An energy input of 33.44kJ is required to raise the temperature of 100 grams of water from room temperature (20°C) to boiling temperature (100°C). How many photons of energy are needed to bring 250 grams of room temperature water to boiling if 288 mili-meter electro-magnetic radiation is used to heat the water?

Assumption :

- The process is adiabatic

- Heat from electric kettle is constant

- Efficiency of electric kettle is 100%

Q = m • c • ∆T

P • t = m • c • ∆T

2400t= (4.5 kg)(4200 J/kg°C)(100°C - 28°C)

2400t = 1360800

t = 567 s

t = 9.45 min

A light-rail commuter train accelerates at a rate of 1.40 m/s2, it take 15.17s to reach its top speed of 76.5 km/h, starting from rest.

When describing the motion of the objects in terms of distance, time, and direction, physicists use the basic quantities of speed and velocity. Two terms and two distinct meanings. Yet, not uncommonly, we hear these terms used in interchangeably. So, what is the difference? Why is it incorrect to use terms speed and velocity interchangeably?

The reason is very simple. Speed is time rate at which an object is moving along a path, while velocity is the rate and direction of an object’s movement. Put another way, the speed is a scalar value, while velocity is a vector.

The mathematical calculation for speed is relatively straightforward, wherein the average speed of an object is calculated by dividing the distance traveled by the time it took the object to travel distance. Velocity, on the other hand, is more complicated mathematically and can be calculated in different ways, depending on what information is available about object’s motion. In its simplest form, average velocity is calculated by dividing change in position (Δr) by change in the time (Δt).

The formula to find the acceleration is:

\(a=\frac{v-u}{t}\\ t=\frac{v-u}{a}\\\\ =\frac{21.25-0}{1.40} \\\\ =15.17\)

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Answer:

Newton's first law of Inertia.

Explanation:

This explains how a magician is able to remove a tablecloth from under dishes and glasses on the table without disturbing them. Because of the mass of the object, it remains in inertia. The Tablecloth, in this trick, is slippery so that it does not have any real friction with glasses and dishes.

Answer:

it is d all of the above your welcome

The greatest distance above or below the ecliptic the moon can move is about 5.14 degrees.

The ecliptic is the plane of Earth's orbit around the Sun. The moon's orbit is inclined to the ecliptic by about 5.14 degrees. This means that at its maximum inclination, the moon can be approximately 5.14 degrees above or below the ecliptic plane. This variation is known as the lunar inclination. The moon's inclination can influence the occurrence of eclipses, as it needs to align closely with the ecliptic for solar and lunar eclipses to take place. Understanding the moon's orbital inclination is essential for studying celestial events and predicting their visibility from Earth.

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The electron and nucleus interact electrostatically, acting as a centripetal force. As the electron's velocity is tangential and this force is radial, it is perpendicular to the electron's motion and consequently has no effect on the electrons' kinetic energy.

The electron is a subatomic particle with the symbol or an electric charge of one elementary negative charge. Due to their lack of known components or substructure, electrons, which are part of the lepton particle family's first generation, are typically considered elementary particles. The mass of an electron is around 1/1836 that of a proton. In terms of the decreased Planck constant, the electron intrinsic angular momentum (spin) has a half-integer value. The Pauli exclusion principle states that because electrons are fermions, they cannot share the same quantum state. Electrons, like all elementary particles, have characteristics of both particles and waves: they can collide with other particles and can be diffracted like light.

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Answer:

4727.71N

Explanation:

Given parameters:

Acceleration due to gravity on Venus  = 8.87m/s²

Mass of the rover = 533kg

Unknown:

Weight of the rover  = ?

Solution:

Weight is the force of gravity acting on a body. It is mathematically expressed as;

 Weight  = m x g

m is the mass

g is the acceleration due gravity

 Insert the parameters and solve;

 Weight  = 533 x 8.87  = 4727.71N

Answer:

We can use Coulomb's law to solve this problem:

F = k * q1 * q2 / r^2

where F is the force between the two charges, k is Coulomb's constant (k = 9 x 10^9 N m^2 / C^2), q1 and q2 are the magnitudes of the charges, and r is the distance between them.

We know the force F, the distance r, and the magnitude of one of the charges q1. We can rearrange the equation to solve for the magnitude of the other charge q2:

q2 = F * r^2 / (k * q1)

Substituting the values we have:

q2 = (250 N) * (0.15 m)^2 / (9 x 10^9 N m^2 / C^2 * 6.5 x 10^-5 C)

Simplifying:

q2 = 8.65 x 10^5 C

Therefore, the magnitude of the other charge is 8.65 x 10^5 C.

The type of system that utilizes sensors to detect tire slippage during acceleration is the Traction Control system.

The Traction Control system (TCS) with help of these wheel speed sensors to measures the vehicle's speed along with the rate of speed at which the drive wheels are rotating, to detect and analyze if there is any slip taking place in between the tire and the road.

This system places piggybacks on the antilock brake system (ABS) to detect and capture tire slip during acceleration and maintain the movement traction while accelerating.

Furthermore, the advantages of the Traction Control system are

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Answer:

Particles move rapidly in all directions but collide with each other more frequently than in gases due to shorter distances between particles. With an increase in temperature, the particles move faster as they gain kinetic energy, resulting in increased collision rates and an increased rate of diffusion

Explanation:

Answer: SI unit of pressure

Explanation: The pascal (pronounced pass-KAL and abbreviated Pa) is the unit of pressure or stress in the International System of Units (SI). Reduced to base units in SI, one pascal is one kilogram per meter per second squared; that is, 1 Pa = 1 kg · m-1 · s-2.

Hope this helps! Have a fantastic rest of ur day, luv!

Answer:

V initial = 0 m/s

V final = 13 m/s

Time = 10 s

Vf - Vi / T =

13-0/10 =

1.3 m/s^2

Explanation:

Hey<3

Answer:

y=4.3 × 10 raise to power -16 m

Answer:

I would say that your best answer would be C.

I'm not too sure about this, but it's the best answer on there

Explanation:

Hope this helps you.

C. They can be bonded together to create different substances.

Elements are the simplest substances that can get without losing their properties. They can be found on the periodic table.

To help answer this question we can break down each answer choice.

Choice A

Answer A cannot be correct simply because of the definition of an element. A substance of a pure element cannot be broken down into any simpler substance. The only thing beyond an element is subatomic particles like protons and electrons, which are not considered substances. So elements are the simplest substances that exist.

Choice B

Many elements are found in nature. It would be impossible to live if elements were not naturally occurring. For example, oxygen is an element. Oxygen is found naturally in the atmosphere and is replenished by photosynthesis and the carbon cycle. Additionally, all life is carbon-based, so of course, carbon is also naturally occurring.

Choice C

Chemical compounds and substances surround us every day. Just as we need oxygen to breathe, carbon dioxide is also an important part of life. Carbon dioxide is a substance created by the bonding of carbon and two oxygen atoms when we breathe out. So, it is true that elements can be boned to create substances.

Choice D

As stated in the explanation for choice B, elements can be found naturally. There are some elements created in a lab like Technetium, but others such as sulfur and oxygen are not created in labs.

The steady-state speed that can be achieved with a maximum drive power of 1.0 MW is approximately 9.73 m/s.

To determine the steady-state speed that can be achieved with a maximum drive power of 1.0 MW (megawatt), we need to consider the driving resistance and the available power.

Given information:

Mass of the locomotive (m1): 50 tonnes = 50,000 kg

Mass of each car (m2): 15 tonnes = 15,000 kg

Number of cars (n): 20

Gradient of the track (θ): 2% = 0.02

Friction coefficient (μ): 1%

Gravitational acceleration (g): 9.81 m/s^2

Maximum drive power (Pmax): 1.0 MW = 1,000,000 W

First, let's calculate the total mass of the train:

Total mass (M) = Mass of locomotive + Mass of cars

M = m1 + (m2 × n)

M = 50,000 kg + (15,000 kg × 20)

M = 50,000 kg + 300,000 kg

M = 350,000 kg

Next, we can calculate the driving resistance:

Driving resistance (R) = Gravitational resistance + Rolling resistance

Gravitational resistance (Rg) = M × g × sin(θ)

Rolling resistance (Rr) = μ × M × g × cos(θ)

R = Rg + Rr

Substituting the given values:

Rg = 350,000 kg × 9.81 m/s^2 × sin(0.02)

Rr = 0.01 × 350,000 kg × 9.81 m/s^2 × cos(0.02)

R = Rg + Rr

Calculate Rg:

Rg = 350,000 kg × 9.81 m/s^2 × sin(0.02)

Rg ≈ 350,000 kg × 9.81 m/s^2 × 0.02

Rg ≈ 68,430 N

Calculate Rr:

Rr = 0.01 × 350,000 kg × 9.81 m/s^2 × cos(0.02)

Rr ≈ 0.01 × 350,000 kg × 9.81 m/s^2 × 0.9998

Rr ≈ 34,267 N

Calculate R:

R = Rg + Rr

R ≈ 68,430 N + 34,267 N

R ≈ 102,697 N

Now, we can calculate the maximum velocity (vmax) using the maximum power available:

Power (P) = Force (F) × Velocity (v)

P = R × v

vmax = Pmax / R

Substituting the given values:

vmax = 1,000,000 W / 102,697 N

vmax ≈ 9.73 m/s

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Answer:

Electricity is the set of physical phenomena associated with the presence and motion of matter that has a property of electric charge. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by Maxwell's equations.

The ability to see the world in three dimensions is called depth perception. It is the visual ability to perceive the relative distance of objects in space and to see them in three dimensions.

Depth perception is an important aspect of vision that allows us to accurately judge distances, perceive spatial relationships, and interact with our environment.

It is the result of the brain processing information from both eyes to create a single, three-dimensional image.

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Astronomers would use a technique called "redshift" to determine the distance to a remote quasar.

Redshift is the phenomenon of an object's light or other electromagnetic radiation shifting to longer wavelengths as the object moves away from an observer. This shift is used to calculate the relative speed of the quasar and its distance from Earth.

A quasar is a supermassive black hole in the center of a distant galaxy that consumes gas. Since astronomers first discovered quasars in 1963 as objects that looked like stars but emitted radio waves, the term "quasar" stands for "quasi-stellar radio source."

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Answer:

These terms are crucial to understanding the unit. axle.

a pin or pole around which a wheel revolves. complex machine any device made up of more than one simple machine;

a compound machine. force.

the strength or energy that moves an object. ...

each other. ...

the point around which a lever pivots or turns. ...

machine. ...

simple machine.

To determine the value of c2−4mk, we need to use the given values and equations.Given: m = 4 kg (mass), k = (7.5 N / 1.5 m) = 5 N/m (spring constant), c = 4 (damping constant)

Using these values, we can calculate c2−4mk as follows:
c2−4mk = (4)2 - 4(5)(4) = 16 - 80 = ... (final result)
To find the position of the mass after it is released with zero velocity, we can use the equation of motion for a damped harmonic oscillator:
x(t) = A * e^(-ct/2m) * cos(√(k/m - c^2/4m^2) * t + φ)
In this case, the mass is released with zero velocity, which means the initial conditions are:
x(0) = 3 m (initial displacement)
v(0) = 0 m/s (initial velocity)
Using these initial conditions and the given values, you can substitute them into the equation to calculate the position of the mass at any given time. The phase angle φ can be determined based on the specific initial conditions.

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Answer: 1702.8 km/h

Explanation:

The speed of the molecule in kilometers per hour (km/h) will be, {473x(3600÷1000)} km/h

= 1702.8 km/h

When Car A moving at 30 m/s to the north and Car B moving at 15 m/s to the south collide Car A applies a greater force on car B than car B applies on car A.

p = m v

p = Momentum

m = Mass

v = Velocity

For car A,

m = 1000 kg

v = 30 m / s

p = 1000 * 30

p = 30000 kg m / s

For car B,

m = 1000 kg

v = 15 m / s

p = 1000 * 15

p = 15000 kg m / s

F = dp / dt

Force can also said as the rate of change of momentum. Since the momentum of car A is higher than that of car B, the force applied by car A on car B will he higher

Therefore, car A applies a greater force on car B than car B applies on car A.

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Answer:

16

Explanation:

The 8-meter telescope has 16 times the light-collecting area of the 2-meter telescope.

The light-collection area of the 8-meter telescope is 16 times greater than that of the 2-meter telescope.

A telescope is a tool to view distant objects through the electromagnetic radiation to view distant objects through electromagnetic radiation that they emit, absorb, or reflect. The term "telescope" now refers to a broad range of instruments capable of detecting various regions of electromagnetic radiation, and in some cases other types of detectors, in addition to the original meaning of the word, which was only an instrument used to see objects using lenses, reflective surfaces, or a combination of both, to observe distant objects.

Telescopes using glass lenses were the first practical telescopes ever made, and they were developed in the Netherlands at the start of the 17th century. They were employed in astronomy and terrestrial applications.

The first refracting telescope was created several decades before the plane mirror, which employs mirrors to gather and focus light.

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Answer:

inverse-square law.

Explanation:

Since the area increases as the square of the distance, the brightness of the light must decrease as the inverse square of the distance.

hope this helped you!

Answer:

C

Explanation:

In order to find the magnitude of the electric field at the origin, you need to use the equation E = q/4πεr², where q is the charge, ε is the permittivity of space, and r is the distance from the origin.

To calculate the electric field, you must first determine the charge of the particle, then determine the distance to the origin, and finally, use the equation to calculate the magnitude of the electric field.

Once you have the magnitude of the electric field at the origin, you can then use it to explore the behavior of other electric fields in the area.

To calculate the magnitude, you must first determine the values of k, q, and r, then plug them into the equation and solve. The resulting answer will be the magnitude of the electric field at the origin.

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An ideal battery is a source of fixed EMF and voltage. An ideal battery is a theoretical construct that is used to understand how batteries work. It is a model that assumes that a battery has no internal resistance and that its voltage does not change with time.

In this idealized scenario, a battery is a source of fixed electromotive force (EMF) and voltage. The EMF is a measure of the battery's ability to produce electrical energy, while the voltage is the measure of the potential difference between the two terminals of the battery. In an ideal battery, the voltage is constant and does not depend on the amount of current that is drawn from it. This means that an ideal battery can deliver a constant amount of energy over an extended period of time.

While an ideal battery is not a real device, it is a useful tool for understanding the behavior of real batteries. In real batteries, there is always some internal resistance that causes the voltage to drop as current is drawn from the battery. This means that the actual voltage of a battery depends on the amount of current that is being drawn from it. Moreover, the voltage of a real battery decreases over time as the battery discharges. Nevertheless, the concept of an ideal battery is helpful in understanding the principles of battery operation and in designing practical battery systems that can deliver reliable and consistent performance.

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"You manage to charge one end of an isolated object, but not the other. Then it is an insulator."

In general, metals are excellent conductors, allowing current to travel freely. Insulators are substances that restrict the ease with which current can travel. The majority of non-metal elements, including rubber, plastic, and wood, are insulators. If you've ever plugged something into a wall outlet, you'll observe this.

Yes, rubbing them together will power the insulator. For this reason, anything that loses electrons becomes positively charged, and anything that acquires electrons becomes negatively charged.

Charging by induction is the process of bringing a charged item close to an uncharged object while avoiding physical contact.

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