If the magnitude of a vector is 13, and the angle it makes with
the x-axis is 31º, what is its vertical vector component? Round
your answer to the nearest hundredth.

Answer:

0.1 A

Explanation:

From the question,

V = IR............ Equation 1

Where V = Voltage, I = current, R = Resistance.

Given: I = 0.2 A, R = 10 ohms.

Substitute into equation 1

V = 0.2(10)

V = 2 volt,

If the resistor is replaced with a 20 resistor, The nwe current is

I = V/R................ Equation 2

I = 2/20

I = 0.1 A

For a 10-pole, three-phase alternator with 60 slots, each coil spanning 5 slots, and a half-coil winding, there are 12 coils per phase.

The number of coils per phase in a three-phase alternator can be calculated by considering the number of poles and the number of slots. In this case, we have a 10-pole alternator with 60 slots. Each coil spans 5 slots, and the winding used is half-coil.
To calculate the number of coils per phase, we can use the formula:
Number of coils per phase = (Number of slots) / (Number of slots spanned by each coil)
Given that each coil spans 5 slots, we can substitute this value into the formula:
Number of coils per phase = 60 / 5
Simplifying the equation:
Number of coils per phase = 12
Therefore, there are 12 coils per phase in this three-phase alternator.
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Answer:

its 4 right

i hope it is

Answer:

im pretty positive its 4 , if not its 1

The law of physics that this scenario would violate is the law of conservation of energy.

The law of conservation of energy states that energy possessed by an object or physical body can neither be created nor destroyed but can only be transformed from one form to another.

This ultimately implies that, the energy possessed by the rock at the beginning must be equal to the energy possessed by the rock at the end in accordance with the law of conservation of energy.

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The correct answer is D. Amount of time and area of physical contact between the substances.

Explanation:

Heat transfer refers to the flow of thermal energy or heat between two or more objects. This process involves multiple factors and implies heat from the hottest object goes to the coldest one until there is an equilibrium. To begin, heat transfer depends on the amount of thermal energy in the objects because objects must have a different amount of thermal energy for heat to flow.

Besides this, the amount of energy that flows depends on the time and the contact between the substances of objects. Indeed, objects need to be in contact or close to each other for heat to transfer, and the time needs to be enough for the process to occur. For example, if you place a pot over the fire just for a few seconds it is likely the heat transferred is minimal, which does not occur if you leave the pot more time. At the same time if the pot is in close contact with fire more heat will be transferred.-

Answer:

the answer is D on edginuity.

Explanation:

Answer:

C

Explanation: Study Island

Answer:

The Straight Line Graph

Explanation:

The MOST likely that makes this study difficult to conduct accurately is the fact that researchers might interpret the subjects’ movements differently. Accuracy is fundamental in experimentation.

Accuracy in an experiment refers to how close the final result of an experimental procedure is to a value considered as correct or accepted.

For example, accuracy can be how close is a given measurement in an experimental procedure.

Accuracy can be affected by human error (e.g., different persons can exhibit different methodologies to obtain a measurement).

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Answer:

Researchers might interpret the subjects' movements differently.

Explanation:

The change in entropy δs1 of the lava is not given in the question.

Entropy is a measure of the amount of energy in a system that is unavailable to do work. The change in entropy of a system is related to the amount of heat added or removed from the system and the temperature at which the heat transfer occurs.

In the case of the lava cooling to 700.0°C before solidifying, we would need to know the amount of heat lost by the lava and the temperature at which this heat transfer occurred in order to calculate the change in entropy. Without this information, we cannot determine the value of δs1.

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A pulsar is a neutron star that sweeps a beam of radiation past the Earth each time it rotates. So, option D is correct.

A pulsar is a highly magnetized, rotating neutron star that emits beams of electromagnetic radiation. It is formed from the remnants of a massive star that has undergone a supernova explosion.

As the neutron star spins rapidly, its intense magnetic field causes beams of radiation to be emitted from its magnetic poles. These beams are observed as regular pulses of radiation as the pulsar rotates.

Pulsars are characterized by their precise and regular periods of pulsation, which can range from milliseconds to several seconds.

The emission of radiation occurs along the magnetic axis of the neutron star, and if this axis is not aligned with the rotation axis, the beams of radiation sweep across space like a lighthouse, leading to periodic pulses of radiation detected on Earth.

The discovery of pulsars in 1967 by Jocelyn Bell Burnell and Antony Hewish provided evidence for the existence of neutron stars and opened up new avenues for studying stellar remnants and extreme astrophysical phenomena.

Pulsars are important objects in astrophysics and continue to be studied for their contributions to our understanding of stellar evolution, gravity, and the behavior of matter under extreme conditions.

So, option D is correct.

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Answer:

   (3) the same before and after the collision

Explanation:

The sum of products of mass and velocity before the collision is ...

  (2 kg)(0.250 m/s) + (2 kg)(0 m/s) = 0.50 kg·m/s

The sum of products of mass and velocity after the collision is ...

  (2 kg +2 kg)(0.125 m/s) = 0.50 kg·m/s

The total momentum is unchanged.

To count the number of valence electrons, you need to determine the group number of the element in the periodic table and sum up the valence electrons for all atoms in the molecule or ion.

The Lewis structure is a representation of the molecule or ion, showing the arrangement of atoms and valence electrons. The central atom is usually the least electronegative element or the one with the highest valence. To determine the electron geometry, you consider the arrangement of electron groups (bonded and lone pairs) around the central atom using the VSEPR theory.

Counting the number of valence electrons: Look at the periodic table and find the group number of each element in the molecule or ion. The group number represents the number of valence electrons. For example, carbon (Group 14) has 4 valence electrons, oxygen (Group 16) has 6 valence electrons, etc. Sum up the valence electrons for all atoms to get the total number of valence electrons.

Drawing the Lewis structure: The Lewis structure is a visual representation of a molecule or ion that shows the arrangement of atoms and valence electrons. Start by connecting the atoms with single bonds. Distribute the remaining valence electrons as lone pairs around the atoms, following the octet rule (except for hydrogen, which only needs 2 electrons). Aim to minimize formal charges and achieve stability.

Determining the central atom: The central atom is usually the least electronegative element or the one with the highest valence. Carbon is often a central atom, but other elements like nitrogen or oxygen can also be central depending on the molecule or ion.

Determining the electron geometry: To determine the electron geometry, use the Valence Shell Electron Pair Repulsion (VSEPR) theory. Count the total number of electron groups around the central atom. Electron groups can be bonded pairs (atoms connected by single, double, or triple bonds) or lone pairs.

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Answer:V=13500m/s

As

V=fλ

Where v is velocity, f is frequency and λ is the wavelength

f=27hz or 27/s

λ=0.50km=0.50*1000m=500m

Putting given values in the formula

V=(27/s)*(500m)

V=13500m/sss

v_a = 178.74 m/s

using Bernoulli's theorem :-

P_a + ½ρ(v_a)² = P_b + ½ρ(v_b)²

Where;

P_a is pressure above wings

P_b is pressure below wings

v_a is speed above wings

v_b is speed below wings

ρ is density of air

We want to find V_a, so let's make V_a the subject;

v_a = √[(2(P_b - P_a)/ρ) + (v_b)²]

Now, we don't know (P_b - P_a)

(P_b - P_a) = Force/Area

(P_b - P_a) = mg/Area

We are given m = 2.5 × 10^(6) kg and area = 1600 m²

Thus, (P_b - P_a) = (2.5 × 10^(6) × 9.81)/1600 = 15328.125 N/m²

Density of air will be taken as 1.2 kg/m³

Thus;

v_a = √[(2(15328.125)/1.2) + (80)²]

v_a = √31946.875

v_a = 178.74 m/s.

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Explanation:

In a parallel circuit, each lamp is connected to the power source independently, meaning that the lamps are not directly connected to each other. Therefore, if one lamp filament breaks in this setup, the other three lamps will continue to work unaffected.

When the filament of one lamp breaks, it essentially opens the circuit for that particular lamp. However, the remaining lamps are still connected in parallel, so the current can flow through them independently. The other lamps will continue to receive electricity from the power source and light up normally.

This behavior is a characteristic of parallel circuits, where each component has its own individual connection to the power source. If the lamps were connected in series, the situation would be different. In a series circuit, a break in one lamp's filament would interrupt the flow of current throughout the entire circuit, and all the lamps would go out.

An object of mass m to covers 2000m max vertical distance from the ground thrown at the velocity of 197 m/s

Velocity is "rate of change of displacement with respect to time".

i.e. v= dx/dt

it is also defined as displacement over time. i.e. v=Displacement/Time.

Velocity shows how much distance can be covered in unit time. It's SI unit m/s.

Acceleration is rate of change of velocity with respect to time.

i.e. a = dv/dt

if an object changes its velocity in short time, we can say that it has grater acceleration.

a= dv/dt =Δv/Δt = \(\frac{v_{2} - v_{1}}{t_{2} - t_{1}}\)  

where    v₂= initial velocity

              v₁= final velocity

              t₂= initial time

              t₁ = final time  

Given,

Distance = 2000m

Acceleration due to gravity 10 m/s²

By the equation of kinematics,

v² = u² + 2as....... 1)

where v = final velocity

           u = Initial velocity

           a = acceleration

           s = distance

in this case when an object of mass m is thrown vertically it attains max distance at that point final velocity becomes zero. We are performing this experiment on earth so our acceleration will be acceleration due to gravity g.

ie. v=0 and a = g

equation 1) becomes

0=u² + 2×9.8×2000

u²+ 39200 = 0

u = √39200 = 197 m/s

u= 197 m/s

Hence calculated velocity with which it was thrown is 197 m/s

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Given,

From the graph, the total displacement of the given object is d=0-7=-7 m

The total time duration, t=12 s

The average velocity is defined as the ratio of the total displacement to the total time duration.

Thus the average velocity of the given object is,

On substituting the known values,

Thus the average velocity of the given object from t=0 s to t=12 s is 0.583 m/s.

Answer:

59.18 kg

Explanation:

use f=ma

f= 580 N

a = 9.8 m/s 2

weigh(m) doesn't change only force(F) changes

Answer: 219.6N

Explanation:

Find the mass of this person by dividing his weight by the accelleration. Remember, F=ma

580 = m*9.8

m = 59.18kg

Then multiply the mass by the new gravitational acceleration on Mars.

59.18*3.711 = 219.6N

Answer:

7500 Newtons

Explanation:

Mass of the sportscar= 1500 kg

Acceleration of the sportscar= 5m/s^2

Hence, let the Force acting on it be F

\(We\ know\ that,\\Force=Mass*Acceleration\\F=ma\\\\Here,\\F=1500*5\\=7500 kg m/s^2\ or\ 7500\ Newtons\)

Explanation:

s = ut + 1/2at²

= 0(10) + 1/2×6.6×(10)²

= 3.3 × 100

= 330 m

The minimum and maximum braking distances needed to ensure that all vehicles traveling at the posted speed limit can stop before reaching the intersection are as follows:

- For small cars: Minimum ≈ 1773.028 m, Maximum ≈ 1568.850 m

- For large trucks: Minimum ≈ 3285.760 m, Maximum ≈ 2409.595 m

To calculate the minimum and maximum braking distances, we can use the equations of motion for a decelerating vehicle.

The equation for the braking distance of a vehicle is given by:

d = (v^2) / (2 * μ * g)

where d is the braking distance, v is the initial velocity of the vehicle, μ is the coefficient of friction between the tires and the road, and g is the acceleration due to gravity.

Let's calculate the minimum and maximum braking distances separately for small cars and large trucks.

For small cars with a mass of 563 kg:

- Minimum braking distance:

  v = 8989 km/h = (8989 * 1000) / 3600 m/s = 2496.944 m/s

  μ_min = 0.536

  d_min = (v^2) / (2 * μ_min * g) = (2496.944^2) / (2 * 0.536 * 9.8) ≈ 1773.028 m

  Maximum braking distance:

  μ_max = 0.599

  \(d_max = (v^2) / (2 * μ_max * g) = (2496.944^2) / (2 * 0.599 * 9.8) ≈ 1568.850 m\)

For large trucks with a mass of 3951395 kg:

- Minimum braking distance:

  v = 8989 km/h = 2496.944 m/s (same as for small cars)

  μ_min = 0.350

 \(d_min = (v^2) / (2 * μ_min * g) = (2496.944^2) / (2 * 0.350 * 9.8) ≈ 3285.760 m\)

  Maximum braking distance:

  μ_max = 0.480

 \(d_max = (v^2) / (2 * μ_max * g) = (2496.944^2) / (2 * 0.480 * 9.8) ≈ 2409.595 m\)

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Answer:

A: 2.8 * 10^(-14) J

Explanation:

Formula to find the energy is;

E = hc/λ

Where;

E is energy of a photon (E)

λ is wavelength of the light

c is speed of light

Thus;

E = (1.99 *10^(-25))/(7 * 10^(-12))

E = 2.8 * 10^(-14) J

At high speeds, gas vibrates and moves freely. The liquid vibrates, moves about, and slides past one another. Solids vibrate (jiggle) but do not move from one location to another.

Answer:

It is cause by radiation that's the answer

Explanation: the heat project sun rays towards the popcorn which causes it to pop

The first-order coherence function for the cat state |ψ⟩ = (|α⟩ + |−α⟩)/√2 is a constant, indicating perfect coherence. The second-order coherence function exhibits oscillations with a period of 2α, reflecting the interference between the two components of the cat state.

To derive the first and second-order coherence functions for the cat state |ψ⟩ = (|α⟩ + |−α⟩)/√2, we need to calculate the corresponding correlation functions.

The first-order coherence function is given by:

g^(1)(τ) = ⟨a†(t + τ)a(t)⟩ / ⟨a†(t)a(t)⟩

where a†(t) and a(t) are the creation and annihilation operators at time t, respectively, and τ is the time delay.

For the cat state, the first-order coherence function is a constant and equals 1. This indicates perfect coherence between the two components of the cat state.

The second-order coherence function is given by:

g^(2)(τ) = ⟨a†(t)a†(t + τ)a(t + τ)a(t)⟩ / (⟨a†(t)a(t)⟩)^2

For simplicity, assuming a large value of α, we can neglect the time dependence of the operators and approximate them as constants. Using the commutation relations for the creation and annihilation operators, we can simplify the expression for the second-order coherence function.

The second-order coherence function for the cat state exhibits oscillations with a period of 2α, reflecting the interference between the two components of the cat state. These oscillations indicate the presence of quantum coherences in the system.

Comparing the coherences, the first-order coherence function is constant, indicating perfect coherence between the components of the cat state. On the other hand, the second-order coherence function shows oscillations, representing the interference between the components. These coherences provide important information about the quantum nature of the cat state and can be experimentally measured to study its properties.

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Answer:

I think the answer is c

Explanation:

I had this problem once

According to given information to find the weight of the car, we can use the concept of pressure and area. The car weighs approximately 4.8 x 10³ N.

1. The absolute pressure in each tire is given as 2.0 x 10⁵ Pa.
2. The area of each tire in contact with the ground is given as 0.024 m².

To calculate the weight of the car, we can use the formula:

Pressure = Force / Area

Rearranging the formula, we have:

Force = Pressure x Area

Now, let's plug in the values:

Force = (2.0 x 10⁵ Pa) x (0.024 m²)

Multiply the values:

Force = 4.8 x 10³  N

Therefore, the weight of the car is approximately 4.8 x 10³  N.

Conclusion ,The car weighs approximately 4.8 x 10³  N.

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Answer:

The distance of the light is 9.4608 x 10^25 m

Explanation:

Time taken by the light = 10 billion years = 10 x 10^9 years

speed of light = 3 x 10^8 m/s

speed of light in m/years is = (3 x 10^8)/(60 x 60 x 24 x 365) = 9.4608 x 10^15 m/year

distance = speed x time

therefore, the distance of this light = 10 x 10^9 x 9.461 x 10^15 = 9.4608 x 10^25 m

Answer:  

more than 10 billion light years due to expansion of space

Explanation: