Light travels from air, index of refraction of 1.00, and is incident on water, index of refraction of 1.33. How will the light refract when it enters the water?

Answer:

Thus, the angle of reflection is 15 degrees.

Explanation:

Angle of incidence, i = 15 degrees

The angle of incidence is the angle between the normal to the mirror and the incident ray, the angle of reflection is the angle between the reflected ray and the normal to the mirror.

According to the laws of reflection, the angle of incidence is equal to the angle of reflection.

Thus, the angle of reflection = angle of incidence = 15 degrees

Answer:

Some of the work done on the cart became the cart’s potential energy, and some of the work was converted into heat by friction.

Explanation:

Here, some fraction of the work done by the student on the cart is converted to the potential energy of the cart it gained at the height.

Work done is the measure of the effectiveness of the force on making some displacement. It is the dot product of force and displacement. Work done like force is a vector quantity and have magnitude and direction.

When a force applied on a body results in a displacement, then it is said to be work is done on the body. The work done is numerically equal to the energy needed to displace the object.

Here, the force applied on the cart of 100 Kg results in a work done on the cart by pulling it to height. Where the energy equivalent to the work done is stored in the form its potential energy.  The potential energy

p = mgh

Some fraction of work done is stored as this energy while the remaining probably lost into the surroundings.

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Answer:

tenis

Tenis applies to each of Newton's 3 Laws of Motion because with the first law if a tenis ball is at rest it will stay at rest unless acted on by an unbalanced force which would be playing tenis in which it would stay in motion. The second law applies since the acceleration at which it is hit times the mass equals the force it has. The third law applies since when hitting a tenis ball back and forth with racquets the reaction may be equal or opposite

Answer:

a. Volts = current x resistance

Explanation:

Ohm's law states that at constant temperature, the current flowing in an electrical circuit is directly proportional to the voltage applied across the two points and inversely proportional to the resistance in the electrical circuit.

Mathematically, Ohm's law is given by the formula;

[tex] V = IR[/tex]

Where;

V represents voltage measured in voltage.

I represents current measured in amperes.

R represents resistance measured in ohms.

Hence, Ohm's law gives the relationship between voltage, current and resistance of an electric circuit.

Answer:

C. electron

Explanation:

This is because since the carbon atom has an atomic number of 6 and an electronic configuration of 2,4, it shares two pairs of electrons with two oxygen atoms with atomic number 8 and electronic configuration 2, 6.

The 4 electrons (two pairs of electrons) on the outermost shell of the carbon atom are shared one pair each for each oxygen atom, which enables the oxygen atom attain the stable octet configuration.

Also, the above reaction is a chemical reaction and not a nuclear reaction, so an alpha particle cannot be involved.

Answer:

a)[tex]V_b=6.1m/s[/tex]

b) [tex]\alpha=66.59 \textdegree[/tex]

Explanation:

From the question we are told that:

Width of river  [tex]W=240[/tex]

River speed [tex]V_r=4.8m/s[/tex]

Boat speed [tex]V_b=7.2m/s[/tex]

Boat Direction [tex]\theta= 33 \textdegree[/tex]

Generally the equation for Boat Velocity Vector is mathematically given by

By Resolving Co-Planar forces

 [tex]\=V_{br}=\=V_b-\=V_r[/tex]

 [tex]\=V_{br}=-7.2sin33i+7.2cos33j[/tex]

Therefore

 [tex]\={V_{b}}=\={V_{br}}-\={V_r}[/tex][tex]\=V_{b}=\=V_{br}-\=V_r[/tex]

 [tex]\=V_{b}=4.8-7.2sin33i+7.2cos33j[/tex]

 [tex]\=V_b=4.8-7.2 sin33 i+7.2 cos33j[/tex]

Therefore Magnitude of Boat velocity is

 [tex]V_b=\sqrt{(4.8-7.2sin33)^2+(7.2cos33j)^2}[/tex]

 [tex]V_b=6.1m/s[/tex]

b)

Generally the equation for Direction of the boat's velocity is mathematically given by

 [tex]\alpha=tan^{-1}\frac{y}{x}[/tex]

 [tex]\alpha=tan^{-1}\frac{7.2cos33)}{4.8-7.2sin33}[/tex]

 [tex]\alpha=66.59 \textdegree[/tex]

Answer:

When a ray of light, passes from a denser to a rarer medium with the angle of incidence greater than the critical angle, the ray is reflected back into the same medium. This phenomenon is call total internal reflection.

Answer:

a) in uniform motion

Explanation:

When velocity-time graph is parallel to x-axis, it shows that the object is moving with constant velocity. or we can say that that the object is moving with uniform motion. There is no change in velocity. It covere equal distance in equal intervals of time.

Hence, the correct option is (a) "in uniform motion".

Answer:

Explanation:

This is true because the definition of work is the parallel force required to move an object times the distance it moves. If it doesn't move, no work has been done. That is not to say that no energy has been expended, because it most certainly has! But that is not the same thing.

The velocity of the rock just before it hits the ground is approximately 23.87m/s.

From the third equation of motion;

v² = u² + 2gs

Where u is initial velocity, v is final velocity, g is acceleration due to gravity ( g = 9.8m/s² ) and s is distance covered.

Given the data in the question;

To determine the final velocity, plug the given values into the equation of motion above.

v² = u² + 2gs

v² = ( 3.61m/s )² + ( 2 × 9.8m/s² × 28.4m )

v² = 13.0321m²/s² + 556.64m²/s²

v² = 569.6721m²/s²

v = √( 569.6721m²/s²)

v = 23.87m/s

Therefore, the final velocity of the object is 23.87m/s.

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[tex]\tt\red{See \; Your \: Answer!}[/tex]

Your answer was 0.67m...

Answer:

the velocity is 0.45 m/s and it is moving in the opposite direction

or

-0.45 m/s

Explanation:

The law of conservation of momentum says that  initial momentum = final momentum

( mass x velocity of the dog ) = - (mass x velocity of the canoe)

(15 x 1.2) =- (40 x velocity of the canoe)

Velocity of the canoe = -(15 x 1.2) / 40 = -0.45 m/s

Answer:

8.575 m

Explanation:

speed = distance/time

distance -- 2d

343 = 2d/0.05

2d = 17.15

d = 17.15/2

d = 8.575

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Answer:

40°Fahrenheit= 4.44°Celsius

Answer:

the color is red.

Answer:

1. Cellular respiration is the process in which cells break down glucose, release the stored energy, and use it to make ATP. The process begins in the cytoplasm and is completed in a mitochondrion. Cellular respiration occurs in three stages: glycolysis, the Krebs cycle, and electron transport.

2. How much ATP is produced in all three stages combined? Glycolysis produces 2 ATP molecules, and the Krebs cycle produces 2 more. Electron transport from the molecules of NADH and FADH2 made from glycolysis, the transformation of pyruvate, and the Krebs cycle creates as many as 32 more ATP molecules.

3. Photosynthesis converts carbon dioxide and water into oxygen and glucose. ... Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by- products and ATP is energy that is transformed from the process.

4. Aerobic respiration takes place in presence of oxygen; whereas anaerobic respiration takes place in absence of oxygen. Carbon dioxide and water are the end products of aerobic respiration, while alcohol is the end product of anaerobic respiration. Aerobic respiration releases more energy than anaerobic respiration.

Answer:

Her final velocity at she moves over the the bottom of the ramp is approximately 1.20204 m/s

Explanation:

The data of the energy used by the person in the wheel chair are;

The work done by the person, W = 70.8 J

The initial position of the wheel chair = At the bottom of the ramp

The time the person takes to do the work, t = 1.00 s

The number of turns she turned the wheel chair = 1/4 turns

The radius of the wheel of the wheel chair, r = 40 cm

The mass of her and the wheel chair, m = 98.0 kg

By the conservation of energy principle, we have;

The total mechanical energy of the motion, M.E. = The amount of work done by her in moving up the ramp = 70.8 J

M.E. = P.E. + K.E. = Constant

Where;

P.E. = Potential energy

K.E. = Kinetic energy

At the height she reached the ramp, M.E. = P.E. = 70.8 J

At the bottom of the ramp, P.E. = 0 J, therefore;

K.E. = 70.8 J

We have;

K.E. = (1/2)·m·v²

Where;

m = The mass of her and the wheelchair = 98.0 Kg

v = Her final velocity at the bottom of the ramp

By substitution, we have;

70.8 J =  (1/2) × 98.0 Kg × v²

v² = 70.8/((1/2) × 98.0) = 354/245

v = √(1,770)/35 ≈ 1.20204

Her final velocity as she passed back over the bottom of the ramp, v ≈ 1.20204 m/s.

Answer:

B. It decreases proportionally to the wavelength

Explanation:

The relationship between wavelength, velocity, and frequency of a wave is given as;

[tex]f = \frac{v}{\lambda}[/tex]

where;

f is the frequency of the wave

v is the velocity of the wave

λ is the wavelength

From the equation above, the frequency of a wave is inversely proportional to its wavelength. As the wavelength increases, the frequency decreases and vice versa.

Therefore, the correct option is "B"

B. It decreases proportionally to the wavelength

Answer: Refraction

Explanation: When a light wave hits a glass of water the wave bends to make it look side ways

Explanation:

The natural environment or natural world encompasses all living and non-living things occurring naturally, meaning in this case not artificial. The term is most often applied to the Earth or some parts of Earth

Answer:

yes

Explanation:

Reactions of acids with metals

Acids react with most metals and, when they do, a salt is produced. But unlike the reaction between acids and bases, we do not get water. Instead we get hydrogen gas.

This is the general word equation for the reaction:

metal + acid → salt + hydrogen

For example, magnesium reacts with hydrochloric acid to produce magnesium chloride:

magnesium + hydrochloric acid → magnesium chloride + hydrogen

Mg + 2HCl → MgCl2 + H2

It doesn't matter which metal or which acid is used, if there is a reaction we always get hydrogen gas as well as the salt. However, how quickly the reaction goes depends on the metal used and how high up in the reactivity series it is.

Answer:

no

Explanation:

Answer:

It's nitrogen. Specifically, this is the alpha emission of an N-15 isotope.

m = 43.2 kg

Explanation:

volume of sphere = (4/3)pi(r)^3

= (4/3)(3.14)(2 m)^3

= 33.5 m^3

density = mass/volume

or solving for mass m,

m = (density)×(volume)

= (1.29 kg/m^3)(33.5 m^3)

= 43.2 kg

The weight of air inside this spherical balloon is equal to 423.75 Newton.

Given the following data:

To determine the weight of air inside this spherical balloon:

First of all, we would calculate the volume of this spherical balloon by using this formula:

[tex]Volume = \frac{4}{3} \pi r^3\\\\Volume = \frac{4}{3} \times 3.142 \times 2^3\\\\Volume = \frac{32 \times 3.142}{3}[/tex]

Volume = 33.52 cubic meters.

Next, we would calculate the mass of air contained in this spherical balloon:

[tex]Mass = density \times volume\\\\Mass = 1.29 \times 33.52[/tex]

Mass = 43.24 kg

For the weight of air:

[tex]Weight = mg\\\\Weight = 43.24 \times 9.8[/tex]

Weight = 423.75 Newton

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Answer:

Fossil fuels store energy from the sun as

Explanation:

Answer:The true statements about generators would be :

They convert motion energy to electric energy

           They use the relative motion of a magnet and a coil of wire.

Explanation:

Generators use the energy of the rotating coil in relative motion with magnets to induce a current within the wire. Generators are devices that convert energy into a voltage by the relative motion of the magnet and a coil that changes flux.