Which happens when sound waves enter a vacuum?
A. They are reflected.
B. They move slower
C. They move faster
D. They stop moving
Answers
Related Questions
Complete these sentences to identify the types of interference. The type of interference that increases the energy of the resulting wave is called interference. The type of interference that results in a loss of energy is called interference.
Answers
Answer:
the result is an increase in energy, this is the so-called CONSTRUCTIVE INTERFERENCE.
resulting energy is zero, this is the so-called DESTRUCTIVE INTERFERENCE
Explanation:
When we have an interference process the optical paths of the two rays are added, when the incident rays arrive in phase the result is an increase in energy, this is the so-called CONSTRUCTIVE INTERFERENCE.
When the rays arrive out of phase a half wavelength the resulting energy is zero, this is the so-called DESTRUCTIVE INTERFERENCE
Answer:
its constructive and destructive
Explanation:
i got it right
Which describes Einstein’s second postulate about the special theory of relativity? The speed of light in a vacuum is constant, and nothing is faster than the speed of light. The speed of light in a vacuum is constant, and some things are faster than the speed of light. The speed of light in a vacuum fluctuates, but nothing is faster than the speed of light. The speed of light in a vacuum fluctuates, and some things are faster than the speed of light.
Answers
Answer:A
Explanation:
Answer: A)The speed of light in a vacuum is constant, and nothing is faster than the speed of light.
Explanation:
Answered Correctly on Edg.
Good Nicky and Evil Nicky do 800 J of work to move shelly's tank 5 meters across the floor. How much force did you use? if it took 6 seconds to slide the box what was the power used?
Answers
Answer:
The force used is 160 N, and the power used is 133 W.
Explanation:
Because the formula for force is Work/Distance, the answer in that case would be 800J/5m, and that would give you an answer of 160 N. For Power, the formula is Work/Time, and for that the expression would be 800/6, and that would give you 133 W as the power used.
M= 1000 g g= 10 m/s2 h= 10 K.E at GROUND = 400 j M.E = ....... ........J the answer is 400 so plz explain how
Answers
Answer:
M = 500 J
Explanation:
Given that,
Mass, M = 1000 g = 1 kg
Height, h = 10 m
Potential energy is given by :
P = mgh
P = 1×10×10
P = 100 J
The kinetic energy at ground = 400 J
Mechanical energy = sum of kinetic and potential energy
So,
M = 100 + 400
M = 500 J
So, the mechanical energy of the system is 500 J.
Which diagram below shows the earth moon sun system arranged to cause a total solar eclipse
Answers
Answer:
its D
Explanation:
It is time when the moon completely covers the sun. So, the diagram that shows the earth moon and sun system arranged to cause a full solar eclipse is in option D.
What is a solar eclipse?A solar eclipse happens when the Moon moves in front of the Sun, blocking the Sun's light entirely or partially from a tiny portion of the Earth.
During the new moon phase of the eclipse season, when the Moon's circular plane is close to the Earth's orbital plane, such an alignment takes place around every six months.
A total eclipse occurs when the Moon completely blocks out the Sun's disk. Only a portion of the Moon is covered by annular and partial eclipses.
In contrast to a total eclipse, which can be seen from any place on Earth's night side, a partial eclipse is only viewable from a fairly tiny portion of the globe.
Therefore, it concludes that option D in the figure shows the cause of the total solar eclipse.
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what is the meaning of the word antonyms
Answers
Answer:
a word opposite in meaning to another ( bad and good ).
Explanation:
a word which has opposite in meaning to another word
2. A mixture of mercury and copper is an example of
a) solid and solid
b) liquid and solid
c) solid and liquid
d) liquid and liquid
Answers
Answer:
b
Explanation:
liquid and solid
hope that helps :)
b
Explanation:
option b would be the answer
The electric field 1.22 m from
charge is 1570 N/C, pointing
toward the charge. What is the
charge? Include the sign of the
charge, + or -
(The answer is *10^-7 C. Just fill
in the number, not the power.)
(Unit = C)
Answers
Answer:
-2.6
Explanation:
it’s for Acellus
The charge with magnitude and sign is -2.6 x 10⁻⁷ C.
What is electric field?The field developed when a charge is moved. In this field, a charge experiences an electrostatic force of attraction or repulsion depending on the nature of charge.
Given, the electric field 1.22 m from charge is 1570 N/C, pointing
toward the charge.
The electric field and charge is related as
E = kq/r²
q = Er²/k
where k = 9 x 10⁹ N.m²/C²
Substitute the given values in the question, we have
q = 1570 x (1.22)² / 9 x 10⁹
q= 2.6 x 10⁻⁷ C.
Thus, the magnitude and sign of charge is -2.6 x 10⁻⁷ C.
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Plssss help———what is the difference between the weight of an object and the mass of an object? (Needs to be 4-5 complete sentences)
Answers
The mass of an object is a measure of the object's inertial property, or the amount of matter it contains. The weight of an object is a measure of the force exerted on the object by gravity, or the force needed to support it. The pull of gravity on the earth gives an object a downward acceleration of about 9.8 m/s2.
Which change is an example of transforming potential energy to kinetic energy?
changing thermal energy to electrical energy
changing mechanical energy to chemical energy
changing nuclear energy to radiant energy
changing radiant energy to electrical energy
Answers
Answer:
changing nuclear energy to radiant energy
Changing nuclear energy to radiant energy is an example of transforming potential energy into kinetic energy.
What is kinetic energy?Kinetic energy is a type of motion energy (i.e., energy in movement), which is used to perform work.
Conversely, potential energy is a type of energy stored in an object, which can be converted to kinetic energy.Nuclear energy is a type of potential energy because this energy is stored in the atomic nucleus.In conclusion, changing nuclear energy to radiant energy is an example of transforming potential energy into kinetic energy.
Learn more about kinetic energy here:
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The two forces are trying to make the cyclist slow down. They are _________ and _________ .
Answers
Answer:
Friction and gravity?
Explanation:
i dont know the possible answers but that's how physics so good luck.
A person has a gravitational force (weight) of 600 N on Earth. Suppose the mass of the Earth is double and the radius shrinks to 1/3 of what it currently is. Calculate your new weight.
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Explanation:
that's impossible,the radius of the earth can't decrease when the mass doubles!
How long did it take the shuttle shock to fall 12 meters
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Calculate the frequency of an electromagnetic wave having a wavelength of 60 m.
Help Please
Answers
Answer:
50000
Explanation:
f= speed of light (c) which is a constant number 3×10^6 divided by wavelength
f = 3×10^6/ 60
f = 50000
1. Which of the following is NOT true about momentum?
a. It has direction
b. It is conserved in a system
c. It depends on mass and velocity
d. It is the same as the energy of a body
2. Which of the following is TRUE about the impulse acting on a body and it's change in momentum?
a. Impulse is equal to the change in momentum
b. Impulse is greater than the change in momentum
c. Impulse is less than the change in momentum
d. There is no relation between impulse and change in momentum
Answers
Answer:
1. answer - it is conserved in a system
2. answe- impulse is equal to the change in momentum
Question 2: What is the velocity ratio of this pulley?
Load
distance=12 m
Effort
distance= 4 m
Answers
Answer:
1/3
Explanation:
Velocity ratio = distance moved by effort / distance moved by load
Which statement correctly describes these electric field lines
Answers
Answer:
ok
Explanation:
the correct answer is C please follow me
Which would increase the speed of a sound wave?
Answers
Answer:
I would say temperature
A football player kicked a ball at an angle of 37o above the horizontal with an initial velocity of 20 m/s, what is the maximum height reached by the ball? a. 62 m b. 26 m c. 7.4 m d. 5.1 m
Answers
Answer:
H = 8.45 m
Explanation:
Given that,
Angle of projection, [tex]\theta=37^{\circ}[/tex]
The initial velocity of the ball, u = 20 m/s
We need to find the maximum height reached by the ball. The formula for the maximum height is given by :
[tex]H=\dfrac{u^2\sin^2\theta}{2g}\\\\H=\dfrac{(20)^2\times \sin^2(37)}{2\times 9.8}\\\\H=8.45\ m[/tex]
So, the maximum height reached by the ball is 8.45 m.
Which court case provided for Judicial Review?
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Answer:
The best-known power of the Supreme Court is judicial review, or the ability of the Court to declare a Legislative or Executive act in violation of the Constitution, is not found within the text of the Constitution itself. The Court established this doctrine in the case of Marbury v. Madison (1803).
The Biot-Savart force law predicts the force on a charge moving ____ to a magnetic field.
a.perpendicular
b.parallel
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What is a key difference between transverse and longitudinal waves?
A.) Transverse move up and down while longitudinal can do in any direction.
B.) Transverse can e described as troughs and crest while, longitudinal waves can be described as compression and rarefactions.
C.) There is no difference, it depends on the scientific uses and calculations involved.
D.) Transverse waves can only represent sound while longitudinal are represented by ocean waves, light and other waves
Answers
Answer:
B.) Transverse can e described as troughs and crest while, longitudinal waves can be described as compression and rarefactions.
The longer the handle the __________ the mechanical advantage and the greater the increase in force that is applied to the bolt. Less
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Answer:
Greater
Explanation:
The longer the handle the greater the mechanical advantage and the greater the increase in force that is applied to the bolt.
Mechanical advantage can be said to be the rate at which a particular force is multiplied.
This then means that there is a comparison between the output force and that of the input force.
The longer the handle gets, the more the mechanical advantage of the bolt and this also translates to it requiring lesser force being applied on it..
A car traveled a distance of 30 km in 20 minutes (1/3 hours). What was the
speed of the car?
O A. 90 km/hr
O B. 60 km/hr
O c. 30 km/hr
O D. 10 km/hr
Answers
20 minuets is 1/3 of an hour so you multiply 30 km by 3 and get 90 km/hr
What acceleration can a 1-newton force give to a 1-kilogram object?
Answers
Answer: 1 m/s/s
Explanation: One Newton is defined as the amount of force required to give a 1-kg mass an acceleration of 1 m/s/s.
A circuit contains a 20-Ohm resistor and an inductor with an inductance of 0.093 H. If the circuit has a frequency of 60 Hz, what is the total impedance of the circuit?
Answers
Answer:
Explanation:
The computation of the total impedance of the circuit is shown below:
The Total impedance of the circuit is
=
where
X_L^2 = 2πfL
= (2π) (60Hz) (0.093 H)
= 35.06 Omega
Now put the value of X_L^2 in the above formula
=
objects through which light can pass are referred to as dash objects
Answers
Answer:
Those objects are called transparent objects...
Explanation:
If only some light can pass through them ,it is called translucent....
If no light can pass through them ,it is called opaque.
Answer:
hii good morning
hey i am not good player but i wanted to give a triel to play duo in ff
if a 0.040-kg stone is whirled horizontally on the end of a 60-m string at a speed of 4.4 m/s, what is the centripetal force ? * 0.013 n 4 n 0. 32 n 20.1 n
Answers
Answer:
0.013N
Explanation:
[tex]F=\frac{mv^{2} }{r}[/tex]
m=0.04, v=4.4m/s, r=60
F=0.013 N
If a ball has 100 J of potential energy on the shelf, how much energy does it have if it falls one-fourth of
the way down to the ground?
Answers
Answer:
75 J
Explanation:
After collapsing from the shelf. The ball falls one fourth of the distance down. If we calculate 100 - 1/4 ×100= 75 J.
An Aluminium stick of length 1.5 m is cooled from 200 C to -1800 C. Find the final length if its coefficient of linear expansion is 23×10-6/K?
Answers
Answer:
1.454 m
Explanation:
From the question,
L₂ = L₁+α(T₂-T₁).................. Equation 1
Where L₂ = Final Length, L₁ = Initial Length, α = Coefficient of Linear expansion, T₁ = Initial Temperature, T₂ = final Temperature.
Given: L₁ = 1.5 m, α = 23×10⁻⁶ K⁻¹, T₁ = 200 °C, T₂ = -1800 °C
Substitute these values into equation 1
L₂ = 1.5+[23×10⁻⁶ ×( -1800-200)
L₂ = 1.5+(23×10⁻⁶×2000)
L₂ = 1.5+(-0.046)
L₂ = 1.5-0.046
L₂= 1.454 m.
