Pls help
Objects with masses of 205 kg and a 505 kg are separated by 0.350 m. (a) Find the net gravitational force exerted by these objects on a 37.0 kg object placed midway between them. magnitude N direction

Answer:

34.55m/s

Explanation:

Now from Newton's law of motion;

V= U+ a×t

V- final velocity

U- initial velocity = 0m/s

a- acceleration

t- time

Note that a = g/cos53.2°

Now g is acceleration of free fall due to gravity

This is a vertical acceleration since the course of motion is along a plane inclined at 53.2° to the height of the pool.

Also from trigonometry identity

cos 53.2°= vertical component a/ acceleration ( cos a = adjacent/hypothenus)

If we assume g = 9.8m/S2 { a generally given value}

Substituting t = 3.45s as the time of consideration, we have;

V = 0 + (9.8/cos53.2°)×3.45

= -34.55m/s

Note the -ve sign is just telling us this velocity is causing the object to move down.

Hence V = 34.55m/s

Answer:

27.07 m/s

Explanation:

this is the right answer

Answer:

a)it increasing accelerates, constant acceleration, decreasing acceleration

b)6.66m/sec

Explanation:

b)speed=distance/time

Answer:

The answer is 1/16

Explanation:

1. Persistence of vision refers to the optical illusion that occurs when visual perception of an object does not cease for some time after the rays of light proceeding from it have ceased to enter the eye. 2. The persistence of vision for normal eye is 1/16 if a second.

Answer:cool

Explanation:

cool cool cool cool

Answer:

Hey, bro here is the explanation....

Explanation:

Hope it helps...

Saudi Arabia and Russia, acting as leaders of the OPEC plus energy cartel, announced the cut in production this week in a bid to increase oil prices.

This is referred to as the process in which goods and services are made or produced from raw materials into finished products and examples include cement, furniture etc.

The leaders of the OPEC plus energy cartel, announced that there will be a cut in production this week so as to raise the prices. This is because when goods become scarce the the price will increase due to very limited numbers being available.

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Answer:a Skill Development Plan (SDP) is a custom, date-driven inventory and schedule of skills and knowledge that must be learned in a given role—and the resources available and test questions needed to confirm that the right knowledge has been transferred.

A boat can move at 30 km/h in still water, so to move 12 km upstream in a river flowing 6.0 km/h, it will take 20 minutes.

Water is referred to as still water when its motion is zero, or when it is still. Motionless water is defined as water that remains still, not flowing, and has no current, such as in rivers and streams. Therefore, a boat's relative speed on calm water is equal to 12 (a + b) km/hr. The stream is moving at a pace of 1/2 (a - b) km/hr.

Moving upstream, or against the flow of water, refers to a boat  going against the current. The distinction when speaking about water in rivers and streams is that upstream is in opposition to the water flow and in the direction of the water's original source (where the river originates).

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The velocity of the electron can be determined using the de Broglie wavelength formula, which relates the wavelength (λ) to the momentum (p) of a particle: λ = h / pwhere λ is the wavelength, h is the Planck's constant (6.626 x 10^-34 J·s), and p is the momentum.

To find the velocity, we need to first calculate the momentum of the electron. The momentum (p) of a particle is given by:
p = m * v
where m is the mass of the electron and v is its velocity. Rearranging the de Broglie wavelength formula, we have:
p = h / λ
Substituting the given values, we can calculate the momentum:
p = (6.626 x 10^-34 J·s) / (8.7 x 10^-11 m) = 7.61 x 10^-24 kg·m/s.
Now, we can solve for the velocity (v):
v = p / m = (7.61 x 10^-24 kg·m/s) / (9.1 x 10^-31 kg) ≈ 8.36 x 10^6 m/s
Therefore, the velocity of the electron is approximately 8.36 x 10^6 m/s.

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The time it take a plane traveling 82. 0 m/s to fly once around a circle whose radius is 2850 m = 218 s

The motion of an object on a circular path at a constant or uniform speed is referred to as uniform circular motion.

If the period T is the time it takes an object to complete one circular path, i.e. one revolution, the relationship between speed v, period T, and the circumference of the circle 2\(\pi\)r is:

v = 2\(\pi\)r / T

Where:

v = the velocity of the object (m/s)

r = radius (m)

T = period / time (s)

Hence,

v = 2\(\pi\)r / T

82.0 = 2\(\pi\)(2850) /T

T = 218 s

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The correct option is A.

The statement that will correct the error in Edwin's notes is as follows:

An electrically charged object needs to touch an uncharged object before they attract or repel.

How do electrically charged objects produce attraction?

The electrically charged objects produce attraction of oppositely charged objects. For example, if a positively charged object and a negatively charged object bring close to each other, they interact with one another. Their forces act in the same direction. i.e. from the positive to the negative charge.

There is an interaction between two oppositely charged objects required in order to furnish attraction, while there is an interaction between two identical charged objects required in order to furnish repulsion.

Therefore, whether it is attraction or repulsion, it must be required that an electrically charged object needs to touch an un-charged object.

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[NOTE: THIS IS AN INCOMPLETE QUESTION. THE COMPLETE QUESTION IS:

What happens when an uncharged object is placed close to a charged object, the objects can attract or repel each other. When two electrically charged objects is placed closed to another object that is uncharged?

A) An electrically charged object needs to touch an uncharged object before they attract or repel.

B) When an electrically charged object comes close to an uncharged object, it will attract it.

C) If an electrically charged object is near an uncharged object, it will repel it.

D) When two electrically charged objects are placed close together, they only attract.]

The distance between the two charges is 3.12 m.

The distance between the two charges is determined by applying Coulomb's law of electrostatic force.

F = kq₁q₂ / r²

where;

The distance between the two charges is calculated as;

r² = kq₁q₂  / F

r = √ ( kq₁q₂  / F )

r = √ ( 9 x 10⁹ x 40 x 10⁻⁶ x 108 x 10⁻⁶ / 4 )

r = 3.12 m

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It accelerates at about 32 feet per second every second, so it starts falling at zero feet per second and, one second later it is traveling at 32 feet per second. That means that its average speed is 16 feet per second, so it will fall 16 feet in the first second.

The moment when the coffee filter fall from the upward, it is in the equilibrium.

A coffee filter is falling through the air after being released from a specific height. The filter accelerates for a time and rotates a bit so that the bottom of the filter is facing down, but then reaches a terminal velocity. Now, it is continuing to fall at a constant speed without tipping or rotating. When it is falling from the height, the gravitational force acting on it and the air resistance acting on it balances out each other. Then there is no net force on the coffee filter that is acting on it either ways. When the filter is going downwards many are the forces they are working on it, but when it is going down all the forces acting on it got cancel out and only the net forces acting on majorly cancel each other effect and it nullifies them and their effect and we got a net zero force on it. Hence, we can conclude that at the moment, when the coffee filter is falling from the height the forces are balance out and there is no net force and the coffee cup is in equilibrium.

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Answer:

because if someone close to u gets sick you would know how to cure it

The reading on the scale is 882.6 N when the elevator accelerates upwards with an acceleration of 4.90 m/s².

Given that the mass of a person is 60.0 kg and the elevator accelerates upwards with an acceleration of 4.90 m/s², we have to determine the reading on the scale.

Let F be the force exerted by the scale on the person. Then, by Newton's second law of motion, the net force acting on the person is Fnet= m * a

where m = 60.0 kg is the mass of the person and a = 4.90 m/s² is the acceleration of the elevator. Hence, the net force acting on the person is given by;

Fnet = 60.0 kg * 4.90 m/s²

Fnet = 294.0 N

Therefore, the scale reading is equal to the force exerted by the scale on the person. Since the elevator is accelerating upwards, the force exerted by the scale on the person is greater than the weight of the person, which is the force of gravity acting on the person.

The force of gravity acting on the person is given by;

Fg = m * g, where g = 9.81 m/s² is the acceleration due to gravity. Hence, the force of gravity acting on the person is given by;

Fg = 60.0 kg * 9.81 m/s²Fg = 588.6 N

Therefore, the scale reading is given by the sum of the force of gravity acting on the person and the net force acting on the person;

F = Fg + Fnet

F = 588.6 N + 294.0 N

F = 882.6 N

Thus, the reading on the scale is 882.6 N when the elevator accelerates upwards with an acceleration of 4.90 m/s².

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The generator will deliver a current of 447.6 A at a terminal potential difference of 2000 V.

To solve this problem, we need to use the following formula to calculate the electrical power output of the generator:

P_elec = η P_mech

where P_elec is the electrical power output, η is the efficiency of the generator (in this case, 80%), and P_mech is the mechanical power input to the generator (in this case, 1500 hp).

First, we need to convert the mechanical power input from horsepower to watts:

1 hp = 746 W

So, P_mech = 1500 hp × 746 W/hp = 1,119,000 W

Next, we can calculate the electrical power output of the generator:

P_elec = 0.8 × 1,119,000 W = 895,200 W

Now, we can use the formula for electrical power output to calculate the current delivered by the generator at a terminal potential difference of 2000 V:

P_elec = I V

where I is the current and V is the potential difference.

Rearranging the equation, we get:

I = P_elec / V = 895,200 W / 2000 V = 447.6 A

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The frequency of the UV-B ray, given that it has a wavelenght of 3.0×10⁷ m is 10 Hertz

The frequency of a wave in relation to wavelength and velocity is given by the following formular:

Velocity (v) = wavelength (λ) × frequency (f)

v = λf

The following data were obtained from the question:

The frequency of UV-B ray can be obtained by using the above formula as illustrated below:

Velocity (v) = wavelength (λ) × frequency (f)

3×10⁸ =  3.0×10⁷ × frequency

Divide both sides by 3.0×10⁷

Frequency = 3×10⁸ / 3.0×10⁷

Frequency = 10 Hertz

Thus, we can conclude, from the above calculation that the frequency is 10 Hertz

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The conventional steel vehicle (CV) uses 39,336 gallons of gasoline per year, resulting in an annual energy consumption of 100,000 MBTU. The CV's total life cycle energy use is 115,000  MBTU.

Annual gasoline use for CV:

CV's annual gasoline use = (12,000 miles/year) / (33 miles/gallon) = 364 gallons.

Energy consumption during operation (Ed) for CV:

CV's annual energy consumption during operation = (364 gallons/year) × (114,000 BTU/gallon) = 41,496,000 BTU.

Converting to MBTU: CV Ed = 41,496,000 BTU / 1,000,000 = 41.496 MBTU.

Life cycle energy use (Eiot) for CV:

CV's life cycle energy use = (CV's annual energy consumption during operation) + (energy required to produce CV) = CV Ed + (100 million BTU).

Converting to MBTU: CV Eiot = CV Ed + (100 million BTU / 1,000,000) = 41.496 MBTU + 100,000 MBTU = 100,041.496 MBTU.

Rounding to 3 significant figures: CV Eiot = 100,000 MBTU.

End of life energy consumption (Eic) for CV:

Given that the end-of-life energy consumption for CV is 15% higher than AIV, we can calculate Eic for AIV first. Let's denote AIV's Eic as X.

X = CV Eiot × 1.15 = 100,000 MBTU × 1.15 = 115,000 MBTU.

Thus, CV's Eic = 115,000 MBTU.

Therefore, the answers are:

CV Eiot = 100,000 MBTU (CV's life cycle energy use).

AIV Eiot = 100,041.496 MBTU (AIV's life cycle energy use).

Since the CV has a lower end-of-life energy consumption (Eic) compared to AIV, the CV would have a lower life-cycle energy use.

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a. True If two vectors are perpendicular to each other, their cross product must be zero.

The vector is always equal to its cross-vector product. A line that is perpendicular to another line will create an angle of 900 degrees between them. As a result, even if two provided vectors are perpendicular, their cross product does not equal zero, but their dot product does.

A 90 degree angle is created between two vectors when they are perpendicular to one another. As we all know, the cross product of two vectors is equal to the product of the magnitudes of the vectors and the sine of the angle between them.

The dot product of two vectors that are perpendicular to one another is equal to zero.

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The intensity at a point on the screen 2.00 mm from the center of the central maximum is approximately 0.034 W/m². The intensity at a point on the screen 1.50 mm from the center of the central maximum is approximately 0.024 W/m².

I = Imax cos² (πd sin θ / λ),

where Imax is the intensity at the center of the interference pattern, d is the distance between the two slits, θ is the angle between the line connecting the point on the screen to the center of the interference pattern and the line perpendicular to the screen, and λ is the wavelength of the light.

To find the angle θ, we can use the small angle approximation:

sin θ ≈ θ ≈ y/L,

where y is the distance from the center of the interference pattern to the point on the screen, and L is the distance between the slits and the screen.

We are given d = 0.0720 mm, λ = unknown, L = 0.800 m, Imax = 0.0700 W/m², and the distance from the center of the central maximum to the first minimum y = 3.00 mm.

Using the given distance y, we can find the value of sin θ:

y/L = sin θ,

3.00 mm / 0.800 m = sin θ,

sin θ = 0.00375.

Now we can solve for the wavelength λ:

Imax cos² (πd sin θ / λ) = I,

0.0700 W/m² cos² (π(0.0720 × 10⁻³ m)(0.00375) / λ) = I,

cos² (π(0.0720 × 10⁻³ m)(0.00375) / λ) = I / 0.0700 W/m²,

π(0.0720 × 10⁻³ m)(0.00375) / λ = ± cos⁻¹ (√(I / 0.0700 W/m²)),

λ = π(0.0720 × 10⁻³ m)(0.00375) / cos⁻¹√(I / 0.0700 W/m²)),

λ = 5.70 × 10⁻⁷ m (for the positive root).

Now we can find the intensities at the given distances from the center of the central maximum.

For y = 2.00 mm:

sin θ = y/L = 2.00 mm / 0.800 m = 0.00250,

I = Imax cos² (πd sin θ / λ)

I = 0.0700 W/m² cos² (π(0.0720 × 10⁻³m)(0.00250) / (5.70 × 10⁻⁷ m))² ≈ 0.034 W/m².

So the intensity at a point on the screen 2.00 mm from the center of the central maximum would be approximately 0.034 W/m².

For y = 1.50 mm:

sin θ = y/L = 1.50 mm / 0.800 m = 0.001875,

I = Imax cos² (πd sin θ / λ)

I= 0.0700 W/m² cos² (π(0.0720 × 10⁻³m)(0.001875) / (5.70 × 10⁻⁷ m))² ≈ 0.034 W/m².

I ≈ 0.024 W/m².

So the intensity at a point on the screen 1.50 mm from the center of the central maximum would be approximately 0.024 W/m².

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Answer:

x = 1/2

Explanation:

5x/x + 2 = 3x/x + 1

do cross multiplication

(x + 2) * 3x = (x + 1) * 5x

3x^2 + 6x = 5x^2 + 5x

6x - 5x = 5x^2 - 3x^2

x = 2x^2

x/x^2 = 2

1/x = 2

1 = 2x

1/2 = x

Answer:Electrical conduction is the transfer of electrically charged particles through a medium, such as electricity traveling through the power lines in your house. Sound conduction (or acoustic conduction) is the transfer of sound waves through a medium, such as vibrations from loud music passing through a wall.

Explanation: Trust

Answer:

B. They will attract one another

Explanation:

When two pieces of silk that have acquired an electric charge are brought close together, they will either attract or repel each other, depending on the nature of the charges.

If the two pieces of silk have the same type of charge (both positive or both negative), they will repel each other. This is because like charges repel each other.

On the other hand, if the two pieces of silk have opposite charges (one positive and one negative), they will attract each other. This is because opposite charges attract each other.

Therefore, the answer is B. They will attract one another if they have opposite charges, and they will repel each other if they have the same charge.

Uniform circular motion is defined as the constant-speed movement of an object in a circle.

The definition of speed is. The rate at which an object's position changes in any direction. Speed is defined as the ratio of distance traveled to time spent traveling.

Speed is classified as a scalar quantity because it has only one direction and no magnitude.

In summary, the act of turning away or in the opposite direction. reversal, reverse, reversion, turnabout, turnaround.

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Answer:

There must be a lot of dark matter that can be felt but not seen

The astronomers interpreted the unexpectedly fast rotation of galaxies that there must be a large quantity of dark energy whose gravity is detectable yet invisible.

Any system of stars plus interstellar material that makes up the cosmos is referred to as a galaxy. Such assemblages are common, and many of them are so massive that they hold tens of trillions of stars.

A vast variety of galaxies, from dim, hazy dwarf objects to spectacular spiral-shaped giants, have been created by nature. Almost all galaxies seem to have formed shortly after the universe started, and they are everywhere in space, even at the farthest limits of the universe that can be seen by the most advanced telescopes.

The majority of galaxies are found in clusters, many of which are further organized into clusters that span hundreds of billions of light-years.

Since there are almost empty spaces between these so-called super clusters, the universe's overall structure resembles a network of sheets or chains of galaxies.

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