distinguish between electromagnetic radiation that is reflected and electromagnetic radiation that is refracted

a) The amplitude is approximately 1.428 m.

b) The maximum acceleration is approximately 378.57 m/\(s^_2\).

c) The maximum force is approximately 785.4 N.

To track down the sufficiency, greatest speed increase, and most extreme power applied by the spring, we can utilize the standards of consonant movement.

a) The sufficiency (A) can be resolved utilizing the energy preservation guideline. At t = 0, the block is moving with a speed of - 10.0 m/s. Since there is no outer power following up on the framework, the complete mechanical energy is saved. The likely energy at the outrageous marks of the movement is zero, and the whole mechanical energy is as motor energy. In this way, we can compute the adequacy utilizing the recipe:

0.5 * k * \(A^_2\) = 0.5 * m * \(v^_2\)

0.5 * 550 N/m * \(A^_2\)= 0.5 * 2.00 kg * \((10.0 m/s)^_2\)

Tackling for A, we view as A = 1.428 m.

b) The greatest speed increase (amax) of the block can be resolved involving the condition for consonant movement:

amax = \(ω^_2\) * A

where ω is the precise recurrence. The precise recurrence can be determined as:

\(ω\)= sqrt(k/m)

\(ω\)= sqrt(550 N/m/2.00 kg) ≈ 16.61 rad/s

Subbing the qualities, we find:

amax =\((16.61 rad/s)^_2\) * 1.428 m ≈ 378.57 m/\(s^_2\)

c) The most extreme power (Fmax) applied by the spring can be determined utilizing Hooke's regulation:

Fmax = k * A

Subbing the given qualities, we have:

Fmax = 550 N/m * 1.428 m ≈ 785.4 N

In this way, the abundancy is roughly 1.428 m, the greatest speed increase is around 378.57 m/\(s^_2\), and the most extreme power applied by the spring is around 785.4 N.

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Answer:

According to Newton's third law of motion, the reaction force is equal to the action force.

Explanation:

Newton's third law of motion states that for every action there is an equal and opposite reaction. This means that if one object exerts a force on a second object, the second object exerts an equal force in the opposite direction. When Plate X pushes on Plate Y with the action force (Fx), Plate Y must push back with an equal force (Fy).

Therefore, the best explanation is that according to Newton's third law of motion, the reaction force is equal to the action force.

For every action, there has equal and opposite reaction - this statement best describes the action and reaction forces on the plates.

As a result of this interaction, there are two forces: one from plate X and one from plate Y. The third law of motion of Newton deals with these two forces, which are referred to as action and reaction forces. Newton's third law is officially expressed as follows: There is an equal and opposite reaction to every action.

The implication of the statement is that there are always two forces acting on the two interacting objects. The force acting on the first object is equal in size to the force acting on the second. The force acting on the first object is acting in the opposite direction to the force acting on the second object. Force pairs—equal and opposing action-reaction force pairs—always exist in pairs.

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Answer:

False

Explanation:

The mass of something does not depend on gravity. A planet has a constant gravitational force. Earth's is 9,80 N/kg. The moon, on the other hand, is 1,6 N/kg. the number of kilograms of something doesn't change if you go from one planet to another and since mass is measured in kilograms, mass doesn't change, therefore it does not refer to gravity. Mass refers to the quantity of matter in an object. It is weight that refers to the gravitational force on an object, since it is measured in newtons, and the amount of newtons per kilogram changes from planet to planet due to different gravity constants

The magnitude of the horizontal force F necessary to drag block B to the left at a constant speed can be determined by the frictional force acting on block B.

The frictional force acting on block B opposes its motion and determines the magnitude of the necessary horizontal force F. To calculate the frictional force, we use the equation: frictional force = coefficient of kinetic friction * normal force.

In this scenario, the coefficient of kinetic friction between all surfaces is given as 0.20. The normal force on block B is equal to its weight, which is 4.00 N. By multiplying the coefficient of kinetic friction by the normal force, we can determine the magnitude of the frictional force.

The magnitude of this force will be equal to the magnitude of the necessary horizontal force F required to counteract it and keep block B moving at a constant speed to the left.

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Answer:

Option (b) he is moving with a constant speed (on average)

Explanation:

To know which option is correct, let us calculate the speed at each time.

Case 1:

Distance = 10 yard

Time = 1 s

Speed =?

Speed = distance / time

Speed = 10 / 1

Speed = 10 yard/s

Case 2:

Distance = 20 yard

Time = 2 s

Speed =?

Speed = distance / time

Speed = 20 / 2

Speed = 10 yard/s

Case 3:

Distance = 30 yard

Time = 3 s

Speed =?

Speed = distance / time

Speed = 30 / 3

Speed = 10 yard/s

Case 4:

Distance = 40 yard

Time = 4 s

Speed =?

Speed = distance / time

Speed = 40 / 4

Speed = 10 yard/s

From the calculations made above, we can see clearly that the speed at each case is the same i.e constant. This is true because he is covering the same distance with respect to time.

This also means that the footballer is not accelerating as his speed remains the same i.e constant.

Thus, option B gives the correct answer to the question.

A 2.03 kg2.03 kg book is placed on a flat desk. A force of approximately 11.18 N is needed to begin moving the book.

To begin moving the book placed on a desk, a force equal to the maximum static friction force needs to be applied. The maximum static friction force can be calculated using the equation: maximum static friction force = coefficient of static friction * normal force. In this case, the normal force is equal to the weight of the book, which can be calculated as mass * acceleration due to gravity. Therefore, the force needed to begin moving the book can be determined by substituting the values into the equations.

The maximum static friction force is given by the equation: maximum static friction force = coefficient of static friction * normal force. The normal force, in this case, is equal to the weight of the book, which can be calculated as mass * acceleration due to gravity. Therefore, the equation can be written as: maximum static friction force = coefficient of static friction * (mass * acceleration due to gravity).

Substituting the given values:

maximum static friction force = 0.562 * (2.03 kg * 9.8 m/s^2) ≈ 11.18 N.

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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.

Answer:

I think the answer 1

Explanation:

im probably wrong too i dont know

The horizontal velocity of the projectile it leaves the launcher is 0.283 m/s.

The horizontal speed of a projectile is regular, and there's a vertical acceleration because of gravity; its cost is 9.8 m/s/s, down, The vertical speed of a projectile changes via nine.8 m/s every second, The horizontal motion of a projectile is impartial to its vertical movement.

Projectile motion is a form of motion experienced with the aid of an object or particle that is projected in a gravitational field, such as from Earth's floor, and movements alongside a curved route below the action of gravity best.

Projectile motion is the movement of an object thrown (projected) into the air. After the initial force that launches the item, it most effectively reports the pressure of gravity. The object is known as a projectile, and its route is called its trajectory.

Calculation:-

Horizontal distance = 40 cm

                          = 0.4 m

height of table = 10 m

Let vertical velocity is 0.

S = ut +1/2 at²

10 = 0 + 0.5 × 10 t²

t² = 10/5

t    = 1.414 sec.

At the same time, it will take to cover a horizontal distance of 0.4 m.

Velocity = distance/time

                = 0.4/1,414

                  = 0.283 m/s

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Answer:

6 kg

Explanation:

p = mv

Breaking the cart and frictional force from the road  will make a deceleration on the cart. The net force becomes in the opposite direction as the sign of acceleration is reversed.

Acceleration of an object is the measure of the rate of change in its velocity. It is a vector quantity and have both magnitude and direction. As the object is slowing down, the object is said to be decelerating.

If the cart is moving in a constant velocity it is having a constant magnitude but the acceleration is there if a change in direction. The deceleration is the opposite of the acceleration and the sign becomes negative thus not affecting the magnitude of   force.

Law of conservation of momentum states that, the total initial momentum of two colliding bodies is equal to the final momentum  of the bodies.

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A point's sound intensity level is expressed in logarithmic units of decibels (dB) as a ratio between the sound there and the threshold of hearing.

Whispering is audible at 30 dB. 40 dB: Quiet sounds from the library. Fridge at 50 dB. Electric toothbrush at 60 decibels.

In decibels, sound is measured (dB). A motorcycle engine running is around 95 dB louder than a whisper (30 dB louder than typical conversation). Long-term exposure to noise levels above 70 dB may cause hearing impairment. Your ears may get immediately harmed by loud noises over 120 dB.

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Answer:

c

Explanation:

An object's speed is the characteristic which is related to kinetic energy but not the potential energy. Thus, the correct option is C.

The kinetic energy of an object is the energy which it possesses due to the motion of the object. Kinetic energy is defined as the work which is needed to accelerate an object of a given mass from rest position to its stated velocity. Having gained this amount of energy during the acceleration of the object, the object maintains this kinetic energy unless its speed changes or it experiences acceleration.

Kinetic energy is directly proportional to the mass of the object and to the square of the velocity of the object, the expression is:

K.E. = 1/2 m × v²

where, KE = Kinetic energy,

m = mass of the object,

v = velocity of the object.

Therefore, the correct option is C.

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Answer:The first spacecraft which did not merely fly by a jovian (or giant) planet, but actually went into orbit around it for an extended period of time was option a, Galileo. The Galileo spacecraft was launched in 1989 and orbited Jupiter for almost eight years, from 1995 to 2003.

Explanation:

Answer:

a) x = 1353,2 m.

b) \(y_{max}\) = 236,9 m \)

c) \(t_{v} = 13,8 s\)

Explanation:

a) El alcance máximo se puede calcular usando la siguiente ecuación:

\( y = y_{0} + tan(\theta)*x - \frac{g}{2}*\frac{x^{2}}{(v_{0}cos(\theta))^{2}} \)   (1)

En donde:

y: es la altura final = 0

\(y_{0}\): es la altura inicial = 0

x: es el alcance

θ: es el angulo respecto a la horizontal = 35°  

\(v_{0}\): es la velocidad inicial = 120 m/s

g: es la gravedad = 10 m/s²

Resolviendo la ecuación (1) para x, tenemos:

\( x = \frac{2tan(\theta)*(v_{0}cos(\theta))^{2}}{g} = \frac{2tan(35)*(120 m/s*cos(35))^{2}}{10 m/s^{2}} = 1353,2 m \)          

El alcance máximo es 1353,2 m.

b) La altura máxima es:

\( y_{max} = \frac{v_{0}_{y}^{2}}{2g} = \frac{(v_{0}sen(\theta))^{2}}{2g} = \frac{(120 m/s*sen(35))^{2}}{2*10 m/s^{2}} = 236,9 m \)

Entonces, la altura máxima es 236,9 m.                                       

c) El tiempo de vuelo es el siguiente:

\(t_{v} = \frac{x}{v_{0}cos(\theta)} = \frac{1353,2 m}{120 m/s*cos(35)} = 13,8 s\)

Por lo tanto, el tiempo de vuelo es 13,8 s.

Espero que te sea de utilidad!

Answer:

below

Explanation:

Ice melts, meaning it has a watery layer upon its surface. This allows things to be moving like they are on a liquid but it has the solidity of a solid. The thin metal of the ice skates also decrease the surface area meaning it exerts more force but in turn, it allows you to move faster and further reduces friction.

a) The tangential speed of the ball is 1.26 m/s

b) The centripetal acceleration of the ball is 1.99 m/s^2.

We need to use the formulas for tangential speed and centripetal acceleration:

Tangential speed = radius x angular speed

Centripetal acceleration = (tangential speed)^2 / radius

Given:

Mass of the ball, m = 5.00 kg

Radius of the circle, r = 0.800 m

Angular speed, ω = 0.500 rev/s

We need to convert the angular speed from revolutions per second to radians per second:

ω = 0.500 rev/s x 2π rad/rev = 1.57 rad/s

(a) Tangential speed of the ball:

v = rω = 0.800 m x 1.57 rad/s = 1.26 m/s

(b) Centripetal acceleration of the ball:

a = v^2 / r = (1.26 m/s)^2 / 0.800 m = 1.99 m/s^2

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The types of particles of sand that would make up the location would be Fine sand and silt. Option a

Sand is a granular material composed of finely divided rock and mineral particles with a particle size range of 0.063 to 2 mm. The properties of sand can vary depending on factors such as the source of the sand, the size and shape of the particles, and the environment in which it is found. However, some general properties of sand include:

Particle size: Sand particles are typically larger than silt and clay particles but smaller than gravel particles. They range in size from 0.063 to 2 mm in diameter.

Texture: Sand has a gritty texture and is often used in abrasive applications, such as sandpaper or sandblasting.

Color: The color of sand can vary depending on the composition of the particles. For example, sand made from quartz crystals is typically white or light-colored, while sand made from iron-rich minerals may be darker in color.

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The wavelength of the wave can be calculated as λ = L / 3.

When a horizontal string is suspended between an oscillator and a pulley, the string passes over the pulley and is attached to a mass. When the oscillator is switched on, a standing wave with six antinodes is formed in the string.In standing waves, the wave amplitude is stationary and energy moves back and forth. The standing wave results from the interference of two waves of the same frequency, magnitude, and wavelength travelling in opposite directions through space with the same amplitude. When an oscillation is applied to a string, waves travel down the length of the string, and some of the waves is reflected at the end of the string.

At the opposite end of the string, the incident wave and reflected wave interfere to form standing waves. The number of antinodes in the string can be determined using the following formula: L = n λ / 2, where L is the length of the string, n is the number of antinodes, and λ is the wavelength of the wave. In this scenario, there are six antinodes in the string, which implies that the length of the string equals three times the wavelength of the wave.

Thus, the wavelength of the wave can be calculated as λ = L / 3.

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The complete question is-

Problem 8: A horizontal string is suspended between an oscillator on one end and a pulley on the other. The string passes over the pulley and is attached to a mass m. When the oscillator is switched on, a standing wave with 6 antinodes is formed in the string. As a factor of m, what is the next largest mass that will produce a standing wave? In other words, what is the smallest mass M>m that will produce a tanding wave? Assume the frequency of the oscillator remains the same throughout.

Answer:

In this case, the specific heat capacity of oxygen is 918 J/kg °C. That means that it takes 918 J of energy to raise 1 kg of oxygen by 1°C.

Explanation:

Specific heat is the amount of heat required to raise the temperature of a unit mass of a substance by one degree. Specific heat is also known as specific heat capacity or specific heat capacity.

In other words, it is defined as the amount of energy that we must contribute to increase its temperature.

The specific heat or heat capacity of a certain body is called by the letter "c".

The expression to calculate the specific heat of a substance is:

c = Q / m.Δt

where Q represents the heat energy transfer between the system and its environment, m the mass of the system and Δt the temperature variation to which it is subjected.

In this case, the specific heat capacity of oxygen is 918 J/kg °C. That means that it takes 918 J of energy to raise 1 kg of oxygen by 1°C.

The number that completes the sentence is 1 kg

Specific heat capacity is the amount of heat required to raise 1kg of the substance by 1 °C or 1 K. The S.I unit of specific heat capacity is J/kg°C

The substance in question is oxygen.

From the question,

If the specific heat capacity of oxygen is 918 J/kg°C, It means that it takes 918 J of energy to raise 1 kg of oxygen by 1°C.

Hence, The number that completes the sentence is 1 kg.

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An electric field with intensity ′E′ is applied to an electrical dipole with dipole moment ′p′. The dipole moves into a place where its axis forms an angle with the electric field.

Justification: Since electric fields are subject to the of superposition, the overall electromagnetic current of a system typically equal to the total of its individual electric fields. Each charge produces an electric field at pixel Value that is equal in size but moves in the opposite direction.

The flux through a surface is at its maximum when it is horizontal to field (left panels) and the paddock vector is parallel to a vector, A. When a surface is perpendicular to the field (figure 3d), no field lines intersect it and there is no flux through it.

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Answer:

An electrical potential is a difference in electric potential energy.

Explanation:

Electric potential is a location-dependent quantity that expresses the amount of potential energy per unit of charge at a specified location. ... If the electric potential difference between two locations is 3 volts, then one coulomb of charge will gain 3 joules of potential energy when moved between those two locations.

The electric potential, or voltage, is the difference in potential energy per unit charge between two locations in an electric field.

The layer of the sun involved in producing lights of different colorations is the corona.

The dancing streams of colored light observed is known as Aurora Borealis or Northern Lights. It is a natural light display in the Earth's atmosphere that occurs when charged particles from the sun's solar wind collide with atoms and molecules in the Earth's upper atmosphere.

The layer of the sun that is involved in producing the charged particles that cause the Northern Lights is the corona, which is the outermost layer of the sun's atmosphere. The corona is composed of extremely hot plasma with temperatures ranging from 1 to 3 million Kelvin.

When the sun is active, it releases coronal mass ejections that send charged particles hurtling toward Earth. When these particles collide with the Earth's atmosphere, they produce the beautiful and ethereal light show that is the Aurora Borealis.

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Answer:

Approximately \(1.5\; {\rm s}\).

(Assumptions: \(g = 9.81\; {\rm m\cdot s^{-2}}\); air resistance on the volleyball is negligible.)

Explanation:

Under the assumptions, acceleration of the volleyball would be \(a = (-g) = (-9.81)\; {\rm m\cdot s^{-2}}\) during the entire flight. (This value is negative since the ball is accelerating downwards- toward the ground.)

By the time the volleyball hits the ground, the volleyball would be at a position \(2.0\; {\rm m}\) below where it was launched. In other words, the (vertical) displacement of the volleyball during the entire flight would be \(x = (-2.0)\; {\rm m}\). (Negative since the ball is below where it was launched.)

Apply the SUVAT equation \((v^{2} - u^{2}) = 2\, a\, x\) to find the velocity of the volleyball right before hitting the ground. In this equation:

Rearrange this equation and solve for the velocity right before landing, \(v\). Note that because \(v\!\) is raised to the power of \(2\) in \((v^{2} - u^{2}) = 2\, a\, x\), both \(v = \sqrt{u^{2} + 2\, a\, x}\) and \(v = -\sqrt{u^{2} + 2\, a\, x}\) could satisfy this equation. However, \(v\!\!\) needs to be negative since the volleyball would be travelling downwards before reaching the ground.

Therefore, right before reaching the ground, velocity of the volleyball would be:

\(\begin{aligned} v &= -\sqrt{u^{2} + 2\, a\, x \\ &= -\sqrt{(6.0)^{2} + 2\, (-9.81)\, (-2.0)} \; {\rm m\cdot s^{-1}} \\ &\approx (-8.67)\; {\rm m\cdot s^{-1}}\end{aligned}\).

In other words, velocity of this volleyball has changed from \(u = 6.0\; {\rm m\cdot s^{-1}}\) (upwards) to \(v \approx (-8.67)\; {\rm m\cdot s^{-1}}\) (downwards) during this flight. Divide the change in the velocity \((v - u)\) by the rate of change in velocity \(a = (-9.81)\; {\rm m \cdot s^{-2}}\) to find the duration of this flight:

\(\begin{aligned}t &= \frac{v - u}{a} \\ &\approx \frac{(-8.67) - 6.0}{(-9.81)}\; {\rm s} \\ &\approx 1.5\; {\rm s}\end{aligned}\).

(2.2 ) The resultant of the forces are 19 N downwards and 4 N to the right.

(2.3 ) The resultant of the forces are 125 N downwards and 22 N to the right.

The resultant force on the object is the sum of all the forces acting on the object in a particular direction.

for the first given forces,

sum of the vertical forces = 12 N + 50 N - 6 N - 75 N  = 19 N downwards

sum of horizontal forces = 9 N - 5 N = 4 N to the right

for the second given forces,

sum of the vertical forces = -75 N - 50 N = 125 N  downwards

sum of horizontal forces = 45 N - 23 N = 22 N to the right

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The complete question is below:

2.2 Forces of 9 N acting horizontally to the right and 5 N in the opposite direction; 12 N acting vertically upwards and 6 N vertically downwards. Forces of 75 N acting vertically downwards and 50 N vertically upwards;

2.3 Forces of 75N acting vertically downwards and 50N vertically downwards;45 N horizontally towards the right and 23N in the opposite direction . find the resultant of each forces

The internal resistance of an automobile battery was found to be 2.2Ω

Explain about resistance ?

Resistance is a measure of an electrical circuit's resistance to current flow. Resistance is measured in ohms, which is represented by the Greek letter omega (Ω). Ohms are named after German scientist Georg Simon Ohm (1784-1854), who researched the link between voltage, current, and resistance. He is credited for developing Ohm's Law.

Electrical resistance is a barrier to current flow in a circuit.

While driving to a particular spot with your family, you may have noticed that when your driver encounters an impediment on the road, he slows down the automobile.

v=25.0v

emf=8.5v

current=7.5

Vint=16.5v

v=IRint

16.5=7.5(Rint)

=2.2 Ω

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A hair dryer provides about 10 ohms of resistance. When plugged into a typical outlet in Georgia, and then turned on, 1440 W is its power. Therefore, the correct option is option D.

The quantity of energy moved or transformed per unit of time is known as power in physics. The watt, or one joule per second, is the unit of power inside the International System of Units. Power is also referred to as activity in ancient writings. A scalar quantity is power.

Power is correlated with other factors; for instance, the power required to move a land vehicle is indeed the sum of the traction force just on wheels and aerodynamic drag.

power = voltage²×resistance

           =(120)²× 10

           =1440 W

Therefore, the correct option is option D.

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Answer:

lado

Explanation:

because it is easy to do