that which travels in waves that are not the same length is called

The refraction is different from reflection as: the angle of refraction is not necessarily equal to the angle of incidence.

Refraction is defined as the shift in a wave's direction when it travels from one medium to another.

Although light refraction is one of the most frequently seen phenomena, refraction can also occur with sound and water waves. We can use optical tools like lenses, prisms, and magnifying glasses thanks to refraction. We can focus light on our retina because of the refraction of light, which is another benefit.

Reflection is the phenomenon of light rays returning to the source after striking an obstruction. It resembles the way a ball bounces when we toss it on a hard surface.

Some of the light rays that strike an object are reflected, some of them travel through it, and the remainder are absorbed by the object.

Mirrors are objects that completely reflect all light rays that strike them. Mirrors therefore demonstrate the phenomenon of light reflection.

Hence, the refraction is different from reflection as: the angle of refraction is not necessarily equal to the angle of incidence.

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Answer:

Y

Explanation:

next to Y

Answer:

what is the potential energy of a 5 kg apple that is sitting on a 1.5 m high tree branch

Explanation:

Hello!

I believe the answer is D) 1.9 × 10^3 watts.

I hope it helps!

The force on an electron moving perpendicular to a magnetic field of 1.5 teslas at 2.5 × 10⁵ meters/second is calculated to be -6.0 × 10⁻¹⁴ newtons, using the formula F = qvB.

The force on an electron moving perpendicular to a magnetic field can be calculated using the Lorentz force equation, which states that the magnetic force (F) exerted on a moving charge in a magnetic field is the product of the charge (q), its velocity (v), and the magnetic field strength (B), and is given by F = qvB when the velocity is perpendicular to the magnetic field. In this case, the electron has a charge of -1.6 × 10-19 coulombs, is moving at a velocity of 2.5 × 105 meters/second, and the magnetic field strength is 1.5 teslas.

Therefore, to calculate the force on the electron:

Note that the negative sign indicates the force direction according to Fleming's left-hand rule, opposite to the conventional current direction.

Using the Lorentz force equation, the force on an electron moving at 2.5 x 10^5 m/s perpendicular to a 1.5 T magnetic field with a charge of -1.6 x 10^-19 C is calculated to be -6.0 x 10^-14 N. The negative sign represents the direction opposite to the magnetic field.

The force on an electron in a CRT (Cathode-Ray Tube) when it's moving perpendicular to a magnetic field can be determined by using the Lorentz force equation for magnetic force, which is F = qvBsin(\u03b8), where F is the force, q is the charge, v is the velocity of the particle, B is the magnetic field strength, and \u03b8 is the angle between the velocity and the magnetic field. In this case, the electron is moving perpendicular to the field, so \u03b8 = 90 degrees, and sin(90) = 1. Substituting the given values:

F = (-1.6 \u00d7 10^{-19} C)(2.5 \u00d7 10^{5} m/s)(1.5 T)

Since sin(90) = 1, the equation simplifies to:

F = (-1.6 \u00d7 10^{-19} C)(2.5 \u00d7 10^{5} m/s)(1.5 T)

After calculating, the magnetic force acting on the electron is:

F = -6.0 \u00d7 10^{-14} N

The negative sign indicates the direction of the force is opposite to the direction of the magnetic field, following Fleming's left-hand rule for the direction of magnetic force on a moving charge.

The maximum speed of the object is 15.70 m/s

Given data:

The mass of object attached to horizontal spring is, m = 1.00 kg.

The stretching distance is, x = 0.500 m.

Time interval is, t = 0.100 s.

The linear velocity of spring - mass system is given as,

[tex]v = x \times \omega[/tex]

Here, [tex]\omega[/tex] is an angular speed. Solving as,

[tex]v = x \times (2 \pi f )\\\\v = x \times (\dfrac{2 \pi}{T} )[/tex]

Time period (T) for complete oscillation is, [tex]T = 2t[/tex].

[tex]v = x \times (\dfrac{2 \pi}{ 2 t} )\\v = 0.500 \times (\dfrac{ \pi}{0.100} )\\v =15.70 \;\rm m/s[/tex]

Thus, the maximum speed of the object is 15.70 m/s.

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From the calculations, we can see that the work done in the gravitational field is 228000J

The work done in a gravitational field depends on the height of the body hence we have;

Work done = mgh

m = 600 kg

g = 10 m/s^2

h = 38 m

Hence

W = 600 kg *  10 m/s^2 * 38 m = 228000J

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Final answer:

The final kinetic energy of the 72.0-kg skydiver falling at a terminal velocity of 79.0 m/s is 226,584 Joules, rounded to the thousands place as 227,000 Joules.

Explanation:

Kinetic energy (KE) can be calculated using the formula KE = 1/2 × mass × velocity^2. In this case, the mass (m) is 72.0 kg and the velocity (v) is 79.0 m/s. Plugging these values into the formula yields KE = 1/2 × 72.0 kg × (79.0 m/s)^2, which calculates to approximately 226,584 Joules. As instructed, rounded to the nearest thousand, the kinetic energy is given as 227,000 Joules, including the units which are crucial for expressing energy. This demonstrates the considerable amount of energy a body can have due to its motion, and emphasizes the importance of accurate calculations when dealing with physical quantities like kinetic energy.

Answer: 1. c . Nebula

2. a. low mass red star

3. d. turn into white dwarfs

4. c. 10 billion years

Explanation:

Helium , Neon , argon, xenon and radon  all are noble gases and have full valence shell of electron

The noble gases (Group 18) are located in the far right of the periodic table and were previously referred to as the "inert gases" due to the fact that their filled valence shells (octets) make them extremely nonreactive.

The 18th group in the modern periodic table is of noble gases, because their outer most shell is completely filled as it have 8 electrons in the outermost shell , except helium which have 2 electrons in outermost shell ( He have only one shell )

Helium , Neon , argon, xenon and radon  all are noble gases and have full valence shell of electron

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The frequency corresponding to a period of 4.31 seconds is approximately 0.232 Hz, calculated using the formula for frequency and period (f = 1/T).

The subject of this query is on the concept of frequency in relation to period, which is a topic studied in Physics. The relationship between frequency (f) and period (T) is given by the equation f = 1/T. In this context, the given period T is 4.31 seconds.

Applying this to the equation results in f = 1/4.31 Hz. Therefore, the frequency corresponding to a period of 4.31 seconds is approximately 0.232 Hz.

The SI unit for both frequency and period are inverse to each other-- with frequency being in Hertz (Hz), defined as oscillations per second, and period being in seconds, defined as the time for one complete cycle of oscillation.

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C.) Electric Energy

The kinetic energy of a 1500 kg object moving at a velocity of 10 m/s is 75000 Joules.

The kinetic energy of an object can be calculated using the formula KE = 1/2 * mass * velocity^2. Plugging in the given values for the mass (1500 kg) and velocity (10 m/s):

KE = 1/2 * 1500 * (10)^2

Simplifying the equation:

KE = 1/2 * 1500 * 100

KE = 75000 J

Therefore, the kinetic energy of the object is 75000 Joules.

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The maximum gauge pressure in a hydraulic lift is 18.0 atm, the largest size vehicle (in terms of weight) that the hydraulic lift can lift is approximately 112,336.84 kg.

We must weigh the weight of the vehicle and the pressure imposed by the lift to find the largest size vehicle that can be lifted by a hydraulic lift with a maximum gauge pressure of 18.0 atm.

r = d / 2

r = 28.0 cm / 2

r = 14.0 cm

r = 0.14 m

A = π *[tex]r^2[/tex]

A = π * [tex](0.14 m)^2[/tex]

A  ≈ 0.0616 [tex]m^2[/tex]

1 atm = 101,325 Pa

18.0 atm = 18.0 * 101,325 Pa

≈ 1,823,850 Pa

Substituting the values into the formula:

Force = (1,823,850) * (0.0616) ≈ 112,336.84 N

Now, we can calculate the weight (W) of the largest vehicle that can be lifted using the formula:

Weight = Force

Thus, the largest size vehicle (in terms of weight) that the hydraulic lift can lift is 112,336.84 kg.

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Your question seems incomplete, the probable complete question is:

The maximum gauge pressure in a hydraulic lift is 18.0 atm what is the largest size vehicle "What is the largest size vehicle (kg) it can lift if the diameter of the output line is 28.0 cm? "

Serena's experiment has flaws including the absence of a control group and the failure to isolate variables, which makes it difficult to determine the exact cause of the marble discoloration.

Two flaws in Serena's experiment design:

Lack of Control Group: Serena should have had a control group of white marble exposed to clean air to compare the discoloration caused by pollutants accurately.

Insufficient Variables: Serena only considered air pollutants and wind speed as factors, neglecting other variables like humidity, temperature, or types of pollutants.

Two flaws in Serena's experiment design are evident: the lack of a control group and the lack of variable isolation. A control group is necessary to compare changes in marble coloration without any exposure to pollutants. Without this, it is impossible to ascertain if the discoloration is solely due to the pollutant exposure or if there are other environmental factors at play.

Furthermore, Serena exposed some marble samples to both air pollutants and varying wind speeds without having a sample with a constant wind speed. This means that the specific effects of each air pollutant could not be isolated, as the wind variation could have contributed to the discoloration. For a better understanding of the pollutants' effects, each variable (pollutant and wind speed) should be tested independently.

The answer is : you can decode the manifest content in your dreams.  

Answer:

option (A)

Explanation:

m = 4.4 kg, u = 9.2 m/s, v = - 2.5 m/s

M =

U = 0

V = ?

By use of conservation of momentum

mu + M x 0 = mv + MV

4.4 x 9.2 + 0 = 4.4 x (- 2.5) + M x V

40.48 + 11 = M V

MV = 51.48       ......(1)

By using the conservation of kinetic energy

0.5 x m x u^2 + 0 = 0.5 x m v^2 + 0.5 x M V^2

4.4 x 9.2 x 9.2 = 4.4 x 2.5 x 2.5 + MV^2

372.416 - 27.5 = MV^2

MV^2 = 344.9   ...... (2)

Dividing equation (2) by equation (1)

V = 6.7 m/s

So, the correct option is (A)

Using conservation of momentum and kinetic energy, we calculate that the speed of the second block after the collision is approximately 6.4 m/s. Therefore, the correct answer is A) 6.4 m/s.

Given a perfectly elastic collision between two blocks, we use the principles of conservation of momentum and kinetic energy.

Step-by-Step Solution:

Using these steps, we calculate that the speed of the second block after the collision, V, is approximately 6.4 m/s. Therefore, the correct answer is A) 6.4 m/s.

it is a. compression