The speed of light in a material is 1.74 x 108 m's. What is the index of refraction of this material?

The horizontal and vertical component of the velocity of the plane is 50(√3) mph and 50mph.

Velocity is defined as the ratio of displacement and time and the unit of velocity is m/s. The velocity is the vector quantity. The horizontal and vertical component is given as:

Horizontal component (x) = V cosθ

Vertical component(y) = V sinθ

From the given:

velocity fo the plane = 100mph

angle (θ) = 30°

The horizontal component (x) = V cosθ = 100×cos(30°) = 100 × √3/2

                                             = 50 √3

The vertical component (y) = V sin(θ) = 100×sin(30°) = 100×1/2

                                                  = 50

Thus, the horizontal and vertical components of the plane are (50√3,50) mph.

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Let's check

\(\\ \rm\dashrightarrow F=\dfrac{k}{q_1q_2}{r^2}\)

\(\\ \rm\dashrightarrow F\propto Q\)

\(\\ \rm\dashrightarrow F\propto \dfrac{1}{r^2}\)

So

Option A and C can be used

Answer:

Decreasing the distance between the particles by a factor of 2

Explanation:

To double the force between the two charge particles, the distance between the particles should be reduced by a factor of two.

According to coulombs law "force is directly proportional to the potential between the two charges and inversely proportional to the square of their distances".

       \(\sf{F  = \dfrac{kq_{1} q_{2} }{r^{2} }}\)

F is the electric force

k is the coulomb constant

q is the charge

r is the distance or separation

As the separation between the charges is reduced the force increases and vice versa.

Answer:

the unbalanced force

Explanation:

An unbalance forces are defined as the forces which causes a change in the speed or velocity of a moving object. A force causes a change in the motion of a body and an unbalanced force causes the body to change its velocity and speed or a change in its direction.

An unbalanced force will start movement in a static object or it can cause to speed up the moving object or it can cause to stop the moving object.

Thus an unbalanced force causes the cart to speed up.

Lighting is basically the discharge of electricity that does not care where it strikes. It basically seeks the shortest or the most direct path to the ground.

Therefore, the given statement is a true statement.

Answer:

TRUE

Explanation:

Rock: Weight in air (N): 1.2, Apparent weight (N): 1.0, Buoyant Force (N): 0.2, Mass of beaker and water (kg): 0.069, Mass of beaker (kg): 0.048, Mass of displaced water (kg): 0.021 and Weight of displaced water (N): 0.21.

Buoyant force is the upward force exerted on an object when it is submerged in a fluid. This force is caused by the pressure differences between the top and bottom of the object, due to the fact that the pressure at the bottom of the object is greater than the pressure at the top. This pressure difference is caused by the fluid’s weight, which is pushing down on the object from above.

Styrofoam:

Weight in air (N): 0.85

Apparent weight (N): 0.13

Buoyant Force (N): 0.72

Mass of beaker and water (kg): 0.123

Mass of beaker (kg): 0.048

Mass of displaced water (kg): 0.075

Weight of displaced water (N): 0.75

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(a) The amplitude of the wave is 0.2 m.

(b) The period of the wave is  4 s.

(c) The wavelength of the wave is 100 m.

(a) The amplitude of the wave is the maximum displacement of the wave.

amplitude of the wave = 0.2 m

(b) The period of the wave is the time taken for the wave to make one complete cycle.

period of the wave = 5.5 s - 1.5 s = 4 s

(c) The wavelength of the wave is calculated as follows;

λ = v / f

where;

f = 1/t = 1 / 4s = 0.25 Hz

λ = ( 25 m/s ) / 0.25 Hz

λ = 100 m

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Answer:

(42/100) (25)=area

10.5 m^2 = area

Answer:

C. Thermal energy moves within the air above the flames as warmer

air rises

Explanation:

Answer:

Yes it is matter

Explanation:

In physics, usually the word "electricity" isn't really used. "Electric current" is more common, and is defined as the flow of charges, where the charges are held by particles (electrons). Electrons have mass, so they are definitely matter.

The weight of the combined system is 203 kg.

What is mean by density?

The density is the ratio of mass to volume. It is typically expressed as kilograms per cubic meter (kg/m3) and is used to quantify the physical properties of different materials.

Density is an important property as it affects the material’s ability to resist changes in pressure, temperature, and other physical forces.

It is also used to determine the composition of certain substances, such as the amount of salt in a solution.

Density is an intrinsic property of a material and is not affected by the size or shape of the sample being measured.

Density can be determined by measuring the mass of an object and dividing it by its volume. The density of a substance can be compared to that of other substances to determine relative densities.

Density is used in many areas of science such as physics, chemistry, engineering, and geology.

Density is also important to the study of materials, as it can be used to identify and characterize them. Density is an important parameter when considering the structural and mechanical properties of materials.

Step 1: Calculate the mass of water in the tank.

Mass of water = Volume of water x Density of water

Mass of water = 0.2m^3 x 1000 kg/m^3

Mass of water = 200 kg

Step 2: Calculate the weight of the combined system.

Weight of the combined system = Mass of tank + Mass of water

Weight of the combined system = 3 kg + 200 kg

Weight of the combined system = 203 kg

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C. Does it include atoms? is the least helpful inquiry to ask when determining whether or not something is matter because some types of matter, such as photons and neutrinos, do not include atoms but nonetheless display characteristics of matter, such as mass and taking up space.

In order to determine whether or not something is matter, all of the above inquiries are helpful. If we had to pick the least helpful query, though, it would be C. Is it composed of atoms?

This is because of the existence of entities like photons, which are light-related particles, which are thought of as matter but are not composed of atoms. It is crucial to remember that atoms are the fundamental units of matter and that they actually make up the majority of it.

Therefore, even if it might not always be the best question to ask, it is still an important one to take into account when deciding whether or not something is important.

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Answer:

i need help with the same question

Explanation:

Answer:

did you get the answer???

Answer: 38 m/s north

Explanation:

Explanation:

Equation for Impact

FΔt = ΔP,

F = force

Δt  = Impact of time

ΔP = Change in momentum

Car steering is engineered to fail in order to maximize the time of contact and hence reduce the initial impact and mitigate the damage incurred.

Road guard railing crumple on contact to maximize impact time and hence reduce impact intensity and mitigate damage.

Road safety containers are loaded with liquid or sand as they improve the period of impact.

No, the potential of a non-uniformly charged sphere cannot be the same as that of a point charge.

The potential of a charged sphere depends on the distribution of charge throughout the sphere, whereas the potential of a point charge depends only on its own charge and the distance from it. A non-uniformly charged sphere has different charges distributed at different distances from a point in space, so the potential at that point will vary depending on the distribution.

In contrast, a point charge has all its charge concentrated at a single point, so the potential at any given distance will be the same regardless of the distribution of charge in the surrounding space. Therefore, the potential of a non-uniformly charged sphere cannot be the same as that of a point charge.

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Answer:

h = 1.01 x 10⁻³⁴ J.s

Explanation:

The energy applied by the voltage must be equal to the energy associated with the wavelength of light:

\(eV = \frac{hc}{\lambda}\\\)

where,

e = charge on electron = 1.6 x 10⁻¹⁹ C

V = stopping potential

h = Planck's Constant = ?

c = speed of light = 3 x 10⁸ m/s

λ = wavelength of light

For λ = 400 nm = 4 x 10⁻⁷ m, V = 0.7 V:

\((1.6\ x\ 10^{-19}\ C)(0.7\ V) = \frac{h(3\ x\ 10^8\ m/s)}{4\ x\ 10^{-7}\ m}\\\)

h = 1.49 x 10⁻³⁴ J.s

For λ = 500 nm = 5 x 10⁻⁷ m, V = 0.2 V:

\((1.6\ x\ 10^{-19}\ C)(0.2\ V) = \frac{h(3\ x\ 10^8\ m/s)}{5\ x\ 10^{-7}\ m}\\\)

h = 0.53 x 10⁻³⁴ J.s

Taking average of both values:

\(h = \frac{(0.53+1.49)\ x\ 10^{-19}\ J.s}{2}\)

h = 1.01 x 10⁻³⁴ J.s

The surface temperature of the stars whose infrared radiation have a wavelength of  2 µm is 1.45×10³ K.

Temperature is the measure of hotness or coldness of a thing or place.

To calculate the temperature of the stars, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the surface temperature of the stars is 1.45×10³ K.

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Answer:

Impulse = \(206.28 * 10 = 2062.8\) g.m/s

Explanation:

Impulse is equal to the product of force and time

Here

Density of car =  \(0.54\)  g/mL

Volume of car \(= 38.2\) mL

Mass of the car is equal to the product of density and volume of car

Mass of the car \(= 0.54 * 38.2\) \(= 20.628\) grams

Acceleration of the car is \(10\) m/s^2

Force is equal to product of mass and acceleration

F = \(20.628 * 10 = 206.28\) g .m/s^2

Impulse = F * t

Impulse = \(206.28 * 10 = 2062.8\) g.m/s

Answer:

Hmmmm

Explanation:

Answer:

B

Explanation:

Answer:

B

Explanation:

Answer:

B

Explanation:

Which air pocket would you expect to cool down more at night? 

Answer: The ocean air.

Why?

Because ocean water seems to cool faster at night which may cause the ocean air to cool down more at night.

Ocean water seems to cool faster at night which may cause the ocean air to cool down more at night.

"Air pocket" is merely another term for ordinary turbulence. You might feel as if you're falling from the sky, but rest assured, if you flying commercially, you rarely gain or lose more than about twenty feet, especially if the plane is on autopilot.

The term "air pocket" comes from early aviation, a time when pilots flying open-cockpit biplanes took adventurous locals on a rides in their “flying machines.”

When the plane entered air that, instead of simply sitting there, was flowing slightly upward or slightly downward, the plane's path was altered slightly upward or slightly downward.  

Therefore, Ocean water seems to cool faster at night which may cause the ocean air to cool down more at night.

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Answer:

D

Explanation:

Breach of warranty generally alludes to the disappointment of a dealer or supplier to satisfy the conditions of a guarantee, or portrayal, made during the contracting system. Such terms can cover an expansive range of issues going, for instance, from justifying that medical care rehearses have agreed with wellbeing and security and other guideline; to justifying that a property doesn't contain asbestos; to going into an agreement that says the gathering organization being gained isn't the subject of any prosecution.

The law expects that contracting gatherings can and should remain behind these (guarantees and portrayals). It accordingly follows that there is legitimate plan of action under agreement as well as misdeed for break of guarantees and deception.

Answer:

Explanation:

The corona is in the outer layer of the Sun's atmosphere—far from its surface. Yet the corona is hundreds of times hotter than the Sun's surface. ... In the corona, the heat bombs explode and release their energy as heat. But astronomers think that this is only one of many ways in which the corona is heated.

The chromosphere ("sphere of color") is the second of the three main layers in the Sun's atmosphere and is roughly 3,000 to 5,000 kilometers deep. Its rosy red color is only apparent during eclipses. The chromosphere sits just above the photosphere and below the solar transition region.

The photosphere is the visible "surface" of the Sun. The Sun is a giant ball of plasma (electrified gas), so it doesn't have a distinct, solid surface like Earth. ... The photosphere is much cooler than the Sun's core, which has a temperature well above 10 million degree

And thats all i know

The following would expect to be a strong electrolyte in solution (b) KCI is correct option.

When dissolved in water, a strong electrolyte produces a large concentration of ions in solution by totally dissociating into ions.  The following compounds are typically strong electrolytes in solution according to this definition:

These substances readily dissociate into ions in water and exhibit high electrical conductivity, making them strong electrolytes in solution.

Therefore, the correct option is (b).

The complete question is,

Which of the following would be a strong electrolyte in solution?

a) Al(OH)₃ b) KCI c) Pbl₂

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Answer:

Explanation:

Multiple choices. 1)when two groups are playing tug of war the forces of the two groups are:- A)same direction B)opposite direction C)different direction but not possible D)A and B

Answer:

D-Energy

Explanation:

Answer:  b. inertia

According to Newton's First Law of Motion, if an object is at rest, then it stays at rest as long as no external forces are applied to get the object moving. If an object is in motion, then it stays in motion (again as long as no external forces are applied to say otherwise). This is known as inertia.

For example, if you were to launch a baseball into deep space (far from any planet), then the ball will travel in a straight line at a constant speed until it either hits another object to have it slow down, or another planet's gravity starts to pull on the ball.

The Normal force = 302.63 N

Friction Force = 115 N

u*Normal force= friction,

u= 0.38,

N= 115/0.38

Therefore, the Normal force = 302.63 N

Mass is a fundamental feature of matter that quantifies the amount meaningful in an object. It is typically calculated in units of kilograms (kg) or grams (g). Mass is various from weight, that depends on the gravitational force pursuing an object, while mass debris constant although gravity.

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The amount of work done by the gas is proportional to the pressure and the change in volume, as well as the efficiency of the process. If the pressure and volume are known, the work done by the gas can be calculated by multiplying these values by the efficiency of the process.

The amount of work done by a gas when it expands is proportional to the change in volume, pressure, and temperature. According to the first law of thermodynamics, the energy of a closed system is conserved, so the work done by the expanding gas is equal to the energy transferred from the gas to the environment in the form of work. Therefore, the work done by the gas is equal to the change in energy of the system. Assume that the process is 10% efficient. Then, only 10% of the energy available to the system is converted into work. This means that the remaining 90% of the energy is lost to the environment in the form of heat. As a result, the amount of work done by the gas expanding into the atmosphere is given by the formula

W = E x η, where W is the work done by the gas, E is the energy available to the system, and η is the efficiency of the process. The energy available to the system is determined by the difference between the internal energy of the gas before and after the expansion. The internal energy of a gas is determined by its temperature, pressure, and volume.

Assuming that the temperature and pressure are constant, the change in internal energy is proportional to the change in volume. Therefore, the energy available to the system is equal to the product of the pressure and the change in volume: E = P x ΔV, where P is the pressure of the gas and ΔV is the change in volume during the expansion. Substituting this equation into the formula for work, we get W = P x ΔV x η.

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Answer: