A plane electromagnetic wave, with wavelength 4.3 m, travels in vacuum in the positive direction of an x-axis. The electric field, of amplitude 340 V/m, oscillates parallel to the y-axis.

What are the (a) frequency, (b) angular frequency, and (c) angular wave number of the wave?

(d) What is the amplitude of the magnetic field component?

(e) Parallel to which axis does the magnetic field oscillate?

(f) What is the time-averaged rate of energy flow associated with this wave? The wave uniformly illuminates a surface of area 2.7 m
2
.

If the surface totally absorbs the wave, what are (g) the rate at which momentum is transferred to the surface and (h) the radiation pressure?

The installation of glass refers to the process of fitting transparent material into a glazed opening. This involves placing the glass securely within a frame or structure, ensuring a proper fit and seal.

Glass installation may include various types of windows, doors, skylights, or other architectural features that require transparent panels. It requires precision and expertise to ensure the glass is correctly positioned, aligned, and adequately sealed to provide insulation, weatherproofing, and security. Glass installation is essential for allowing natural light to enter a space while maintaining visibility and protecting against external elements. Glass installation involves fitting transparent material into a glazed opening, such as windows or doors. It requires precise positioning and sealing to ensure proper insulation, weatherproofing, and security. This process allows natural light to enter while maintaining visibility and protecting against external elements.

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The scientist that described an atom made a solid positively charged substance with electrons dispersed throughout it was: Ernest Rutherford.

In 1911 Ernest Rutherford proposed his atomic model in which he considered the atom as a positively, densely charged center called a nucleus in which the electrons circulate around the core with a negative charge.

He was responsible for many discoveries in the radioactivity's  fields and nuclear physics.

The atom is the smallest part of the composition of matter, it is indivisible and is composed of a nucleus that has protons and neutrons, and around the nucleus there are the electrons.

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D)there is repulsive electrostatic force applied only on sphere B

Answer:

A combinational logic circuit is a circuit whose outputs only depend on the current state of its inputs. In mathematical terms, the each output is a function of the inputs. These functions can be described using logic expressions, but is most often (at least initially) using truth tables.

The antenna should be approximately 91.46 meters tall for a station broadcasting at a frequency of 820 kHz

To determine the height of an antenna that is λ/4 tall for a station broadcasting at a frequency of 820 kHz, you will first need to find the wavelength of the radio waves.

Step 1: Convert the frequency to Hz.
Frequency = 820 kHz = 820,000 Hz

Step 2: Use the formula for the speed of light (c) to find the wavelength (λ).
c = λ * frequency, where c is the speed of light (approximately 3 x 10^8 m/s).

Step 3: Rearrange the formula to solve for λ.
λ = c / frequency

Step 4: Calculate the wavelength.
λ = (3 x 10^8 m/s) / (820,000 Hz) ≈ 365.85 meters

Step 5: Find the antenna height.
Antenna height = λ/4 = 365.85 meters / 4 ≈ 91.46 meters

The antenna should be approximately 91.46 meters tall for a station broadcasting at a frequency of 820 kHz.

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Answer:

B

Good luck! Have a great day!

Answer:

potential energy = mgh , where m is mass of body , g is acceleration due to gravity and h is given height

since both of the body are at same height above the ground , so the body having greater mass will have more potential energy

that is 20 kg body will have higher P.E

Explanation:

By Using Euler's method with two steps, we can find the approximate value of Y(2) is 2.125. , where Y is the solution of the initial value problem dy/dx = x - y, and Y(1) = 3.

Euler's method is defined as a numerical technique which is  used to approximate solutions into ordinary differential equations. The method includes dividing the interval of interest into smaller steps and thereafter approximating the solution at each step by using the derivative of the function.

In this case, we are given the initial value problem dy/dx = x - y, with the initial condition Y(1) = 3. To approximate Y(2) using Euler's method with two steps, we will divide the interval [1, 2] into two equal steps.

Step 1:

We start with the initial condition Y(1) = 3. Using the differential equation dy/dx = x - y, we can approximate the value of Y at the midpoint of the interval [1, 2].

Using the step size h = (2 - 1) / 2 = 0.5, we can calculate Y(1.5) as follows:

Y(1.5) ≈ Y(1) + h × (x - y) = 3 + 0.5 × (1.5 - 3) = 3 + 0.5 × (-1.5) = 2.25

Step 2:

Now, using the value of Y(1.5) as the new approximation, we calculate Y(2) using the same process:

Y(2) ≈ Y(1.5) + h × (x - y) = 2.25 + 0.5 × (2 - 2.25) = 2.25 + 0.5 × (-0.25) = 2.125

Thus,  by using Euler's method with two steps, the approximate value of Y(2) is 2.125.

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The complete question is

Use Euler's Method With Two Steps To Approximate Y(2), Where Y Is The Solution Of The Initial Value Problem: Dy : X − Y, Y(1) = 3

Answer:

c. Synaptic transmission

Explanation:

To transmit impulses/electronic signals around the body, nerve cells transfer messages across the synapse and the movement of the chemicals from one cell to the other is known as either diffusion or synaptic transmission.

Explanation:

PE = KE

mgh = ½ mv²

v = √(2gh)

v = √(2 × 9.8 m/s² × 0.75 m)

v = 3.83 m/s

The ship's speed relative to the ground is 25 km/hr to the South.

The displacement is zero, which means that the final position is the same as the initial position. The movements to the North and South cancel out, and the movements to the East and West cancel out.

Velocity is a vector quantity that describes the rate at which an object's position changes over time.In other words, velocity is an object's speed in a specific direction. The velocity of an object is typically represented by a vector, which has both magnitude (the speed of the object) and direction.

The ship's speed relative to the water is 22 km/hr to the South. If there is a current of 3 km/hr to the South, the ship's speed relative to the ground is the vector sum of its speed relative to the water and the velocity of the current. Since the two velocities are in the same direction, we can simply add them to get:

velocity relative to the ground = 22 km/hr to the South + 3 km/hr to the South = 25 km/hr to the South.

Therefore, the ship's speed relative to the ground is 25 km/hr to the South.

Similar to the previous problem, the ship's speed relative to the ground is the vector sum of its speed relative to the water and the velocity of the current. However, this time the current is going in the opposite direction, so we need to subtract the velocity of the current from the ship's speed relative to the water:

velocity relative to the ground = 22 km/hr to the South - 3 km/hr to the North = 22 km/hr to the South + 3 km/hr to the South = 25 km/hr to the South.

Therefore, the ship's speed relative to the ground is 25 km/hr to the South.

The displacement is characterized by the difference between the final and initial positions. In this case, the initial position and the final position are the same, so the displacement is zero. We can represent the two movements using vectors:

50 m to the right = +50 m i

20 m to the left = -20 m i

The displacement vector is the vector sum of these two vectors:

displacement = +50 m i - 20 m i = +30 m i

Since the x-component of the displacement vector is positive, the displacement is to the right.

We can represent the four movements using vectors:

2 km North = +2 km j

4 km East = +4 km i

2 km South = -2 km j

4 km West = -4 km i

The displacement vector is the vector sum of these four vectors:

displacement = +2 km j + 4 km i - 2 km j - 4 km i = 0 km i + 0 km j

Therefore, the displacement is zero, which means that the final position is the same as the initial position. The movements to the North and South cancel out, and the movements to the East and West cancel out.

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Answer:

D

Explanation:

this is because the formula for frequency is

f = 1/T

and it is a reciprocal

By exerting a force of 390 N with your tooth on an area of 1.14 mm^2, you can create a pressure of 3.42x10^8 Pa. This high pressure allows you to chew through very tough objects with your incisors.

To calculate the pressure exerted by your incisor on the tough object, we can use the formula: pressure = force/area.

Given that the force exerted by your tooth is 390 N, and the area of the pointed tooth is 1.14 mm^2, we can plug these values into the formula to get:

pressure = 390 N / 1.14 mm^2

However, we need to convert the area from mm^2 to m^2 to get the answer in Pascal (Pa), which is the SI unit of pressure.

1 mm^2 = 1x10^-6 m^2

So, the pressure exerted by your tooth on the tough object is:

pressure = 390 N / (1.14x10^-6 m^2)

pressure = 3.42x10^8 Pa

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The object D is made up of material Lead. The correct option is D.

The specific heat is the amount of heat required to change the temperature by 1°C. It is denoted by C.

Two 1-kg objects, C and D, increase in temperature by the same amount, but the thermal energy transfer of object C is greater than the thermal energy transfer of object D. The object C has a specific heat of 235 J/kg-K.

Q = m C ΔT

Qc > Qd

The energy transfer is proportional to specific heat.

Specific heat of D must be less. The possible material with specific heat less than the given value is for Lead material.

Thus, the correct option is D.

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The integral of 1/(1 + x²) is (1/2)ln|1 + x²| + C where C is the constant of integration.

Integration is a mathematical process of finding the antiderivative of a function. To integrate the given expression 1/(1 + x²), we will use the substitution method.

Let u = 1 + x², du/dx = 2x dx, then dx = du/2x and the integral becomes:

∫1/(1 + x²) dx = ∫1/u * (1/2x) du= (1/2)∫1/u du

The antiderivative of 1/u is ln|u| + C, where C is the constant of integration.

Therefore, the final solution of the integral is (1/2)ln|1 + x²| + C.

Let us work through the steps:

Step 1:Let u = 1 + x² and then differentiate both sides with respect to x to obtain du/dx. du/dx = 2x

Substitute 2x dx = du into the integral ∫1/(1 + x²) dx to get the integral in terms of u:∫1/u * (1/2x) du = (1/2) ∫1/u du

Step 2:Calculate the antiderivative of 1/u, which is ln|u|. Thus, the final solution is (1/2)ln|1 + x²| + C, where C is the constant of integration. The constant C will vary depending on the initial conditions of the problem.

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Answer:

Robert Hooke used an early microscope to observe a cork sample. How did this help contribute to cell theory? It helped to show that cells contain water. ... It helped to show that some cells are visible to the naked eye.

Explanation:

If your teacher checks if it was copied just put it in your on words

In the photo excitation of the cis to trans conversion in retinal, the energy from the photon ultimately used for the photon is absorbed and the system gives off an electron via the phototoelectric effect.

The photoelectric effect light of a certain frequency, known as the threshold frequency, is shone onto a metal surface, electrons are ejected from the metal and can be detected as a current. This effect was first observed by Heinrich Hertz in 1887 and explained by Albert Einstein in 1905 as a consequence of the particle nature of light.

Einstein proposed that light is composed of discrete packets of energy called photons. When a photon with enough energy strikes a metal surface, it can transfer its energy to an electron, which can then escape from the metal. The energy of the electron depends on the frequency of the light, not its intensity, which was a departure from classical wave theory.

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Complete Question:-

In the photo excitation of the cis to trans conversion in retinal, what is the energy from the photon ultimately used for?

a. This process ends in stored energy via a translocation of a hydroxide ion across the cell membrane.

b. The process stores this energy in the form of charge separation between the Schiff base and amino acid of opsin.

c. Pumping Na+; ions to amplify the photo signal into an electrical signal

d.The photon is absorbed and the system gives off an electron via the photoelectric effect.

Pilots can prevent landing at the wrong airport or on the wrong runway by adhering to established procedures and employing various navigational aids.

Pilots can employ several measures to prevent landing at the wrong airport or on the wrong runway. Firstly, they should carefully review and follow established procedures provided by air traffic control (ATC) and the airport authority. This includes verifying the assigned runway and using the correct approach and landing charts. Secondly, pilots should make use of navigational aids such as instrument landing systems (ILS), global positioning systems (GPS), and visual aids like runway markings and signage.

These aids help pilots to accurately identify their intended destination and runway. Maintaining situational awareness throughout the flight is crucial, and pilots should cross-reference visual cues with navigational aids to ensure they are on the correct path. In cases of uncertainty or confusion, pilots should communicate with ATC to clarify any discrepancies or seek guidance. By diligently following procedures and utilizing navigational aids, pilots can significantly reduce the risk of landing at the wrong airport or on the wrong runway.

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Answer:

It indicates that a force has 2 directions at the point at which they cross

Answer:

A. A field pointing in two directions

Answer:

The two rays, CY and DM are diverging rays and when extended behind the mirror, they appear to intersect each other at point M'. Therefore, the properties of the images formed here are formed behind the mirror, between the pole and principal focus (f), the images are diminished and are virtual and erect.

Explanation:

Answer:

This questions answers are on the baisis of where the object is placed and see the atachments to know more

When considering a pendulum swinging through a small angle, its period is independent of the amplitude of the oscillation. This is due to the principle of simple harmonic motion, where the period remains constant as long as the angle remains small and the system experiences a restoring force proportional to its displacement.

Consider a pendulum swinging through a small angle. The period of a pendulum is the time taken for one complete oscillation, which is defined as the time taken for the pendulum to swing from its highest point, through its equilibrium position, to its lowest point, and back again to its starting position.
The period of a pendulum is determined by two factors: its length and the acceleration due to gravity. According to the formula T = 2π√(L/g), where T is the period, L is the length of the pendulum, and g is the acceleration due to gravity, we can see that the period of a pendulum is proportional to the square root of its length, and inversely proportional to the square root of the acceleration due to gravity.
Therefore, for a pendulum swinging through a small angle, its period is independent of its amplitude, which is the maximum angle that the pendulum swings away from its equilibrium position. This is because for small angles, the period of the pendulum is approximately constant, and is not affected by the amplitude of the oscillation.
In summary, the period of a pendulum swinging through a small angle is independent of its amplitude, and is only determined by its length and the acceleration due to gravity.

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The initial horizontal velocity of the projectile is 22.1 m/s.

The given parameters;

The time of motion of the object is calculated as follows;

h = ut + ¹/₂gt²

where;

h = ¹/₂gt²

\(t = \sqrt{\frac{2h}{g} } \\\\t = \sqrt{\frac{2\times 25}{9.8} } \\\\t = 2.26 \ s\)

The initial horizontal velocity of the projectile is calculated as follows;

R = vₓt

\(v_x = \frac{R}{t} \\\\v_x = \frac{50}{2.26} \\\\v_x = 22.1 \ m/s\)

Thus, the initial horizontal velocity of the projectile is 22.1 m/s.

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The effect that this will have on the amplitude of your oscillation.is b.) The amplitude of oscillation will decrease.

The amplitude of an oscillating system is the magnitude of change in the oscillating variable with each oscillation. Sound waves in air, for example, are oscillations in atmospheric pressure, and their amplitudes are proportional to the pressure change during one oscillation.

When a wave travels through a medium, it loses energy as it moves. As the distance between the wave and its source grows, it spreads out over a larger and larger area. As the wave spreads through the medium, it loses energy and its amplitude decreases.

In this case, at the point of equilibrium, the cart and the skater will have maximum kinetic energy. By dropping the same bag, the energy is reduced. The amplitude of an oscillating pendulum decreases with time because of friction due to air

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On a whim, you are trying to stand in a cart attached to a strong spring. The spring is compressed and then released, and you oscillate back and forth, trying to maintain your balance. There is a sand bag in the cart.

At the instant you pass through the equilibrium (x=0) location of the spring, you drop the sandbag onto the ground, out of the cart.

Question: If you drop the sand bag out of the cart right at the equibrium location, what effect will that have on the amplitude of your oscillation? (choose correct choice):

a.) The amplitude of oscillation will increase.

b.) The amplitude of oscillation will decrease.

c.) There will be no effect on the amplitude.

The instantaneous power of the engine of the car is 121 kW.

The given parameters:

The force exerted by the car is calculated as follows;

\(F = \frac{m(v- u)}{t} \\\\F = \frac{1500(27.78-0)}{5.2 } \\\\F = 8013.46 \ N\)

The total force exerted on the engine is calculated as follows;

\(F= 8013.5 \ N + \ 700 \ N\\\\ F = 8713.46 \ N\)

The instantaneous power of the engine is calculated as follows;

\(P = F\bar v\\\\P = F \times (\frac{v-u}{2} )\\\\P = 8713.46 \times (\frac{27.78 -0}{2} )\\\\P = 1.21 \times 10^5 \ W\\\\P = 121 \ kW\)

Thus, the instantaneous power of the engine of the car is 121 kW.

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Apply third equation of kinematics

\(\\ \tt\hookrightarrow v^2-u^2=2as\)

\(\\ \tt\hookrightarrow (50)^2=2(200)(8)\)

\(\\ \tt\hookrightarrow 2500=16(200)\)

\(\\ \tt\hookrightarrow 200=2500/16\)

\(\\ \tt\hookrightarrow 200>156.25\)

Unfortunately the car cannot make it through

Answer:

No. The car could not make through the light.

Explanation:

Formula: \(s=ut+\frac{1}{2} at^{2}\)

where s is displacement, u is initial velocity, a is acceleration, t is time

Using the formula:

Distance: 50 * 3 + 1/2 * 8 * 3²

              : 186 meters

The car could not make it through.

Answer:

4 Newton

Explanation:

F=ma therefore 2kg*2m/s/s=4 Newton

Answer:

Think it is C

Explanation:

Not sure!!!

Answer:

Protista

Explanation:

Taxonomy can be defined as the process of naming, classification and description of living organisms such as plants and animals. Thus, the biological classification of living organisms based on similarities or characteristics such as eyes, number of legs, etc., is generally referred to as taxonomy.

Basically, taxonomy helps scientist to have a good understanding and knowledge when studying various organisms.

Furthermore, the eight (8) biological classification (taxonomy) used for grouping and organizing organisms are; kingdom, domain, phylum, family, order, class, species and genus.

An organism that has only one cell, big and has a nucleus is most likely a member of Protista. Thus, a Protista such as euglena, paramecium, amoeba, etc., have a nucleus and are unicellular.

A unicellular organism refers to a living organism that possess a single-cell while a multicellular organism has many (multiple) cells.

Answer:

Yes, a mixture can be made up of just elements and no compounds. The elements never experiance a chemical interaction and stay only in physical contact with each other.

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