A light wave has a frequency of 12 Hz. Calculate it’s wavelength.

To Build your paper cup telephone system do the following:

Two cups, some inelastic string, thread, or fishing line, two paper clips, and a pencil or sewing needle are needed to make a paper cup phone.

Use a pencil or sewing needle to make a hole in the bottom of each cup, then thread a string through each hole to make a paper cup phone.

To keep the thread from coming away from the cups, secure each end with a paper clip. One person should speak into one cup, and you should listen through the other.

Pull the string taut. With the cups, you can talk to someone up to 100 feet away.

A string phone functions quite similarly to a landline. Talking into the cup causes the bottom to vibrate as sound waves are transmitted within the cup by your voice.

The other cup's bottom receives the vibrations that are transmitted to the string, across it, and into it. The second cup vibrates as a result of the sound waves transmitting your voice's audio.

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Answer:

7500m/s

Explanation:

according to the equation:

v = λf

you simply must multiply the frequency of the wave and its wavelength to get the speed so,

(75m)(100hz) = v
*hz is equivalent to 1/s, so multiply m and hz would make m/s)
v = 7500m/s

Answer:

Bacteria

Fungi

Viruses

Parasites

Answer:

D

No matter what time of year it is, shadows will remain the same.

Explanation:

Answer:

A

Explanation:

Late in the year the sun the earth is tilted away from the sun that means the sunlight is not coming in as directly. So, shadows during are longer.

The impact site in Arizona is called the Barringer Crater. Numerous students have gone to visit this amazing site and it is definitely worth putting on your bucket list.

The Barringer Crater, also known as Meteor Crater, is a famous impact crater located near Winslow, Arizona. It was formed approximately 50,000 years ago when a meteorite collided with Earth's surface, creating a crater about 1.2 kilometers (0.75 miles) in diameter and 170 meters (560 feet) deep. The impact energy was estimated to be equivalent to about 10 megatons of TNT.

The Barringer Crater is one of the best-preserved impact craters on Earth, and it attracts numerous visitors each year due to its impressive size and geological significance. Its well-preserved state provides valuable insights into the processes and effects of meteorite impacts.

If you're fascinated by natural wonders and geological phenomena, visiting the Barringer Crater should definitely be on your bucket list. It offers a unique opportunity to witness the aftermath of a meteorite impact and learn more about the Earth's history. Make sure to plan a trip to Arizona to experience this amazing site firsthand.

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The advantage that the Hubble Space Telescope has over ground-based telescopes is A. There is no blurring due to the atmosphere.

This is because the Hubble is located above Earth's atmosphere and is not affected by atmospheric distortions that can blur images captured by ground-based telescopes. Additionally, option B is also correct as the weightlessness of the telescope allows for a larger mirror to be used, which enhances its capabilities. However, option C and D are incorrect as the Hubble's proximity to celestial objects and being always in darkness are not advantages but rather inherent characteristics of its location in space.

Because the Hubble Space Telescope does not possess the biggest mirror ever constructed, option B is incorrect. Although its primary mirror's diameter of 2.4 meters (7.9 feet) was deemed enormous at the time of its launch, later ground-based telescopes have been constructed with larger mirrors.

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Answer:

A and A

Explanation:

see paper for work! :)

The given information is:Luis rushes 40 m towards his truck. He notices he forgot his shoes and returns back to his house. His total travel time is 60 s.Let's determine Luis' average velocity and average speed.Average velocity of LuisAverage velocity of Luis is determined by the displacement and time taken to travel the distance.

We can say that the average velocity of Luis is 0 m/s because Luis comes back to the house.Average speed of LuisWe can determine the average speed of Luis by taking into account only the magnitude of the distance covered irrespective of the direction.Luis has covered a total distance of 80 m. Luis traveled 40 m towards his truck and returned 40 m towards his house.

Average speed = Total distance / Total timeAverage speed = 80 m / 60 sAverage speed = 1.33 m/sTherefore, the average velocity of Luis over the 60 s period is 0 m/s and the average speed of Luis over the 60 s period is 1.33 m/s.

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Answer:

open the dictionary/glossary. it will give you the definitions of the words there.

Explanation:

Answer:

i think it goes like this

Explanation:

The moment of inertia of a bicycle wheel that is rotated about an axis parallel to its axle is greater than its moment of inertia about its axle.

The moment of inertia of an object is a quantity that represents how difficult it is to change the object's rotational motion about a given axis.

The moment of inertia is determined by the mass of the object and how the mass is distributed around the axis of rotation.

The moment of inertia is greater when the mass is farther away from the axis of rotation.

When a bicycle wheel is rotated about an axis through its rim and parallel to its axle, its moment of inertia is greater than when it is rotated about its axle.The mass is distributed uniformly about the wheel, with the majority of the mass located near the rim.

Because the mass is located farther away from the axis of rotation when the wheel is rotated about an axis through its rim, the moment of inertia is greater.

Summary: Thus, the moment of inertia of a bicycle wheel that is rotated about an axis parallel to its axle is greater than its moment of inertia about its axle.

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Answer:

don t know

Explanation:

The momentum of the van after the collision will be -9600 kg m/s.

Momentum is a concept in physics that is used to describe an object's resistance to changes in motion. It is based on the principle of inertia, which states that an object will remain in a state of rest or constant motion unless acted upon by an outside force. Momentum is calculated by multiplying the mass of an object by its velocity. Momentum is a vector quantity, meaning that it has both magnitude and direction. Momentum is also conserved, meaning that the total momentum of any closed system remains constant.

Momentum is a measure of an object's mass multiplied by its velocity. Before the collision, the momentum of the van was 9600 kg m/s (80kg x 72m/s). After the collision, both vehicles will be travelling in the opposite direction, meaning that the momentum of the van will be the same as before, but in the opposite direction. Therefore, the momentum of the van after the collision will be -9600 kg m/s. The change in momentum, or delta momentum, of the van after the collision is the difference between the before and after momentum, or 9600 kg m/s.

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Answer:

0.66

Explanation:

Follow the Density Formul d = m/v

so

d = 5.29/8

= 0.66 Density

Just correct me if I'm wrong, I mean like literally :> Thank you! ^^

Answer: Distance: 27m Displacement: 7m

Explanation: Distance is total, Displacement is from the start.

Hope this helped!

Mark Brainliest if you feel like it!

Action-reaction pairs are forces that operate on separate objects in opposing directions and at identical magnitudes. Never do they affect the same thing. We learn that forces are interactions from Newton's third law.

When two bodies contact, they exert an equal and opposite force on one another in accordance with Newton's third rule of motion. Action-reaction forces are made up of these forces.

Think about how a baseball bat and a ball interact, for instance. The bat forces the ball to the right while the baseball forces the bat to the left. The action-reaction force pair is made up of these two forces acting on two separate objects together.

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Answer:

ok

Explanation:

Answer:

The change of movement depends on the force that acts and the length of time it acts.

magnetic field of a solenoid is B  = 8.33*10^-4 T

Moreover, Length of the solenoid L  = 2.6 m

Number of turns  N  = 690

current in the magnetic field  is  i  = 2.5 A

magnetic field of a solenoid is B  = μ 0 N * i / L

                                                         = 4π*10^-7 * 690 * 2.5A / 2.6

                                                         = 8.33*10^-4 T

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The difference between sublimation and condensation is that

Sublimation is used to in a separation technique to separate sublime substance from a mixture while condensation is the

is the process where water vapor becomes liquid

This technique is used in chemistry to separate two or more constituents from a mixture

In conclusion, sublimation differs from condensation because sublimation is used to in a separation technique to separate sublime substance from a mixture while condensation is the

is the process where water vapor becomes liquid

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epidermal layer is made of basal cell layer that are consulting dividing

The earth is made up of three main layers: the core, the mantle, and the crust. The thickness of the earth's layers varies, with the thickest layer being the mantle and the thinnest layer being the crust.

The crust is divided into two main layers: the continental crust and the oceanic crust. The thickness of the earth's crust varies depending on where you are on the planet.

For example, the continental crust is thicker than the oceanic crust because it is made up of denser materials.

The thickest part of the earth is the mantle. The mantle is approximately 2,890 kilometers (1,796 miles) thick. It is composed of silicate rock and is divided into two parts: the upper mantle and the lower mantle.

The lithosphere is the solid outermost layer of the earth. It is composed of the crust and the uppermost part of the mantle. The thickness of the lithosphere varies depending on where you are on the planet.

For example, the lithosphere is thicker under continents than it is under oceans. The thickness of the lithosphere ranges from 70 to 250 kilometers (43 to 155 miles). The pedosphere is the outermost layer of the earth's crust that is capable of supporting plant life. It is composed of soil and other organic matter.

The thickness of the pedosphere varies depending on the type of soil and the location. In general, the pedosphere is between 10 and 50 centimeters (4 and 20 inches) thick.

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The acceleration of the car toward the cliff is 19.81m/s. Other part as well as the explanation of the question is discussed below.

To find the speed at which the car leaves the cliff, first we need to know how long it took to reach the ground. We do this with the equation Where the vertical position at a time , since we are looking for the moment when the car reaches the gound is the initial vertical position, in this case the height of the cliff  is gravitational acceleration: .

So replacing the known values and since we need the time, we clear for it At time  the car  reaches the ground, according to the problem at a horizontal distance from the base of the cliff of 100 to find the velocity we use where  is the horizontal distance at time  (in this case  and  ),  is the initial horizontal distance, we define the cliff as zero in horizontal distance so , and  is the velocity of the car when it rolled of the cliff.

Therefore, The initial velocity (when it rolled of the cliff) is 19.81m/s.

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169 Kcalories are provided by a portion of food that has 25 grams of carbs, 6 grams of protein, and 5 grams of fat.

Kcalories mean kilo-calories. Basically, kilo-calorie or kcal refers to 1,000 calories. To get the Kcalories of food, you have to add the kcal of carbohydrates, protein, and fat.

Get the product by multiplying the number of grams of carbohydrate, protein, and fat by 4,4, and 9, respectively. So if you want to get the energy or Kcal available from a meal, you must then combine the outcomes.

Simply put it, take note of the following conversions:

So here's how to compute the Kcalories of food that contains 25g carbs, 6g protein, and 5g fat.

1.    25g x 4kcal/g = 100kcal

2.    6g x 4kcal/g = 24kcal

3.    5g x 9kcal/g = 45kcal

4.    100kcal + 24kcal + 45kcal = 169kcal!


Therefore, the food contains 169 kilo-calories!

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A piano string of density 0.005 0 kg/m is under a tension of 1350 N, then the velocity with which a wave travels on the string would be 519.61 m/s

It is a particular variety of mechanical waves made up of the disruption brought on by the movements of the energy. In an elastic medium like the air, a sound wave travels through compression and rarefaction.

As given in the problem a piano string of density 0.005 0 kg/m is under a tension of 1350 N,

V= √F/μ

V=√(1350/0.005)

V =  519.61 m/s

Thus, the velocity with which a wave travels on the string comes out to be  519.61 m/s

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(a) Built-in potential Vbi: ≈ 0.71 V  ; (b) Depletion width Wdep: ≈ 3.75 x 10⁻⁵ m  ; (c) Xn: ≈ 3.40 x 10⁻⁵ m and  and Xp ≈ 3.37 x 10⁻⁶ m ; (d) The maximum electric field : ≈ 1.89 x 10⁴ V/m.

Given data: Na = 5 x 10¹⁵  cm-3 and Nd = 5 x 10¹⁶ cm³.N; = 1.5 x 10¹⁰ cm. € = 11.7. VR = 4 V.

(a) Built-in potential Vbi: As we know, the built-in potential Vbi for a p-n junction is given as follows:

\(Vbi = (kT/q) ln(Na Nd / n²)\)

Vbi = (0.0259 V) ln [(5 x 10¹⁵ ) (5 x 10¹⁶) / (1.5 x 10¹⁰ )²]

≈ 0.71 V.

(b) Depletion width Wdep:

The depletion width Wdep for a p-n junction is given as follows:

\(Wdep = [2 ε N; (Vbi - VR)] / [q (Na + Nd)]\)

Wdep = [2 (11.7) (8.85 x 10⁻¹⁴) (0.71 - 4)] / [(1.6 x 10⁻¹⁹) (5 x 10¹⁵  + 5 x 10¹⁶)]

≈ 3.75 x 10⁻⁵ m.

(c) Xn and Xp: The position of the depletion region is given by the following expressions:

\(Xn = Wdep (Nd / Na + Nd)\)

Xn = (3.75 x 10⁻⁵) (5 x 10¹⁶ / (5 x 10¹⁵ + 5 x 10¹⁶))

≈ 3.40 x 10⁻⁵ m.

\(Xp = Wdep (Na / Na + Nd)\)

Xp = (3.75 x 10⁻⁵) (5 x 10¹⁵ / (5 x 10¹⁵ + 5 x 10¹⁶))

≈ 3.37 x 10⁻⁶ m.

(d) The maximum electric field

Emax: The maximum electric field Emax is given by the following formula:

\(Emax = Vbi / Wdep\)

Emax = (0.71) / (3.75 x 10⁻⁵)

≈ 1.89 x 10⁴ V/m.

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To determine the coefficient α' for silver based on a reference temperature T₀ of 0°C, we need to know the values of rho₀' and α' for silver. Unfortunately, these values are not provided in the given information.

The coefficient α' for silver based on a reference temperature T₀ of 0°C can be determined using the given expression rho = rho₀' [1 + α'T].

We need to find α' for silver.

From the given information, we know that the temperature coefficient of resistivity α is based on a reference temperature T₀ of 20.0°C.

To find α', we need to use the relation between α and α'.

We can express α in terms of α' using the equation: α = α'/(1 + α'T₀).

Substituting the given values, we have: α = α'/(1 + α'T₀) = α'/(1 + α' * 20.0).

Now, we need to find the value of α'.

Let's substitute the expression for α' in the equation: α'/(1 + α' * 20.0) = rho₀' [1 + α'T₀].

Simplifying the equation further, we get: α' = (rho₀' [1 + α'T₀]) / (1 + α' * 20.0).

By substituting the appropriate values for rho₀' and α', we can solve this equation to find the coefficient α' for silver.

Please note that the values of rho₀' and α' for silver are not provided in the question.

To find the coefficient α', we need these values.

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Answer: work done = 64,000J or 64KJ.

Explanation:

Work is said to be done if a force applied makes the object to move through a distance in the direction of the applied force. Work is the product of force and perpendicular distance in the direction of the applied force. It is represented by W, measured in Joules(J) and a scalar quantity.

Thus, work done(J)= force(N) × distance(m)

From the the question,

applied force= 1600N

distance=40m

Therefore, work= 1600 × 40

W= 64,000J

But, 1 kilojoules = 1000J

Therefore, 64,000J = 64,000 ÷ 1000

= 64KJ

Work done is 64KJ

Answer:

Convection

Explanation:

a) The leaves of the electroscope separate when the perspex rod is brought close to the metal disc on top of the electroscope without touching it because the metal disk's electrons are attracted to the perspex and migrate away from the leaves.

This is due to the fact that the perspex rod was negatively charged by rubbing it with wool, which transferred some electrons from the wool to the perspex rod. As a result, some of the metal disk's electrons are pushed away in the direction of the electroscope's leaves since it is a conductor and encounters the repelling force of the negatively charged perspex rod. Because of this, the leaves have a negative charge, and because they all have a negative charge, they repel one another, resulting in the electroscope needle to deflect.

When the metal disk is touched with the wool cloth after charging the electroscope with the rubber rod, any excess charge on the electroscope is neutralized and the electroscope returns to its neutral state.

b) No, the wool cloth does not have the same charge as the acrylic rod. When the acrylic rod is rubbed with the wool cloth, some electrons are transferred from the wool to the rod, giving it a negative charge, while the wool loses some electrons and acquires a positive charge. Therefore, the wool cloth and the acrylic rod have opposite charges.

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Answer:

Explanation:

I'm assuming you missed the decimal point in the initial velocity and that it should be 4.0 m/s. If after a half of a second it is moving a tiny bit slower, it would be because of air resistance. You can only neglect air resistance if the problems you are doing tell you neglect it.

Answer:

Air resistance

Explanation:

I got it correct on the quiz :)