please help me out here

Answer:

C

Explanation:

Electromagnetic waves are produced by the vibration of charged particles.

The true statement of an electromagnetic wave is option c. The wave is caused by vibrating particles of matter.

It is the wave that should be developed that leads to the vibration that lies between the electric field and a magnetic field.

Here EM waves should be composed for oscillating magnetic and electric fields.

Hence, the option c is correct.

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Answer:

the final volume of the gas is 1.923 L.

Explanation:

Given;

initial pressure, P₁ = 8.4 atm

initial volume of the gas, V₁ = 1.9 L

final pressure of the gas, P₂ = 8.3 atm

The final volume of the gas is calculated by applying Boyle's law as follows;

P₁V₁ = P₂V₂

V₂ = P₁V₁ / P₂

V₂ = (8.4 x 1.9) / 8.3

V₂ = 1.923 L

Therefore, the final volume of the gas is 1.923 L.

Answer:

39

Explanation:

calculator

Answer:

39 is the answer. of your questions

The total thrust, expressed in pounds or tons, that the hydraulic-feed mechanism on a drill can impose on a drill string; also, the pressure of the fluid within the hydraulic cylinders, generally expressed in pounds per square inch. Ref: Long.

Hydraulic pressure is the force imparted per unit area of a liquid on the surfaces which it has contact. Liquids are incompressible, and as such, when a load acts

Answer:

Explanation:

C goes to 1

D goes to 3

B goes to 4

A goes to 2

Answer:

The sun generates energy from a process called nuclear fusion. During nuclear fusion, the high pressure and temperature in the sun's core cause nuclei to separate from their electrons. Hydrogen nuclei fuse to form one helium atom. During the fusion process, radiant energy is released. :D

Answer:

245 ml

Explanation:

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The original volume of the sample of hydrogen is 250 mL. The correct option is the fourth option 250mL

From the question,

We are to determine the original volume of the hydrogen.

To do this,

We will use the Boyle's law formula

Boyle's law states that "the volume of a fixed mass of gas is inversely proportional to its pressure, provided that the temperature remains constant."

From Boyle's law we have that

P₁V₁ = P₂V₂

Where P₁ is the initial pressure

V₁ in the initial volume

P₂ is the final pressure

and V₂ is the final volume

From the question,

P₁ = 1.5 atm

P₂ = 0.50 atm

V₂ = 750 mL

Put the above parameters into the Boyle's law equation

P₁V₁ = P₂V₂

Then, we get

1.5 × V₁ = 0.50 × 750

1.5 × V₁ = 375

∴ V₁ = 375 ÷ 1.5

V₁ = 250 mL

Hence, the original volume of the sample of hydrogen is 250 mL. The correct option is the fourth option 250mL

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Answer:11

Explanation:

Just did it

Answer: it’s 11

Explanation:

I just did the question

Answer:

22 m

Explanation:

Answer:

cliff height = 10.55 m

Explanation:

Remarks

Solution

Time

So the time taken is d = r * t  

Remember, this formula can only be used when there is no acceleration.

d = 22 meters

r = 15 m/s

t = ?

t = d / r

t = 22 / 15

t = 1.467

Height of the Cliff

vi = 0 (vertially)

a = 9.8 m/s^2

t = 1.467 seconds    The time horizontally and vertically is the same.

d = ?

Formula

d = vi*t + 1/2 a t^2

Solution

d = 0 + 1/2 * 9.8 * 1.467^2

d = 10.55 meters.

Answer:

Acceleration = -1.33ft/s²

Explanation:

Given the following data;

Initial velocity = 3.3ft/s

Final velocity = 3.3ft/s

Time, t = 4s

To find the acceleration;

In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.

This simply means that, acceleration is given by the subtraction of initial velocity from the final velocity all over time.

Mathematically, acceleration is given by the equation;

[tex]Acceleration (a) = \frac{final \; velocity - initial \; velocity}{time}[/tex]

Where,

Substituting into the equation, we have;

[tex]a = \frac{3.3 - 8.3}{4}[/tex]

[tex]a = \frac{-5.3}{4}[/tex]

Acceleration = -1.33ft/s²

The value is negative because the final velocity is lesser than the initial velocity i.e the student is decelerating.

Answer:

d

Explanation:

Answer:

D: wire

Explanation:

Answer:

Sharpening a knife reduces it's height as a wedge thus giving it more efficiency.

Explanation:

Mechanical advantage refers to the degree or quantity to which a force is increased or amplified by using a tool or a machine.

Mechanical Advantage can be calculated as follows:

Lenght of Incline (LI) / Height of Incline (HI)

Assume I have constructed a hedge with an inclination that run 10 meters from point x to point y (which is the back of a truck. Point y to the floor is 5 meters.

If   LI = 10m and

HI= 5m

The mechanical advantage is given as 10/5 = 2

The angle of incline is also called the effort distance. From our calculations above, by sacrificing horizontal movement, I reduced the amount of effort it would have cost to lift up that object from ground up -  a distance of 5 meters.

Think of a knife as a form of a similar wedge.

The more a knife is sharpening of a knife further reduces its angle of elevation. Thats why it becomes more efficient to use, hence our mechanical advantage.

Cheers

Answer:a

Explanation:because I know

Answer:

B & C

Explanation:

the first block will not move

Answer:

Reproduction

Explanation:

because reproduction produces variation within the species allowing the species to survive selection

Answer: D = reproduction

Explanation:

Answer:

Explanation:

The formula for kinetic energy  Ke=1/2mv^2 where Ke is kinetic energy, m=mass, and v= velocity.

If the kinetic energy is increased that means that there must be an increase in mass or velocity. However, since the velocity is squared that means that velocity affects the kinetic energy of the object more than the mass does.

Answer:

Sixty percent of all active volcanoes occur at the boundaries between tectonic plates. Most volcanoes are found along a belt, called the “Ring of Fire” that encircles the Pacific Ocean. Some volcanoes, like those that form the Hawaiian Islands, occur in the interior of plates at areas called “hot spots.”

Explanation:

Volcanoes are found around tectonic plates because the convection currents move the plates. Where convection currents diverge near the Earth's crust, plates move apart. Where convection currents converge, plates move towards each other, plates converge and the plates move together, also known as ridge push, therefore mountains and volcanoes are formed

Hope this helps :)

Answer:Atomic model keep changing because the electrons around the nucleus are not fixed and they keeps rotating or changing their position in valence orbits around the nucleus.

Explanation:

Answer:

soil

Explanation:

CORRECT

Answer:

soil

Explanation:

Hope this will help

Answer:

CALCIUM IDENINE ADEININE AND PHOSPHATE

Explanation:

Answer:

the answer is 12.0

The wavelength of the water wave is 0.75 meters.

Wavelength is the distance between successive peaks or troughs of a wave. It is denoted by the symbol λ (lambda) and is measured in meters (m) or other units of length.

The wavelength of a wave determines its properties such as its energy, frequency, and speed. In general, waves with longer wavelengths have lower frequencies and travel at slower speeds, while waves with shorter wavelengths have higher frequencies and travel at faster speeds.

Here in the Question,

The relationship between the wavelength (λ), frequency (f), and wave speed (v) of a wave is given by the equation:

v = λf

We are given the speed of the water wave (v) as 3.0 m/s and the frequency (f) as 4.0 Hz.

Plugging these values into the equation, we get:

3.0 m/s = λ x 4.0 Hz

Rearranging the equation to solve for the wavelength, we get:

λ = v/f = 3.0 m/s ÷ 4.0 Hz = 0.75 m

λ   = 0.75 m

Therefore, the wavelength of the water wave is 0.75 meters.

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Answer:

Answer:

.5(3120kg)(22.1m/s)^2 = 7.62x10^5 J

Explanation:

The work done on the truck to achieve given speed is [tex]7.62*10^{6}[/tex] Joules.

The work done on the truck is equivalent to the kinetic energy.

   Work done = Kinetic energy = [tex]\frac{1}{2} mv^{2}[/tex]

Where m is mass of truck and v is final velocity of truck.

Given that, [tex]m=3120Kg,v=22.1m/s[/tex]

Substitute values in above equation

                 [tex]Workdone=\frac{1}{2}*3120*(22.1)^{2} \\\\Workdone=0.5*3120*488.41=7.62*10^{6} KJ[/tex]

Thus,  The work done on the truck to achieve given speed is [tex]7.62*10^{6}[/tex] Joules.

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Answer:

I'm pretty sure it's half

Answer:

half

Explanation:

.................................

here's the first part but for the 2nd one all I know is that the word "compression" goes on the spirals that are closer together.

hope this helps!

Answer:

D

Explanation: this is why they have so much more energy released

During nuclear reactions, there is a loss in mass as some mass of the atoms involved is converted to energy.

Nuclear reactions are reactions which involves changes in the nucleus of of atoms of elements.

Nuclear reactions release a large amount of energy far greater than in chemical reactions.

Nuclear reactions are of two types:

During nuclear reactions, there is a loss in total mass of the particles as some of the mass is converted to energy.

Therefore, in nuclear reactions, some mass of the atoms involved us converted to energy.

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Answer:

Generally, when thermal energy is transferred to a material, the motion of its particles speeds up and its temperature increases. There are three methods of thermal energy transfer: conduction, convection, and radiation. ... Convection transfers thermal energy through the movement of fluids or gases in circulation cells.

Explanation:

Answer:

Why do you think transferring energy into or out of a substance can change the molecules’ freedom of movement?

Explanation:

We know that transferring energy can cause a change in molecules' freedom of movement. Another way to say this is that transferring energy into or out of a substance can cause a phase change.

Answer:

The mechanical advantage increases as the slope of the incline decreases. But the load will then have to be moved a greater distance. The ideal mechanical advantage (IMA) of an inclined plane is the length of the incline divided by the vertical rise, the so-called run-to-rise ratio.

Explanation:

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