. Johnathan road his bicycle up a hill at a velocity of 17.15 m/s. Johnathan and his bicycle had
a combined mass of 88 kg. What was the height of the hill?

Answer: the last one

Explanation: i did this before lol

Wext is negative So energy is transferred from the system to the environment.

What is Work Done?

Energy can be transferred by the use of force. Work done refers to the amount of energy used by a force to move an object. As a result, there is a direct connection between Work and Energy.

The sum of the displacement and the component of the applied force of the object in the displacement direction is the work done by a force.

Using energy conservation

Ki + Ui + Wext = Kf + Uf + dEth

Using given values in graph

4 + 1 + Wext = 1 + 2 + 1

Wext = 4 - 5

Wext = -1 J

Since Wext is negative So energy is transferred from the system to the environment.

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The value of Fmax = 10-³/2 N

Fmax = 500N

Explanation:

Impulse is the area under force curve

The ramp up and down each have area 1/2*base*height

= 1/2 *2ms*Fmax areas for the combined area (2ms)Fmax

The middle rectangle has area = base * height

= (4ms)Fmax

So, total (6ms)Fmax is equal to 3Ns

Fmax = 3Ns/6ms = 10^3 /2 N

Fmax = 1000/2 = 500N

The value of Fmax gives an impulse of 9.0 Ns is found to be 2.25N

The term "impulse" describes how much of an influence a force has overall over the course of time. J = F t for a constant force. The continuous net force applied on an object throughout time and its duration are both factors that affect impulse.

For a constant force, J = F ⋅ Δ t

Impulse J => 9 Ns

F max at given impulse = 9/Δ t => 9/(6-2)

                                                     => 2.25N

F stands for the applied resultant force, t1 and t2 for the start and end of the impulse, respectively, m for the object's mass, v2 for the object's ultimate velocity at the conclusion of the time interval, and. When the time interval starts, the object's starting velocity is v1.

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According to the question,  the wire will be 20.00034 m long when the temperature is 24°C.

What is temperature?
Temperature is a measure of the average kinetic energy of the particles in a substance. It is typically measured in degrees Celsius, Fahrenheit, or Kelvin. Temperature is an important physical property as it can affect the state of a substance and the rate at which reactions occur. At a given pressure, the temperature of a substance determines its phase.

If the temperature increases to 24°C, the length of the wire will change. Copper is a metal that expands when heated, so the wire will increase in length and become longer. According to the coefficient of linear expansion of copper, the wire will increase in length by 0.000017 m/°C. Therefore, the wire will be 20.00034 m long when the temperature is 24°C.

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Momentum is used to create baseball bats by swinging them with force and power to build up momentum.

What is Momentum ?

Momentum is a concept in physics that describes the tendency of an object in motion to remain in motion. It is a measure of an object’s momentum, which is the product of its mass and velocity.

Momentum is a vector quantity, which means it has both magnitude and direction. Momentum is conserved, meaning that the total momentum of all objects in a closed system remains constant. Momentum is an important concept in classical mechanics, and its conservation has important implications for how objects interact.

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α decay:

217  At    ​→        4 α  + 213 Bi

85                    2          83

β decay:

213 Bi     →       0 e  +  213 Po

83                   -1           84

α decay:

213 Po    →        4 α  + 209 Tl

84                    2           82

β decay:

209 Tl     →        0 e  + 209 Pb

82                    -1          83

What occurs when radioactive material decays?

A radioactive atom will naturally emit radiation in the form of energy or particles in order to transition into a more stable state. The difference between radioactive material and the radiation it emits must be made. Radioactivity types: beta, gamma, and alpha decay.

A typical type of radioactive decay known as "alpha decay" occurs when a nucleus emits an alpha particle (a helium-4 nucleus). A nucleus emits beta particles during the typical radioactive decay process known as beta decay. The offspring nucleus will be more atomically massive than the parent nucleus.

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The amount of mercury needed to fill a 0.250-L flask is 3.38 kg.

The correct option is A.

An object's inertia, or barrier to a change in motion, is quantified by its mass. It is a basic physical characteristic that is measured in kilograms (kg), grams (g), and pounds (lbs) (lbs). Any item's mass is just an intrinsic feature, which means it measures the physical characteristics of the thing without taking into account outside factors. The relationship between mass and other physical characteristics like density, force, and speed is a common one in scientific calculations.

To do so, first convert the volume of 0.250 L supplied to cubic centimeters (cm3), which is equal to 250 cm3. To acquire 3375 g of mercury, multiply this amount by the density of mercury, which is 13.5 g/mL.

Density of water = 1   (1 g / ml)

.25 L = 250 ml   (milleters)

mass of flask = 250 ml * 1 g / ml = 250 g     (water to fill flask)

Equivalent mass of Hg = 13.5 * 250 g = 3375 g = 3.38 kg

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Both an electric field and a magnetic field can deflect a beam of charged particles

A magnetic field is any region or space where a magnetic force can be felt. The magnetic field strength is also known as magnetic field.

When a beam of charged particles pass through the magnetic field, the beam of the charged particle will be deflected by moving in a circle.

But when a beam of charged particles pass through the electric filed, the beam of charged particles will be deflected by moving in a parabolic path.

Therefore, a beam of charged particles can be deflected by both an electric field and a magnetic field.

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The magnitude and direction of the resultant force (F=10N+5N+4N+6N) when four forces of magnitude 10N, 5N, 4N, and 6N operate on an object in the directions of north, west, east, and south, respectively, is 25N.

In terms of physics, magnitude is just "distance or quantity." It displays an object's size, direction, or motion in absolute or relative terms. It is employed to indicate the size or scope of something. The word "magnitude" in physics frequently denotes a size or quantity.. Something's magnitude is determined by its size. For example, a car moves faster than a bike with terms of speed. The speed difference between the car and the bike in this case is greater. It reveals the absolute or relative size or direction that an object moves when in motion.

Speed is defined as the magnitude of velocity, and the magnitude of the slope of the displacement-time graph provides the speed. Since the slope gets steeper as we move from A to B, Speed is increased as a result between points A and B.

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Answer:

Focal length (f) = 1/2 (Object distance + Image distance)

f = 1/2 (12.2 cm + 25.0 cm)

f = 18.6 cm

Answer:

B

Explanation:

How to find the average:

Step 1.) Add all the numbers

Step 2.) Divide the total from all the number by how many numbers there are.

Ex:

23+29+24+24+25

=125

125÷5= 25

Answer: 25

Explanation:

The compass felt the magnetic field around wire where current flows in upward direction. The vector direction of magnetic field around wire (current ON) according to thumb rule is anti-clockwise.

A wire develops a ring-shaped magnetic field as current flows through it. This magnetic field has the ability to divert the needle of a magnetic compass. Closer to the wire, the magnetic field is stronger, and its strength grows as the current does as well. This magnetic field is a result of the circular wire's current flow, and the circular wire's centre has straight magnetic field lines. By using the right hand thumb rule, the magnetic field's direction can be determined.

it is as a result of the magnetic field that is created when current is transferred through a current-carrying conductor.

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In the Doppler effect, the frequency, wavelength, and wave speed of sound or light waves can change depending on the relative motion of the source of the waves and the observer.

When the source of the waves is moving toward the observer, the frequency of the waves will appear to be higher than the actual frequency, and the wavelength will appear to be shorter. This is referred to as a "blue shift".

Conversely, when the source of the waves is traveling away from the observer, the wavelength will appear to be longer and the frequency will appear to be lower than it actually is. This is referred to as a "redshift."

The Doppler effect, however, does not alter the wave speed, which stays constant.

It is significant to remember that the Doppler effect affects not only sound waves but also electromagnetic waves like light waves. The Doppler shift is another name for the Doppler effect.

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The critical temperature of water is 374.15°C (705.37°F).

Temperature is a measure of the degree of hotness or coldness of an object or environment. It is measured using a thermometer, which records the temperature in either Celsius or Fahrenheit. Temperature is an important factor in determining the climate of an area and can affect many aspects of life. Temperature also affects the rate of chemical reactions, and can be used to measure the kinetic energy of molecules. Temperature is an important factor in determining the properties of materials, and can influence how they behave.

The critical temperature of water is 374.15°C (705.37°F). At this temperature, water is neither a liquid nor a gas, and its properties are the same regardless of pressure.

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Answer:It might seem small, but atmospheric dust is a big deal. Consisting (mostly) of tiny pieces of metal oxides, clays and carbonates, dust is the single largest component of the aerosols in Earth's atmosphere, and it likely has a significant impact on the Earth's climate, as it effects a wide range of phenomena, including from temperatures in the Atlantic Ocean to the rate of snowmelt in the southwestern U.S. Dust may also affect hurricanes, as recent research based on data sets dating back to the 1950s suggests an inverse relationship between dust in the tropical North Atlantic and the number of Atlantic hurricanes during the past several decades.

Explanation:

The article "Sunrise, Sunset...or Not?" by ReadWorks has a more formal tone compared to "The Ever-Changing Sky" by Megan McGibney.

In "Sunrise, Sunset...or Not?" the author uses scientific and technical terms such as "counterclockwise," "Arctic Circle," and "phenomenon," and provides a detailed explanation of the scientific reasoning behind the rising and setting of the sun.

In contrast, "The Ever-Changing Sky" by Megan McGibney has a more casual tone, using more colloquial language such as "clear day," "bright and shiny," and "People have always looked up at the sky with wonder." The author also uses phrases like "guess how long" and "right!" which implies that the author is addressing a less formal audience and is being conversational.

In all, "Sunrise, Sunset...or Not?" has a more formal tone because of its use of technical language, explanation of scientific concepts, and a generally informative and explanatory writing style.

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Sunrise, Sunset...or Not?

by ReadWorks

The sun is a wonderful thing for Earth. It is a star that heats the planet and makes life on

Earth possible. In addition, its light shines onto the planet. It is Earth's ultimate source of

energy.

Summer days may be longer than winter days, but for most people, the sun seems to do the

same thing each day: it appears to come up in the east for the day, and it appears to go down

in the west for the night. The sun looks like it rises in the east and sets in the west because of

how the earth spins in space. It spins toward the east, or counterclockwise. This means that

when most people look at the sky in the morning, the sun will first appear in the east.

The earth takes 24 hours to complete one turn. For most places on Earth, there is a daytime

and nighttime every 24 hours. But in some places for many days at a time, the sun might stay

up in the sky, or it might not even come up above the horizon.

In some parts of the world, the sun can be up in the sky for months. During part of the spring

and summer in Earth's Northern Hemisphere, the Northern Hemisphere is tilted towards the

sun so much that the sun in northern Alaska, which is located in the Arctic Circle, never goes

below the horizon. The Arctic Circle is an area at the top of the earth. In Barrow, Alaska, the

sun doesn't set for almost three months! This phenomenon is called the midnight sun, when

the sun has not set at midnight. Try sleeping through that!

During parts of the fall and winter in Earth's Northern Hemisphere, the Northern Hemisphere

is tilted in such a way that the sun doesn't come over the horizon in northern Alaska for a little

over two months. Therefore, nights last more than 24 hours. This phenomenon is called the

polar night. Although the sun never rises above the horizon during parts of the fall and winter

in the Arctic Circle, enough light often shines so that people who live there don't need

The Ever-Changing Sky

The Ever-Changing Sky

by Megan McGibney

Look up at the sky on a clear day. You will see the sun. It is bright and shiny, warming much of

what its light touches. Look up at the sky again at night. You may see the stars. They are also

bright and shiny, glimmering in the dark sky. You may also see the moon. It looks bright and

shiny, reflecting light from the sun. People have always looked up at the sky with wonder.

Some have even studied the sun, moon, and stars. These people, called astronomers, have

learned that those objects in the sky do not stay in the same place all the time.

The Ever-Changing Sky

extra quarter of a day.

Let's take a closer look at the moon. The earth does not revolve around the moon. Instead,

the moon revolves around the earth. It takes the moon about four weeks to complete a

revolution around the earth. The portion of the moon we, here on Earth, see changes over

this period of about four weeks as the moon's position around the earth changes. The

moonlight we see at night is the moon's reflection of sunlight onto Earth. The different ways

the moon appears to us are known as the moon's phases. The moon's phases depend on the

moon's position in relation to the earth and the sun.

The four-week period starts and ends with the new moon. The new moon cannot be seen

because the side of the moon lit by the sun is facing away from the earth.

Use the articles "The Ever-Changing Sky" and "Sunrise, Sunset...or Not?" to answer

questions 6.

6. Which article has a more formal tone? Support your answer with details from both texts.

Answers will vary.

The acceleration of both points A and B can be determined from the given velocities and accelerations of the gear racks.

Point A:

x-component of acceleration = 0 m/s^2

y-component of acceleration = 6 m/s^2

Point B:

x-component of acceleration = 0 m/s^2

y-component of acceleration = -6 m/s^2

The acceleration of both points A and B can be determined from the given velocities and accelerations of the gear racks. The x-component of the acceleration of both points is equal to 0 m/s^2 since the gear racks are not moving horizontally. The y-component of the acceleration of both points is equal to 6 m/s^2 in the upward direction for point A, and -6 m/s^2 in the downward direction for point B. Therefore, the acceleration of point A is (0, 6) m/s^2 and the acceleration of point B is (0, -6) m/s^2.

The complete question is:

At a given instant, the gear racks have the velocities and accelerations shown.

Determine the acceleration of points A and B.

Enter the x and y components of the acceleration

the complete question is :

At a given instant, the gear racks have the velocities and accelerations shown ( attached below ).

Determine the acceleration of point A.

Enter the x and y components of the acceleration

Determine the acceleration of point B.

Enter the x and y components of the acceleration

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The initial energy stored in the capacitor is 1.5E+6 J and the initial current through the patient I= 25.0 A.

The initial energy stored in the capacitor can be found using the formula for energy stored in a capacitor U₀=1/2CV^2 Plugging in the given values, we get:

U₀=1/2*(50E-6F)*(6000V)^2

U₀=1.5E+6 J

(b) The initial current through the patient can be found using Ohm's law, which states that I = V/R. Plugging in the given values, we get:

I = 6000V/240Ω

I= 25.0 A

(c) The energy dissipated in the patient during the 1.0 ms can be found by multiplying the power by the duration. The power can be found using the formula:

P = IV = (25A)(6000V) = 150,000 W. So the energy dissipated is:

Energy = P * t

= 150,000W * 0.001s

Energy=150 J

(d) To compare the average power supplied by the power source with the average power delivered to the patient, we need to know the power of the power source. Since the capacitor is charged to 6.0 kV in 2.0 s, the power can be found by:

Power = (Energy) / (time)

= (1.5E+6 J) / (2.0s)

Power= 750,000 W

So, the average power supplied by the power source is 750 kW and the average power delivered to the patient is 150 W.

(e) A capacitor is used in a defibrillator to store a large amount of energy in a small package. The energy stored in the capacitor can be discharged quickly to provide a large current to the patient's heart to restore normal beating.

The capacitor also allows the defibrillator to deliver a high-energy shock without drawing a large current from the power source, which improves the safety of the device.

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On identifying aspects on the health pyramid, the statement "Physical health is a base of a health triangle and is the most essential part of the triangle" is inaccurate.

The triangle is just a three-sided polygon with three vertices. The triangle's internal angle, which is 180 degrees, is constructed. It implies that the internal angles in a triangle add up to 180 degrees. It is the polygon with the least amount of sides.

All of a triangle's angles measure below 90 degrees in an acute triangle. One of the triangle's angles is more than 90 degrees in an obtuse triangle. One angle of a right triangle is 90 degrees, while the other two are acute.

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A particular organic molecule forms an electric dipole,  the magnitude of the molecule's electric dipole moment

Generally, The magnitude of the electric dipole moment (p) is given by the product of the charge separation (d) and the magnitude of the charges (q):

p = dq

Therefore, the magnitude of the electric dipole moment of the molecule is:

p = (0.197 nm)(1.60 x 10^-19 C)

= 3.152*10^{-20}Cm

2) The magnitude of the torque (τ) that acts on the molecule in a uniform electric field (E) is given by the vector cross product of the electric dipole moment vector (p) and the electric field vector (E):

τ = p x E

The magnitude of the torque is given by the formula:

τ = pE sin(θ)

where

θ is the angle between the electric dipole moment vector and the electric field vector

Therefore, the magnitude of the torque that acts on the molecule in the given electric field is:

τ = (3.152 x 10^-29 Cm)(2.87 x 10^5 N/C) sin(29.5°)

= 4.45458171*10^{-24} Nm

3)The torque exerted on a dipole*in an electric field is dependent on the angle between the direction of the electric field and the dipole moment.

The torque is maximum when the angle between the direction of the electric field and the dipole moment is 90 degrees and the torque will be zero when it's parallel with the field.

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The bullet's final momentum is 0 m/s, hence the change in momentum is 100 000 m/s.

The product of an object's mass and velocity is changed, and this is known as the change in momentum (p). To alter an object's momentum, a force is needed. The momentum of the item may change due to the applied force, as well as its direction. A substance's rate of change in momentum is inversely proportional to the applied resultant force and moves in the same direction. Therefore, we can state that the force applied equals the rate of change of momentum. It is well known that mass times velocity equals momentum..

Keep in mind that the temporal rate of change of the total momentum is zero when there are no outside forces operating on the system. In other words, the total momentum of the system does not vary over time if the sum of the external forces is zero. In this situation, we say that the system's momentum is conserved.

Mass (m)=10cm=0.01kg. Time T=0.003s

Velocity v f=300m/s,v i=0m/s Acceleration (a)= 0.003

300

=100000m/s 2

∴Force=mass×acceleration

Or, F=(0.01)×(100000)=1000N.

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Answer: in kilowatt, 40,000 upon 1000 kilowatt, which is equal to 40 kilowatts.

Explanation: Here a car accelerates from rest to a velocity of 20 m/s In 10 seconds. And we have to find the power of the engine during this acceleration. So here we will use the work-energy theorem according to which work done is equal to the car's kinetic energy change. So work done by the engine is equal to half M V f squared minus V I square Mars is 2000. Could you? VF is the final velocity, which is 20 m/s, Initial Velocity VI is zero. So we get worked and equal to four into 10 to the power five jewels. Now power will be equal to work done by time. So work done is the 90s 10 seconds. So power is 40 1000 And in kilowatt, 40,000 upon 1000 kilowatt, which is equal to 40 kilowatts. So this is the correct option and this completes the solution. 

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The color of the curve corresponding to an incident beam that is unpolarized is green.

Unpolarized light is light that has no specific polarization. It consists of a mixture of electric fields oscillating in random directions. Unlike polarized light, which vibrates in a single plane, unpolarized light vibrates in multiple planes. Unpolarized light is created naturally by the Sun and other light sources, and can be further produced by lenses and mirrors. It is used in a variety of applications such as in fiber optics, in optical communication, and in non-destructive testing.

This is because when the light is unpolarized, it is composed of an equal mix of both vertical and horizontal components, resulting in the green color. The green curve is created because the vertical and horizontal components are added together in the same direction, resulting in the green color. The green curve is usually seen when the light is incident on a surface at a perpendicular angle.

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For a converging lens, the focal point is the point at which converging light rays cross; for a diverging lens, the focal point is the point from which diverging light rays appear to originate.

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Attribute conformity is one that classifies each item in the sample as either having some attribute or not having it.

Variation present in your measurement system will affect the quality of the product and can damage your company's brand.

Purpose of Attribute measurement system analysis:

Accuracy check:

To access the customer standard, need to fulfill the customer's requirement, which means MSA performs to identify how good is our measurement system with our masters.

Precision check:

To determine that, the inspector can measure correctly. Is he checking with the same criteria across all shifts, machines, etc… to measure and evaluate parts and also called Repeatability

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The three main types of energy that play a role in Earth's processes are: solar energy, kinetic energy, and potential energy.

In the stages of the water cycle, energy moves between Earth's surface and atmosphere in the following way:

Therefore, energy moves between Earth's surface and atmosphere by the conversion of potential energy to kinetic energy and vice versa.

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In the straightforward cases where a constant force moves an object at constant velocity, the power is just P = Fv.

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The answer is: 1. Solid to Liquid; 2. Liquid to Gas; 3. Larger;  4. Greater;  5. Gas;

The substance changes from solid to liquid in 1, from liquid to gas in 2. The larger volume and greater motional freedom of the gas phase causes AS for vaporization to (always) be larger than AS for fusion.

We can define entropy as the degree of randomness or the possible states of a substance. As we go from solid to liquid to gas, the entropy increases. If the entropy change for 2 is larger than for 1, this probably means that 1 is a solid to liquid process, while 2 is a liquid to gas process. Moreover, we can define fusion as the phase change process between solid and liquid states.

Question:

Why is the entropy change for 2 larger than that for 1? Match the words in the left column to the appropriate blanks in the sentence on the right. Make the sentence is complete before submitting your answer.

gas

solid

liquid

gas to liquid

solid to liquid

liquid to gas

greater

smaller

less

solid to gas

larger

The substance changes from _____ in 1, from _____ in 2.

The  _____ volume and _____ motional freedom of the  _____ larger than AS for fusion. phase causes AS for gas vaporization to (always) be larger than AS for fusion.

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Answer:

t = 2.21 s

Explanation: s = 98 m

                      u = 0 m/s

                      a = 40 m /s ^2

                     Using the second equation of motion :

                      s = ut + 1/2 at ^2

                      98 = 0 × t + 1/2 × 40 × t × t

                       98 = 0 + 20 t ^2

                       98 = 20 t ^2

                        98 / 20 = t ^2

                        4.9 = t ^2

                         t = √ 4.9

                          t = 2.21 s