How can liquid pressure phenomena be used in daily life. Give one example with explanation of working​?

Given, Speed of the sound, v=675 m/s

The wavelength of the wave, λ=15 m

Relation between speed, wavelength, and frequency of a wave is given by

Where f is the frequency of the sound.

On substituting the known values,

Which gives us,

Therefore the frequency of the sound in the given medium is 45 Hz.

Answer:

11250

Explanation:

E=mgh=75*10*15=11250

Answer: D. Cobalt

Explanation: Cobalt has excellent magnetic properties so it is D. Cobalt.

The element which has magnetic properties from the given list of elements would be cobalt , therefore the correct answer is option C.

The elements of the periodic tables that behave as metals, as well as the nonmetal in some chemical or physical aspects, are known as metalloids. Some examples of metalloids are Boron , silicon , germanium, arsenic , antimony , tellurium , etc.

As given in the problem we have to find out the element which possesses the magnetic properties from the given list ,

Calcium belongs to group 2 of the periodic table and nonmagnetic element . Similarly , carbon is a nonmagnetic material .

Thus , the element which has magnetic properties from the given list of elements would be cobalt, therefore the correct answer is option C .

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Answer:

Multiply the length, width and height of the brick to calculate its volume.

Explanation:

To find the volume of a rectangular brick, you need to multiply its length, width, and height.

The rectangular brick is 400 cubic centimeters (cm³).

The formula to calculate the volume of a rectangular prism (which includes a rectangular brick) is:

\(\[ \text{Volume} = \text{Length} \times \text{Width} \times \text{Height} \]\)

Let's assume the length of the rectangular brick is 10 cm, the width is 5 cm, and the height is 8 cm. Plugging these values into the formula, we get:

\(\[ \text{Volume} = 10 \, \text{cm} \times 5 \, \text{cm} \times 8 \, \text{cm} \]\)

Now we can calculate the volume:

\(\[ \text{Volume} = 400 \, \text{cm}^3 \]\)

Therefore, the volume of the rectangular brick is 400 cubic centimeters (cm³).

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Answer:

0.71s

Explanation:

From Newton's law of motion ;

V =U +gt

V is the final velocity or speed

U is the initial velocity or speed

g is acceleration of free fall due to gravity given as 9.8m/S2

Note when a body moves horizontally down its said to do so with the aid of the force of gravity

Hence the final velocity is aided by gravity.

From the above formula;

t =V-U/ g

t= 12-5/ 9.8 = 0.71s

Answer: .71

Explanation:

Khan academy

The density of the scattering material and the atomic number of the material may affect the probability of scattering but do not directly influence the change in wavelength. So the correct answers are A and B.

In the Compton effect experiment, the change in a photon's wavelength depends on the scattering angle and the initial wavelength of the photon. The Compton effect is the result of the interaction of a photon with a charged particle, typically an electron. When a photon collides with an electron, it transfers some of its energy to the electron, causing the photon to scatter at a different angle and with a different wavelength. The amount of energy transferred to the electron depends on the initial energy of the photon, which is related to its wavelength, and the angle of scattering. The final wavelength of the scattered photon can be calculated using the initial wavelength and scattering angle. The density of the scattering material and the atomic number of the material may affect the probability of scattering but do not directly influence the change in wavelength. (Option A & B)

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Answer:

c

Explanation:

Answer:

Reaction force

Explanation:

According to Newton's third law of motion, for every action, there is an equal opposite reaction.

Hence the reaction force is often equal in magnitude to the applied force but acts in a direction opposite to the direction of the applied force.

Hence, when a baseball player, gets a hit, the ball exerts a reaction force on the player which is equal in magnitude to the force with which the player hits the ball but opposite in direction.

Given:

Three types of materials A, B, and C are there.

The coefficient of absorption of A is 30 %, B is 47 %, and C is 62 %.

To find:

Which material would you recommend and why?

Explanation:

Soundproofing is usually achieved by using materials that absorbed or reduce sounds. The coefficient of absorption of a material refers to that material's ability to absorb sound. The higher the percentage of a material absorption coefficient, the better the material's ability to absorb sound.

Hence, the material with a 62 % absorption coefficient that is Sample C has the greatest ability of the three materials to absorb sound effectively.

B) Sample C, because the percentage of the energy in an incident wave that remains in a reflected wave from this material is the smallest.

Answer:

Given:

Three types of materials A, B, and C are there.

The coefficient of absorption of A is 30 %, B is 47 %, and C is 62 %.

To find:

Which material would you recommend and why?

Explanation:

Soundproofing is usually achieved by using materials that absorbed or reduce sounds. The coefficient of absorption of a material refers to that material's ability to absorb sound. The higher the percentage of a material absorption coefficient, the better the material's ability to absorb sound.

Hence, the material with a 62 % absorption coefficient that is Sample C has the greatest ability of the three materials to absorb sound effectively.

B) Sample C, because the percentage of the energy in an incident wave that remains in a reflected wave from this material is the small

The force of 454.4 N is required to give a mass of 71 kg and an acceleration of 6.4 m/s²​.

Force can be explained as the influence that is capable of changing the state of the body of motion or rest. The S.I. unit of measurement of force is Newton and force is a vector parameter. Force exerted on a body can change the direction as well as the speed of the moving body.

The force exerted on a system can be calculated from the product of the mass (m) and acceleration. The mathematical expression of the 2nd law of motion for force can be represented as:

F = ma

Given, the mass of the acting on an object, m = 71 Kg

The acceleration acting on an object, a = 6.4 m/s²​

The force acting on the given mass can be calculated as:

F = ma = 71 × 6.4

F = 454.4 N

Therefore, the force required on an object is equal to 454.4 N.

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Answer:

Hi, Im Jenna! Here is ur ansswer Pls mark as braijnliest

Explanation:

solution.

The formula for linear expansivity is

α = (If – If) / If (0f – 0i ) is used to determine the linear expansivity

If – final length,

I – initial length

0f – final tempt.

0i – initial tempt.

(b) (ii)

I = 3 m

0 = 29oC

02 = 41oC

α = 1.0 x 10 k-1

using safety gap = change in length

Δ l = α I Δ Θ

1 x I0-5 x 3.0 x (41 – 29) = 3.6 x 10-3 m = 0.0036

Answer:

Explanation:

To find the acceleration of an object given it's initial and final velocity and time taken we use the formula

\(a = \frac{v - u}{t} \\ \)

where

v is the final velocity

u is the initial velocity

t is the time taken

a is the acceleration

From the question

v = 39 m/s

u = 27 m/s

t = 13 s

We have

\(a = \frac{39 - 27}{13} = \frac{12}{13} \\ = 0.923076... \: \: \: \)

We have the final answer as

Hope this helps you

One of the past car models that is being brought back as an electric vehicle is the Volkswagen Microbus. The original Volkswagen Microbus was an iconic vehicle in the 1960s and 1970s, and it is now being revived as an all-electric vehicle with modern features.

The new Volkswagen Microbus will be known as the ID. Buzz and will be released in 2022. The ID. Buzz is expected to have a range of around 300 miles on a single charge, and it will feature a spacious and comfortable interior with a modern design. The ID. Buzz will also have a host of advanced features, including semi-autonomous driving technology and a digital cockpit.

The revival of the Volkswagen Microbus as an electric vehicle is part of a larger trend in the automotive industry toward electrification. Many car manufacturers are now developing all-electric vehicles to reduce emissions and provide consumers with more eco-friendly transportation options.

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a. The equation for diffraction angle is θ = mλ/d , where m is the order of the diffraction, λ is the wavelength of the light, and d is the line spacing of the grating. Using these values, the angle of diffraction in the first order is θ = (1)(528 nm)/(3000 lines/cm) = 0.176°.

Wavelength is a measurement of the distance between successive crests of a wave. It is most commonly used to describe electromagnetic radiation, such as visible light, radio waves, and X-rays. Wavelengths range from thousands of kilometers for radio waves to fractions of a nanometer for X-rays. Wavelength is usually denoted by the Greek letter lambda (λ) and is expressed in meters. Wavelength is inversely proportional to frequency, meaning the more frequently a wave occurs, the shorter the wavelength.

b. Using the same equation as before, the angle of diffraction in the fifth order is θ = (5)(528 nm)/(3000 lines/cm) = 0.88°.

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Answer:

A is true

Explanation:

Other all are wrong I guess

Answer: The Answer is A

Explanation:

I'm not sure but

P = Momentum

P = Mass x Velocity

P = (M XV)^2

P^2

By examining the influence of surface area and material composition on thermal energy transfer in a controlled experiment, we can gain valuable insights into the fundamental factors that affect heat exchange. This knowledge can have practical applications in fields such as engineering, materials science, and energy efficiency.

A good question about the variables that affect thermal energy transfer in a controlled experiment could be: How does the surface area and material composition of an object influence the rate of thermal energy transfer?

By focusing on the surface area and material composition, we can investigate how these two variables affect the transfer of thermal energy. The surface area of an object determines the amount of area available for heat exchange, potentially affecting the rate of energy transfer. The material composition, on the other hand, can impact factors such as thermal conductivity, specific heat capacity, and emissivity, all of which play a role in how effectively heat is transferred.

To conduct the experiment, you can select objects of different materials and surface areas, such as metal plates or plastic blocks with varying dimensions. By exposing them to a controlled heat source and measuring the temperature change over time, you can analyze how the chosen variables affect thermal energy transfer.

This investigation would provide insights into the fundamental factors that influence heat exchange and can be used to inform practical applications in various fields such as engineering, materials science, and energy efficiency.

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Answer:

v =2.02

Explanation:

v^2=0.05-4.9

v^2=-4.85

square root both side

v=2.02

^^^^this is a not a perfect square  

The interval of time it takes for the team to do a work of 2.35×10⁷ J is 15000 seconds.

Time can be defined as an ongoing and continuous sequence of events that occur in succession, from past through the present, and to the future.

To calculate the time interval the work was done by the team on the wagon, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the interval of time it takes to the the work is 15000 seconds.

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A commentator will record and comment on group processes/dynamics, while a facilitator will evaluate the quality of group processes.

What is a facilitator?

A facilitator is someone who leads or guides a group of people in a discussion or problem-solving process.

A facilitator will evaluate the quality of group processes.

A facilitator has a responsibility to help the group reach their objectives in a productive and meaningful manner.

Facilitators have many tasks to perform.

They should assess the group and adapt to their needs.

They should also ensure that everyone in the group is heard and understood.

They should encourage everyone to participate in the process by providing a comfortable and safe environment for them to express their thoughts and ideas.

Facilitators should also manage conflict and redirect the conversation back to the agenda when necessary.

What is a commentator?

A commentator is a person who reports or comments on events.

In the context of group dynamics, a commentator will record and comment on group processes/dynamics.

The commentator is someone who is not actively involved in the process.

They can observe the group without being influenced by it.

They can provide valuable feedback and insight into how the group is functioning.

The commentator may provide feedback to the group or to the facilitator.

They may highlight areas where the group is struggling or where they are making progress.

They may also provide recommendations on how to improve the group dynamics.

The commentator's role is to provide an objective view of the group dynamics.

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The electromagnetic waves with an energy of \(1.5 \times 10^{-24} J\) are likely X-rays.

The energy of an electromagnetic wave is related to its frequency and wavelength by the equation:

E = hf = hc/λ

where:

E = energy of the electromagnetic wave

h = Planck's constant (\(6.626 \times 10^{-34} J s\))

f = frequency of the electromagnetic wave

c = speed of light (\(3.00 \times 10^8 m/s\))

λ = wavelength of the electromagnetic wave

Solving for λ:

λ = hc/E = \((6.626 \times 10^{-34} J s)(3.00 \times 10^8 m/s)/(1.5 \times 10^{-24} J)\)

λ ≈ \(4.40 \times 10^-8 m\)

This corresponds to a wavelength of about 44 nanometers, which falls in the range of X-rays. Therefore, the electromagnetic waves with an energy of \(1.5 \times 10^{-24} J\) are likely X-rays.

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Answer:

Frequency – The frequency of a wave is the number of waves that pass a given point in a certain amount of time. Frequency is measured in units called hertz (Hz), and is defined as the number of waves per second. A wave that occurs every second has a frequency of 1 wave per second (1/s) or 1 Hz.

The acceleration of the projectile is 600 m/s²

Acceleration is simply defined as the rate of change of velocity with time. Mathematically, it can be expressed as:

a = (v – u) / t

Where

•a is the acceleration

•v is the final velocity

•u is the initial velocity

•t is the time

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

•Time (t) = 0.5 s

•Initial velocity (u) = 0 m/s

•Final velocity (v) = 300 m/s

•Acceleration (a) =?

a = (v – u) / t

a = (300 – 0) / 0.5

a = 300 / 0.5

a = 600 m/s²

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Answer:

stuff

Explanation:

Answer:

constant acceleration,

Explanation:

when an object is moving without any change in direction,its acceleration is regarded as zero which also means that the object is moving at a constant acceleration.

If no forces are acting on a moving object, the object will continue to move with constant momentum.

To find the answer, we need to know about the force.

Thus, we can conclude that if no forces are acting on a moving object, the momentum is constant.

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Answer:

c

Explanation:

light refraction is a right angle

To calculate the value read by the voltmeter across R2, we need to use Ohm's Law, which states that voltage (V) is equal to the current (I) multiplied by the resistance (R).

Given the values provided, we have a voltage of 3 volts and a current of 0.25 amperes. The resistance across R2 is given as 2 ohms. Plugging these values into Ohm's Law, we can calculate the voltage across R2:

V = I * R
V2 = 0.25 A * 2 Ω
V2 = 0.5 volts

So, the value read by the voltmeter across R2 is 0.5 volts.

To calculate the value of R3, we can use Ohm's Law again. This time, we are given a voltage of 0.25 volts and a current of 0.5 amperes. Plugging these values into Ohm's Law, we can find the resistance of R3:

V = I * R
0.25 V = 0.5 A * R3
R3 = 0.25 V / 0.5 A
R3 = 0.5 ohms

So, the value of R3 is 0.5 ohms.

To calculate the total resistance, we need to consider the resistances in parallel (R1 and R2) and in series (R3 and R4).

The resistances R1 and R2 are in parallel, so we can use the formula:

1/Rt = 1/R1 + 1/R2
1/Rt = 1/4 Ω + 1/2 Ω
1/Rt = (2 + 4) / (4 * 2) Ω
1/Rt = 6 / 8 Ω
1/Rt = 0.75 Ω
Rt = 1 / 0.75 Ω
Rt = 1.333 Ω

The resistances R3 and R4 are in series, so we can simply add them:

Rt = R3 + R4
Rt = 0.5 Ω + 3 Ω
Rt = 3.5 Ω

Therefore, the total resistance is 3.5 ohms.

- The value read by the voltmeter across R2 is 0.5 volts.
- The value of R3 is 0.5 ohms.
- The total resistance is 3.5 ohms.

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Given:

Vector A = 63.5 m at 90 degrees

Vector B = 101 m at 57.0 degrees

Let's find the direction of the sum of these two vectors.

To find the direction, let's first find the x- and y-components of the vectors.

• Vector A:

• Vector B:

For the sum of components, we have:

x = Ax + Bx = 0 + 55 = 55 m

y = Ay + By = 63.5 + 84.7 = 148.2 m

Now, to find the direction of the sum, we have:

Plug in the values and solve for θ.

We have:

Therefore, the direction of the sum of the vectors is 69.6 degrees.

ANSWER:

69.6 degrees.

Explanation:

Find a force is F=mv^2/r, so F=50*5^2/5 = 250N