longitudinal wave is mechanical wave why​

Answer:

the answer is b

Explanation:

Answer:

0.10 A

Explanation:

Answer:

Planetary Model of the Hydrogen Atom

Anne Marie Helmenstine, Ph. D. The Bohr Model has an atom consisting of a small, positively charged nucleus orbited by negatively charged electrons. Here's a closer look at the Bohr Model, which is sometimes called the Rutherford-Bohr Model.

Explanation:

Answer:

planetary model

Explanation:

Niels Bohr proposed the Bohr Model of the Atom in 1915. ... The Bohr Model is a planetary model in which the negatively charged electrons orbit a small, positively charged nucleus similar to the planets orbiting the sun (except that the orbits are not planar).

Answer:

15 degrees

Explanation:

Let's assume that the initial velocity of the projectile is v0, the angle of projection is θ, and g is the acceleration due to gravity.

The maximum height reached by the projectile can be calculated using the formula:

H = (v0² sin²θ)/(2g)

The range of the projectile can be calculated using the formula:

R = (v0² sin2θ)/g

We want to find the angle θ at which the range is half the maximum height, i.e., R = H/2. Substituting the equations for H and R, we get:

(v0² sin²θ)/(2g) = (v0² sin2θ)/2g * (1/2)

sinθ cosθ = 1/4

Now, we can use the identity sin2θ = 2 sinθ cosθ to write:

sin2θ = 2 sinθ cosθ = 2 * (1/4) = 1/2

Taking the inverse sine of both sides, we get:

2θ = 30°

θ = 15°

Therefore, the angle at which the range of the projectile is equal to half the maximum height is 15 degrees.

I hope this helped :)

Answer:

A i think tell me if i got it right

Explanation:

Based on the location on the periodic table, Potassium (K) is the metal that will be less reactive than rubidium and more reactive than calcium.

Answer:

Box 1 has more mass than Box 2

Explanation:

The given parameters are;

The initial velocity of Box 1, v₁ = 4 km/hr right

The initial velocity of Box 2, v₂ = 8 km/hr left

The final velocity of Box 1, v₃ = 2 km/hr left

The initial velocity of Box 2, v₄ = 1 km/hr left

Let the mass of Box 1 = m₁, and the mass of Box 2 = m₂

We take the motion in the right direction and the motion in the left direction as negative, which gives;

The initial velocity of Box 1, v₁ = 4 km/hr

The initial velocity of Box 2, v₂ = -8 km/hr

The final velocity of Box 1, v₃ = -2 km/hr

The initial velocity of Box 2, v₄ = -1 km/hr

By the principle of conservation of linear momentum, we have;

The sum of initial momentum = The sum of the final momentum

m₁ × v₁ + m₂ × v₂ = m₁ × v₃ + m₂ × v₄

m₁ × 4 + m₂ × (-8) = m₁ × (-2) + m₂ × (-1)

m₁ × 4 - 8 × m₂ = -2 × m₁ -  m₂

m₁ × 4 + 2 × m₁  = 8 × m₂ -  m₂ = 7 × m₂

6 × m₁  = 7 × m₂

m₁  = 7/6 × m₂ = 1.1\(\bar 6\)·m₂

m₁  = 1.1\(\bar 6\)·m₂

∴ m₁  > 1 × m₂

m₁  >  m₂

Box 1 has more mass than Box 2.

Answer:

Box 1 has more mass than Box 2.

Explanation:

Box 1 has more mass than Box 2.

Answer:

the awnser is c The salinity of ocean water decreases and the temperature of ocean water increases as the depth increases.

Answer:

30 µT

Explanation:

The longer the time between the arrival of the P-wave and S-wave, the farther away is the epicenter.

Hence, Option B is the correct answer.

Learn more about epicenter,

https://brainly.com/question/28136716

#SPJ1

Answer:C car

Explanation:

Answer:

v = 8.65 m/s

Explanation:

Given that,

Distance covered by the doge, d = 45 m

Time taken, t = 5.2 s

We need to find its average speed. The total distance covered divided by the total time taken is called the average speed of an object. So,

\(v=\dfrac{45\ m}{5.2\ s}\\\\=8.65\ m/s\)

So, the average speed is 8.65 m/s.

The phrase "like dissolves like" can be described as the compounds which have similar nature dissolve in each other that is polar dissolves polar and non-polar dissolves non-polar molecules.

Polarity is the separation of electric charge which is leading to a molecule or the chemical groups which are having an electric dipole moment, with a negatively charged end and a positively charged end as well. Polar molecules are the molecules which must contain one or more polar bonds which occur due to a difference in the electronegativities between the bonded atoms of the molecule.

A simple way to predict the compounds which will dissolve in other compounds is the phrase of the compound such as "like dissolves like". This means that the polar compounds dissolve in polar compounds, and the nonpolar compounds dissolve in nonpolar compounds, however, the polar and nonpolar molecules do not dissolve in each other.

Learn more about Polarity here:

https://brainly.com/question/30002497

#SPJ1

Answer:

300 m.

Explanation:

From the question given above, the following data were obtained:

Initial velocity (u) = 15 m/s

Final velocity (v) = 25 m/s

Time (t) = 15 secs

Distance (s) =?

The distance travelled by the motorbike can be obtained as follow:

s = (u + v)t / 2

s = (15 + 25) × 15 / 2

s = 40 × 15 / 2

s = 600 / 2

s = 300 m

Thus, the distance travelled by the motorbike is 300 m.

The frequency of a wave with a wavelength of 0.39 m and a speed of 86 m/s can be calculated using the formula: frequency = speed / wavelength. Substituting the given values into the formula, we find that the frequency of the wave is approximately 220.51 Hz.

The frequency of a wave refers to the number of complete cycles or oscillations it undergoes per second. It is measured in hertz (Hz). To calculate the frequency of a wave, we need to use the formula: frequency = speed / wavelength.

Given values:

Wavelength (λ) = 0.39 m

Speed (v) = 86 m/s

Using the formula: frequency = speed / wavelength

frequency = 86 m/s / 0.39 m

Dividing the speed (86 m/s) by the wavelength (0.39 m), we find:

frequency ≈ 220.51 Hz

Therefore, the frequency of the wave with a wavelength of 0.39 m and a speed of 86 m/s is approximately 220.51 Hz.

For more such questions on frequency, click on:

https://brainly.com/question/254161

#SPJ8

Answer:

60 - 45 = A. 15

Explanation:

Subtracted because the plane mirror at an angle is incidence of 60°, so then in order to find the value it would be 60-45 and not adding it or dividing and multiplying to find the value thus the answer is 15.

60 - 45 = A. 15. Subtracted because the plane mirror at an angle is incidence of 60°, so then in order to find the value it would be 60-45 and not adding it or dividing and multiplying to find the value thus the answer is 15.

A flat or highly polished surface called a plane mirror reflects light or waves to create an image. It is a polished, smooth surface that creates a virtual representation of the actual object.

A plane mirror is a surface on which an image can only be produced by at least two light beams. The intersection of these two beams can occur inside the mirror or appear to occur somewhere behind the mirror.

The image that follows illustrates how an object appears when viewed via a plane mirror.

Therefore, 60 - 45 = A. 15. Subtracted because the plane mirror at an angle is incidence of 60°, so then in order to find the value it would be 60-45 and not adding it or dividing and multiplying to find the value thus the answer is 15.

To learn more about Plane mirror, refer to the link:

https://brainly.com/question/13101215

#SPJ2

Answer: 125 m/s

Multiply 15 m/s by 5.0 minutes, because this will give you the product.

15 x 5.0 = 125.

Add the m/s sign to the 125. 125 m/s.

Answer = 125 m/s. Hope this helps!

Answer:

In case of uniformly accelerated motion along a straight path

Explanation:

\(\sf{}\)

hope it's helpful to you ☺️

Answer:

Explanation:

dwadad

Answer:

Microwaves are widely used in modern technology, for example in point-to-point communication links, wireless networks, microwave radio relay networks, radar, satellite and spacecraft communication, medical diathermy and cancer treatment, remote sensing, radio astronomy, particle accelerators, spectroscopy, industria.

Explanation:

Answer:

I think it's b and I'm sorry if it's wrong

Two masses oscillating together with each of their time period as ,'T'

Option B

we know that,

The time period of a mass 'm' on a spring of spring constant 'k' can be strategize by the following equation :

\( \huge \rightarrow \: T \: = 2π \sqrt{ \frac{m}{k} } \)

According to the question,

so,

The new time period would be

\( \huge \rightarrow \: T ' \: = 2π \sqrt{ \frac{2m}{2k} } \)

\( \huge \rightarrow \: T ' \: = 2π \sqrt{ \frac{m}{k} } \)

\( \huge \rightarrow \: T ' \: = T\)

Hence ,option B is correct ✓

The gravitational force between two objects depends on their masses and the distance between them.

In this scenario, we will assume that the four balls have the same mass. When considering the force between the bottom two balls, the distance between them is shorter compared to the top two balls. The force of gravity is inversely proportional to the square of the distance between the objects. Therefore, as the distance between the balls decreases, the gravitational force between them increases.

Conversely, when considering the force between the top two balls, the distance between them is larger than that between the bottom two balls. Since the force of gravity decreases with an increase in distance, the gravitational force between the top two balls will be smaller compared to the bottom two balls.

To put it simply, the closer the objects are to each other, the stronger the gravitational force between them. In the case of the bottom two balls, their proximity results in a stronger gravitational force between them. On the other hand, the top two balls are farther apart, leading to a weaker gravitational force between them.

This phenomenon follows Newton's law of universal gravitation, which states that the gravitational force between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.

know more about gravitational force here:

https://brainly.com/question/72250

#SPJ8

Answer:

The amplitude of the resulting oscillations can be calculated using the formula:

A = F/mω^2

where F is the amplitude of the applied force, m is the mass of the object, and ω is the angular frequency of the applied force.

In this case, F = 4.8 N, m = 2.0 kg, and ω = 3.0 rad/s.

Substituting these values into the formula, we get:

A = 4.8/(2.0 x (3.0)^2) = 0.267 m or 0.27 m (rounded to two significant figures)

Therefore, the amplitude of the resulting oscillations is 0.27 m, which is closest to option A) 0.15 m.

Explanation:

Answer:

Explanation:

A simple pendulum consists of a mass (usually represented as a small object or bob) attached to a string or rod of negligible mass. The mass is free to swing back and forth under the influence of gravity.

In the figure, the point of suspension is denoted by "O," and the mass (bob) is represented by the small circle. The string or rod is represented by the vertical line connecting the point of suspension to the bob.

Amplitude:

The amplitude of a pendulum refers to the maximum displacement or swing of the bob from its equilibrium position. In the figure, the amplitude can be represented by the angle formed between the vertical position and the position of the bob when it swings to its maximum distance on one side. It is usually denoted by the symbol "A."

Effective Length:

The effective length of a pendulum refers to the distance from the point of suspension to the center of mass of the bob. It represents the distance over which the mass swings back and forth. In the figure, the effective length can be measured as the length of the string or rod from the point of suspension to the center of the bob. It is usually denoted by the symbol "L."

It is important to note that the amplitude and effective length of a simple pendulum affect its period of oscillation (the time taken for one complete swing). The relationship between these parameters and the period can be described by mathematical formulas.

Overall, the simple pendulum is a fundamental concept in physics and provides a simplified model for understanding oscillatory motion and the principles of periodic motion.

Thermal Energy will increase. This change will occur in a system with increasing entropy.

Entropy:

Entropy is a measure used to determine how chaotic or random a system is. It is a state function in thermodynamics that specifies how energy is distributed and how much energy is available to do meaningful work. As entropy tends to increase over time, the energy available to do work decreases. According to the second law of thermodynamics, the overall entropy of a closed system does not decrease, which means that energy tends to spread out and become more disordered. Many fields of science, such as chemistry, physics, and biology, as well as many practical applications, such as energy conversion, information theory, and materials science, rely on an understanding of entropy.

Thermal Energy:

The term "thermal energy" is used loosely in various contexts in physics and engineering. It can refer to several different well-defined physical concepts. These include the internal energy or enthalpy of matter and radiation; heat, defined as a transfer of energy (such as thermodynamic work); and clean energy of a certain type. Every object or substance has thermal energy - the sun is the greatest source of thermal energy in our solar system. Heat is the transfer of energy from one object or substance to another, that is, a flow of thermal energy.

Learn more about Thermal energy:

https://brainly.com/question/18989562

#SPJ4

If two waves in the same space interfere completely constructively, the amplitude increases.

What is amplitude of a wave?

It is the maximum displacement moved by the wave from its point of equilibrium.

The constructive interference in the two waves occurs when both the waves come together and this results in them being in phase with each other. This means that the oscillation at the given point are in the same direction and due to this the resulting amplitude is larger than the amplitude of the particular wave. Constructive interference can produce a significant increase in the amplitude. For example: if 100 waves of equal amplitude interfere constructively, then the amplitude is 100 times more than the actual amplitude of the wave.

To know more about amplitude, click on the following link

https://brainly.com/question/3613222

#SPJ1

As the car is moving in a circle, the centripetal force, F acting on the car is given as F = mv² / r

The maximum force of static friction that can act on the car is given as f = μsN

where μs is the coefficient of static friction, and N is the normal force acting on the car.

Substituting the values in the formula, we get\(N = mg = 1500 kg × 9.8 m/s² = 14700 N\)

where g is the acceleration due to gravity.

Substituting the values in the formula, we get f = μsN= μs × 14700 N

The maximum value of the force of static friction is given as f = μsN.The centripetal force is given as F = mv² / r

Substituting the maximum value of the force of static friction in the formula, we getμsN = mv² / r

Substituting the values, we get

\(μs × 14700 N = 1500 kg × (23 m/s)² / 65 mμs = (1500 kg × (23 m/s)² / 65 m) / 14700 Nμs = 0.738\)

This means that the minimum coefficient of static friction required to keep the car on the curve is 0.738.

Therefore, the minimum value of the coefficient of friction which would be required to keep Justin's car on the curve is 0.738.

To know more about centripetal force visit :

https://brainly.com/question/14021112

#SPJ11

The final eqilibrium tempreture of the tin water mixture, given that the was initially at 10 °C is 18.5 °C

The equilibrium temperature of the tin and water mixture can be obtained as follow:

From calorimetry, we understood that:

Heat loss = Heat gain

MC(T - Tₑ) = MᵥᵥC(Tₑ - Tᵥᵥ)

Inputting the various parameters, we have:

0.225 × 230 (97.5 - Tₑ) = 0.115 × 4184(Tₑ - 10)

51.75(97.5 - Tₑ) = 481.16(Tₑ - 10)

Clear bracket

5045.625 - 51.75Tₑ = 481.16Tₑ - 4811.6

Collect like terms

5045.625 + 4811.6 = 481.16Tₑ + 51.75Tₑ

9857.225 = 532.91Tₑ

Divide both side by 532.91

Tₑ = 9857.225 / 532.91

Tₑ = 18.5 °C

Thus, from the above calculation, we can conclude that the equilibrium temperature is 18.5 °C

Learn more about temperature:

https://brainly.com/question/12910957

#SPJ1

Answer:

which is necessary to keep the building warm. Light colors reflect the light hence they are wisely used in tropical ...

Here in the US, not all houses are painted dark colors. In years past, it was common for the ...

Dark colors absorb heat, which is why houses in cold countries are painted with dark colours.

Answer:

B

Explanation:

In this process on merry go round there is not any external torque so angular momentum will be conserve. Mass is always conserved.