Total Internal Reflection
Each critical angle of the prisms is 42°.How the direction of light to reflect ?​

Answer:

Every action has an equal and opposite reaction.

Explanation:

Answer:

An action-reaction force pair

Explanation:

Answer: Electromagnetic waves can transfer energy through empty space.

Explanation:

Electromagnetic waves are formed when an electric field comes in contact with a magnetic field. The electric field and magnetic field of an electromagnetic wave are perpendicular to each other. They are also perpendicular to the direction of the wave.

Electromagnetic waves travel with speed of light in vacuum.

Electromagnetic wave does not need a medium to propagate or travel from one place to another. Electromagnetic waves are 'transverse' waves which means that they are measured by their amplitude and wavelength.

Electromagnetic waves do not lose energy when they travel and thus can travel far from its source.

Answer:

C.

Electromagnetic waves can transfer energy through empty space.

Explanation:

cause i dont need one

Answer:

0.5 N

Explanation:

(0.6 kg)(9.8 m/s^2) = 5.88 N

(0.6 kg)(5 m/s^2) = 3 N

4 N - 3 N = 1 N

1 N/5.88 N = 0.17

(0.17)(3 N) = 0.51 N which rounds to 0.5 N

When a 4 N force pulls on the cart, the cart accelerates at 5 m/s². The frictional force resisting the pull is 0.5 N.

Friction is defined as the force preventing sliding solid surfaces, fluid layers, and material components from moving relative to one another. When two bodies in contact move in relation to one another, friction, a resistive force, arises. friction factors Between-body surface adhesion: When two materials are in close proximity to one another, a molecular force called adhesion is created.

(0.6 kg) (9.8 m/s²2) = 5.88 N

(0.6 kg) (5 m/s²2) = 3 N

4 N - 3 N = 1 N

1 N/5.88 N = 0.17

(0.17) (3 N) = 0.51 N ≅ 0.5 N

Thus, when a 4 N force pulls on the cart, the cart accelerates at 5 m/s². The frictional force resisting the pull is 0.5 N.

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Answer:

First law: kinetic energy is used to turn an electric generator

Second law: some thermal energy is lost to the environment as it travels through the system

Explanation:

The first law of thermodynamics is known as the law of conservation of energy. It states that energy can neither be created nor destroyed but can only be transferred or changed from one form to another. When thermal energy is used to generate electricity, the kinetic energy of the steam is used to turn the electric generator (thereby producing electrical energy).

The second law of thermodynamics states that energy transfer or transformation leads to an increase in entropy resulting in the loss of energy. This law also states that as energy is transferred or transformed, some is lost in a form that is unusable. When thermal energy is used to generate electricity, some of the thermal energy is lost to the environment as it travels through the system.

Answer:

NOT A

Explanation:

Sorry I couldn't guess it right. Source EDGEN

Answer:

2.66secs

Explanation:

To get the time it will take to reach the ground, we will use the equation of motion;

S = ut + 1/2at²

S is the distance

u is the initial velocity

g is the acceleration due to gravity

Given

S = 30m

u = 0m/s

Let's get the acceleration

According to newton's second law;

[tex]\F_x = ma_x\\F_m - F_f = ma_x\\mgsin \theta - 0 = ma_x\\gsin\theta = a_x\\a_x = 9.8sin 60\\a_x = 9.8(0.8660)\\a_x = 8.49m/s^2[/tex]

Get the required time:

Recall that: S = ut + 1/2at²

Substitute the given parameters and find t

30 = 0(t) + 1/2(8.49)t²

30 = 4.24t²

t² = 30/4.24

t² = 7.08

t = √7.08

t = 2.66secs

Hence it take the box 2.66seconds to reach the ground

Answer:

5(2)+5(7)

Explanation:

5(2)+5(7)=10+35=45

Answer:

1 mole = 767.882 g

1 gram = 0.001 mole

Explanation:

The molar mass of CeAl₁₂O₁₉ is 770.686grams. The molar mass of a substance is the amount of substance which is present in one mole of the compound.

Molar mass of a substance is the mass in grams of one mole of the compound or chemical substance. In a chemical substance, the amount of entities which are present such as atoms, molecules, ions, is defined as a mole. A mole of any substance has 6.022 × 1023 molecules in it.

The molar mass of CeAl₁₂O₁₉  can be calculated as it is made up of three atoms which are Ce (Cerium), twelve atoms of Aluminium (Al), and nineteen atoms of O (Oxygen).

Atomic mass of Cerium = 140.116u

Atomic mass of Aluminium = 26.981539 u

The mass of 12 Aluminium atoms = 12 × 26.98 u

The mass of 12 Aluminium atoms = 323.76 u

Atomic mass of Oxygen =  15.999 u

The mass of 19 atoms of Oxygen = 303.81 u

Therefore, the mass of CeAl₁₂O₁₉ = 140.116 u + 323.76 u + 303.81 u

The molar mass of CeAl₁₂O₁₉ is 770.686 grams.

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Answer: A suspension is a heterogeneous mixture in which some of the particles settle out of the mixture upon standing. The particles in a suspension are far larger than those of a solution, so gravity is able to pull them down out of the dispersion medium (water).

Explanation:

Answer:

Maximum height = 1.27 m

Explanation:

Given:

θ = 30°

Speed = 10 m/s

Find:

Maximum  height

Computation:

Maximum height = v²(sinθ)² / 2g

Maximum height = 10²(sin30)² / (2x9.81)

Maximum height = 1.27 m

Answer:

Power = 1200 [W].

Explanation:

The efficiency of an electrical equipment is defined as the relationship between the power realized, over the power that is consumed. For this case, they give us the data of consumed power and efficiency in this way we can calculate the power that the equipment performs.

[tex]Efficency=\frac{Power_{done}}{P_{consumed}}\\0.8 = \frac{Power_{done}}{1500} \\Power_{done}=1500*0.8\\Power_{done} = 1200 [W][/tex]

This means that of the 1500 [W], 1200 [W] are actually used to get the job done. This is established by means of the first law of thermodynamics.

Answer:

a is correct

The particles will move up and down over large areas.

Answer:

B. The particles will move up and down over small areas.

Explanation:

I just took the quiz and got 100% :)

Answer:

No not at all

Explanation:

Answer:

Hard-boiled eggs don't react well (or, depending on the perspective, react extremely well) to microwaves. Heat one up in a microwave and — assuming it doesn't burst

so yeah it does not explode

Answer:

mgh = GPE

Explanation:

2.3×3.25

7.475J

Answer:

The correct option is;

Still constant

Explanation:

The relative refractive index ₁n₂ between the two medium can be as follows;

[tex]_1n_2 = \dfrac{The \ speed \ of \ light \ in \ medium \ 1}{The \ speed \ of \ light \ in \ medium \ 2} = \dfrac{c_1}{c_2}[/tex]

Therefore, given that the speed of light in medium 1 is constant and the speed of light on medium 2 is also constant, the relative refractive index ₁n₂ = c₁/c₂ is always constant.

Assuming a constant force, and hence a constant acceleration a, we have by Newton's second law,

4.0 N = (1.2 kg) a   →   a = (4.0 N) / (1.2 kg)

and by definition of average velocity,

a = (5.0 m/s - 2.0 m/s) / t

where t denotes the time for which the force is applied.

So,

(4.0 N) / (1.2 kg) = (3.0 m/s) / t   →   t = (3.0 m/s) (1.2 kg) / (4.0 N) = 0.90 s

Answer:

Toward the normal line

Explanation:

I had the same question on a quiz

Answer:

v=68[m/s]

Explanation:

To solve this problem we have to use the law of energy conservation, which tells us that potential energy is converted into kinetic energy.

[tex]E_{pot}=E_{kin}[/tex]

[tex]E_{pot}=m*g*h[/tex]

[tex]E_{kin}=0.5*m*v^{2}[/tex]

where:

m = mass [kg]

g = gravity acceleration = 9.81 [m/s²]

h = elevation = 236 [m]

v = velocity [m/s]

[tex]m*9.81*236=0.5*m*v^{2}\\2315.16 = 0.5*v^{2}\\v=\sqrt{4630.32} \\v=68[m/s][/tex]

Answer:

The cells of each contain exactly the same parts.​

Explanation:

Three different organisms are involved in this question viz: pollen, bee and flowering plant. According to the question, they are all living organisms, which means that they all contain one or more cells.

Although they all have cells but the cells of each does not contain exactly the same parts.​ Bee is an animal while pollen produced by the flowering plants are plants, hence, the parts/organelles contained in each cell of the mentioned organisms are mentioned.

Answer:

Radioactive Decay

Explanation:

Answer:

39850.785 J

Explanation:

0.5 x m x v^2

0.5x13x78.3^2

Answer:

KE =

[tex] \frac{1}{2} m {v}^{2} \\ [/tex]

Explanation:

[tex]ke = \frac{1}{2} m {v}^{2} \\ = \frac{1}{2} \times 13 \times {78 . 3}^{2} \\ ke = 39850.785j \\ [/tex]

Answer:

traping

Explanation:

Answer:

B. Trapping

Explanation:

Answer: 500 ft

Explanation:

High beam headlights help one to see better at night as the range of vision is greatly expanded. They can however, blind drivers coming on the opposite lane.

It is therefore prudent to ensure that when using high beam headlights, you dim them when a car is coming towards you. The appropriate distance to do so is a minimum of 500 ft from the car.

Answer:

Q = 78375 [J]

Explanation:

To solve this problem we must use the following ideal equation for the thermal energy of an element or substance depending on the temperature change.

[tex]Q=m*C_{p}*(T_{final}-T_{initial})[/tex]

where:

Q = heat [J]

m = mass = 0.25 [kg]

Cp = specific heat = 4180 [J/kg*C]

Tinitial = 25[°C]

Tfinal = 100 [°C]

[tex]Q =0.25*4180*(100-25)\\Q = 78375 [J][/tex]

Answer:

Work and power​  is described below in complete details.

Explanation:

Work is described as the method of energy change to the movement of an object through the employment of force. This is ordinarily expressed as the outcome of power and displacement. The SI unit of work is Joule. Power is described as the quantity of energy conveyed in unit time. Power is a measure of the amount of work performed per unit of time.

Answer:15

Explanation:

Answer:

Average speed of the car = 16.53 m.s

Explanation:

For first 5 seconds:

As the car starts from rest, so the initial speed of the car, u=0

Acceleration, a= 4 m/s^2

So, the final speed (speed at time, t=5 second)

v=u+at

v=0 + 4 x 5 = 20 m/s

Distance covered,

[tex]s=ut+\frac 1 2 a t^2 \\\\s=0+\frac 1 2 \times 4 \times 5^2[/tex]

s=50 m

As the car maintained the constant speed of 20 m/s for the next 10 seconds.

Distance traveled in 10 seconds, d=20 x 10 =200 m

For the last 4 seconds:

The car slows down at the rate of 2.0 m / s ^ 2 from the speed of 20 m/s.

As the car slows down, so the acceleration will be negative, i.e a=-2 m/s^2

[tex]s=ut+\frac 12 at^2 \\\\s=20\times 4 +\frac 12 (-2)4^2[/tex]

s=80-16=64 m.

Considering all three cases, the total distance covered=

=50+200+64=314 m

Total time= 5+10+4=19 s

So, the averate peed= Totat distance covered / total time taken

=314/19=16.53 m/s