why do most oceans have two high and low tides a day?

Answer:

This is your answer

If I freeze fresh water and salt water then the fresh water will freeze more quickly because salt lowers the freezing point temperature

Explanation:

I hope it helped you

Answer:

A. adjust the seat so you can reach all controls

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This is so you can reach the gas petal, break petal, steering wheel, (and other things) easier so you won't have to lean forward and it makes it easier for when you're driving. Especially if you need to quickly press your breaks, you'll be able to do this a lot faster if you're closer to them than if you had to reach in order to do so.

I hope this helped, im not the best at explaining things lol

Answer: When a switch is closed in a circuit that contains a battery and a wire that is placed between the poles of a magnet, an electric current will flow through the wire due to the electromagnetic induction. The movement of the wire in the magnetic field generates a voltage, known as the electromotive force (EMF), which causes the current to flow in the circuit. This phenomenon is known as electromagnetic induction, which is the basis of many electrical devices such as generators, transformers, and motors. The direction of the current flow depends on the direction of the wire movement and the orientation of the magnetic field.

Explanation:

The closure of a switch in a circuit that comprises a battery and a wire positioned amid the poles of a magnet results in the generation of an electric current through the wire.

While the current flows through the wire, it generates a magnetic field surrounding it. This magnetic field interacts with the magnetic field of the magnet, thereby causing the wire to move.

This occurrence is commonly referred to as the Lorentz force or motor effect. The direction in which the wire moves is dependent on the orientation of the magnetic field and the direction of the current.

If the current flows from the battery's positive terminal to its negative terminal, the wire will move in a specific direction. Conversely, if the current flows in the opposite direction, the wire will move in the opposite direction.

This principle serves as the foundation for electric motors, which leverage the motor effect to transform electrical energy into mechanical energy. The motion of the wire between the magnet's poles can be utilized to drive various devices such as fans, drills, and even electric cars.

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Answer:

See the answers below.

Explanation:

In order to solve this problem we must use the principle of conservation of momentum and the amount of movement. Where the car moves to the left with a negative speed sign while the force of the collision will be taken to the right.

\(-m_{car}*v_{car1}+(F*t)=m_{car}*v_{car2}\)

where:

Vcar1 = velocity of the car before the collision = - 15 [m/s]

F = impact force [N]

Vcar2 = velocity of the car after the collision = 2.6 [m/s]

\(-(1500*15)+(F*t)=(2.6*1500)\\F*t=22500+3900\\F*t=26400[kg*m/s]\)

Where the product of force by Time is equal to the impulse caused by the collision.

\(And the force\\F = P/t\\F=26400/0.15\\F=176000[N]\)

Answer:

Can you show us the route and then I would be happy to help :)

Explanation:

This is an example of Potential Energy being converted into Kinetic Energy.

When the charges are brought together the initial velocity of the charges is zero which means they do not possess any kinetic energy, but they are under the influence of electric field of the other charge which creates a potential energy in them which is released when they start moving and they bear the kinetic energy as the velocity is gained.

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Answer:

(A) The same

(B) More

(C) The magnitude of the parent's acceleration is 0.625 m/s²

Explanation:

The given parameters are;

The mass of the parent, m₁ = 64 kg

The mass of the child, m₂ = 16 kg

(A) By Newton's third law of motion, action and reaction are equal and opposite

Therefore, the action of the parent on the child is equal to the reaction of the child on the parent and vice versa

Therefore, the force experienced by the child is the same as the force experienced by the parent

(B) Newton's second law states that an objects acceleration is directly proportional to the applied force and inversely proportional to the mass of the object

Therefore, the parent and the child both experience the same force but the mass of the child is less than the mass of the parent and therefore, by Newton's second law, the acceleration of the child will be more than the acceleration of the parent for the same given force

(C) The acceleration of the child, a₂ = 2.5 m/s²

Let F₁ represent the force experienced by the parent, let F₂ represent the force experienced by the child and let a₁ represent the magnitude of the parent's acceleration

By Newton's third law, we have;

F₁ = F₂

Force, F = Mass, m × Acceleration, a

We can write, F = m × a

Therefore;

F₁ = m₁ × a₁ and F₂ = m₂ × a₂

∴ F₁ = F₂ gives;

m₁ × a₁ = m₂ × a₂

a₁ = (m₂ × a₂)/m₁ = (16 × 2.5)/64 = 0.625

∴ The magnitude of the parent's acceleration = a₁ = 0.625 m/s²

Answer:

a. 0

b. 1.103625 MJ

c. Conserved

d. 1.103625/n MJ where n = The number of forces

Explanation:

The mass of the drone, m = 750 kg

The upward lift force = 125% of the weight of the drone

The time it takes the drone to reach a height of 250 m = 25 seconds

a. The mechanical energy = The kinetic energy + Potential energy

Therefore, given that the drone stars motion from the surface and was initially at rest, the mechanical energy at the surface = 0

b. The mechanical energy at height, h = 150 m, ME₁₅₀ = The potential energy gained = m·g·h

Where;

g = The acceleration due to gravity = 9.81 m/s²

∴ ME₁₅₀ = 750 kg × 9.81 m/s² × 150 m = 1103625 J = 1.103625 MJ

c. The mechanical energy is equivalent to the potential energy of the drone at the 150 m height, therefore, it is conserved

d. The work done by the force = The energy gained

Therefore, where there are n number of forces, the work done by each force = 1.103625/n MJ

Answer:

thanks for the points

Explanation:

The color gardener should use to reduce overall light energy, but still maximize plant growth in the greenhouse is blue.

What is greenhouse?

A greenhouse is a structure with walls and a roof mostly made of transparent material, such as glass, where plants that require controlled climatic conditions are grown. It is also referred to as a glasshouse or a hothouse if it has enough heating. These buildings come in a variety of sizes, from modest huts to enormous factories. A cold frame can be compared to a little greenhouse. When a greenhouse is exposed to sunshine, its interior temperature rises noticeably above the ambient temperature, shielding the items inside from cold weather.

The gardener who is concerned that her greenhouse is getting too hot from too much light, and seeks to shade her plants with colored translucent plastic sheets  should use blue color translucent plastic sheets to reduce overall light energy, and still maximize the growth of plants.

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2)

Explanation

Step 1

Ohm's law states that the strength of a direct current is directly proportional to the potential difference and inversely proportional to the resistance of the circuit.

so

a)

b)

Step 2

2

let

Power is equal to voltage multiplied by current.

so

also, replacing

also

I hope this helps you

Answer:

Explanation:

Let that point be at a distance x from q1

Then Kq1/x^2= Kq2/ (s-x)^2

Taking square roots and simplifying, x =s /[1+(q2/q1)^0.5]

Assuming an identical distance, the rigidity of Q on 2Q is equivalent in value to the rigidity of 2Q on Q. for that reason, had the area R been stored an identical, the two forces could be equivalent. inspite of the shown fact that, via fact the area is being decreased, we could constantly consult with the equation we use to calculate those forces: F = ok(Q1xQ2)/(R^2) because R is squared and is being halved, the final result's that's it being divided by potential of a million/4. for that reason, the rigidity would be expanded by potential of four, and be 4F.

got the ans

A helium-filled balloon (whose envelope has a mass of mb=0.250kg) is tied to a uniform string of length ℓ=2.00m and mass m = 0.0500 kg. The balloon is spherical with a radius of r = 0.400 m. When released in air of temperature 20∘C and density rhoair=1.20kg/m3, it lifts a length h of string and then remains stationary. We wish to find the length of string lifted by the balloon. (a) When the balloon remains stationary, what is the appropriate analysis model to describe it? (b) Write a force equation for the balloon from this model in terms of the buoyant force B, the weight Fb of the balloon, the weight FHe of the helium, and the weight Fs of the segment of string of length h. (c) Make an appropriate substitution for each of these forces and solve symbolically for the mass ms of the segment of string of length h in terms of mb, r, rhoair , and the density of helium rhoHe, (d) Find the numerical value of the mass ms. (e) Find the length h numerically.

For Winds Aloft, actual direction and knot values are utilized. forecasts the wind direction and speed at different atmospheric levels above the range of surface weather measurements.

The wind direction is indicated by the first two digits: 310 degrees true north. Wind speed is indicated by the next two digits: 27 knots (aviation and sailing traditionally use knots to measure speed, as they are more convenient).

Every six hours, the winds aloft are updated globally with a fresh prediction. The predictions are updated every hour for Australia, Europe, and North America. The worldwide predictions have a temporal resolution of every three hours to thirty hours.

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The values used for Winds Aloft Forecasts are True direction and knots. True direction is the wind direction relative to true north and knots is a speed unit indicating the speed of the wind.

Winds Aloft Forecasts, also known as upper air or upper wind information, are essential in many fields such as aviation, meteorology and climate studies. The values used for Winds Aloft Forecasts are True direction and knots. The True direction refers to the compass bearing direction from which the wind is coming, and it is relative to the true north, not magnetic north. Knots is a unit of speed used in aviation and maritime contexts, 1 knot equals 1 nautical mile per hour. Therefore, it indicates the speed of the wind. In other words, Winds Aloft Forecasts provide information about the speed and direction of winds at various altitudes.

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While parked, the static friction is what is acting on the car. When the car is started and begins to move the sliding friction acts on it. When the car starts to accelerate the rolling friction would begin to act on it.

When the car is parked on the hill, static friction is acting on the car to keep it from sliding down the hill. Static friction is the force that opposes the motion of an object when it is stationary or at rest.

When the driver starts the car, the car begins to move and sliding friction takes over. Sliding friction is the force that opposes the motion of an object when it is sliding or moving. In this case, sliding friction acts between the tires and the road to slow down the motion of the car.

As the car accelerates, rolling friction starts to act. Rolling friction is the force that opposes the motion of an object when it is rolling. In this case, rolling friction acts between the tires and the road to slow down the rotation of the wheels as they roll on the surface of the road. The rolling friction is typically lower than sliding friction, which makes it easier for the car to maintain a constant speed.

When the driver steps on the brakes, static friction takes over again to slow down the car. The brake pads are pressed against the spinning wheels, and the static friction between the brake pads and the wheels slows down the motion of the car. If the brakes are applied too hard, the wheels may start to slide, and sliding friction will take over again.

In summary, the three types of friction - static, sliding, and rolling - act at different times during the motion of the car. Static friction keeps the car from moving when it is parked on the hill, sliding friction acts when the car is accelerating or decelerating, and rolling friction acts when the car is driving at a constant speed.

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The ratio of power of Beko and Dila are in the ratio of 1:1. The power of both of them are equal.

Power is the amount of energy which is transferred or converted per unit time. The SI unit of power is the watt (W), which is equal to one joule per second. In older works, power is sometimes also called as activity.

P ∝ m/t

P₁ = 60/ 12

P₂ = 50/ 10

P₁/ P₂ = 5/ 5

The ratio of the powers of Beko and Dila is 1. This mean that the power of both of these people are equal.

​

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The number of wave cycles per second is called the frequency. Option B is the correct answer.

A wave's frequency, given in hertz (Hz), is the number of oscillations it undergoes per unit of time. The relationship between frequency and pitch is straightforward. Option B is the correct answer.

Frequencies between 20 and 20000 Hz are audible to humans. Ultrasound is a term for noises with frequencies higher than those heard by humans, while infrasound is a term for sounds with frequencies lower than those heard by humans. A wave is a disturbance that moves from one place to another while moving across a medium. The individual medium particles are only momentarily knocked out of their rest posture when a wave is present in the medium (i.e. when there is a disturbance traveling through the medium).

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The complete question is, "The number of wave cycles per second is called the

A) wavelength

B) frequency

C) crest

D) trough

E) none of the above"

frequency is the term used to describe the number of wave cycles per second. It is measured in hertz (Hz).

frequency is the term used to describe the number of wave cycles that occur in one second. It is a fundamental concept in physics and is measured in hertz (Hz). Frequency tells us how often a wave oscillates or repeats its pattern. For example, if a wave has a frequency of 10 Hz, it means that it completes 10 cycles in one second.

Frequency is an important parameter in various scientific fields. In physics, it helps us understand the behavior of waves, such as sound waves, light waves, and electromagnetic waves. Engineers use frequency to design and analyze circuits, antennas, and communication systems. In telecommunications, frequency is used to allocate different bands for radio and television broadcasting, mobile communication, and other wireless technologies.

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One consequence of Newton's third law of motion is that all actions have equal and opposite reactions. (C)

In fact, that's pretty much what the law itself says in so many words.

Answer:

Its C All actions have equal and opposite reactions

Explanation:

Ive done this before

Answer:

i don't know

Explanation:

please someone should answer

According to Newton's law of universal gravitation,the gravitational acceleration of a body above the surface of the earth is 9.8m/s^2.

When two materials that are in contact have the same temperature, the materials are said to be in thermal equilibrium.

Thermal equilibrium is a state in which there is no net flow of heat between two objects in contact. In this state, the temperature of the objects does not change over time, as there is no temperature gradient between them. This is a fundamental principle of thermodynamics, and it is the basis for the design and operation of many thermal systems.

The concept of thermal equilibrium is also important in fields such as materials science, engineering, and physics, where it is used to describe the behavior of materials and their interactions with the environment.

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--The complete question is, When two materials that are in contact have the same temperature, the materials are said to be in ______.--

The work done have been calculated as : Wgravity = 15,250 joules, W rope1 = - 9667.158 joules and W rope2 = - 5584.94 joules

Given ; Force of gravity on piano = 2500 N

r = distance of the ground =  6.10 m

As the angles are mentioned in the diagram, thus we can write

Work done can be calculated by ;

Wgravity = 2500 N . 6.10m . cos 0 = 15,250 joules

W rope1 = 1830 N . 6.10 m . cos 150 = - 9667.158 joules

W rope2 = 1295 N . 6.10 m . cos 135 = - 5584.94 joules

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Answer:

W = 12500 J

T1 = -7920 J

T2 = - 4580 J

Explanation:

The angle between the force w and the displacement is 0 degrees, therefore:

\(W_{w} = wdcos(0) = (2500)(5)(1) =\) 12500 J

The angle between the force T1 and the displacement is 90 + 60 = 150 degrees, therefore:

\(T_{1}= T_{1} dcos (150) = (1830)(5)(cos(150)) =\) - 7920 J

The angle between the force T2 and the displacement is 90 + 45 = 135 degrees, therefore:

\(T_{2} = T_{2} dcos(135) = (1295)(5)(cos (135)) =\) - 4580 J

The correct option is B: The tension on the aluminum wire is approximately 65 N.

To find the tension on the aluminum wire, we can use the formula for the speed of transverse waves in a string:

v = √(T/μ)

where:

v = speed of transverse waves

T = tension in the wire

μ = linear mass density (mass per unit length) = density * area

First, let's calculate the area of the aluminum wire:

Given diameter = 4.6 mm

Radius = diameter/2 = 4.6 mm / 2 = 2.3 mm = 2.3 x \(10^(^-^3^)\) m

Area = π * \(r^2\)

      = π * (2.3 x 10⁽⁻³⁾)²

      = π * (5.29 x 10⁽⁻⁶⁾)

      ≈ 1.658 x 10⁽⁻⁵⁾ m²

Now, let's calculate the linear mass density (μ):

Density of aluminum = 2700 kg/m³

Linear mass density (μ) = density * area

                       = 2700 kg/m³ * 1.658 x 10⁽⁻⁵⁾ m²

                       ≈ 0.0447 kg/m

Now, we can rearrange the formula for the speed of transverse waves to solve for tension (T):

T = μ * v²

Given v = 38 m/s and μ = 0.0447 kg/m, we can calculate T:

T = 0.0447 kg/m * (38 m/s)²

 ≈ 63.9906 N

Rounding to the nearest whole number, the tension on the wire is approximately 64 N.

Therefore, the closest option from the given choices is: b) 65 N

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Answer:

reflection

Explanation:

Answer:

Refraction

I think

Answer:

At the point of dropping the object, by Newton's first law due to gravitational force \(F_g\) = m × g, accelerates

By Newton's Second law the object reaches impacts on the air with the gravitational force resulting in changing momentum of m×(Final Velocity - Initial Velocity)

As the velocity increases, the rate of change of momentum becomes equivalent to the gravitational force and by Newton's third law, the action action and reaction are equal and opposite hence they cancel each other out

The body then moves at a constant uniform motion down according to Newton's first law

Explanation:

At the point the object of mass, m, is dropped from the height of the tower, the only force acting on the object is the gravitational force such that the object has an acceleration which is the acceleration due to gravity, g, and the gravitational force is therefore = m × g

As the speed of the object increases while the object is falling with the gravitational acceleration the rate at which the object cuts through layers of air which (by Newton's first law of motion, are at rest ) has some buoyancy effect also increases therefore, the object is constantly increasingly changing the momentum of the air which by Newton's second law results, at an high enough velocity, and by Newton's third law, in a force equal to the applied gravitational force

Therefore, the force of the air drag becomes equal to the gravitational force, cancelling each other out and the object then moves according to Newton;s first law, in uniform motion of a constant speed while still falling down.

The kinetic energy of the satellite when it has been moved and it enters a new circular orbit of radius 2r is K₁/2.

Centripetal force is equal to mass times velocity squared over radius (Fc = mv²/r). Gravity is equal to gravitational constant times the product of masses of two objects over distance squared (Fg = GMm/r²). The centripetal force on the satellite is provided by the gravitational pull by the earth, so Fc = Fg.

Kinetic energy, the energy acquired by a moving object, is equal to one half of a mass times velocity squared (K = mv²/2).

Fc = Fg gives the equation mv²/2 = GMm/2r. As you can see, the kinetic energy K of the satellite is inversely proportional to radius or distance r. Therefore, K decreases by a factor of 2 when r increases by a factor of 2, and K₁/2 = 2r.

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The speed of a 10 g bullet is 31 m/s if the block's mass is 2.2 kg and the spring, with k = 60 N/m, was compressed by 40 cm.

The elastic potential energy that is stored in the spring after being compressed by the bullet can be used to determine the bullet's velocity.

1: Calculate the elastic potential energy that is stored in the spring when compressed by a distance of 40 cm. The elastic potential energy formula is PE = (1/2)kx².

Let's substitute the known values and solve for PE.

PE = (1/2)(60 N/m)(0.4 m)²

PE = 4.8 J

2: Assume that the bullet loses all of its kinetic energy to the spring and block system after being fired.

Therefore, the bullet's kinetic energy formula can be used to determine its velocity. The kinetic energy formula is KE = (1/2)mv².

Let's substitute the known values and solve for v.KE = PEKE = (1/2)mv²4.8 J = (1/2)(10 g)v²4.8 J = (1/2)(0.01 kg)v²v² = 960 m²/s²v = √960 m²/s²v = 31 m/s

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Answer: I believe it may be 18m/s I apologize if it isn't but have a great day :DDD

Answer:

Favorable sites include the tops of smooth, rounded hills; open plains and water; and mountain gaps that funnel and intensify wind. Wind resources are generally more favorable for electricity generation at higher elevations above the earth's surface