Which of the following statements about waves are true? Select all that apply.
O
Sound waves cannot travel through empty space.
Sound waves can travel through liquids.
Light waves are not true waves.
Light waves need matter in order to travel.
Waves can only move matter up and down or from side to side.

Answers

Answer 1

Answer:

Sound waves cannot travel through empty space

sound can travel through liqui

Answer 2

Sound waves cannot travel through empty space but can travel through liquids. Waves make the particles of matter up and down but do not along with them. The light waves are not true mechanical waves. Therefore, options (A), (B), (C), and (E) are correct.

What are sound waves?

Sound can transmit through liquids, gases, and plasma as longitudinal waves, also known as compression waves. It needs a medium to propagate so it can be propagated through solids as both longitudinal waves and transverse waves.

Longitudinal sound waves contain alternating pressure deviations causing compression and rarefaction, while transverse waves have waves of alternating shear stress perpendicular to the direction of propagation.

Waves can make matter move up and down or from side to side but do not carry along with them. Light waves are not considered true waves because they carry without the involvement of the motion of matter.

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Related Questions

How can we make a simple energy flow diagram to show the heat transfer between animals, heat lamps and environment?

Answers

Answer:

Remember a few key things:

1.) Oil comes from plants, but also animals

2.) When heat lamps are done or useless, they go to landfills

3.) Things in landfills go back to the environment after a few years or even decades.

4.) Sometimes there are all-natural oils for heat lamps

A student measures the voltage and current between two points in an
electrical circuit. If the voltage is 120 V and the current is 0.5 A, what is the
resistance, according to Ohm's law?
A. 0.00402
Β. 240 Ω
C. 1200
D. 60.00

Answers

Answer:

B. 240Ω

Explanation:

The formula between voltage, current and resistance is:

voltage = current × resistance

So resistance = voltage ÷ current

Therefore resistance = 120 ÷ 0.5

Resistance = 240Ω

What is the ultimate fate of an isolated white dwarf?.

Answers

Answer:

It will cool down and become a cold black dwarf.

Explanation:

The electron degeneracy pressure slowly overwhelms gravity, and the white dwarf evaporates. As gravity overwhelms the electron degeneracy pressure, it will explode as a nova.

Helppppp
5) Experimental Design Cavendish's homemade apparatus gave him a calculated
value for the Gravitational Constant of 6.74E-11 Nm²/kg? The accepted value today
(with 200 years more advanced technology) is 6.67E-11 Nm²/kg? What sources of
error might Cavendish have had? How might scientists have improved this
experiment over the years.

Answers

Answer:

The apparatus would need to be extremely delicate because of the very small values being measured, the gravitational attraction of two massive objects.

(I) the torsion constant, measuring the deflection of massive objects would be very small and difficult to measure accurately

(II) since all surrounding objects are massive, it is difficult to remove the effect of such objects from forces being measured

(III) to consider a massive object as having all of its mass at its center, the massive object would need to be uniform throughout - any nonuniformity of the object would affect the calculations

(IV) all physical measurements would need to be made with utmost accuracy because of the relatively small distances involved with regard to the extremely small force being measured

(V) today laser measurements would assist in measuring small deflections accurately

At what distance does the electric field produced by a charge of -15 μc have a magnitude equal to 8. 7×104n/c?

Answers

Answer:

we'll use the electric field formula. ı wrote the formula in the photo.

Explanation:

The electric field formula is obtained by multiplying force and charge. When you apply this process I mentioned, you will find an electric field. then it is to write the given values and find the result. achievements.

At the distance for which the electric field produced by a charge of -15 μc have a magnitude equal to 8. 7×104n/c is 3.93 meters.

What is electric force?

Electric force is the force of attraction of repulsion between two bodies.

According to the Coulombs law, the force of attraction of repulsion between charged two bodies is directly proportional to the product of charges of them and inversely proportional to the square of distance between them.

It can be given as,

[tex]F=k\dfrac{Q}{r^2}[/tex]

Here, (k) is the coulombs constant,  (Q) is the charges and (r) is the distance between the two charges.

The charge of -15 μc have a magnitude equal to 8. 7×104n/c. Put this value in the above formula,

[tex]8.7\times10^4=(8.98\times10^{9})\dfrac{15\times10^{-6}}{r^2}\\r=3.93\rm\; m[/tex]

Thus, at the distance for which the electric field produced by a charge of -15 μc have a magnitude equal to 8. 7×104n/c is 3.93 meters.

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Differentiate between transverse wave and longitudinal wave​

Answers

Explanation:

Transverse wave

The wave in which the particles of the medium vibrate up and down perpendicularly to the direction of the wave is called transverse wave...It consists of crests and troughs...It can be produced only in solids and surface of liquids...

Longitudinal wave

The wave in which the particles of the medium vibrate to-and-fro in the direction of the wave is called longitudinal wave..It consists of compressions and refractions...It can be produced in solid , liquid and gas...

How do we use information from earths climate change data in order to engineer soulutions that reduce carbon emissions and impact of human activities?

Answers

Answer:

That is a very broad question. One thing that does not seem to be considered is the depletion of the ozone layer at high altitudes.

In the 1960's chlorofluorcarbons (CFC,s) became popular as refrigerants, spray can propellants, etc.  In January 1989 the Montreal Protocol was passed which has greatly reduced the use of these substances. However, it may be several decades before the ozone layer can be replaced and again absorb harmful ulraviolet rays that may be partly responsible for the increase in global warming.  

(One chlorine atom at high altitudes can be responsible for the destruction of 100,000 molecules of ozone - catalytic reaction)


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[tex] \text{What is ideal-gas equation?}[/tex]

Answers

Answer:

PV = nRT

Explanation:

The Ideal Gas Equation shows the relation between 4 factors :-

Pressure Volume moles Temperature

⇒ R is the molar gas constant included so they are equal to each other, without it, they would just be proportional

The equation :-

⇒ PV = nRT

A drum is struck, producing a wave with a wavelength of 110 cm and a speed of
2.42 × 104 m/s. What is the frequency of the wave? What is the period?

Answers

Explanation:

wavelength = l

speed of wave = v

frequency = f

v = lf → f = v/l = 2.42 × 10⁴ ÷ 1.1 = 2.2 × 10⁴ 1/s

T = 1/f = 1/ 2.2 × 10⁴ = 0.45 × 10 -⁴ s

The frequency of the sound wave produced from the drum is the speed divided by the wavelength. The frequency of the wave 22 kHz.

What is frequency ?

Frequency of a wave is the number of wave cycles per unit time. Frequency of a wave is directly proportional to the energy and inversely proportional to the wavelength.

The relation between speed of the wave c, wavelength and frequency of the wave can be written as follows:

c = νλ.

Given speed of the sound wave produced from the drum = 2.42 × 10⁴ m/s

wavelength λ = 110 cm = 1.1 m

The frequency of the sound wave  = speed/wavelength

ν = 2.42 × 10⁴ m/s / 1.1 m = 22000 Hz or 22 kHz.

Time period = 1/frequency

T = 1/ 22000 = 4.45× 10⁻⁵ seconds.

Therefore, the frequency of the wave is 22 kHz and time period of  4.45× 10⁻⁵ seconds.

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Two people are having a race pushing equal sized boxes up a hill. joe pushes the box up the hill in 10 seconds and cindy pushes the box up the hill in 5 seconds. who is applying more pressure on the side of the box?

Answers

The person applying a greater pressure to the box is Cindy since it takes her a lesser  time to move the box up the hill.

What is pressure?

The term pressure is defined as the force per unit area. WWe know that the magnitude of force applied is shown by the time taken to push the box up the hill.

Since Cindy pushes the box up the hill in only five seconds, it means that Cindy is applying a greater pressure to the box.

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Explain why electromagnetic forces are essential to forming compounds.

Answers

Explanation:

formation of compounds because the electric forces compel the atoms to attract each other and formed bonds which leads to the formation of chemical compounds. The attractive or repulsive interaction between any two charged bodies is known as an electric force so the attraction between two opposite charged atoms causes the formation of compounds so we can conclude that electric forces are important for the formation of compounds.

Which concept is exemplified by being able to distinguish a slight change in light when a dimmer is used to adjust the brightness

Answers

Answer:

The just-noticeable concept.

Explanation:

Pls help with physics.
Question: How does kicking a soccer ball relate to newton's third law?
Thank you!

Answers

Answer:

Explanation: “Every action has an equal opposite reaction” is Newton’s third law. So in this situation, kicking the soccer ball is the action and the reaction is it rolling.

Answer:

you push against the ball and the ball pushes back at you

Your force->|<- ball's force

Explanation:

For every action, there is an equal and opposite reaction

yeah help me with this one too i have no clue

Answers

Answer:

C. Stimulus = temperature, response = sweat

Explanation:

So basically, stimulus means cause and response means effect.

So, the cause in this case is temperature, while the response to the temperature is sweating.

Why did astronomers suspect an eighth planet beyond uranus? how did they determine where to look for it? construct the correct explanation.
drag the terms on the left to the appropriate blanks on the right to complete the sentences.

brightness - mass - orbit - position - kepler's third law - value - law of gravity


observation of uranus showed small but significant discrepancy between its predicted ______ and its actual ________ , which could mean that another object perturbed its motion.
in the mid-1800s, astronomers used the ________ to predict where a planet would have to be.

Answers

Astronomers suspected an eighth planet beyond Uranus because of the irregularities in the motion of Uranus suggested that gravity from another planet was affecting it.

Who is an astronaut?

It should be noted that an astronaut simply means an individual who is trained to travel in spacecrafts.

In this case, astronomers suspected an eighth planet beyond Uranus because of the irregularities in the motion of Uranus suggested that gravity from another planet was affecting it.

In mid-1800s, astronomers used the orbits of most asteroids to predict where a planet would have to be.

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Martha wants to calculate an object's velocity. What will she need to do?​

Answers

Answer:

you divide the distance by the time it takes to travel that same distance, then you add your direction to it.

state ohm's law and prove V=ir​

Answers

Answer:

Ohm’s law states that the current flowing through a conductor is directly proportional to the potential difference ( Voltage ) between the terminals of the conductor, provided that, factors such as the temperature of the conductor is kept constant

V = IR, where R is the proportionality constant.

R = resistance (measured in ohms)

V = voltage (measured in volts)

I = current (measured in amps)

1. manganese dioxide is used in dey cell . ( Give reason)
2. Fuses are used in a circuit. ( Give reason )​

Answers

Answer:

1.In dry cells, manganese dioxide acts as a ‘depolariser'.

In the depolarization process, the depolariser is used to remove hydrogen and doesn't allow the voltage to get reduced due to polarisation of the cell . Manganese oxide was used as a depolariser in Leclanché cell .

In zinc-carbon dry cell, the manganese dioxide takes in electrons as it is converted to Manganese III oxide (Mn2O3)

2.The fuse breaks the circuit if a fault in an appliance causes too much current flow. This protects the wiring and the appliance if something goes wrong. The fuse contains a piece of wire that melts easily. If the current going through the fuse is too great, the wire heats up until it melts and breaks the circuit.

what happens when you put foil in the microwave?

Answers

Answer:

The foil makes the microwave spark it can smoke up and catch fie.

Explanation:

-The aluminum foil's sharp edges are what causes the fire, smoke, and sarks.

- Hope This Helps!

-Justin:)

Answer:

itll spark and catch fire

Explanation:


Matthew drops a cherry pit out the car window 1.0m above the ground while traveling down the road at 18m/s.
a) How far, horizontally, from the initial dropping point, will the pit hit the ground
b) Draw a picture of the situation.
c) If the car continues to travel at the same speed, where will the car be in
relation to the pit when it lands?

Answers

Answer:

ADD ALL THEM AND ANSER WILL BE THERE 19.O

Explanatio

3 Select the correct answer.
Which of the following statements is TRUE? А. Children in the US are generally given the opportunity to play sports in school starting at a young age.
B. The US is one of the few countries to integrate sports into their school systems.
C. Most high schools and colleges in the US have various sport teams.
D. All of the above​

Answers

Answer:

A,B,C

Explanation:

because that is true

The physical meaning of 220 volts​

Answers

Answer:

a particular level of electical potential from a power source

Different Betweens in Current Source And Voltage Source.
[tex] \\ \\ \\ \\ \\ \\ \\ [/tex]
Thanks:')​

Answers

Answer:

Voltage and current sources are two different sorts of sources that may be found in an electrical network. A voltage source has an emf forcing function, whereas a current source has a current forcing function.

☆ ------ ☆ ------ ☆ ------ ☆ ------ ☆

A wave oscillates 4.0 times a second and has a wavelength of 3.0 m.
What are the (a) frequency, (b) period, and (c) speed of this wave?

Answers

a) The frequency of the wave is 4.0 Hz

b) The period T of the wave is 0.25s

c) The speed of the wave is 12m/s

Given the data in the question;

Number of oscillation per seconds = 4.0Wavelength; [tex]\lambda = 3.0m[/tex]Frequency; [tex]f = \ ?[/tex]Period; [tex]T = \ ?[/tex]Speed of the wave; [tex]v = \ ?[/tex]

Frequency, Period and speed.

Frequency is simply the number of occurrences of a repeating phenomenon per unit time.

Period is the time needed for a complete cycle of vibration to pass a given point.

It is expressed as;

[tex]T = \frac{1}{f}[/tex]

Where f is the frequency

Speed is simply the distance traveled in a given interval of time or time ratio.

It is expressed as;

[tex]v = \lambda * f[/tex]

Where [tex]\lambda[/tex] is wavelength and f is frequency

a) Frequency

We said frequency is the number of occurrences of a repeating phenomenon per unit time.

Since the wave oscillates 4.0 times a second

Hence, the frequency of the wave is 4.0 Hz

b) Period

[tex]Period\ T = \frac{1}{f} \\\\Period\ T = \frac{1}{4.0Hz}\\\\Period\ T = \frac{1}{4.0s^{-1}}\\\\Period\ T = 0.25s[/tex]

Therefore, the period T of the wave is 0.25s

c) Speed

[tex]v = \lambda * f\\\\v = 3.0m * 4.0Hz\\\\v = 3.0m * 4.0s^{-1}\\\\v = 12ms^{-1}\\\\v = 12m/s[/tex]

Therefore the speed of the wave is 12m/s.

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What are the conditions necessary for a terrestrial planet to have a strong magnetic field?.

Answers

Both a molten metallic core and reasonably fast rotation.

What current is required in the windings of a long solenoid that has 1580 turns uniformly distributed over a length of 0.44 m in order to produce a magnetic field of magnitude 0.000394 T at the center of the solenoid

Answers

The current required in the windings of the given long solenoid that has 1580 turns uniformly distributed over the length of the solenoid is 1.98 A.

Magnetic field at the center of a solenoid

The magnetic field at the center of a solenoid is given by the following formula,

B = μ₀nI

where;

μ₀ is permeability of free space n is number of turnsI is current in the solenoidCurrent in the solenoid

I = B/μ₀n

I = (0.00394) / (4π x 10⁻⁷ x 1580)

I = 1.98 A

Thus, the current required in the windings of the given long solenoid is 1.98 A.

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Use F = 1/T as your basis:
7. What is the period of 60.0Hz electrical power?

The answer is 16.7 ms but please show your work.

Answers

Frequency=60Hz

[tex]\\ \rm\rightarrowtail \nu=\dfrac{1}{T}[/tex]

[tex]\\ \rm\rightarrowtail T=\dfrac{1}{\nu}[/tex]

[tex]\\ \rm\rightarrowtail T=\dfrac{1}{60}[/tex]

[tex]\\ \rm\rightarrowtail T=1.67\times 10^{-4}s[/tex]

[tex]\\ \rm\rightarrowtail T=16.7\times 10^{-3}s[/tex]

[tex]\\ \rm\rightarrowtail T=16.7ms[/tex]

5)A 0.50 kg hockey puck is at rest on ice when you hit it with a hockey stick, applying a force of 100 N for
0.10 seconds. The puck then slides across the ice, where the coefficient of kinetic friction is 0.20. After
sliding for 4 seconds, the puck collides with a 0.80 kg box of donuts. The puck immediately comes to rest
after the collision. How far will the box of donuts slide before coming to rest if the coefficient of friction
between the box and the ice is 0.30.

Answers

Answer:

F t = m Δv         impulse delivered = change in momentum

Δv = 100 * .1 / .5 = 20 m/s     original speed of puck

KE = 1/2 m v^2 = .5 * 20^2 / 2 = 100 J     initial KE of puck

E = μ m g d        energy lost by puck

Ff = μ m g = m a      deceleration of puck due to friction

a = μ  g = 9.8 * .2 = 1.96 m/s^2

v2 = a t + v1 = -1.96 * 4 + 20 = 12.2 m/s     speed of puck on striking box

m v2 = M V       conservation of momentum when puck strikes box

V = m v2 / M = 12.2 * .5 / .8 = 7.63 m/s     speed of box after collision

KE = 1/2 M V^2 = .8 * 7.63^2 / 2 = 23.3 J     KE of box after collision

KE = μ M g d     energy lost by box in sliding distance d

d = 23.3 / (.3 * .8 * 9.8) = 9.91 m     distance box slides

A 120 N accelerates an object 1. 2 m/s? What is the mass of the object?

Answers

Answer:

m = 100 kg

Explanation:

F = ma

120 = m × 1.2

m = 120 ÷ 1.2

m = 100 kg

Is the following sentence true or false? When two surfaces rub, the irreg-ularities of one surface get caught on those of the other surface.

Answers

This is in fact true!
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List 3 of your favorite ways to praise a child. What parts of China are most densely populated An engineer would like to design a parking garage in the most cost-effective manner. He reads that the average height of pickup trucks, which is the largest type of vehicle that should be expected to fit into the parking garage, is 76.4 inches. To double-check this figure, the engineer employs a statistician. The statistician selects a random sample of 100 trucks and finds the mean height of the sample to be 77.1 inches with a standard deviation of 5.2 inches. The statistician will determine if these data provide convincing evidence that the true mean height of all trucks is greater than 76.4 inches. What are the appropriate hypotheses?H0: = 76.4 versus Ha: < 76.4, where = the true mean height of all trucksH0: = 76.4 versus Ha: > 76.4, where = the true mean height of all trucksH0: = 76.4 versus Ha: < 77.1, where = the true mean height of all trucksH0: = 76.4 versus Ha: > 77.1, where = the true mean height of all trucks Imagine you have visited a school with some of its facilities underground. Write a recount of your visit. is x 4 a factor of P(x) = x^4 - 4x^2 4x + 8 ? Explain. I am so stressed! I barely have a minute to relax all day long. Before school, I go to swim practice, and after school, I work on the school newspaper and have piano lessons. On Saturday mornings, I volunteer at the local hospital. Then the rest of the weekend, I try to catch up on the schoolwork that I didnt have time for all week. I never see my friends, and I always eat on the run. Im starting to have headaches and stomachaches. What should I do?1. Identity (figure out) what you think is causing the persons stress. 2. How is the situation affecting the student's body? 3. Provide one or two ways for reducing their stress. guys quick press alt+f4 5. What device would an elderly person most likely have trouble hearing? (Assume each sound has the same decibel level)O A. a car hornO B. a smoke alarmO C. a tubaO D. a foghorn Trina purchases 10 tickets from a charity raffle. Each ticket in the raffle has 6 different numbers between the numbers 1 and 20. If there is only one prize, what is the probability of Trina winning the prize? Express your solution as a fraction in reduced form. A system of equations is shown Y=2x-5 Y=4x + 3What is the solution to the system of equations?A (-4,-13)B(-4,3)C (4,-13)D (4,3) Explain how you could find the distance between points (3,6) and (7,6) on the coordinate plane PLEASE help me. Please. Which debates among historians over the effects of the Vietnam War did you discover in your research? 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At the end of the session, the mean distance traveled for the new type of golf ball was found to the significantly greater than the mean distance for the original-style golf ball.Which of the following is a valid conclusion?Inferences can be made about all the golf balls produced on that day, and the conclusion can be made that the new type of golf balls travel farther than the original type of golf ball for this golf pro.Inferences can be made about all the golf balls produced on that day; however, a conclusion cannot be made that the new type of golf balls travel farther than the original type of golf ball for this golf pro.Inferences cannot be made about all the golf balls produced on that day; and a conclusion cannot be made that the new type of golf balls travel farther than the original type of golf ball for this golf pro.Inferences cannot be made about all the golf balls produced on that day; however, the conclusion can be made that the new type of golf balls travel farther than the original type of golf ball for this golf pro. A patient comes to the doctors office complaining of gas. Which active ingredients is the physician most likely to recommend for the patient complaints? Tina buys 5 pounds of potatoes for $4. 35 and 3 pounds of carrots for $3. 57 how much does 1 pound of potatoes cost In addition to or in place of a front signature, many photographers sign and date the back of a photograph. True False A pool supply company sells 50-pound buckets of chlorine tablets. A customer believes that the company may be underfilling the buckets. To investigate, an inspector is hired. The inspector randomly selects 30 of these buckets of chlorine tablets and weighs the contents of each bucket. The sample mean is 49.4 pounds with a standard deviation of 1.2 pounds. The inspector would like to know if this provides convincing evidence that the true mean weight of the chlorine tablets in the 50-pound buckets is less than 50 pounds, so he plans to test the hypotheses H0: = 50 versus Ha: < 50, where = the true mean weight of all 50-pound buckets of chlorine tablets. The conditions for inference are met. The test statistic is t = 2.74 and the P-value is between 0.005 and 0.01. What conclusion should be made at the significance level, Alpha?Reject H0. There is convincing evidence that the true mean weight of the chlorine tablets in the 50-pound buckets is less than 50 pounds.Reject H0. There is not convincing evidence that the true mean weight of the chlorine tablets in the 50-pound buckets is less than 50 pounds.Fail to reject H0. There is convincing evidence that the true mean weight of the chlorine tablets in the 50-pound buckets is less than 50 pounds.Fail to reject H0. 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