum applies. According to this law, the total momentum before the collision is equal to the total momentum after the collision.

Before the collision, the momentum of the putty is 1 unit (as given), and the momentum of the bowling ball is 0 since it is initially at rest. Therefore, the total momentum before the collision is 1 + 0 = 1 unit.

After the collision, the putty sticks to the bowling ball, and they move together as a combined system. Let's assume the combined mass of the putty and the bowling ball is M, and the final velocity of the combined system is v.

The momentum of the combined system after the collision is the product of the total mass and the final velocity: M * v. Since the putty sticks to the bowling ball, the final velocity of the combined system will depend on the masses of the putty and the bowling ball and the conservation of momentum equation.

Therefore, the combined momentum after the collision is M * v units, where M represents the combined mass of the putty and the bowling ball, and v represents their final velocity.

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Answer:

energy

Explanation:

The energy that is transferred in this time is E = 1.365 J.

To calculate Charge using formula,

Q = I x t

Q = 0.13A x 35 s

Q = 4.55 C

To calculate energy transferred,

E = Q x V

where,

Q is charge

V is potential difference

So by given values,

E = 4.55  x 0.30

E = 1.365 J

In order to perform work and to produce heat and light, energy must be transferred to a body or to a physical system. Energy is a quantitative property. Energy is a conserved resource; according to the law of conservation of energy, energy can only be transformed from one form to another and cannot be created or destroyed.

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Answer:

Well AM/Fm is digitally using soundwaves for cars through signal, which we cant hear without one (radio). Concerts are in real life and use wavelegnths that we hear because it bounces off overytihing.

Explanation:

Work and power are fundamental concepts in physics that have practical applications in everyday life.

Power and work are fundamental ideas in physics that have real-world implications. Power is the pace at which work is done, and work is defined as the product of force and displacement.

To calculate the amount of force and energy needed to complete a specific operation, such as lifting bulky objects or moving materials, engineers employ the concepts of work and power.

Work = fd while power = E/t

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No, not all waves move through various materials at the same pace. The characteristics of the medium itself, the kind of wave, and the frequency of the wave are only a few of the variables.

that affect how quickly a wave moves through a given medium. Sound waves, for instance, go through various materials at varying rates, depending on the density and elasticity of the medium. In general, solids transmit sound more quickly than liquids or gases do. Similar to how sound waves go through various materials at various rates, depending on the refractive index of the medium. Light waves, for example, constantly travel in a vacuum at a constant speed of around 299,792,458 meters per second (or about 186,282 miles per second). Nevertheless, as they go on.

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the volume of the cavity inside the ball is 5.3 × 10⁻⁴ m³.

The density of water is 1 g/cc or 1000 kg/m³. The density of steel is 7.99 g/cc or 7990 kg/m³. Therefore, the weight of a 1.10 kg steel ball in water can be expressed as follows;

Weight of steel ball in water = Weight of steel ball - Buoyant force

\(W = mg - Fb\)

From the question, weight in water is 8.75 N, and the mass of the steel ball is 1.10 kg. Therefore,  W = 8.75 N and m = 1.10 kg.

Substituting the values in the equation above, we have;

8.75 N = (1.10 kg) (9.8 m/s²) - Fb

Solving for Fb, we have

Fb = 1.10 (9.8) - 8.75

= 0.53 N

The buoyant force is equal to the weight of the water displaced.

Thus, volume = (Buoyant force) / (density of water)

Substituting the values in the equation above, we have;

V = Fb / ρV

= 0.53 N / (1000 kg/m³)

V = 0.00053 m³

= 5.3 × 10⁻⁴ m³

Hence, the volume of the cavity inside the ball is 5.3 × 10⁻⁴ m³.

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Answer:

Only main sequence stars have a well-defined relationship between spectral type and luminosity.

Explanation:

Low-mass stars have much longer lifetimes than high-mass stars.

Answer:

Seatbelts

Explanation:

Resistance to change in motion. it presses tour body outside of the loop, keeping you inside the cart

A left-linear grammar is a kind of grammar in which all the production rules are of type A → aB or A → a, where A and B are non-terminals and a is a terminal symbol.

An NFA (Nondeterministic Finite Automaton) can be transformed into a left-linear grammar using the following steps:

If q0 is the initial state of NFA, S → q0B is the starting rule, where B is the first state reached from q0 using an ε-transition.

If qf is the final state of NFA, then we create a rule of form B → a, where a is the input symbol, and also a rule of form B → aC, where a is the input symbol and C is the state reached from qf after consuming a.

The rest of the rules are generated based on the following principle:

If (p,a,q) is a transition of NFA, then we create a rule of form C → bD, where b is an input symbol, and D is the state reached from q after consuming a.

Consequently, we obtain a left-linear grammar from an NFA directly.

We can directly get left-linear grammar from an NFA by utilizing the above-described method. This is helpful because NFA is more versatile than a grammar, as it can recognize regular languages without needing to explicitly list all of their strings.

In contrast, grammar recognizes the language by explicitly listing all of its strings. A language may have an infinite number of strings, which makes grammar impractical to use in such cases.

Automata, on the other hand, are more practical in this situation because they define languages more naturally, by defining a set of strings that can be accepted by an automaton.

A left-linear grammar can be directly obtained from an NFA using the method described above. This technique is useful because automata are more versatile than grammars, making them more practical for languages with an infinite number of strings.

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The article is not found here but surveys are important because they are representative samples of a population.

A survey is a useful tool based on population samples, which is used to make statistical analyses in a given investigation.

Differences in surveys are generally due to small sample sizes, which may lead to errors in the analysis of data.

In conclusion, the article is not found here but surveys are important because they are representative samples of a population.

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Answer:

1,110,114.6 J

Explanation:

The height is 1857m, the mass is 61 kg, and the accelaration is 9.8 m/s^2. Plug in the equation GPE=h*m*a and you get 1,110,114.6.

h= height

m= mass

a= accelaration

GPE= gravitational potential energy

If you are at the grand canyon standing at the edge of a ledge 1857 meters high you have a mass of 61 kilograms, then your gravitational potential energy at the edge of the cliff would be 1111247.37 Joules.

Mechanical energy is the combination of all the energy in motion represented by total kinetic energy and the total potential energy stored energy in the system which is represented by total potential energy.

As total mechanical energy is the sum of all the kinetic as well as potential energy stored in the system.

ME = KE + PE

The total gravitational potential energy at the edge of the cliff would be

PE = m × g × h

PE =61 × 9.81 × 1857

PE =1111247.37 Joules

Thus, the total gravitational potential energy at the edge of the cliff would be  1111247.37 Joules.

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