what is the speed of a wave has a wavelength of 0.5 m/s and a frequency of 2 hz?
Answer: The equation that relates wavelength and frequency for electromagnetic waves is: λν=c where λ is the wavelength, ν is the frequency and c is the speed of light.
10/0.5=20 meter.
Explanation:
The speed of a wave has a wavelength of 0.5 m/s and a frequency of 2 hz is 0.25 m.
What is wave ?Wave is is a disturbance in a medium that carries energy as well as momentum . wave is characterized by amplitude, wavelength and phase. Amplitude is the greatest distance that the particles are vibrating. especially a sound or radio wave, moves up and down. Amplitude is a measure of loudness of a sound wave. More amplitude means more loud is the sound wave.
Wavelength is the distance between two points on the wave which are in same phase. Phase is the position of a wave at a point at time t on a waveform.
There are two types of the wave longitudinal wave and transverse wave.
Longitudinal wave : in which, vibration of the medium (particle) is parallel to propagation of the wave. Sound wave is a longitudinal wave.
Transverse wave : in which, vibration of the medium (particle) is perpendicular to propagation of the wave. Light wave is a Transverse wave.
The relation between velocity, frequency and wavelength is,
c = λν
Where λ is wavelength, ν is frequency and c is velocity.
Given,
c = 0.5 m/s
ν = 2 hz
λ = ?
Putting all the values in the equation,
0.5 = 2λ
λ = 0.5/2 = 0.25 m
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A website is having a sale, and all items are 25% off the original price, p
Which expressions can be used to find the price of an item after the discount?
Select all that apply
Α.
0.75
B
1.25
CP_25
DP - 0.25
E 001P x 75
The force between two objects is 60. N. One object has a positive charge of 1.2 x 10-6 C, while the other has a negative charge of -1.2 x 10-6 C. How far apart are the two objects in cm? (1.5 cm)
The distance between the two objects is 1.5 cm.
To calculate the distance between the two objects, we use the formula obtained from Columb's law
What is Columb's law?Columb's law states that the force of attraction or repulsion between two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.
Formula:
F = kqQ/r²............... Equation 1Where:
F = Force between the two objectsr = Distance between the objectsQ and q = charges on both objects respectively.k = Columb's constantMake r the subject of the equation
r = √(kqQ/F).............. Equation 2From the question,
Given:
F = 60 Nq = 1.2×10⁻⁶ CQ = 1.2×10⁻⁶ Ck = 8.99×10⁹Substitute these values into equation 2
r = √[(1.2×10⁻⁶×1.2×10⁻⁶×8.99×10⁹)/60]r = √[(12.9456×10⁻³)/60]r = √(2.16×10⁻⁴)r = 1.47×10⁻² mr = 1.47 cmr ≈ 1.5 cm.Hence, The distance between the two objects is 1.5 cm.
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what is the name of Li1S
Please help!
Which resources are renewable resources?
Select all correct answers.
1. natural gas
2. solar
3. coal
4. hydroelectric
5. biomass
Answer: The answers are Biomass, Solar, and Hydroelectric! :)
Explanation:
Four objects are being tested to see how they are affected by fluid friction. Object W has a surface area of 4. 5 cm2, Object X has a surface area of 2. 5 cm2, Object Y has a surface area of 6. 2 cm2, and Object Z has a surface area of 3 cm2. Which object would experience the most fluid friction? W X Y Z.
Answer: the most affected object by friction is the Y
Explanation:
The fluid friction consists of 2 parts.
viscous resistance and friction with air.
assuming that the objects are in contact with the air, the situation is described by the following equation.
with: C= numerical drag coefficient
p= density
A= Area of the object
v= velocity
so assuming the other variables are constants the area of the object is directly proportional to the fluid friction
Caleb does the following:
i. walks 4 m, south
ii. walks 8 m, east
iii. walks 4 m, north
iv. walks 8 m, west.
Her overall displacement is .....?
2. A 60-nc point charge is located at the center of a 'pi cube of side length m What is the electric flux through each of the faces of the cube?
Answer:
Bağışlayın, bəzi problemlərim olduğu üçün bunu edirəm.
How is an image created by an X-ray machine? A. High-energy electromagnetic waves are either absorbed by or reflected by body tissue. B. Low-energy electromagnetic waves are either reflected by or transmitted through body tissue. C. Low-energy electromagnetic waves are either absorbed by or transmitted through body tissue. D. High-energy electromagnetic waves are either absorbed by or transmitted through body tissue.
Answer: C Low energy electromagnetic waves are either reflecting by or transmitted through body tissue.
Explanation:
What would a wave with a low amplitude sound like? Question 3 options: It would sound quiet. It would sound loud. It would sound squeaky. It would sound deep
Answer:
it would be loud
Explanation:
it would be loud
A transformer has 200.0 turns in its secondary coil and 120.0 turns in its primary coils. The primary coil is connected to a 80.00 V power supply. If 3.50 A flows in the primary coil, then how much current is there in the secondary coil
No.of primary turns/no.of secondary equal to current in primary /current in secondary therefore 200/120=3.50/C.in secondary =2.1A
What is the kinetic energy of a 1.000 g bullet traveling at 1,000 m/s?
Answer: B
Explanation:
The conventional units for Joules is defined with kilograms. We are given the mass of the bullet in grams. Using the conversion factor of 1kg = 1000g, we get that:
[tex]1g*\frac{1kg}{1000g} =1*10^-^3kg[/tex]
Kinetic energy is defined to be:
[tex]KE=\frac{1}{2} mv^2[/tex]
[tex]KE=\frac{1}{2} (10^-^3kg)(1000m/s)^2[/tex]
[tex]KE=500J=5*10^2J[/tex]
Why does an iron nail sinks in water but a wooder cork floats on water?
Answer:
Because nail is made of metal
If Felix jumped from an even greater distance, do you think the force on him would be different? If so, how?
Help, This is my last question
Answer:
it would be the same because they are equal
Which of the following is not true about potential energy?
Select one:
a.
b.
C.
d.
Potential energy is stored energy.
Potential energy is related to position.
Potential energy is a scalar quantity.
Potential energy has direction.
Answer:
[tex]\huge\boxed{\sf Option \ D.}[/tex]
Explanation:
Potential Energy:
Energy stored due to the position of any object is usually known as the potential energy of the object.Type of Quantity:
Potential energy is a scalar quantity which means it is only defined by its magnitude and has no direction.Unit:
The unit of potential energy is joules.Types:
Gravitational potential energyElastic potential energyElectric potential energyNuclear potential energy[tex]\rule[225]{225}{2}[/tex]
how would the heating curve for glass be different from the heating curve for water
Answer:
The heating curve for glass would be different from the heating curve for water because water has a strange behavior while glass also has a strange behavior but is different because it lacks the repeating crystalline structure of solids like ice, or water. Glass becomes soft and impressionable as temperature increases.
Since glass lacks the repetitive crystalline structure present in solids like ice or water, its strange behavior differs from that of glass when heated. This is because glass has a unique, strange behavior than water. As temperature rises, glass becomes brittle and impressionable.
What is Heat?A difference in temperature causes energy to flow from one body to another, recognized as heat. Energy is transferred, or heat flows, when two substances of different temperatures are brought together. The hotter body goes to the cold.
Typically, though not always, this energy transfer causes the temperature of the region of lower temperature to rise and the temperature of the warmer object to fall. It is possible for a substance to absorb heat without increasing its temperature by migrating from one physical state (or phase) to another, such as melting, sublimation, boiling, or shifting from one solid form to the other.
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Why do you think there are differences on how far two vehicles should be from each other depending on what types of vehicle they are? How does this promote road safety?
Answer:
to reduce the pace of accident
4 "Find shelter in a building or a metal-topped vehicle (not a convertible), and close the windows. " Based on this safety tip, what can you conclude about the safety of cars during lightning? A All cars, regardless of type, will protect you from lightning B B Cars are less safe than buildings during lightning. The rubber tires of a car protect you from lightning. D a The metal roof of a car protects you from lightning.
Answer :- Option D
Explanation:-
Coz electric field inside a conductor is zero that's why we don't get electrocuted.
Hope it helps....
please help me with this, This is very important for me
Answer:
(a) parallel circuit
(b) (i) ammeter (ii) current
Hope this helps!
How can scientists best confirm and validate the results of an experiment so they can publish their findings?
by removing the control from the experiment
by adding more variables to the experiment
by decreasing the number of trials
by creating a replicable experiment
I think by adding more variables to the experiment.
What would happen if everyone on earth screamed at the same time?.
Answer:
There would be a huge sound like an applause. At 200 decibels (the loudest possible sound ever created on Earth), it could shatter ear drums.
Explanation:
Hope this helps
If everyone on the planet screamed at the same moment, it would be a tremendously loud and chaotic event.
The particular impacts and repercussions, however, would be dependent on a variety of parameters such as the strength of the screams, the length, and the location of persons.
The cumulative cries of billions of individuals would produce a deafening loudness, perhaps reaching levels far beyond what the human ear can handle.
Thus, those in close proximity to people yelling may experience discomfort, confusion, and even bodily pain as a result of the loudness.
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Define propagation of sound
Considering the definition of speed and propagation of sound, sound is a sequence of waves of pressure which propagates through compressible media and depends on the characteristics of the medium in which the propagation occurs.
Definition of speed and propagation of soundSound is a vibration that propagates as an acoustic wave, through a transmission medium such as a gas, liquid or solid.
That is, sound is a longitudinal wave, mechanical (does not travel in a vacuum) and propagates in all directions, so that the wave front is spherical.
Propagation of sound involves energy transport without matter transport, in the form of mechanical waves.
The speed of propagation of a sound wave depends on the characteristics of the medium in which the propagation occurs and not on the characteristics of the wave or the force that generates it. The speed of propagation of sound waves is also known as the speed of sound.
SummaryIn summary, sound is a sequence of waves of pressure which propagates through compressible media and depends on the characteristics of the medium in which the propagation occurs.
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A steel wire 0.72 m long has a mass of 5 x 10⁻³ kg. If the wire is under a tension of 60N, what is the speed of the transverse waves on the wire?
Answer:
93m/s
Explanation:
Solution,
Here,
Length(l)=0.72m
Mass(m)=5x 10⁻³
T=60N
As we have
v=√T/μ
And
μ=m/l
μ=5 x 10⁻³ /0.72
Now
v=√60×0.72/5 x 10⁻³
v=√8640
v=92.95m/s=93m/s
Why do we need to convert mass to moles in stoichiometry problems.
Felix made a chart listing the uses for two types of mirrors. A 2 column by 2 row table. Column 1 is titled X and contains the following entries: Used as side view mirrors on cars, Used to help people see traffic around blind corners. Column 2 is titled Y and contains the following entries: Used in dental instruments, Used in telescopes to produce enlarged images Which headings belong in the chart? X: Plane Y: Convex X: Concave Y: Plane X: Convex Y: Concave X: Convex Y: Plane.
Answer:
X: convex Y: Concave
Explanation:
Just got it right
A lightweight plastic rod has a mass of 2.0 kg attached to one end and a mass of 2.5 kg attached to the other end. The rod has a length of 1.20 m. How far from the 2.0-kg mass should a string be attached to balance the rod
The distance from the 2.0 kg mass at which a string should be attached to balance the rod is 0.67 m.
Distance can be defined as the horizontal length between two points.
To calculate the distance at which the string must be attached to balance the rod, we use the formula below.
Formula:
m₁gx = m₂g(1.2-x)................. Equation 1From the question,
Given
m₁ = 2.0 kg m₂ = 2.5 kgx = Distance of the string from the 2.0 kg massg = Acceleration due to gravity.= 9.8 m/s²Substitute these values into equation 1
2(9.8)(x) = 2.5(9.8)(1.2-x)Solve for x
19.6x = 29.4-24.5xCollect like terms
19.6x+24.5x = 29.444.1x = 29.4x = 29.4/44.1x = 0.67 mHence, the distance from the 2.0 kg mass at which a string should be attached to balance the rod is 0.67 m.
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i need help with this
If you hold a heavy weight over your head, the work you do __________. Is less than zero is greater than zero is converted into chemical energy Is zero. Is converted into potential energy
If you hold a heavy weight over your head, the work you do is Is converted into potential energy.
What is Work done?Work is said to be done when the applied force displaces an object over a given distance.
Work - energy theoremWork energy theorem states that, the work done on object is equal to change in mechanical energy of the object.
When an object is raised over a given distance the work done is equal to the potential energy of the object given as;
W = P.E = mgh
Thus, If you hold a heavy weight over your head, the work you do is Is converted into potential energy.
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Write a poem about how Earth's rotation causes day and night. Be sure to use
these terms: rotate, axis, sun, move, and Earth. use 16 lines
Answer:
Always on the move
Nothing stays the same
The sun comes and goes
The night you can never escape
Nothing can last for ever
Everything we know rotates
I thought this would be more clever
But it's late and I don't know what else to say
Those were eight lines only
Counting lines makes you lonely
Sixteen is a big number
I feel like I'm going under
It's always daytime somewhere
But it will never be forever
I move in circles
This poem is over
Explanation:
Sorry I thought it would end up better than this
Find the kinetic energy of a body of mass 2 kg moving with a speed of 10 ms^-1 .
Question :-
Find the Kinetic Energy of a body of Mass 2 kg moving with a Speed of [tex] \bf{10 \: {ms}^{ - 1} } [/tex] .Answer :-
Kinetic Energy is 100 Joule .Explanation :-
As per the provided information in the given question, we have been given that the Mass of the body is 2 kg . Speed of the body is given [tex] \bf{10 \: {ms}^{ - 1} } [/tex] . And, we have been asked to calculate the Kinetic Energy .
For calculating the Kinetic Energy , we will use the Formula :-
[tex] \bigstar \: \: \boxed{ \sf{ \: Kinetic \: Energy \: = \: \dfrac{1}{2} \: \times \: {mv}^{2} \: }} \\ [/tex]
Where ,
M denotes to the MassV denotes to the SpeedTherefore , by Substituting the given values in the above Formula :-
[tex] \longmapsto \: \: \sf{ Kinetic \: Energy \: = \: \dfrac{1}{2} \: \times \: {m \: \times \: v}^{2} } \\ [/tex]
[tex] \longmapsto \: \: \sf{Kinetic \: Energy \: = \: \dfrac{1}{2} \: \times \: 2 \: \times \: {10}^{2} } \\ [/tex]
[tex] \longmapsto \: \: \sf{Kinetic \: Energy \: = \: \dfrac{1}{2} \: \times \: 2 \: \times \: 100 } \\ [/tex]
[tex] \longmapsto \: \: \sf{Kinetic \: Energy \: = \: \dfrac{1 \: \times \: 2 \: \times \: 100}{2}} \\ [/tex]
[tex] \longmapsto \: \: {\textbf {\textsf {Kinetic \: Energy \: = \: 100 \: Joule }}} [/tex]
[tex] \underline {\rule {180pt} {4pt}} [/tex]
The kinetic energy of the body with the given value of mass travelling at the given speed is 100 Joules.
What is Kinetic Energy?Kinetic energy is simply a form of energy a particle or object possesses due to its motion.
It is expressed as;
K = (1/2)mv²
Where m is mass of the object and v is its velocity.
Given the data in the question;
Mass of the body m = 2kgVelocity v = 10ms⁻¹Kinetic energy of the train K = ?We substitute our given values into the above expression to determine the kinetic energy of the body.
K = (1/2)mv²
K = (1/2) × 2kg × (10ms⁻¹)²
K = 0.5 × 2kg × 100m²s⁻¹
K = 100kgm²s⁻¹
K = 100J
Therefore, the kinetic energy of the body with the given value of mass travelling at the given speed is 100 Joules.
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