What happens to waves when they pass through a narrow opening?

Answer:

e = 0.46 m

Explanation:

From the laws of friction, frictional force, F is proportional to normal reaction, R.

F₁ = μR

where μ is coefficient of friction; R = mg and g = 9.8 ms⁻²

Also, from Hooke's law, extension, e, in an elastic spring is proportional to applied force.

F₂ = Ke

where K is force constant of the spring

Since the box is just about to move, the coefficient of friction involved is static friction.

The force on the spring equals the frictional force experienced by the box the box; F₁ = F₂

Ke = μR

e = μR/K

where μ = 0.65; R = 18 kg * 9.8 ms⁻²; K = 250 N/m

e = (0.65 * 18 * 9.8)/250

e = 0.46 m

Answer: hmm

Explanation:

hmmm

Answer:

A

Explanation:

Think about rubbing your hands together- the friciton produces heat

Answer:

same i just love helping people out

god bless you have a blessed day

Explanation:

Answer:

I do too

Explanation:

I like to help others especially if it has been filled in by struggling in a certain concept of a subject.

Do u agree?

The frequency range of electromagnetic waves of X-ray is 3 ×10¹⁶ Hz to  3 ×10¹⁹ Hz. The wavelength range of electromagnetic waves of X-ray is  0.01 nm t0 10 nm.

The electromagnetic spectrum of electromagnetic waves can be described as the range of frequencies of electromagnetic radiation and its wavelengths and photon energies. The electromagnetic spectrum have range from one Hertz to above 10²⁵ Hertz.

The wavelength of electromagnetic radiation lies in between 380 to 760 nm and is detected by the human eye and characterized as visible light.

Electromagnetic waves of each frequency band are known by different names; starting at the low frequency (long wavelength) end of the spectrum these are radio waves, microwaves, infrared (IR), visible light, UV, X-rays, and gamma rays at the high-frequency (short wavelength) end.

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Answer:

a.) L = 2.64 kgm^2/s

b.) V = 4.4 m/s

Explanation: Jessica stretches her arms out 0.60 m from the center of her body. This will be considered as radius.

So,

Radius r = 0.6 m

Mass M = 2 kg

Velocity V = 1.1 m/s

Angular momentum L can be expressed as;

L = MVr

Substitute all the parameters into the formula

L = 2 × 1.1 × 0.6 = 1.32kgm^2s^-1

the combined angular momentum of the masses will be 2 × 1.32 = 2.64 kgm^2s-1

b. If she pulls her arms into 0.15 m,

New radius = 0.15 m

Using the same formula again

L = 2( MVr)

2.64 = 2( 2 × V × 0.15 )

1.32 = 0.3 V

V = 1.32/0.3

V = 4.4 m/s

Her new linear speed will be 4.4 m/s

A mass is a fixed quantity of matter. The weight that mass feels depends on the Gravitational force acting on the mass.

Weight is the upward force a mass applies due to gravity. The strength of an object's gravitational pull, or its weight, can also be referred to as weight. Gravity is a factor in weight. An object's mass is the quantity of material that makes it up. Gravity has no effect on mass. Weight is the force of gravity acting on (drawing down) a particular object (or mass). We are aware that weight is the product of mass and the applied gravitational force. This means that W = MG, where w is the weight, M is the mass, and G is the gravitational force. This also means that "the weight of an object is directly proportionate to its mass" is another possible interpretation.

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Answer:

Explanation: 6 m / s , with the center of the ball leaving the racquet horizontally 2 . 37 m above the court surface. The net is 12 m away and 0 . 90 m high.

Heat generates energy when you melt a solid; as you heat up molecules, they move faster and begin to break apart into a liquid form.

The melting point is the point at which a substance transforms from a solid to a liquid.

The melting point of a liquid is the temperature at which it transforms from a solid to a liquid at atmospheric pressure. This is the point where the liquid and solid phases are in balance.

Heat generates energy when you melt a solid; as you heat up molecules, they move faster and begin to break apart into a liquid form.

The kinetic energy of the molecule is due to the movement of the molecule as the temperature of the system increases the melting point comes closer.

As the temperature increases the kinetic energy of the molecule increases.

Hence the energy, melting point, and temperature relatively affect each other.

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He started from point O . After traveled he reached at the same point O.

from the graph given which is attatched :

OA = 700m ab = 300 m bc = 400m

CD = 600m DE = 1200m EF = 300m and FO = 100m

total distance covered =  700+ 300 + 400 + 600 + 1200 + 300 + 100

= 3600m

hence he covered 3600m distance

since, he started from point O and after travelled he reaches the same point from where he started means the initial and final position is same

therefore the total displacement is zero

displacement = 0

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Answer:

340 m/s

At the temperature of 15 degrees Celsius, the velocity of sound is about 340 m/s in air.

Jupiter possesses a strong magnetic field due to a combination of factors. Its metallic hydrogen layer, formed under extreme pressure, acts as an excellent electrical conductor.

The planet's rapid rotation induces a dynamo effect, generating electric currents that amplify the magnetic field. Additionally, convection currents driven by a dense core and internal heat sources contribute to the dynamo process. Jupiter's magnetic field is approximately 14 times stronger than Earth's, making it one of the most powerful in the solar system. These characteristics, including the presence of metallic hydrogen, rapid rotation, and internal energy sources, contribute to the strength of Jupiter's magnetic field.

Jupiter has a strong magnetic field primarily due to its unique combination of characteristics. Several factors contribute to the strength of Jupiter's magnetic field:

1. Metallic Hydrogen: Deep within Jupiter's atmosphere, intense pressure and temperature conditions compress hydrogen into a metallic state. This metallic hydrogen layer is an excellent electrical conductor, generating and sustaining a powerful magnetic field.

2. Rapid Rotation: Jupiter rotates rapidly, completing a full rotation in around 10 hours. This fast rotation induces a dynamo effect, where the movement of conducting materials in its interior generates electric currents, amplifying the magnetic field.

3. Core Convection: Beneath the metallic hydrogen layer, Jupiter likely has a dense core composed of rock and metal. Convection currents driven by the heat released from the core can further enhance the magnetic field through the dynamo mechanism.

4. Internal Energy: Jupiter has a considerable internal heat source. Heat from the core, as well as heat generated by gravitational compression and the slow contraction of the planet, contribute to the energy available for the dynamo process that sustains the magnetic field.

The combination of these factors creates a self-sustaining magnetic field that extends around Jupiter. Its magnetic field is estimated to be about 14 times stronger than Earth's magnetic field, making it one of the strongest in the solar system.

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Jupiter has such a strong magnetic field due to its core, which is composed of metallic hydrogen, and the rapid rotation of the planet. The movement of the electrically conducting layer surrounding the core, combined with Jupiter's rotation, generates a powerful magnetic field. Additionally, the presence of Jupiter's moons further enhances its magnetic field.

Jupiter, the largest planet in our solar system, possesses a remarkably strong magnetic field. This magnetic field is generated by the planet's core, which is primarily composed of metallic hydrogen. The core is believed to be surrounded by a layer of liquid metallic hydrogen, which behaves like a metal and conducts electricity due to the extreme pressure and temperature.

The movement of this electrically conducting layer, combined with Jupiter's rapid rotation, creates a powerful magnetic field. The rotation of the planet causes the conducting layer to circulate, generating electric currents. These electric currents, in turn, produce a magnetic field.

Furthermore, Jupiter's magnetic field is strengthened by the presence of its extensive system of moons. These moons interact with the planet's magnetic field, inducing additional currents and contributing to the overall strength of the magnetic field.

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The scenario that best describes a relationship of commensalism is :

Birds feed off the insects that are stirred up from the grasses as cattle move through.

Commensalism is described as a long-term biological interaction in which members of one species gain benefits while those of the other species neither benefit nor are harmed.

A polar bear catches a seal for dinner is not a case of commensalism because the case of members of one species gain benefits while those of the other species neither benefit nor are harmed is not fulfilled here.

A tapeworm latches itself in the intestines of a rat, feeding off all the nutrients eaten by the rat is not a case of commensalism because the case of members of one species gain benefits while those of the other species neither benefit nor are harmed is not fulfilled here.

Hence, the scenario that best describes a relationship of commensalism is :

Birds feed off the insects that are stirred up from the grasses as cattle move through because  because the case of members of one species gain benefits while those of the other species neither benefit nor are harmed is fulfilled here.

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Complete question:

Which scenario describes a relationship of commensalism?

O A polar bear catches a seal for dinner.

O xpecker birds eat parasitic ticks off the backs of zebras.

O Atapeworm latches itself in the intestines of a rat, feeding off all the nutrients eaten by the rat.

O Birds feed off the insects that are stirred up from the grasses as cattle move through.

The "weight" of an object can be determined by multiplying its mass by the acceleration due to gravity of the Earth. The acceleration due to gravity on Earth is around 9.81 m/s².

Therefore, the weight of the space lander on Earth would be:Weight = Mass x Acceleration due to gravity= 600 kg x 9.81 m/s²= 5886 N (newtons)What is the "weight" of this space vehicle on Venus itself?The weight of the space lander on Venus can be determined using Newton's Law of Gravitation. Newton's Law of Gravitation states that every point mass in the universe attracts every other point mass with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers. F = G x (m₁m₂/d²)where F is the force of gravity G is the gravitational constant (6.67 x 10^-11 Nm²/kg²)m₁ is the mass of the first objectm₂ is the mass of the second objectd is the distance between the centers of the two objects Using the given values;Mass of space lander, m₁ = 600 kg

Mass of Venus, m₂ = 4.867 x 10²⁴ kg Diameter of Venus = 12,100 km or 1.21 x 10^7 meters (distance between the centers of the two objects)G = 6.67 x 10^-11 Nm²/kg²

F = ((m₁m₂)/d²) x G= (600 x 4.867 x 10²⁴)/(1.21 x 10^7)² x 6.67 x 10^-11

= 2364.19 N

Therefore, the weight of the space lander on Venus would be approximately 2364.19 N (newtons).

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The full-load current of a 25-horsepower, 480-volt, 3-phase, squirrel-cage induction motor is  Table 430.250.

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Answer:

This must be harder than it appears or I'm missing something, but as far as I know y=5

Explanation:

The centre of mass of the region is bounded by y=9-x^2 y=5/2x, and the z-axis is (3.5, 33/8). Formulae used to find the centre of mass are as follows:x bar = (1/M)*∫∫∫x*dV, where M is the total mass of the system y bar = (1/M)*∫∫∫y*dVwhere M is the total mass of the system z bar = (1/M)*∫∫∫z*dV, where M is the total mass of the systemThe region bounded by y=9-x^2 and y=5/2x, and the z-axis is shown in the attached figure.

The two curves intersect at (-3, 15/2) and (3, 15/2). Thus, the total mass of the region is given by M = ∫∫ρ*dA, where ρ = density. We can assume ρ = 1 since no density is given.M = ∫[5/2x, 9-x^2]∫[0, x^2+5/2x]dAy bar = (1/M)*∫∫∫y*dVTherefore,y bar = (1/M)*∫[5/2x, 9-x^2]∫[0, x^2+5/2x]y*dA= (1/M)*∫[5/2x, 9-x^2]∫[0, x^2+5/2x]ydA...[1].

The limits of integration in the above equation are from 5/2x to 9-x^2 for x and from 0 to x^2+5/2x for y.To evaluate the above integral, we need to swap the order of integration. Therefore,y bar = (1/M)*∫[0, 3]∫[5/2, (9-y)^0.5]y*dxdy...[2].

The limits of integration in the above equation are from 0 to 3 for y and from 5/2 to (9-y)^0.5 for x.Substituting the values and evaluating the integral, we get y bar = (1/M)*[(9-5/2)^2/2 - (9-(15/2))^2/2]= (1/M)*(25/2)...[3].

Also, the x coordinate of the center of mass is given by,x bar = (1/M)*∫∫∫x*dVTherefore,x bar = (1/M)*∫[5/2x, 9-x^2]∫[0, x^2+5/2x]x*dA= (1/M)*∫[5/2x, 9-x^2]∫[0, x^2+5/2x]xdA...[4].

The limits of integration in the above equation are from 5/2x to 9-x^2 for x and from 0 to x^2+5/2x for y.To evaluate the above integral, we need to swap the order of integration. Therefore, x bar = (1/M)*∫[0, 3]∫[5/2, (9-y)^0.5]xy*dxdy...[5].

The limits of integration in the above equation are from 0 to 3 for y and from 5/2 to (9-y)^0.5 for x.

Substituting the values and evaluating the integral, we get x bar = (1/M)*[63/8]= (1/M)*(63/8)...[6]Thus, the centre of mass of the region is bounded by y=9-x^2 y=5/2x, and the z-axis is (3.5, 33/8).

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The maximum speed they will reach is v = sqrt((2 * (9.0 × 10^9 Nm^2/C^2) * (1.6 × 10^(-19) C)^2) / ((0.750 × 10^(-9) m) * (1.67 × 10^(-27) kg))).

To determine the maximum speed the two protons will reach, we need to consider the electrostatic interaction between them. The protons are positively charged and will experience a repulsive force due to their like charges.

Distance between the protons (r) = 0.750 nm = 0.750 × 10^(-9) m

Charge of each proton (q) = +1.6 × 10^(-19) C (Coulombs)

Mass of each proton (m) = 1.67 × 10^(-27) kg

The electrostatic force between the protons can be calculated using Coulomb's Law:

F = (k * q^2) / r^2

where:

F is the electrostatic force

k is the electrostatic constant (9.0 × 10^9 Nm^2/C^2)

Using the force, we can calculate the maximum speed using the principle of conservation of energy. At the maximum separation, all the initial potential energy will be converted into kinetic energy.

The electrostatic potential energy at maximum separation (U) is given by:

U = (k * q^2) / r

The maximum kinetic energy (K) is equal to the potential energy at maximum separation:

K = U = (k * q^2) / r

At the maximum speed, all the potential energy is converted into kinetic energy, so:

K = (1/2) * m * v^2

where v is the maximum speed.

Setting the two equations for kinetic energy equal to each other:

(k * q^2) / r = (1/2) * m * v^2

Simplifying and solving for v:

v^2 = (2 * k * q^2) / (r * m)

v = sqrt((2 * k * q^2) / (r * m))

Plugging in the given values:

v = sqrt((2 * (9.0 × 10^9 Nm^2/C^2) * (1.6 × 10^(-19) C)^2) / ((0.750 × 10^(-9) m) * (1.67 × 10^(-27) kg)))

Calculating this expression will give us the maximum speed of the two protons.

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Answer:

When they are babies.  to get them familar with it

Explanation:

Pls choose brainliest.

Answer:

When they are babies

Explanation:

Because they could hear the words and laern them.

Answer: 80 blocks

Explanation:

Volume of freezer compartment, V1 = (40 X 40 X 20) cm^3

                                                            = 32000cm^3

Volume of ice cream block, V2 = (10 X 10 X 4) = 400 cm^3

No of ice cream blocks = V1/V2 = 32000/400 = 80

Answer:

The striped magnetic pattern develops because, as oceanic crust pulls apart, magma rises to the surface at mid-ocean ridges and spills out to create new bands of ocean floor. Later, after the planet’s magnetic field flips again, the next stripe of new ocean floor aligns its polarity.

Explanation:

hope this helps!

The wolf's kinetic energy is 2,500 joules, calculated using the formula KE = 0.5 × mass × velocity².

The kinetic energy of an object is the energy it possesses due to its motion.

It can be calculated using the formula KE = 0.5 × mass × velocity², where KE represents kinetic energy, mass is the object's mass in kilograms, and velocity is its speed in meters per second.

In this case, the mass of the wolf is 50 kg, and its velocity is 10 m/s.

Plugging these values into the formula, we get KE = 0.5 × 50 × (10)², which simplifies to KE = 0.5 × 50 × 100.

Therefore, the wolf's kinetic energy is 2,500 joules.

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Answer:

I believe that B is the right one.

Answer:

For example, when a car travels at a constant speed, the driving force from the engine is balanced by resistive forces such as air resistance and friction in the car's moving parts. The resultant force on the car is zero.

Explanation:

hope this helps

Answer:

zero

Explanation:

The acceleration of the car is zero, and and in this case the velocity is also zero. When your car is moving at constant velocity down a street, the net force must also be zero, according to Newton's First Law.

Answer:the sample of solid has less energy than the sample of gas

Explanation:

Apex

Answer:

Convex lens

hope that helps you

While there is no direct relationship between speed and thinking distance, higher speeds can result in longer thinking distances due to the increased reaction time needed by the driver.

The relationship between speed and thinking distance is not a direct one, as thinking distance is primarily influenced by the driver's reaction time rather than the actual speed of the vehicle. Thinking distance refers to the distance traveled by a vehicle during the driver's reaction time after perceiving a hazard.

However, there is an indirect relationship between speed and thinking distance in the sense that higher speeds generally result in longer thinking distances. When a vehicle is traveling at a higher speed, the driver needs more time to process information, make decisions, and react to potential hazards. Therefore, a higher speed can lead to a longer thinking distance.

It is important to note that thinking distance is just one component of the total stopping distance, which also includes braking distance. Braking distance is directly influenced by the speed of the vehicle. Higher speeds require longer braking distances to bring the vehicle to a stop.

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One of the main causes of fatalities in the commercial aviation sector is loss of airplane control while in flight. There are numerous causes of upsets in airplanes, but none of them are statistically significant.

Eliminating one cause of upsets won't definitely result in fewer fatalities and accidents involving loss of control. Reducing the number of upset causes requires ongoing training. Additionally, many environmental factors that cause upsets can't always be avoided, which makes avoidance the best course of action. Therefore, in order to recover an upset airplane, pilots must possess the requisite knowledge and abilities.

All makers of big, swept-wing commercial jet aircraft use the same aerodynamic concepts.

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