A ray of light (f = 5.09 × 1014 Hz) is traveling through a mineral sample that is submerged in water. The ray refracts as it enters the water, as shown in the diagram below.
Calculate the absolute index of refraction of the mineral

For a surfacing whale in an aquarium produces water wave crests every 0.40 seconds.is mathematically given as

w= 1.8m

Generally, the equation for is mathematically given as

w=V*T

Therefore

w=V*T

w=4.5 m/s*0.40s

w= 1.8m

In conclusion,  the wavelength of the wave

w= 1.8m

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As waves approach the shore, they refract so as to impact the shore in a nearly parallel manner.

This is a type of mechanical wave and requires a medium for its propagation which in this case is water.

This type of wave refract and impact the shore in an almost parallel manner hence option D being chosen.

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I hope this woll work.Best of luck.Sorry of the answer ia wrong

Answer:

The air is contained at a high pressure in the tube. When it escapes from a small orifice, it suddenly expands. A large amount of its heat is absorbed in the process of expansion resulting in considerable fall in its temperature. This is why the escaping air feels cold.

Answer:

4.7 m³

Explanation:

We'll use the gas law P1 • V1 / T1 = P2 • V2 / T2

* Givens :

P1 = 101 kPa , V1 = 2 m³ , T1 = 300.15 K , P2 = 40 kPa , T2 = 283.15 K

( We must always convert the temperature unit to Kelvin "K")

* What we want to find :

V2 = ?

* Solution :

101 × 2 / 300.15 = 40 × V2 / 283.15

V2 × 40 / 283.15 ≈ 0.67

V2 = 0.67 × 283.15 / 40

V2 ≈ 4.7 m³

(a) The net force on the shopping cart is zero.

(b) The the force of friction on the shopping cart is 25 N.

(c) When same force is applied to the shopping cart on a wet surface, it will move faster.

The net force on the shopping cart is calculated as follows;

F(net) = F - Ff

where;

ma = F - Ff

where;

at a constant velocity, a = 0

0 = F - Ff

F(net)  = 0

F = Ff = 25 N

Net force is zero, and frictional force is equal to applied force.

Coefficient of kinetic friction of solid surface is greater than that of wet surface.

Since frictional force limit motion, when the frictional force is smaller, the object tends to move faster.

Thus, the cart will move faster on a wet surface due to decrease in friction.

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Answer:

Gravity changes with altitude. as we know The gravitational force is proportional to 1/R2, where R is your distance from the center of the Earth.

eg. The radius of the Earth at the equator is 6400 kilometers.

Let's say you were in a jet at the equator that was 40 kilometers high above the earth's surface.

may be helpfull

The rotation of the electric motor in one direction is because the commutator frequently reverses the direction of the current in the loop of wire.

An electromagnet is a device which works on the principle of electromagnetism.

Electromagnetism is the force produced due to an interaction of the electric and magnetic fields.

An example of an electromagnet is the electric motor.

In an electromagnet, the rotation of the motor in one direction is because the commutator frequently reverses the direction of the current in the loop of wire.

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Electromagnet in a motor must rotate consistently in just one direction because of the movement of permanent magnet.

A Lorentz force is generated by the current and the magnetic flux of the permanent magnet in the same direction when the movement of the permanent magnet occur.

So we can conclude that Electromagnet in a motor must rotate consistently in just one direction because of the movement of permanent magnet.

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Answer:

False

Explanation:

In the linear equation y = mx + b, b is the y-intercept and mx is the slope.

Answer:

Geothermal energy can heat, cool, and generate electricity: Geothermal energy can be used in different ways depending on the resource and technology chosen—heating and cooling buildings through geothermal heat pumps, generating electricity through geothermal power plants, and heating structures through direct-use

Explanation:

geothermal energy, form of energy conversion in which heat energy from within Earth is captured and harnessed for cooking, bathing, space heating, electrical power generation, and other uses. Heat from Earth's interior generates surface phenomena such as lava flows, geysers, fumaroles, hot springs, and mud pots.

Answer:

Explanation:

1800x0.9=1620kg

The acceleration of the cart is low with the low fan speed because acceleration depends on speed.

The acceleration of the cart with the low fan speed is also lower because acceleration depends on the velocity or speed of an object. If speed is lower, the body moves very slow and the acceleration is also low and vice versa.

So we can conclude that the acceleration of the cart is low with the low fan speed because acceleration depends on speed.

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When we apply pressure on the one side of balloon the other side bulges out due to the movement of gas to other side.

If we press one side of the balloon, the other side bulges out because the gas that present on one side moves to the other side where there is no pressure. The body of balloon is elastic so when we apply pressure the other side bulges out.

So we can conclude that when we apply pressure on the one side of balloon the other side bulges out due to the movement of gas to other side.

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Forensic scientists can often provide an estimated time of death. Option C is correct.

By gathering and evaluating evidence, forensic science specialists support criminal investigations. Numerous technicians focus on either laboratory analysis or crime scene investigation.

Often, forensic experts can approximate the time of death.

Hence, the right answer is C.

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The magnetic field (positive magnitude only, no direction) at point p is further explained below.

B=1.89*10^{-6}

Generally, the equation for magnetic field is mathematically given as

[tex]B= \frac{\mu0}{2\pi}*\frac{I1}{r1}[/tex]

Therefore

[tex]B1= \frac{2*10^{-7}(10)}{240}[/tex]

B1=1*10^{-6}T

and

[tex]B2= \frac{2*10^{-7}(10)}{1.25}[/tex]

B2=1*10^{-6}T

In conclusion,

[tex]B=\sqrt{B1^2+B2^2}[/tex]

B=1.89*10^{-6}

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The evidence that a magnetic field is also present is the paper clips get attracted to the rod.

It is the region of space where an object experiences magnetic force either attracted or repelled.

The voltage provides the push for an electric current within the electromagnet. The paper clips placed nearby will get attracted towards the magnetic material rod.

Thus, this give an evidence that magnetic field is also present.

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Answer:

it would take 100s for the train to crossthe bridge

Five locations are marked on the world map. The spot that is prone to hurricane mostly A.

A hurricane is a cyclone with winds of 74 miles (119 kilometers) each hour or more prominent that is typically joined by downpour, thunder, and lightning, and that occasionally moves into calm scopes.

The locations on the world map spot A, B, C, D, E are regions with country prone to hurricane.

The SPOT A, is GULF of Mexico, a sea bowl nearer to the Atlantic sea, encompassed with the North American landmass, the Hawaiian island is likewise inside that locale.

The SPOT B, is the southern Pacific sea with nations like BRAZIL, PERU, ECUADOR, CHILE, in that equivalent locale. This is likewise visited by the tropical storm.

The SPOT C, is inside the locales of AFRICA, nations at the edge are likewise impacted by typhoon.

The SPOT D, is Asian landmass with Russia at the edge. They are likewise inclined to typhoon.

The SPOT E, is the North Pacific sea locale situated at the upper left hand side of the world guide, with nations like Canada, Alaska and co. Near the artic circle.

Thus, location A is the most prone to hurricanes.

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I believe the answer is A. a

I've done the test, 16/16

Answer:

B) Settling a dispute or disagreement

Explanation:

A conflict is a disagreement or argument between opposing parties.

A resolution is a solution to a problem.

Knowing both these definitions, the answer choice that makes the most sense would be B) Settling a dispute or disagreement.

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(a) The velocity of the first ball before the collision with the second ball is 11.18 m/s.

(b) The final velocity of the two balls after the collision is determined as 5.59 m/s.

The speed of the block when pushed by the spring is calculated as follows;

K.E = Ux

¹/₂mv² = ¹/₂kx²

mv² = kx²

v² = kx²/m

v² = (25 x 0.5²)/0.05

v² = 125

v = 11.18 m/s

The velocity of the two balls after the collision is calculated as follows;

Pi = Pf

where;

m1u1 + m2u2 = v(m1 + m2)

0.05(11.18) + 0.05(0) = v(0.05 + 0.05)

0.559 = 0.1v

v = 5.59 m/s

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To increase the acceleration of the car using the same engine, the   mass of the car must be decreased.

Newton's first law of motion states that an object at rest or uniform motion in a straight line will continue in that path unless acted upon by an external force.

The first law is also called the law of inertia because it depends on the mass of the object. The greater the mass, the greater the inertia and more reluctant the object will be to move.

Thus, to increase the acceleration of the car using the same engine, the   mass of the car must be decreased.

a = F/m

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Taking into account the definition of speed, the average speed of the Olympic sprinter is 10 [tex]\frac{m}{s}[/tex].

Speed ​​is a physical quantity that expresses the relationship between the space traveled by an object and the time used for it.

In other words, speed can be defined as the amount of space traveled per unit of time with which a body moves and can be calculated using the expression:

[tex]speed=\frac{distancetraveled}{time}[/tex]

In this case, you know:

Replacing these values ​​in the speed definition:

[tex]speed=\frac{100 m}{10 s}[/tex]

Solving:

speed= 10 [tex]\frac{m}{s}[/tex]

In summary, the average speed of the Olympic sprinter is 10 [tex]\frac{m}{s}[/tex].

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Answer: the airy pattern can only arise from wave propagation

Explanation:if particles went in straight lines through a slit, they would progate linearly and not interfere. The airy pattern arises from diffraction as waves interfere, producing peaks (constructive interference where peaks of waves from each slit coincide) and troughs (destructive interference where peaks and troughs of waves from each slit cancel out). If intensity rather than field is measured nodes occur where 0 values line up instead of troughs

Answer:

C

Explanation:

The answers include the following:

This is defined as the standard unit for measuring the length of a body and is denoted as m.

Height is a vertical type of length which is why meter was chosen as the most appropriate choice.

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Answer:

‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Explanation:

yes, correct, from the batteries, wires and bulbs. in short, from everything that is part of the circuit.

electricity is just a push on mostly already existing electrons to move along.

a battery has a surplus of electrons at the "-" pole, and an electron deficiency at the "+" pole. that creates an electromagnetic "pressure" (voltage), the surplus (ampere) squeezes into the circuit, while the deficiency pulls like a vacuum, and all that creates an electromagnetic field around the whole circuit, which moves also the existing electrons, pushing/sucking electrons at the end of the circuit "chain" into the "+" pole.

The acceleration of all objects increases when there is no air resistance because air resistance slow down the speed of an object.

The rate of change in velocity over time is known as acceleration. Velocity is the speed of an object in a specific direction. Acceleration occurs when change occurs in velocity.

So we can conclude that the acceleration of all objects increases when there is no air resistance because air resistance slow down the speed of an object.

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The velocity of two cars after the collision will be 6 m/sec.The momentum of the body is given by the product of the mass and velocity of the body.

According to the law of conservation of momentum, the momentum of the body before the collision is always equal to the momentum of the body after the collision.

According to the law of conservation of momentum

Momentum before collision =Momentum after collision

[tex]\rm m_1v_1+m_2v_2=(m_1+m_2)V \\\\\ 24000 \ kg \times 8 m/sec+8000 \ kg \times 0 m/sec=(24000+8000)V\\\\ V= 6 m/sec[/tex]

Hence, the velocity of two cars after the collision will be 6 m/sec.

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