a 65 kg person dives into the water from the 10 m platform. a. what is her speed as she enters the water?

The symbol "mg/L" in water quality represents milligrams per liter, which is a unit of measurement commonly used to express the concentration of substances in water. Option a is right choice.

The symbol "mg/L" in water quality refers to milligrams per liter, which is a unit of measurement commonly used to express the concentration of substances in water.

This unit represents the number of milligrams of a particular substance that are present in one liter of water.

In the context of water quality, the concentration of various substances is typically measured in parts per million (ppm) or parts per billion (ppb). For example, the concentration of dissolved oxygen in water is typically expressed in milligrams per liter (mg/L), which is equivalent to ppm.

Micrograms per liter (µg/L) is another unit of measurement that is commonly used to express the concentration of substances in water.

However, this unit is typically used for substances that are present in very low concentrations, such as certain pollutants or toxins. In some cases, concentrations may be expressed in parts per trillion (ppt), which is equivalent to µg/L.

Option a is right choice.

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Answer:

Explanation:

This is a recoil problem, which is just another application of the Law of Momentum Conservation. The equation for us is:

\([m_av_a+m_ev_e]_b=[m_av_a+m_ev_e]_a\) which, in words, is

The momentum of the astronaut plus the momentum of the piece of equipment before the equipment is thrown has to be equal to the momentum of all that same stuff after the equipment is thrown. Filling in:

\([(90.0)(0)+(.50)(0)]_b=[(90.0)(v)+(.50)(-4.0)]_a\)

Obviously, on the left side of the equation, nothing is moving so the whole left side equals 0. Doing the math on the right and paying specific attention to the sig fig's here (notice, I added a 0 after the 4 in the velocity value so our sig fig's are 2 instead of just 1. 1 is useless in most applications).

0 = 90.0v - 2.0 and

2.0 = 90.0v so

v = .022 m/s This is the rate at which he is moving TOWARDS the ship (negative was moving away from the ship, as indicated by the - in the problem). Now we can use the d = rt equation to find out how long this process will take him if he wants to reach his ship before he dies.

12 = .022t and

t = 550 seconds, which is the same thing as 9.2 minutes

Answer:

v = 14.92 m/s

Explanation:

First, make a free body diagram and see the forces in the y-direction.

Use Newton's 2nd Law F = ma to replace ∑F_y with m * a_y.

The acceleration in the y-direction is the centripetal acceleration, a_c = v^2/r.

The normal force is 0 because this is where the rollercoaster is not falling off the track yet not touching the track.

The masses cancel out.

Solve for v to find the speed of the rollercoaster at the top of the loop.

The minimum speed the coaster must have at the top of the loop to not fall off the track is 14.92 m/s.

Answer:

a. y = (tanθ)x - 1/2gx²/(v₀cosθ)²

b. Range R = v₀²sin2θ/g

c. Time of flight T = 2v₀sinθ/g

Explanation:

a. Show that the path followed by the object is parabolic

Let the vertical component of its velocity be v₁ = v₀sinθ and the horizontal component of its velocity be v₂ = v₀cosθ where v₀ = initial velocity of the projectile.

Now, for its vertical displacement Δy = v₁t - 1/2gt²   (1)

Its horizontal displacement Δx = v₂t  (2)

From (2) t = Δx/v₂

Substituting t into (1), we have

Δy = v₁(Δx/v₂) - 1/2g(Δx/v₂)²

= (v₁/v₂)Δx - 1/2g(Δx)²/(v₂)² =

= (v₀sinθ/v₀cosθ)Δx - 1/2g(Δx)²/(v₀cosθ)²  

If we assume the initial position is at the origin, then Δx = x - 0 = x and Δy = y - 0 = y. So,

y = (tanθ)x - 1/2gx²/(v₀cosθ)² .

This is the required equation and it is a quadratic equation in x. Thus, the path followed by the projectile is parabolic.

b. The Range, R

The range, R is obtained when y = 0

So, 0 = (tanθ)x - 1/2gx²/(v₀cosθ)²

[(tanθ) - 1/2gx/(v₀cosθ)²]x = 0

x = 0 or (tanθ) - 1/2gx/(v₀cosθ)² = 0

x = 0 or (tanθ) = 1/2gx/(v₀cosθ)²

x = 0 or (tanθ)(v₀cosθ)² = 1/2gx

x = 0 or x = 2(sinθ/cosθ)(v₀cosθ)²/g

x = 0 or x = v₀²(2sinθ/cosθ)/g

x = 0 or x = v₀²sin2θ/g      [sin2θ = 2sinθ/cosθ]

So its range R = x = v₀²sin2θ/g    

c. Time of flight, T

The time of flight, T is obtained from (1) when Δy = 0 and t = T

So, 0 = v₁T - 1/2gT²

(v₁ - 1/2gT)T = 0

T = 0 or (v₁ - 1/2gT) = 0

T = 0 or v₁ = 1/2gT

T = 0 or T = 2v₁/g = 2v₀sinθ/g

So, the time of flight T = 2v₀sinθ/g

The processes that use mechanical energy as the principal energy source are Conventional milling, Ultrasonic machining,Water jet cutting So option c,d & e are  correct.

The processes that use mechanical energy as the principal energy source are:

Conventional milling: In conventional milling, mechanical energy is used to rotate the milling cutter, which removes material from the workpiece.

Ultrasonic machining: Ultrasonic machining utilizes mechanical vibrations to remove material from the workpiece. Ultrasonic energy is converted into mechanical energy to produce high-frequency vibrations that aid in material removal.

Water jet cutting: Water jet cutting employs high-pressure water streams to cut through various materials. The energy source is mechanical, as pumps are used to generate and propel the high-pressure water.

Therefore option c,d & e are correct.

1 Which of the following processes use mechanical energy as the principal energy source (three correct answers):

(a) electrochemical grinding

(b) laser beam machining

(c) conventional milling

(d) ultrasonic machining

(e) water jet cutting

(f) wire EDM

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The laws of conservation of energy and conservation of angular momentum ensure that any rotating, collapsing cloud will end up as a spinning disk is the reason.

This is defined as a curved path in space which is characterized by an object going round and round a planet, moon, or star.

In this scenario, all the planets orbit the Sun in the same direction and in nearly the same plane to ensure any rotating, collapsing cloud will end up as a spinning disk.

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put it in good terms okay

Answer:

good terms hope helpful answer to your question

Answer:

The radius of the new planet is ~2.04 * 10⁶ m, or 2,041,752 m.

Explanation:

We can use Newton's Law of Universal Gravitation:

Let's look at Newton's 2nd Law:

We can set these equations equal to each other:

The mass of the second mass (astronaut) cancels out. We are left with:

We are solving for the radius of the new planet, so we can rearrange the equation:

Substitute in our known values given in the problem (G = 6.67 * 10⁻¹¹ ; M = 7.5 * 10²³ ; a = 12).

The radius of the new planet is ~2.04 * 10⁶ m.

Answer:

i think it is 0.06 but im not sure sorry if im wrong

Explanation:

The strength of the force between the Moon and the Earth would become twice as strong if the mass of the Moon were made two times greater than its actual mass. Most of us are aware that the moon has an impact on our planet, specifically on tides.

The moon's gravity affects tides, but have you ever wondered how much that force changes if the moon's mass changes?If the mass of the moon were to be doubled, its gravitational force on the earth would also double. This means that the strength of the force between the Moon and the Earth would become twice as strong. According to the law of gravity, the force of attraction between two objects is proportional to the product of their masses. Therefore, if the mass of the Moon is doubled, the force of attraction between the Earth and the Moon will also double.

This is calculated by the following formula:$$F=G\frac{m_1 m_2}{d^2}$$where F is the gravitational force between two masses, G is the gravitational constant, m1 and m2 are the masses of the two objects, and d is the distance between the centers of the two objects.Since the mass of the Earth remains constant, doubling the mass of the Moon would result in an equal increase in the gravitational force between the two objects. The distance between the Earth and the Moon does change over time, but we can assume that it stays constant when answering this question. Thus, if the mass of the Moon were to be doubled, the gravitational force between the Earth and the Moon would also double.

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Answer:

Analytical

Explanation:

We can use the properties of parallel lines and transversals to determine the measures of the angles.

From the given information, we know that lines e and f are parallel, and the angles 9 and 80° form a linear pair, which means that angle 9 measures 180° - 80° = 100°.

Similarly, angle 5 and 55° form a linear pair, so angle 5 measures 180° - 55° = 125°.

Using the alternate interior angles property, we know that angles 3 and 8 are congruent, and both are equal to angle 5 - angle 4 = 125° - 80° = 45°. Therefore, option (ii) is incorrect.

Using the corresponding angles property, we know that angles 12 and 6 are congruent, and both are equal to angle 9 + angle 80° = 100° + 80° = 180°. Therefore, option (iv) is correct.

Using the vertical angles property, we know that angles 14 and 2 are congruent, and both are equal to angle 80°. Therefore, option (v) is correct.

Therefore, the correct options are (i) mangle2 = 125°, (iv) mangle12 = 100°, and (v) mangle14 = 100°.

Our Milky Way formerly lived a life that was very eventful: between 13 and 8 billion years ago, it led a life of frenzied activity, merging with other galaxies and devouring a lot of hydrogen to create stars.

Maosheng Xiang and Hans-Walter Rix from the Heidelberg-based Max Planck Institute for Astronomy have recreated the tumultuous adolescence of our galaxy using fresh data.

The exact ages of 250,000 Milky Way stars have to be determined by the researchers in order to accomplish this.

A few more mergers with galaxies that were somewhat smaller than the Milky Way also occurred. They shook things up and produced the so-called star halo that surrounds the Milky Way disk.

Therefore, Our Milky Way formerly lived a life that was very eventful: between 13 and 8 billion years ago, it led a life of frenzied activity, merging with other galaxies and devouring a lot of hydrogen to create stars.

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F=150N.

A high wind velocity is defined as quickness of motion or operation; swiftness; or speed.

The speed at which a body's position changes over time in a given direction is known as mechanics. the velocity of activity or reaction; the rate at which something occurs.

Velocity is the pace and direction of an object's movement, whereas speed is the time rate at which an object is traveling along a path. The displacement that an object or particle experiences with respect to time are expressed vectorially as velocity

(1400-1250)

150 N

F=150N

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After the universe's 13.7 billion year old Big Bang, it has gone through numerous phases or epochs.

It may have experienced more activity and change in the first second than in all the billions of years since because of the harsh environment and violence of its very early beginnings.

We can construct a rough timeline as follows using our current understanding of how the Big Bang might have developed, taking into account notions about inflation, the Grand Unification, etc.

The Planck Epoch (or Planck Era), which spans from 0 to around 10-43 seconds (1 Planck Time), is the closest that modern physics can come to the beginning of time itself.

Therefore, After the universe's 13.7 billion year old Big Bang, it has gone through numerous phases or epochs.

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Answer:

2 \(m/s^{2}\)

Explanation:

Acceleration = \(\frac{Final velocity-Initial velocity}{Time}\)

= \(\frac{20 - 10}{5}\)

= \(\frac{10}{5}\)

= 2 \(m/s^{2}\)

Objects that let in light and blurry images are translucent.

Translucent is a term that refers to an adjective. This characteristic is the property of an object to allow the passage of light, without allowing visibility with high clarity through it.

This term is often confused with transparency. However, they differ because a transparent object lets light through easily and allows you to see clearly through it.

According to the above, objects that allow light to pass through but do not allow clear vision are translucent.

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Answer:

Exothermic Reaction.

Explanation:

An exothermic reaction is a chemical reaction that releases energy in the form of light or heat. The burning of the candle is an exothermic reaction. Endothermic reactions - Heat is absorbed, like the Photosynthesis process.

Answer:Because it likes to repel and attract opposites

According to this equation, so f = 3.29 x 1014 Hz. The light therefore has a frequency of 3.29 x 1014 Hz. The wavelength range of visible light is roughly 400–700 nm, and its frequency range is roughly 400–800 tHz.

The frequencies used by white LED lighting devices are a combination of 474 terahertz, 535 terahertz, and 638 terahertz. White LED technology has made it possible to create inexpensive, energy-efficient lighting that may be utilised in a range of applications, from desk lamps to street lamps.

The capacity to render different kinds of light visible for human sight makes light energy a type of kinetic energy. Light is referred to as an electromagnetic radiation that is produced by hot objects like the sun, lasers, and lightbulbs. Photons, which are tiny energy packets, are present in light.

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Answer:

I. The angle θ increases, and the pattern expands away from the bright center

II. The angle θ increases, and the pattern expands away from the bright center

Explanation:

The given information are;

The light used to produce a diffraction pattern = Blue light

The formula for refraction is given as follows;

d × sin(θ) = n·λ

Where;

d = The inter slit distance

θ = The angle to the maxima

n = Number to the integer next fringe

λ = Light wavelength

The wavelength of blue light is between 450 and 495 nanometers

Therefore;

I. When we switch to yellow light

The wavelength of yellow light is between 590 and 560 nanometers, which is an increase in wavelength, given that d, the inter slit distance is held constant, the angle θ increases, and the pattern expands away from the bright center

II. Decrease the slit width

When the slit width is decreased, and the wavelength remains the same, the angle θ increases, and the pattern expands away from the bright center.

The probability that a damaged bag is supplied from supplier A is 53.8%.

There are two suppliers, A and B, from which a building contractor purchases cement in a ratio 70: 30.

The probability of a damaged bag of cement arriving from supplier A will be found in this question.

Bayes' Theorem, which is one of the most important concepts in statistics, will be used to solve this problem.

The following is the formula for Bayes' theorem:

P(A|B) = (P(B|A) x P(A))/P(B)

Where P(A) and P(B) are the probabilities of events A and B occurring, respectively, and P(B|A) is the probability of B given that A has occurred.

Let us suppose that a bag of cement is chosen at random and that it is damaged. We want to determine the probability that the bag was supplied by A.

Let D represent the event that a bag is damaged, and let A represent the event that the bag is supplied by supplier A.

Then, by Bayes' theorem, we have:

P(A|D) = (P(D|A) x P(A))/P(D)

The probability of a bag being damaged given that it was supplied by supplier A is 1 - 0.95 = 0.05, as stated in the problem.

Similarly, the probability of a bag being damaged given that it was supplied by supplier B is 1 - 0.90 = 0.10.

The probability of a bag being supplied by supplier A is 0.70, whereas the probability of a bag being supplied by supplier B is 0.30.

The probability of a bag being damaged is as follows:

P(D) = P(D|A) x P(A) + P(D|B) x P(B)

      = 0.05 x 0.70 + 0.10 x 0.30 = 0.065

Therefore, the probability that a damaged bag was supplied by supplier A is as follows:

P(A|D) = (P(D|A) x P(A))/P(D)

          = (0.05 x 0.70)/0.065 = 0.538

Therefore, there is a 53.8% chance that a damaged bag was supplied by supplier A.

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The answer to the question “Newton reasoned that the gravitational attraction between Earth and the moon must be...” is option (c) directly proportional to distance.

 Newton reasoned that the gravitational attraction between two objects was directly proportional to their masses and inversely proportional to the square of the distance between them.

Gravity is a fundamental force that operates between two objects with mass. The gravitational force between two objects with mass is proportional to the product of the masses and inversely proportional to the square of the distance between them.

The formula F = Gm1m2 / r^2 represents the relationship between gravitational force, masses, and distance. Here, F is the force of gravity between the objects, G is the gravitational constant, m1 and m2 are the masses of the objects, and r is the distance between their centers.

Gravitational force, often known as gravity, is one of the four fundamental forces in the universe. It is the force that exists between two objects that have mass. The attraction that exists between any two objects with mass is determined by gravitational force. This force exists between all things in the universe, but it is generally too weak to be noticed.

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The maximum potential difference between the disks is 6.25 V when they are separated by a distance of 0.010 m and connected to a 12-V battery.

When two disks of radius 0.10 m are separated by a distance of 0.010 m and are connected to a 12-V battery, the maximum possible voltage between the disks is given by Vmax = (Qmax / (2 * ε0 * A)) * d where Vmax is the maximum possible voltage between the disks

Qmax is the maximum possible charge on the disksε0 is the permittivity of free space

A is the area of the disks d is the distance between the disks.

Substituting the given values, we have

\(A = \pi$ * r^{2} = \pi$ * 0.10^{2} = 0.0314 m^{2} \epsilon0 = 8.85 \times 10^{-12} F/m\) and d = 0.010 m

Thus, we get, \(Qmax = CV = (A * \epsilon0 * Vmax) / d= (0.0314 * 8.85 \times 10^{-12} * 12) / 0.010= 3.51 \times 10^{-12} C\)

The maximum potential difference between the disks is given by,

\(Vmax = (Qmax / (2 * \epsilon0 * A)) * d= (3.51 \times 10^{-12} / (2 * 8.85 \times 10^{-12} * 0.0314)) * 0.010\approx 6.25 V\)

Therefore, the maximum potential difference between the disks is 6.25 V when they are separated by a distance of 0.010 m and connected to a 12-V battery.

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Using the equation τ = I × α, where I is the moment of inertia and α is the  angular acceleration, we find that the torque delivered by the motor is approximately 1.104 N·m.

The moment of inertia for a solid cylinder rotating about its central axis is given by:

I = (1/2) × mass × radius^2

Mass of the grindstone (m) = 1.70 kg

Radius of the grindstone (r) = 0.64 m

Angular acceleration (α) = (final angular velocity - initial angular velocity) / time

We calculate the angular acceleration first :

Initial angular velocity (ω₁) = 0 rev/s (since it starts from rest)

Final angular velocity (ω₂) = 24 rev/s

Time (t) = 7.53 s

Angular acceleration (α) = (ω₂ - ω₁) / t

= (24 rev/s - 0 rev/s) / 7.53 s

= 24 rev/s / 7.53 s

≈ 3.19 rev/s²

Now, we calculate the moment of inertia (I):

I = (1/2) × m × r^2

= (1/2) × 1.70 kg × (0.64 m)^2

≈ 0.346 kg·m²

Finally, we calculate the torque (τ):

τ = I × α

≈ 0.346 kg·m² × 3.19 rev/s²

≈ 1.104 N·m (Newton meters)

Therefore, the torque delivered by the motor is approximately 1.104 N·m.

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Answer:

Shooting guard I think

Explanation:

Answer:

the center

Explanation:

i had it on my test

Answer:

C. amount of charge on the source charge.

Explanation:

Electric field lines can be defined as a graphical representation of the vector field or electric field.

Basically, it was first introduced by Michael Faraday and it is typically a curve drawn to the tangent of a point is in the direction of the net field acting on each point.

The number, or density, of field lines on a source charge indicate the amount of charge on the source charge. Therefore, the density of field lines on a source charge is directly proportional to quantity of charge on the source.

Radiation that is invisible to the human eye and has low energy is typically found in the region of the electromagnetic spectrum is the infrared (IR) spectrum.

The electromagnetic spectrum encompasses a wide range of wavelengths and frequencies, with different regions corresponding to different types of radiation. The infrared spectrum lies just beyond the visible spectrum, with longer wavelengths and lower energy than visible light.

Infrared radiation is not detectable by the human eye, as it falls outside the range of wavelengths that our eyes are sensitive to. However, many devices, such as thermal cameras and infrared sensors, can detect and measure infrared radiation.

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Answer:

c = 894.90 m/s

Explanation:

Given data:

Frequency of wave = 471 Hz

Wavelength of wave = 1.9 m

Speed of wave = ?

Solution:

Formula:

Speed of wave = frequency × wavelength

c = f×λ

c = 471 Hz × 1.9 m

  Hz = s⁻¹

c = 471s⁻¹ × 1.9 m

c = 894.90 m/s

The speed of wave is 894.90 m/s.