as light from a star spreads out and weakens, do gaps form between the photons?

The final momentum of the skater is 3.77 m/s.

Momentum is the product of mass and acceleration. Recall that the principle of conservation of linear momentum states that total momentum before collision must equal the total momentum after collision.

Thus;

(50 Kg × 0 m/s) + (55Kg ×  7.2m/s) = (50 Kg + 55Kg) v

v =  (55Kg ×  7.2m/s)/(50 Kg + 55Kg)

v = 396/105

v = 3.77 m/s

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In an ideal circuit, the current entering a battery should be equal to the current leaving the battery. This is based on the principle of conservation of charge, which states that electric charge cannot be created or destroyed, only transferred or redistributed.

Based on the data in Table 2 and the photo provided, it appears that the current entering the battery was not equal to the current leaving the battery. In Table 2, the current entering the battery was consistently higher than the current leaving the battery, indicating that some of the current was being used up by the battery itself. In Photo 1, the battery appears to be connected in a circuit, with wires leading both into and out of the battery. This suggests that the battery is being used to power some kind of device or system, which would explain why the current entering the battery is higher than the current leaving the battery. Overall, it is clear that the battery is not simply passing current through without any effect, but is actively involved in the circuit in some way.

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Answer:

B

Explanation:

reading the volume of water in a graduated cylinder which can be read to the nearest mL is accurate, it lacks precision due to the bottom meniscus formed.

the bottom meniscus may cause a wrong reading due to refraction of light

Answer:

38

Explanation:

76 divided by 2 =38

Answer:

22.38 kW

Explanation:

A 1 HP motor is supposed to deliver power equivalent to 746 Watts, or in other words, the rotational mechanical energy delivered by the shaft of the motor is rated to be equal to 746 Watts or .746 kW. This .746 kW is the net result delivered by the shaft of the motor “after” overcoming losses from the total power consumed by the motor from its input source, wherein there are losses attributed to mechanical friction, electrical losses within the motor, sound, heat, etc. This difference between the electrical power consumed by the motor from the “input” source and the mechanical energy delivered from the “output” source (shaft) is defined as performance efficiency, which is mostly around 80% in most motors.

Now, presuming that your motor performs at 80% efficiency, the total power it consumes will be .746 kW/80 X 100 = 0.9326 kW/hour.

Therefore, if you keep the motor running for 24 hours, the total power consumption will be 0.9326 kW X 24 Hours = 22.38 kW

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1.5m/s2

F=ma

a=F/m

a=60/40

a=1.5m/s2

The acceleration of the cart is 1.5 meter per seconds square.

Given the following data:

To find the acceleration of the cart, we would use Newton's Second Law of Motion.

Mathematically, Newton's Second Law of Motion is given by the formula;

\(Acceleration = \frac{Net\; Force}{Mass}\)

Substituting the given parameters into the formula, we have;

\(Acceleration = \frac{60}{40}\)

Acceleration = 1.5 meter per seconds square.

Therefore, the cart's acceleration is 1.5 meter per seconds square.

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The purpose of the calibration curve in Part V of the electrochemical measurement procedure is to establish a relationship between the measured signal and the analyte concentration.

In electrochemical measurements, the calibration curve plays a crucial role in quantifying the concentration of the analyte of interest. It involves plotting a series of known analyte concentrations against their corresponding measured signals. By analyzing the resulting curve, one can determine the relationship between the signal response and the analyte concentration. This relationship is typically linear or follows a specific mathematical model. The calibration curve serves as a reference to convert the measured signals obtained from unknown samples into their corresponding analyte concentrations. It allows for accurate and reliable quantitative analysis by providing a means to interpolate or extrapolate the analyte concentration based on the measured signal.

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A model can be altered in a number of ways, by importing a database, combining information, or erasing data.

The term "scientific manipulation" in behavior analysis describes the methodical organization of a variable under research in order to enable the objective analysis of the effects of the variable presence or absence on some other measurable behavior.

To manipulate data, build a database with information from many sources, clean and rearrange the content of the database, combine and remove redundant information, and then do an analysis to uncover important information.

Understanding your needs and goals, utilizing automation tools, filtering your data, and researching various manipulation tools are some strategies for manipulating data.

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The vector BR in unit vector notation is:

BR = 8.485 î + 8.485 j

What is Vector?

Vectors can be added together to find the result, which is known as the vector sum. The vector sum can be found using the head-to-tail method, where the tail of one vector is placed at the head of the other vector. The vector sum is the vector that goes from the tail of the first vector to the head of the second vector.

To write the vector BR in unit vector notation, we need to find its components in the i and j directions.

Given that the magnitude of the vector is 12.0 and it makes an angle of 45 degrees with the positive x-axis, we can use trigonometry to find the components.

The x-component (i-direction) of the vector is given by:

Bx = B cos θ = 12.0 cos 45° = 8.485

The y-component (j-direction) of the vector is given by:

By = B sin θ = 12.0 sin 45° = 8.485

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In this experiment, time represents the variable that is independent and graphed on the horizontal axis.

The period of the pendulum does not depend on the mass of the sphere, only on the length of the chord. Two pendulums with different masses but the same length have the same period. Two pendulums of different lengths have different periods with the pendulum with the longer string having a longer period.

For small deflections of less than 15 degrees, the pendulum experiences simple harmonic oscillations. This means that its restoring force is directly proportional to its deflection. A simple pendulum is called a simple pendulum. The longer the pendulum is, the longer it will take to travel the distance it swings from side to side. The period of a pendulum is the time it takes for the weight to swing and return to its original position so it means a longer period.

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The launch proyectiles of kinematics  allows to find the maximum initial vertical velocity of the body so that it just reaches the ceiling

             v_{oy} = 2.56 m / s

Given parameters

To find

Projectile launching is an application of kinematics where on the x axis there is no acceleration or and on the y axis the acceleration is the acceleration of gravity (g = 9.8 m / s ^ 2)

In this case, the maximum vertical velocity that the body can have occurs when the velocity on the ceiling is zero.

            v_y² = v_{oy}² - 2 g y

where v and v_{oy} are the initial velocity at the ceiling e initial, respectively, g the acceleration of gravity e and the height

           0 = v_{oy}² - 2 g y

           v_{oy} = \(\sqrt{2gy}\)

           v_{oy} = \(\sqrt{2 \ 9.8 \ 3}\)

           v_{oy} = 2.56 m / s

In conclusion with the kinematic of launch projectiles we can find the maximum initial vertical velocity of the body so that it just reaches the ceiling

             v_{oy} = 2.56 m / s

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Explanation:

We have,

Mass of a box is 115 kg

Applied force is 424 N

It is required to find the frictional force of the floor on the box against you. Frictional force is an opposing force. It opposes the motion of an object. Here the applied force is 424 N. So, the frictional force has a magnitude of 424 N but it acts in opposite direction.

Given:

• Distance = 150 km

• Speed = 50 km/hr

Let's find the time it will take to cover the distance in minutes.

To find the distance, apply the formula:

Thus, we have:

The time in hours is 3 hours.

To convert the time from hours to minutes, we have:

60 minutes = 1 hour

3 hours = 3 x 60 = 180 minutes

Therefore, it time in minutes is 180 minutes.

ANSWER:

180 minutes

0.80tesla is a strength of a magnetic field.

At a distance r from the wire, a current I flowing through a long, straight wire generates a magnetic field with intensity H=I/2r. In other words, the field's strength is inversely proportional to the distance from the wire.

Newtons per coulomb (N/C) or volts per meter (V/m) are the SI units for measuring electric field strength. E = F/q, where F is the force felt by a very small test charge q placed in a field E in a vacuum, gives the force felt by the charge.

given,

I = 5A , r = 1.0m

H=I/2πr

H = 5 / 2*3.14*1.0

H = 0.80tesla

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Announcement 1: Fluid mechanics is a branch of chemistry that involves having a look at fluids:  c) False, True

Fluid mechanics is the branch of physics concerned with the mechanics of fluids and the forces on them. It has programs in an extensive variety of disciplines, such as mechanical, aerospace, civil, chemical, and biomedical engineering, geophysics, oceanography, meteorology, astrophysics, and biology. Fluid mechanics is the look at of the forces of the fluid and the way fluids flow. Fluid mechanics may be divided into parts: fluid statics and fluid dynamics. Fluid statics is the observation of fluids at rest, and fluid dynamics is the study of fluids in motion.

Fluid mechanics is the look at fluid behavior (beverages, gases, blood, and plasmas) at relaxation and in movement. Fluid mechanics has a huge variety of packages in mechanical and chemical engineering, organic structures, and in astrophysics.

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Answer:

15 cm

Explanation:

using the thin lens formula for convex lens

                            \(\frac{1}{f} = \frac{1}{p} + \frac{1}{q}\\ \\where f = focal length \\ p = object distance \\ q = image distance\\\)

 so,

         \(\frac{1}{q} = \frac{1}{f} - \frac{1}{p} \\\\\frac{1}{q} = \frac{1}{10} - \frac{1}{30} \\\frac{1}{q} = \frac{2}{30}\\\frac{1}{q} = \frac{1}{15cm}\)

so,

    q = 15 cm

If the solar nebula had been too warm for ices to condense anywhere, a planet that formed at Jupiter's location would have been different from the real Jupiter. Jupiter's composition is mostly hydrogen and helium with small amounts of other elements, such as water, ammonia, and methane.

Without the ices, the planet would have a different composition and possibly a smaller mass.

Option a) suggests that the planet would be smaller in mass than Jupiter, but still made mostly of hydrogen and helium. This could be a possibility, but it would depend on the exact conditions of the solar nebula.

Option b) suggests that the planet would turn out pretty much the same as the real Jupiter. However, without the ices, this is unlikely.

Option c) suggests that the planet would be similar in composition to Earth, with a much smaller mass than the real Jupiter. This could also be a possibility, but again, it would depend on the exact conditions of the solar nebula.

Overall, without the ices, the planet that formed at Jupiter's location would have a different composition and possibly a smaller mass than the real Jupiter.

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The refractive index of the material is 0.

When the ray is incident on a transparent surface at an angle of 360 and the angle of refraction within the material is 27°, the refractive index of the material can be determined. The formula for Snell’s law is used to calculate refractive index. It states that: `sin i / sin r = n where i is the angle of incidence, r is the angle of refraction and n is the refractive index`.Snell’s law can be re-arranged to make n the subject of the formula to be: `n = sin i / sin r`Hence, we can calculate the refractive index as follows:

For the incident ray, i = 360° and the angle of refraction within the material, r = 27°.n = sin i / sin r= sin 360°/ sin 27°= 0/1 (since sin 360° = 0)= 0Therefore, the refractive index of the material is 0. T

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The term that best completes the given sentence is "competitive inhibition."

define competitive inhibition ?

Competitive inhibition is a type of enzyme inhibition where a molecule, called a competitive inhibitor, binds to the active site of an enzyme and blocks the binding of the substrate, preventing or reducing the enzyme's activity. The competitive inhibitor has a similar shape to the substrate, and thus competes with the substrate for binding to the active site. This type of inhibition can be reversed by adding more substrate, which outcompetes the inhibitor for binding to the active site.

Competitive inhibition is often used in drug design, as molecules that act as competitive inhibitors can be used to selectively target specific enzymes and prevent their activity.

The term that best completes the given sentence is "competitive inhibition."

Competitive inhibition refers to a situation in which one company or individual attempts to gain an advantage over another by developing or promoting a similar product or idea that reduces the demand for the other's product or idea. In this case, Nela believes that Logan's electric yacht idea is directly competing with Dunamis Motors, and is therefore a form of competitive inhibition.

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The boat will bob up and down on ocean waves that have a wavelength of 36.0 m and a propagation speed of 4.80 m/s once every 7.50 seconds.

To solve the given question, we must use the formula:

n= v/f

Where: v is the velocity of the wave (in m/s)f is the frequency of the wave (in Hz)n is the number of cycles per second

Therefore, the frequency of the wave (in Hz) can be calculated by using the formula:

f= v/λ

where: v is the velocity of the wave (in m/s)λ is the wavelength of the wave (in m)

The frequency of the wave is 0.1333 Hz (approx).

Now, the number of cycles per second (n) is: n = v/λ

We can solve for n by dividing the velocity of the wave by the wavelength of the wave.

Therefore,

n= v/λ= (4.80 m/s) / (36.0 m)= 0.1333 Hz

So, the boat bob up and down 0.1333 times a minute on ocean waves that have a wavelength of 36.0 m and a propagation speed of 4.80 m/s.

1 Hz = 60 seconds,

0.1333 Hz = 7.50 seconds.

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The impedance of the circuit is 193.9 ohms. The result is obtained by dividing the applied voltage by the total current.

In a parallel RC (resistance and reactance) circuit, impedance can be expressed as

\(Z = \frac{RX_{c} }{\sqrt{R^{2} + X_{c}^{2} } }\)

Z = V/I

Where

We have:

The impedance should be found by determining the branch currents and the total current.

The branch currents are

Ir = V/R = 470/470 = 1 A

Ic = V/Xc = 470/330 = 1.424 A

In the parallel circuit, the total current is

I = Ir + Ic = 1 + 1.424 = 2.424 A

By using the total current, the impedance is

Z = V/I

Z = 470/2.424

Z = 193.9 ohms

Hence, the impedance of the parallel RC circuit is 193.9 ohms.

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Answer:

4 hrs

Explanation:

40/10 = 4 hrs

The statement concerning an induced current, if any, in the loop is true that (b) An alternating current will be induced in the circuit that is clockwise when the magnet moves to the left and counterclockwise when the magnet moves to the right.

When a permanent magnet is moved toward and away from a solenoid with a frequency of 60 Hz, an alternating current is induced in the circuit. This is because the changing magnetic field produced by the moving magnet creates a changing magnetic flux through the solenoid.

According to Faraday's law of electromagnetic induction, the changing magnetic flux induces an electromotive force (emf) in the solenoid, which leads to the generation of an alternating current.

As the magnet moves towards the solenoid, the changing magnetic field induces a clockwise current in the circuit. Conversely, as the magnet moves away from the solenoid, the changing magnetic field induces a counterclockwise current. This alternating current direction occurs due to the changing direction of the magnetic flux through the solenoid.

Therefore, option b) is correct: An alternating current will be induced in the circuit that is clockwise when the magnet moves to the left and counterclockwise when the magnet moves to the right.

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Complete question :

A permanent magnet is moved toward and away from a solenoid with a frequency of 60 Hz. The ends of the solenoid are connected in series with a light bulb. Which one of the following statements concerning an induced current, if any, in the loop is true?

a) An alternating current will be induced in the circuit that is clockwise when the magnet moves to the right and counterclockwise when the magnet moves to the left.

b) An alternating current will be induced in the circuit that is clockwise when the magnet moves to the left and counterclockwise when the magnet moves to the right.

c) An direct current will be induced in the circuit that is clockwise as the magnet oscillates to the left and to the right.

d) An direct current will be induced in the circuit that is counterclockwise as the magnet oscillates to the left and to the right,

e) No current will be induced in the circuit by using this method.

Direct exchange rate quotations from the U.S. perspective represent the price of one unit of the foreign currency in terms of the U.S. dollar.

In direct exchange rate quotations, the perspective is from the U.S., meaning it focuses on the value of the U.S. dollar in relation to a foreign currency. The direct quotation expresses the price of one unit of the foreign currency in terms of the U.S. dollar. For example, if the direct exchange rate quotation for the U.S. dollar against the euro is 1.20, it means that one U.S. dollar is equivalent to 1.20 euros. This format allows U.S. investors and individuals to understand the value of their currency when converting it to a foreign currency. It provides clarity on how many units of the foreign currency can be obtained for a certain amount of U.S. dollars. However, it's important to note that transaction fees may apply, and these fees are separate from the direct exchange rate quotation.

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Answer:

Explanation:

initial velocity u = 54 km/h = 15 m/s

final velocity v = 18 km/h = 5 m/s

distance s = 10 m

1. v^2 = u^2 + 2as

5^2 = 15^2 + 2a × 10

25 = 225 + 20a

25 - 225 = 20a

20 a = -200

a = -200/2

a = -100m/s^2

∴Deacceleration = -100m/s^2

2. v = u + at

5 = 15 -100t

5-15 = -100t

-10 = -100t

t = 100 / 10

∴t = 10 sec

Total distance covered by the car 10 m

To me, the hardest part of this whole thing is keeping the units straight.  We're starting out with information given to us in kilometers, hours, and meters, and we have to come up with answers in m/s² , seconds, and meters.

When I worked this problem, I jumped right in without thinking, and I immediately got bogged down when I had to go off to the side and convert some units.

Now I know better.  THIS time, before we get all tangled up trying to solve anything, let's get clever and change everything to m/s right now !

(54 km/hour) · (1,000m/km) · (1 hour/3600 sec)  =  15 meters/second

(18 km/hour) · (1,000 m/km) · (1 hour/3600 sec) = 5 meters/second

NOW I'll betcha it's gonna be about 70% faster and easier !

i). Acceleration = (change in speed / time for the change)

We know the distance, but not the time.  I know there's a formula for it, but I've learned so many formulas during my lifetime that I can't remember ALL of them.  So I just memorize some of them, and I work things out from the formulas that I know.  Here's how I do time:)

Average speed during the given slow-down = (1/2)·(15+5) = 10 m/s

Distance covered during the given slow-down = 10 m.

Time = (distance) / (average speed) = (10m) / (10 m/s) = 1 second

Acceleration = (change in speed) / (time for the change)

Acceleration = (5 m/s - 15 m/s) / (1 second)

Acceleration = (-10 m/s) / (1 second)

Acceleration = -10 m/s²   (or 'Deceleration' = 10 m/s² )

_____________________________________________

For parts ii). and iii)., there's a big shift in the question.

It only gave you the slow-down from 54 to 18 km/hr for the purpose of calculating the deceleration.  NOW, for the rest of the answers, it's talking about a complete stop ... 0 m/s .

____________________________________________

ii). Time required to stop = (initial speed) / (deceleration)

Time to stop from 54 km/hr = (15 m/s) / (10 m/s²)

Time to stop = 1.5 seconds

iii).  Distance covered = (average speed) · (time to stop)

Distance covered = (7.5 m/s) · (1.5 sec)

Distance covered = 11.25 meters

OR ... use the official formula:

Distance = (1/2) · (acceleration) · (time² )

Distance = (1/2) · (10 m/s²) · (1.5 sec)²

Distance = 11.25 meters           yay !

Answer:

The gap between the plates will be 1.2 x 10^-15 m

No, this is not practically achievable.

Explanation:

Capacitance = 1.0 F

area of plate = 1.4 cm^2 = 1.4/10000 m^2 =  m^2

distance = ?

We use the equation

\(C\) =  \(\frac{A}{d}\)*ε

C is the capacitance

where A is the area

d is the distance of separation of plates

ε is the permeability of free space = 8.854×10^-12 F⋅m−1

substituting values, we have

1 = \(\frac{0.00014}{d}\)* 8.854×10^-12

distance between plates = 1.2 x 10^-15 m

This is not practically achievable in real life

When anti-lock braking system (ABS) engages during braking, you should keep pressure on your brake pedal. Therefore, option a is the correct answer.

ABS is designed to prevent the wheels from locking up and skidding during hard braking. It works by automatically modulating the brake pressure to each wheel to prevent it from locking up. When ABS engages, you may feel a pulsation or vibration in the brake pedal, and you may hear a noise.

It's important to keep firm and continuous pressure on the brake pedal when ABS engages. This allows the system to do its job and help you maintain control and stop the vehicle as quickly and safely as possible. Pumping the brake pedal or releasing pressure from the pedal can interfere with ABS operation and actually increase stopping distances.

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Answer:

the motion of an object at a constant speed along a circular path is known as Uniform circular motion