. A ray of light traveling in transparent material 1 with index of refraction n 1
​
=1.20 makes an angle θ 1
​
=51.0 ∘
with the normal to a flat interface with transparent material 2, which has index of refraction n 2
​
=1.70, as shown. What is the angle of refraction θ 2
​
? A. 68.1 ∘
B. 37.5 ∘
C. 29.1 ∘
D. 33.3 ∘

Answer:

Testing

Explanation:

This is basically asking you what the next step of the scientific method is. First, you would ask a question. Next, you would research that question to get some background information. Once you have that information, you would create a hypothesis (typically "If..., then..., because..." format). Then you would conduct an experiment to test your hypothesis. Then you would gather data, draw conclusions, and see if your hypothesis was correct.

Hope this helps!

The pace at which an object's location changes, measured in metres per second, is referred to as speed. The formula for speed is straightforward: distance divided by time.

To find the speed of the object at time t = 2.00 s, we need to first find the velocity of the object at t = 2.00 s by taking the derivative of the position vector with respect to time:

v⃗ = d/dt (r⃗) = [5.00 m/s] i^ − [6.00 m/s] j^

Then, we can find the magnitude of the velocity, which is the speed:

|v⃗| = √(v_x^2 + v_y^2) = √[(5.00 m/s)^2 + (-6.00 m/s)^2] = 7.80 m/s

Therefore, the speed of the object at time t = 2.00 s is 7.80 m/s. To format the equation:

$$\vec{r} = [2.0 \text{ m} + (5.00 \text{ m/s})t] \hat{\textbf{i}} + [3.0 \text{ m} - (3.00 \text{ m/s}^2)t^2] \hat{\textbf{j}}$$

$$\vec{v} = \frac{d\vec{r}}{dt} = [5.00 \text{ m/s}] \hat{\textbf{i}} - [6.00 \text{ m/s}] \hat{\textbf{j}}$$

$$|\vec{v}| = \sqrt{v_x^2 + v_y^2} = \sqrt{(5.00 \text{ m/s})^2 + (-6.00 \text{ m/s})^2} = 7.80 \text{ m/s}$$

To find the speed of the object at t = 2.00 s, we first need to find the velocity vector by taking the derivative of the position vector with respect to time, t.

The given position vector is:
\( \vec{r} = (2.0 + 5.00t) \hat{i} + (3.0 - 3.00t^2) \hat{j} \)

Taking the derivative with respect to time, t:
\( \vec{v} = \frac{d \vec{r}}{dt} = (5.00) \hat{i} + (- 6.00t) \hat{j} \)

Now, plug in t = 2.00 s:
\( \vec{v}(2.00) = (5.00) \hat{i} + (- 6.00 \cdot 2.00) \hat{j} = (5.00) \hat{i} + (- 12.0) \hat{j} \)

The speed is the magnitude of the velocity vector:
\( speed = |\vec{v}(2.00)| = \sqrt{(5.00)^2 + (-12.0)^2} = \sqrt{169} = 13.0 \, m/s \)

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The values of the density, volume and masses are:

Density is defined as the ratio of mass and volume of  a substance.

The given data is as follows:

Mass of empty density bottle = 43.2 g

Mass of density bottle full of water = 66.4 g

Mass of density bottle with some sand = 67.5 g

Mass of density bottle with the sand

filled up with water = 82.3 g:

(a) mass of water that completely filled the bottle = 66.4 - 43.2

mass of water that completely filled the bottle = 23.2 g

(b) volume of water that completely filled the bottle = mass/density

density of water = 1 g/cm³

volume of water that completely filled the bottle = 23.3 g/1 g/cm³

volume of water that completely filled the bottle = 23.2 cm³

(c) volume of the density bottle = 23.2 cm³

(d) mass of sand = 67.5 g - 43.2 g = 24.4 g

(e) mass of water that filled the space above the sand = 82.3 - 67.5 = 14.8 g

(f) volume of sand = volume of bottle - volume of water

volume of water = 14.8 cm³

volume of sand = 23.2 cm³ - 14.8 cm³

volume of sand = 8.4 cm³

(g) density of sand = 24.4 g/8.4 cm³ = 2.9 g/cm³

Therefore, the density of sand is obtained by taking the ratio of the mass of the sand and the volume if the sand.

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The correct answer is Einstein proposed that light must be made up of packets to explain the photoelectric effect (particles). The frequency of a light packet affects how much energy it contains. Whether or not a single photon has enough energy to knock an electron loose determines whether or not a metal will emit electrons.

The kinetic energy of the electrons is precisely proportional to intensity because, according to wave theory, the energy of electromagnetic waves is uniformly distributed over the wavefront and solely depends on the intensity of the input light beam. However, it was discovered through experimentation that the kinetic energy is unrelated to the brightness of the incident light.

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Answer:

First of all mars will orbit a little faster many asteroids can hit mars due to its twice mass mars will get hotter then it is now

All three methods Amp draw test, Voltage test, Ohm test should be used in combination to diagnose circuit problems and determine which component is not working properly.

All three methods can be used to determine which component in a circuit is not working properly, but they are each useful for different purposes:

A) Amp draw test: This method involves measuring the amount of current flowing through a component. It can be used to determine if a component is drawing too much or too little current, which can indicate a problem such as a short circuit or an open circuit.

B) Voltage test: This method involves measuring the voltage across a component. It can be used to determine if a component is receiving the correct voltage, which can indicate a problem such as a loose connection or a failed component.

C) Ohm test: This method involves measuring the resistance of a component. It can be used to determine if a component has the correct resistance, which can indicate a problem such as a broken wire or a failed component.

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If you stare at a red object and immediately look at a white area afterward, you will see an afterimage that is the same size and shape, but it is blue-green, or cyan, in color. '

This is known as the opponent process theory

The opponent process theory of color vision says that color is processed in pairs (red-green, yellow-blue, and black-white.)

It means that Light that stimulates one half of the pair inhibits the other half.

In conclusion, this opponent process is thought to be responsible for our perception of color and explains why people experience afterimages.

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Answer:

option d is answer because pd is measured in volt.

The distance between the objects is reduced to d/2, then the force between them becomes F/4. Here option C is the correct answer.

The electric force between two charged objects is given by Coulomb's Law, which states that the force is proportional to the product of the charges and inversely proportional to the square of the distance between them. Mathematically, we can express this as:

F = \(k \times \frac{(q1 \times q2)}{d^2 }\)

where F is the electric force, q1 and q2 are the charges on the two objects, d is the distance between them, and k is Coulomb's constant.

If the charges on both objects are reduced to one-fourth of their original value, then the force between them becomes:

F' = \(k \times \frac{((\frac{1}{4} )q1 \times (\frac{1}{4} )q2) }{d^2}\)

Simplifying this expression gives:

F' = F/16

Next, if the distance between the objects is reduced to d/2, then the force between them becomes:

F'' = \(k \times \frac{(q\frac{1}{4} \times q\frac{2}{4})}{ (\frac{d}{2})^2 }\)

Simplifying this expression gives:

F'' = F/4

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Answer:

Gravity

Explanation:

Newton contributions

According to the given statement , the acceleration of the sphere at the instant when its speed is 27.0 m/s.

We can use the principles of electrostatics and kinematics.  a = [(9.00 x 10⁹ N * m² / C²) * |5.00 μC * 2.00 μC| / (0.08 m)²] / (4.00 x 10⁻³ kg).

1. Determine the electric force between the two charges:
  - The electric force between two charges can be calculated using Coulomb's Law:

F = k * |q1 * q2| / r².
  - In this case, q1 = 5.00 μC and q2 = +2.00 μC. The distance between them, r, is the horizontal distance of 8.00 cm (which is 0.08 m).
  - The constant k is 9.00 x 10⁹ N * m^2 / C².
  - Plugging in the values, we get F = (9.00 x 10^9 N * m² / C²) * |5.00 μC * 2.00 μC| / (0.08 m)².

2. Calculate the net force acting on the sphere:
  - At any instant, the net force acting on the sphere is the sum of the electric force and the force due to gravity.
  - However, in this case, gravity can be neglected, as stated in the question.
  - Therefore, the net force acting on the sphere is equal to the electric force between the two charges.

3. Calculate the mass of the sphere:
  - The mass of the sphere is given as 4.00 x 10⁻³ kg.

4. Apply Newton's second law:
  - Newton's second law states that the net force acting on an object is equal to the product of its mass and acceleration: Fnet = m * a.
  - In this case, the net force acting on the sphere is the electric force between the charges.
  - Plugging in the values, we get (9.00 x 10⁹ N * m^2 / C²) * |5.00 μC * 2.00 μC| / (0.08 m)² = (4.00 x 10⁻³ kg) * a.

5. Solve for the acceleration:
  - Rearranging the equation, we have a = [(9.00 x 10⁹ N * m² / C²) * |5.00 μC * 2.00 μC| / (0.08 m)²] / (4.00 x 10⁻³ kg).
  - Evaluating the expression, we find the value of acceleration.

By following these steps, you can find the acceleration of the sphere at the instant when its speed is 27.0 m/s.

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A 0.1 M solution of weak acid HA has a concentration of 0.1 M, independent of its strength as an acid. The strength of the acid is not specified by the given information.

In a 0.1 M solution of a weak acid, the concentration of the weak acid, denoted as [HA], is 0.1 M.

The term "m" in this context refers to molarity, which represents the number of moles of solute (in this case, the weak acid HA) per liter of solution. Therefore, a 0.1 M solution means there are 0.1 moles of HA dissolved in every liter of the solution.

It's important to note that the concentration of HA in the solution is independent of its strength as an acid. The strength of an acid is determined by its ability to donate protons (H+) to a solution.

In summary, the true response with regard to a 0.1 M solution of a weak acid HA is that the concentration of HA in the solution is 0.1 M. The strength of the acid is not specified by the given information.

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The weight of a \(45 kg\) box is \(441.45 N\).

Weight refers to the measure of the force exerted on an object due to the gravitational pull of the Earth.

Given the mass of the box is \(m=45 kg\).

The weight of an object (\(W\)) can be found by multiplying the mass of the object (\(m\)) by the acceleration due to gravity (\(g\)).

So, \(W=mg\).

It is known that acceleration due to gravity, \(g=9.81 m/s^2\).

Hence, the weight of the box, \(W=(45kg)\times (9.81 m/s^2)\).

\(\Rightarrow W=441.45 (kg\cdot m/s^2)\\\Rightarrow W=441.45 N\)

Therefore, the weight of the box is \(441.45 N\).

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Here: Amount of hydrogen = 1.50 g Amount of oxygen = 12.0 g so, 40/18XProtons = Atomic number = 18Neutrons = Mass number - Protons = 40 - 18 = 22 Electrons = Protons = 18.  The element with 18 protons is Argon, so 40/18X represents the isotope of Argon which contains 22 neutrons.

The element with 18 protons is Argon, so 40/18X represents the isotope of Argon which contains 22 neutrons. To find: Amount of water vapor formed Balanced chemical equation for the reaction:2H2(g) + O2(g) → 2H2O(g)From the balanced chemical equation.

From the balanced chemical equation, 2 moles of hydrogen react with 1 mole of oxygen to give 2 moles of water vapor. So, 0.75 mol of hydrogen will react with 0.375/2 = 0.1875 mol of oxygen to form water vapor.

Molar mass of water = 18 g/mol So, amount of water formed = 2 x 0.75 mol x 18 g/mol = 27 g Thus, 27 g of water vapor is formed. Determine the protons and electrons in each of the following ions:

The given ions are:Ni2+Ga3+Cr3+Al3+Br-Number of protons and electrons in the ions are:Ni2+Ga3+Cr3+Al3+Br-

Determine the number of protons, neutrons and electrons in the following:40/18XProtons = Atomic number = 18

Neutrons = Mass number - Protons = 40 - 18 = 22 Electrons = Protons = 18

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Answer:

Via, vibration.

Source generate vibration, and air molecules vibrate, so kinetics and potential energy transfer

Answer:

You’re really dumb...

Explanation:

A discordant igneous intrusion cuts across bedding planes. Here is the detailed explanation of the given question:Explanation:The Discordant igneous intrusion is the formation of an igneous rock mass when magma is injected into a host rock and cools there.

This form of igneous intrusion does not conform to the stratification or layering of the existing rock mass because it cuts across it.Therefore, a discordant igneous intrusion cuts across bedding planes.Option (a) is correct. It is the only option that describes the features of discordant igneous intrusion. Hence, the correct answer is option (a).

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Answer:

Since the five forces applied are all in the same direction with the motion of the sled, to solve for the net force, add the five forces together. Therefore, the net force is 30 Newtons.

Explanation:

The mass of the block on the frictionless horizontal surface is 5 kg.

The mass of the block is determined by applying Newton's second law of motion:

F = ma

The given parameters are

the magnitude of the first force, F₁ = 12 N

the magnitude of the second force, F₂ = 2 N

acceleration of the block, a = 2 m/s²

So, determining the mass of the block is

F = ma

∑F = ma

F₁ - F₂ = ma

12 - 2 = 2m

10 = 2m

m = 5 kg

Thus, the mass of the block on the frictionless horizontal surface is 5 kg.

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Answer:

b that is density at object moves

Answer:

Explanation:

it's B)  or the question right above the one you've marked.   The planets do form a plane almost exactly :0   but not a sphere.  

Answer:

the time required is 0.886 seconds

Explanation:

The computation is shown below:

As we know that the content of the chemical energy that has a calorific value of hydrogen is 141790 kJ /kg

And, the total energy stores is 100,000 kg

Now

E = 141790 ×  100,000 kJ

= 14.179 TJ

The time would be

T = E ÷ P

= 14.179 ÷ 16

= 0.886 sec

hence the time required is 0.886 seconds

Answer:

too much :(

Explanation:

\overline{a} = \frac{v - v_0}{t} = \frac{\Delta v}{\Delta t}

\overline{a} = average acceleration

v = final velocity

v_0 = starting velocity

t = elapsed time

Answer:

a = Δv⁄t.

Explanation:

The amount of charge that flows from one capacitor to the other when the capacitors are connected together is 61.75μC and the total energy stored when two capacitors are connected is 742.35J.

The capacitor is the charge storage device and it stores electrical energy. The capacitance equals the ratio of charge and voltage.

From the given,

C₁ = 7.1μF; C₂ = 18.7 μF

V₁ = 19.6V; V₂ = 7.6V

The charge in the capacitor C₁, Q₁ = C₁×V₁ = 7.1μF×19.6V = 139.16μC

The charge in the capacitor C₂, Q₂ = C₂×V₂ = 18.7×7.6 = 142.12μC

When two capacitors are connected in parallel with the same polarities, the total charge of the capacitor is,

Q = Q₁ + Q₂ = 139.16 + 142.12 = 281.28 μC

q₁/q₂ = C₁/C₂

q₁ =(C₁/C₂)×q₂

Total charge (Q) = q₁ + q₂ = (C₁/C₂)×q₂+q₂

  281.28 = (7.1/18.7 +1 ) q₂

q₂ = 203.47 μC.

Q = q₁ + q₂

q₁ = Q - q₂

   =  281.28μC - 203.47μC

q₁  = 77.41μC

The potential difference between the plates, V = q₁/C₁ = q₂/C₂

V = 77.41/7.1 = 10.9V

Thus, the total charge(ΔQ) = Q₁-q₁=139.16μC-77.41μC

      ΔQ = 61.45μC, the charge flows from one capacitor to another.

The reduced total energy = 1/2(C₁V₁²)+1/2(C₂V₂²)-1/2(C₁+C₂)V²

ΔE = 1/2{(7.1×19.6×19.6)+(18.7×7.6×7.6)-(7.1+18.7)×10.9×10.9}

    = 742.35J

Thus, the reduction in total energy stored is 742.35J.

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Explanation:

Please give a brainliest answer

Newton's third rule of motion states that whenever air is forced backwards out of a balloon (out the end with the opening), there must be an equal and opposite reaction force pushing the balloon forward (out the end opposite the opening).

A balloon tends to fly around the room randomly when you just let it go on its own, making steering nearly impossible. On the other hand, you can use the balloon's energy to move the automobile forward if you attach it to a vehicle.

What is the ballon powered car model experiment?

Steps to Take

1. Poke a hole through the centre of the pop bottle lid with the hammer and nail.

2. Attach the ballon to the straw using masking tape. By blowing into the straw, check the balloon for any holes.

3. Connect the tongue depressor to the two short straw pieces. These will serve as the wheels' axles.

4. Using the skewers, fasten the four wheels. This could be a little difficult! To prevent the bottle cap from rubbing on the side of the tongue depressor, you might need to adjust it.

5. Use masking tape to secure the balloon and straw to the car's top.In order to have enough space to blow into the straw, make sure it is over the edge.

6. Blow into the balloon, grip the straw, then release. Observe how the automobile moves off! ​

Students build a car in this exercise that is propelled by the elastic energy of a balloon. In contrast to family automobile, which transforms chemical energy into kinetic energy, this vehicle transforms potential energy into kinetic energy.

When inflated with air, balloons, which are elastic, can store potential energy. The potential energy, sometimes referred to as kinetic energy, is transformed into the energy of motion when the air is released. When the car is moving forward, you can perceive this energy.

When you release the automobile, it will have more kinetic energy the more potential energy it has saved.

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The direct path and direction from point A to B is called "Displacement". (Option D).

Displacement is described as a change in an object's location. It is a vector quantity with a magnitude and a direction. It is depicted as an arrow pointing from the starting point to the ending point.

For instance, if an object travels from A to B, the object's location changes. Displacement is the change in the location of an item.

The mathematical expression of displacement is given as:

Δx = xf  - x₀; Where

xf = Final Position

x₀ =  Initial position; and

Δx = displacement.

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Answer:

d or b i think

Explanation:

i looked it up on go ogle :)

Answer:

b

Explanation:

sounds like it should be right

According to the given question distance between these two points is 1.971m.

The distance can be a literal length as defined by physics or a general estimation based on other variables.  It is a generalization of the idea of physical distance. Distance is a non-numerical unit of measurement in psychology and the social sciences; psychological distance is the separation of an object from itself along dimensions including time, space, and isolation.

According to the question:

speed=frequency*wavelength

wavelength = 340/140 =2.428 m

phase difference=2pi× x/lamda

x=5.1*2.428/(2*pi)

x=1.97m

since v= f × wavelength

where v = speed of sound  and f = frequency

therefore wavelength  = v/f  = (340)/140 = (17/7)m

now, since Phase angle = (2×pi/wavelength)×shift

or, shift = phase angle × (wavelength/2×pi) = 5.1 × ((17/7)/2×pi) = 1.971m

Hence, the distance between these two points = 1.971m

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Answer:

they would repel because they have the same charge. Charges that are different will stick together.