Light waves are electromagnetic waves that travel at 3.00 x 10^8 m/s. The eye is most sensitive to light having a wavelength of 5.50 x 10^-7 m.
a. Find the frequency of this light wave.
b. Find its period.

Answer:

43.3 m/s.

Explanation:

Assuming the potential energy is due to the gravitational potential energy, we can use the conservation of energy to find the kinetic energy:

Total energy = Potential energy + Kinetic energy

Kinetic energy = Total energy - Potential energy

Kinetic energy = 300 J - 40 J = 260 J

However, we need to know the mass of the object to convert the kinetic energy to velocity. We can use the potential energy to find the mass:

Potential energy = mgh

40 J = m(9.81 m/s^2)(300 m)

m = 0.137 kg

Now we can use the kinetic energy to find the velocity:

Kinetic energy = (1/2)mv^2

260 J = (1/2)(0.137 kg)v^2

v^2 = (2*260 J) / 0.137 kg

v = 43.3 m/s (rounded to one decimal place)

Therefore, the kinetic energy is 260 J and the velocity of the object when it reaches the ground is 43.3 m/s.

Answer:

213K = 100. 56

189K = 87. 22

113K = 45

201K = 93. 88

Explanation:

The formula for F to C = ( 1. 8*C) + 32

So, C = (F - 32) ÷ C

Answer:its E

Explanation:

Explanation:

The Sun is the center of the solar system. What is the Sun? Earth's Sun may seem different to us, but it is a star like all the other stars located outside the solar system.

Answer:

refraction

i think i dont know dont take my answer just take it into consideration

Explanation:

The shattering of glass with the help of sound illustrates an example of resonance. Thus, the correct option for this question is C.

In physics, resonance may be defined as a type of phenomenon due to which an exterior force of a vibrating system significantly forces another system around it in order to vibrate with greater amplitude at a specified frequency of operation.

According to the context of this question, the resonance produced by the voice of Ella Fitzgerald results in the breaking or shattering of the glass. It exposes the glass to the sound wave that forces or to vibrate and distorts its shape. Physical phenomena like refraction, diffraction, and interference are related to the concept of light.

Therefore, the shattering of glass with the help of sound illustrates an example of resonance. Thus, the correct option for this question is C.

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Answer:

here is the answer .

Explanation:

If a Coronal Mass Ejection (CME) hit Earth, it would cause a huge power surge that could damage or destroy many electrical systems, including those used to power transportation systems. This would mean that many forms of transportation, including cars, buses, trains, and airplanes, could be out of commission for an indefinite period of time. There is also the possibility that communication systems, such as the internet and telephone networks, could be affected, making it impossible for people to effectively coordinate transportation.

As the wavelength changes in a single slit diffraction experiment, the intensity profile undergoes several changes. The primary factor that influences the intensity profile is the relationship between the slit width and the wavelength.

When the slit width is significantly larger than the wavelength, the resulting diffraction pattern displays a central bright maximum surrounded by alternating dark and bright fringes. The intensity decreases gradually as the distance from the central maximum increases. This pattern is characteristic of the single-slit diffraction phenomenon and is known as the single-slit diffraction pattern.
However, as the wavelength increases and approaches the size of the slit width, the diffraction pattern becomes broader, and the central maximum becomes wider. The bright fringes become less pronounced, and the overall intensity decreases.
Conversely, when the wavelength becomes much smaller than the slit width, the diffraction pattern becomes narrower, and the central maximum becomes sharper. The bright fringes become more pronounced, and the overall intensity increases.

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Answer:400 is the answer 1500-1100 is 400

Explanation:

η=out/in x 100%

η=1100/1500 x 100%

η=73%

Answer:

Energy stored in an object due to its position is Potential Energy. · Energy that a moving object has due to its motion is Kinetic Energy.

Explanation:

Answer:

To summarize, potential energy is the energy that is stored in an object due to its position relative to some zero position.

Holding a bow and arrow before shooting, The amount of energy stored before you race on track, And a roller coaster going to it's highest point staying there waiting to come down.

Answer:

Frequency

Explanation:

speed = wavelength * speed

The required density of the glass is given as 2.6 × 10³ kg/m³.

Volume is defined as the mass of the object per unit density while for geometry it is calculated as profile area multiplied by the length at which that profile is extruded.

Here,

Weight of glass in air = 52N
mg = 52N
m = 5.2 Kg

Now,
The difference in weight of glass in air and water,
Upthrust = Volume × density of water × g = 52-32
Volume × 1000 × 10 = 20
Volume = 2 × 10⁻³ m³

The density of glass = mass of glass/volume of glass
                           = 5.2/2 × 10⁻³
                           = 2.6 × 10³ kg/m³

Thus, the required density of the glass is given as 2.6 × 10³ kg/m³.

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Answer:

it is b on edge not d, well atleast for me it was b

Explanation:

Answer:

B) one battery, two switches, and three light bulbs

Explanation:

The wavelength of the light beam having a frequency of 6 × 1017 hz is 0.05 nm.

To calculate the wavelength of a light beam, we can use the formula:

λ = c/f

Where λ is the wavelength, c is the speed of light and f is the frequency of the light.

The speed of light is approximately 3 x 10^8 m/s, we can use this value to find the wavelength.

λ = c/f

λ = (3 x 10^8 m/s) / (6 x 10^17 Hz)

λ = 0.05 nm

So the wavelength of the light beam is 0.05 nm.

It's important to mention that the wavelength is inversely proportional to the frequency, meaning if the frequency is high the wavelength is short and if the frequency is low the wavelength is long.

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The kinetic energy of the system after the collision if the collision is elastic 2.25 joules.

This refers to a collision in which there is no net loss  in the system due to the collision.

An elastic collision is a collision where both the Kinetic Energy, KE, and momentum, p are conserved. that is KE0 = KEf and po = pf.

For mular for calculating Final kinetic energy KE :

Final kinetic energy KE = 1/2 m₁v₁² + 1/2 m₂v₂² = joules

where,

m₁ = The first object's mass

m₂ =The second object's mass

v₁²= The first object's velocity

v₂ = The second object's velocity

Given in the question:

m₁ = 2. 00 kilograms

m₂ =5. 00 kilograms

v₁²= 1. 50 meters/second

v₂ = 0 (this is becaues the object is stationary, not moving)

calculating Final kinetic energy KE :

KE = 1/2 *2. 00 *(1. 50 )² + 1/2  *5. 00* (0)²

  = 1/2 *2. 00 *2.25

    KE =2.25 joules

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Answer:

Velocity, V = 33.33 m/s

Explanation:

Given the following data;

Mass = 180grams to kilograms = 180/1000 = 0.18 kg

Kinetic energy = 100J

To find the speed;

Kinetic energy can be defined as an energy possessed by an object or body due to its motion.

Mathematically, kinetic energy is given by the formula;

\( K.E = \frac{1}{2}MV^{2}\)

Where;

K.E represents kinetic energy measured in Joules.

M represents mass measured in kilograms.

V represents velocity measured in metres per seconds square.

Substituting into the equation, we have;

100 = ½*0.18*V²

Cross-multiplying, we have;

200 = 0.18*V²

V² = 200/0.18

V² = 1111.11

Taking the square root of both sides, we have;

Velocity, V = 33.33 m/s

Answer:

The correct option is (b).

Explanation:

Given that,

The height of the object, h = 15 cm

Object distance, u = -44 cm

Image distance, v = -14 cm

We need to find the focal length of the lens. Using the lens formula.

\(\dfrac{1}{f}=\dfrac{1}{v}-\dfrac{1}{u}\\\\\dfrac{1}{f}=\dfrac{1}{(-14)}-\dfrac{1}{(-44)}\\\\f=-20.53\ cm\)

So, the focal length of the lens (-20.53 cm).

Answer:...........................

Explanation:.........................................

Answer:

yes

Explanation:

good job

Answer:

The meaning of life, or the answer to the question: "What is the meaning of life?", pertains to the significance of living or existence in general. Many other related questions include: "Why are we here?", "What is life all about?", or "What is the purpose of existence?"

Explanation:

The potential energy of an object has the following formula

         Potential energy = mgh

      where m = mass of the object

                   g = acceleration due to gravity

                   h = height of the object

This means that the potential energy of an object depends upon its mass, acceleration due to gravity, and height.

In the given situation we have a bucket full of water. If the mass and acceleration due to gravity are not changed, the only way the potential energy can be decreased is by reducing the height of the bucket full of water.

This can be done by: -

         (i) Lifting the bucket full of water in such a way that you

             decrease its height as compared to the bench.

        (ii) Put the bucket full of water on a stool whose height is

            lower than the bench.

Answer:

1.By decreasing it's contents- this decreases the weight of the bucket thus decreasing the potential energy of the bucket.

2.By decreasing the height of the bench we have decreased the amount of potential energy stored in the bucket

The final speed of the motorcycle is: 67 m/sec

Velocity is the pace and direction of an item's movement, whereas speed is the time rate at which an object is travelling along a route. In other words, although velocity is a vector, speed is a scalar quantity.

Given that,

initial speed of the motorcycle, u=25 m/sec

Acceleration of the motorcycle, a = 7 m/sec²

According to the equation of motion,

v = u + at

v = 25 m/sec + (7m/sec²) × (6 sec)

v = 67 m/sec

Thus, final speed of the motorcycle is: 67 m/sec

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We might anticipate seeing space at a high redshift being half as big as it is right now.

The redshift is caused by galaxies relocating away from the earth. What causes the movement is irrelevant. It makes no difference whether or not space is expanding, and it makes no difference why the galaxy is moving away from Earth. Similar to this, if a galaxy is stationary in relation to us, there won't be any redshift, and neither does it matter if space is expanding or even if all the other galaxies are accelerating their motion away from us.

Let's talk about this "expansion of space" thing now. We would never notice an expanding universe even if it existed. You see, if space were expanding as a whole, everything would be expanding, including our bodies, the entire Earth, the sun, and everything else. Thus, we wouldn't be aware. However, if space were only expanding where there was empty space, THEN that would account for why the far-off galaxies show a redshift.

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Answer:5250 N

Explanation: ig:iihoop.vince

The force of friction between the car's tires and the road is 5250 N

Centripetal force is the force that is perpendicular to an object moving in circular motion. It is given by:

F = mv²/r

where m is the mass of object, v is the velocity and r is the radius of circle.

Given that m = 700 kg, v = 30 m/s, r = 120 m, hence:

F = mv²/r = 700 * 30²/120 = 5250 N

The force of friction between the car's tires and the road is 5250 N

C) Straight up

If the ball is thrown vertically up, only the horizontal component of the runner and the ball will be the same, and in that case only he may catch the ball. To catch the ball, the horizontal component of the force on the ball and the runner should be the same.

The horizontal velocity component (vx) describes the influence of the velocity in displacing the projectile horizontally. The vertical velocity component (vy) describes the influence of the velocity in displacing the projectile vertically.

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A construction crane's cable lifts a 61.0-kg box upward with an acceleration of 1.46 m/s2. The tension in the rope will be 686.86 N

F net = F (tension ) - F (gravitation)

mass * acceleration =  F (tension ) - mg

F (tension ) = ma + mg

                   = m ( a + g )

                   = 61 ( 1.46 + 9.8 ) = 686.86 N

The tension in the rope will be 686.86 N

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The solar wind, with a constant temperature of 1.3x10^5 K and a speed of 450 km/s, is a highly ionized plasma.

The solar wind, which is a stream of charged particles (plasma) emitted by the Sun, exhibits characteristics of a highly ionized plasma. As it travels from the Sun to the Earth, the solar wind encounters variations in temperature, density, pressure, and speed. In this case, with a constant temperature of 1.3x10^5 K and a speed of 450 km/s, the solar wind can be classified as a highly ionized plasma.

During a Coronal Mass Ejection (CME), eruptive phenomena on the Sun's surface cause a sudden release of a large amount of plasma and magnetic fields into space. This disturbance leads to an increase in the temperature of the solar wind to around 10^7 K and an increase in its speed to approximately 10^3 km/s. This enhanced energy and velocity result in a significant disruption of the solar wind's flow, making it a turbulent fluid.

Turbulent fluids are characterized by chaotic and irregular motion, with strong fluctuations and mixing. The increased temperature and speed during a CME generate turbulent behavior within the solar wind, leading to the disruption and mixing of plasma particles along its trajectory.

To determine the type of fluid flow, the Reynolds number (Re) is often used. It relates the flow's characteristics, such as velocity and length, to the fluid's viscosity. In this case, since the solar wind is a plasma and has negligible viscosity, the Reynolds number is extremely high, well above the turbulent threshold of 4000. Therefore, the solar wind with increased temperature and speed due to a CME can be classified as a turbulent fluid.

In summary, the solar wind, with a constant temperature of 1.3x10^5 K and a speed of 450 km/s, is a highly ionized plasma. However, during a Coronal Mass Ejection (CME), the temperature and speed of the solar wind increase significantly, leading to turbulent fluid behavior.

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