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
Riley measured the distance her friend Blakely ran on a straight track every 2 seconds. What was Blakely's average speed? What was her acceleration?
Answers
Answer:
Average speed = 25m/s
Acceleration = 12.5m/s^2
Explanation
Let the distance covered by Riley be 50m
Average speed = Distance/Time
Average speed = 50/2
Average speed = 25m/s
Acceleration = Speed/time
Acceleration = 25/2
Acceleration = 12.5m/s^2
Note that the value of the distance was assumed
Sort by LUSTER. Is there a relationship between color and luster? How are they similar or different?
Answers
Color is..blue, red, black... basically COLORS. Whereas luster is like a soft glow or gentle sheen kinda like something is shining. You could say the luster of the blue paint is beautiful.
Explanation:
Bowchiclawowowow
The pressure was 50pa ,when a perpendicular force was applied on a surface area of 2.5m2.what is the force applied??????
Answers
Answer:
Force = 125 Newton
Explanation:
Given the following data;
Pressure = 50 pa
Area = 2.5 m²
To find the force applied;
Force = pressure * area
Substituting into the formula, we have;
Force = 50 * 2.5
Force = 125 Newton
Calculate the tangential speed of a yo-yo twirled at the end of a 4 meter long string at 2 revolutions per second.
Answers
Answer: 50 m/s
Explanation: speed v = 2· pi·n·r = 2· 3.14· 2 s^-1· 4 m
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.
What is the acceleration of a car that goes from Om/s to 60m/s in 6 seconds?
Answers
10m/s !!!!!!!!!!!!!!!!!!!!!!!
Could a tsunami cause the canary islands volcano to erupt or could the canary islands volcano eruption cause a tsunami? Why?
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in desert the day are very hot and night are very cold ,why?
Answers
Answer:
Sand doesn't hold heat well. The sun heats up the ground during the day and when night comes along, the sand loses all it's heat
10. What are the only types of passes allowed in floor hockey?
Answers
a bomb is dropped from a plane fying at a constant horizontal velocity at an altitude of 300m. where is the bomb after 2 seconds?
Answers
Answer:
it will be almost on the ground
Explanation:
i say this because the boom is heavy and its going down fast so it will not be in the air or on the floor it will be akmost o the ground.
Jenny and Anne wanted to see who could throw a ball the hardest. They decided to each throw a ball against a wall as hard as they could and measure how far the ball rolled away from the wall
Answers
Answer:
The answer is below
Explanation:
Jenny and anne wanted to see who could throw the ball the hardest. they decided to each throw a ball against the wall as hard as they could and measured how far the ball rolled away from the wall. what might be the variables in this experiment;
Solution:
There are different type of collisions. In an inelastic collision, momentum is conserved and there is loss in kinetic energy while in an elastic collision, momentum is not conserved and there is no loss in kinetic energy.
During inelastic collision, the objects stick together while during an elastic collision, the objects separate.
When the ball is thrown against the stationary wall, there is momentum due to the force of impact. The distance at which the ball is rolled away from the wall depends on:
a) mass of the ball, b) velocity of the ball, c) mass of the wall d) type of collision (elastic or inelastic)
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
why are the effects of collision different if the forces on the object is the same
Answers
Answer:
When two objects collide, a force is exerted on each object. The two forces are in opposite directions but the same strength. Even though the force on each object in a collision is the same strength, the objects will have different velocity changes if their masses are different.
Explanation:
*sighs* can u please give me brainliest-..... I'm literally crying....lol but PLEASE BRAINLIEST PLEASEEEE T_T
36. What are the necessary condition for work to done
A). Force must be applied on a body
B). The applied force causes the body to displace
C). The force and the displacement must be parallel or in the same direction
D). All of the above
-
YO
Answers
Answer:
A
Explanation:
Anything can be doing work at any time. Even when your sleeping work is being done so no part of the body needs to displace before work can be done.
Two runners ran side by side, each holding one end of a horizontal pole. How would this affect the direction of the runners? Explain.
Answers
Answer:
They will run parallel to each other as the none of a straight pole cannot be bent in such a way where one side can turn without the other turning.
Speed of a car is 30 m/s. Find its speed in km/h.
110 km/h
5.3 km/h
108 km/h
109 km/h
Answers
Answer:
108km/h
Explanation:
1km=1000m
3600s=1 hr
M/s= 3600/1000km/hr= 3.6km/hr
30m/s= 30×3.6km/hr = 108km/hr
A man walks a distance of 2 m every second.
aj What speed is he travelling at?
b) How far wil he have walked in:
5 s
50 s
2 min
2 hr
Please help :(.
Answers
5s = 10m
50s = 100m
2 min = 240m
2 hr = 14,400m
If a car is traveling 35 m/s for 200 seconds, how far will the car travel?
Answers
Answer:
7.14285714286
Explanation:
7,000 meters (m)
explanation:
formula is d=v•t
d is distance, v is velocity (speed), and t is time.
to find the answer to this problem, plug in the values given:
d = 200 • 35
7000 = d
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
The release of energy by the nucleus of an atom as a result of nuclear fission is radiant energy
True or false
Answers
Nuclear Energy
Energy released by nuclear fission or fusion.
So I think the answer is true.
If you are sitting 8.20 m from a
70.0 W speaker, what is the
sound level in dB?
(Treat the speaker as a point source.)
(Unit = dB)
Answers
The sound level will be 109 decibels. If a person exceed hear a sound more than the certain sound level, the person hearing may damage.
What is sound level?Sound level is the intensity to measure the sound. Decibels are used to quantify sound level.
Sound level or the sound intensity is the ratio of the power to the surface area;
[tex]\rm Intensity = \frac{Pow\pi er }{Surface \ area} \\\\ \rm Intensity = \frac{70}{ 4 \times \pi \times 8 \times 20^{2} } \\\\ I = \ 0.082 \ W/m^2[/tex]
The conversion of the obtained value into the decibel as;
[tex]\rm I = 10 \times log \frac{I}{1 \TIMES 10^{-12}} \\\\\ I = 109 \ decibel[/tex]
Hence, the sound level will be 109 decibels.
To learn more about the sound level, refer to the link;
https://brainly.com/question/12899113
#SPJ2
CAN SOMEONE PLEASE DO THIS FOR ME. ILL GIVE YOU BRAINLIEST!!!! I NEED A STORY. (If you answer the question and it's not a real answer I'll report you)
Phases of Matter Activity
Now it is your turn to show what you know about phases of matter and thermal energy transfer! Your task is to create a presentation to explain the transformation of a substance as it changes phases. You may choose to write a story or create a comic strip. For your story or comic, you will create a main character and detail the adventure as your character is exposed to thermal energy, causing it to undergo phase changes from a solid, to a liquid, to a gas. You may create your own comic strip using drawings, presentation software, or this comic strip template.
Your presentation must include the following:
title and introduction of your character, including what substance the character is made of
source of thermal energy your character encountered (conduction, convection, and/or radiation)
detailed description and/or diagram of the particle transformation from solid to liquid phase
detailed description and/or diagram of the particle transformation from liquid to gas phase
Answers
Answer:
ok, This will be a story. (comic can also be done with this. In fact it is better)
The title is the journey of the ice cube. (change it if you want)
Main character - ice cube
There was an ice cube made by the water from the freezer in an ice shop.
The ice cube, with a bunch of other ice cubes, were taken to be packed and sold to a restaurant. The ice cube was excited to where he was going while the other ice cubes are just meh. Now that the ice cubes arrived, a restaurant worker stores the ice cubes in a cooler and later used to put ice in a lemonade. While the lemonade in a glass cup was carried outside the porch of the restaurant by the waiter, the ice cube was fascinated by the environment of the restaurant. The waiter finally serves the thirsty customer and the customer drank almost half of the lemonade but the ice cube did not get in the man's mouth. Instead the other ice cubes went. The ice cube feared the person. Shortly after checking his phone, the customer was about to reach on to the glass until the hands accidentally pushes the glass over and falls. The ice cube and the remaining ice cubes spread away with the wasted lemonade liquid. No one bothered cleaning up the ice cubes, only the glass shards because the floor is a smooth concrete. Outside was really hot from the sun anyways so it would melt the ice cube and sooner evaporate. As it was in liquid form, the "ice cube" was feeling relaxed because it was just chilling on the floor. And when it evaporates, the ice cubes becomes more fascinated since it goes up to the sky while having a sky-view from above.
That is the end.
You can add, edit or even not consider this one. But this is just an example to spark up your ideas. Sorry if I made some English mistakes.
Hope that helped! God Bless you!!!
Explanation:
How do low energy electromagnetic waves compare with high energy electromagnetic waves? Select all
А Low energy waves have higher crests than high energy waves.
B
Low energy waves have lower frequencies than high energy waves.
С
Low energy waves have higher amplitudes than high energy waves.
D
Low energy waves have higher frequencies than high energy waves.
E
Low energy waves have shorter wavelengths than high energy waves.
F
Low energy waves have longer wavelengths than high energy waves.
Answers
Answer:
Explanation:
The different types of radiation are defined by the the amount of energy found in the photons. Radio waves have photons with low energies, microwave photons have a little more energy than radio waves, infrared photons have still more, then visible, ultraviolet, X-rays, and, the most energetic of all, gamma-rays
Select all that apply. PLZ
Which of the following do not illustrate a complete circuit?
D
C
A
B
Answers
do not complete the circuit there is no battery on a and paper dose not conduct electricity
. While at the dentist’s office, Marion noticed the x-ray images of her teeth looked very
different than a photograph image of her teeth. She recalled x-ray images are
produced from x-rays and photograph images are produced from visible light waves.
What can be inferred about the energy difference between x-rays and visible light
waves?
A. X-rays have higher energy than visible light waves.
B. Visible light waves have higher energy than x-rays.
C. X-rays and visible light waves have the same energy.
D. Visible light waves and x-rays can have varying amounts of energy
Answers
Answer:
B
Explanation:
pls help will mark brainliest
Answers
Answer: a!! Bc 10x2=20!
Explanation:
Answer:
20N
Explanation:
F=m*a
F=10*2
F=20N
.....
which class of lever do spoon and scissors belong to?
Answers
Answer:
spoon and scissors belong to first class lever.
hope it is helpful to you
Read the excerpt from " Crossing the Brooklyn Ferry." Flood-tide below me! I see you face to face! Clouds of the west – sun there half an hour high – I see you also face to face. Which statement best describes the effect of repeating the phrase "face to face"? It shows that the narrator sees the facial features of others. It demonstrates that the narrator is surrounded by nature. It demonstrates that the narrator is surrounded by people. It shows that the narrator is suspicious of the sea and sky.
Answers
Answer:
It demonstrates that the narrator is surrounded by nature.
Explanation:
Walt Whitman's "Crossing the Brooklyn Ferry" is a free verse poem written about the speaker's return trip on a ferry. He talks about his daily commute on the Brooklyn ferry, like the other commuters, and how they all share the same experience.
The given lines are from the very first stanza of the poem. The speaker repeats "face-to-face" when talking about nature. He sees the "flood-tide below" and the "clouds" high in the sky. This repetition demonstrates that he is surrounded by nature, amidst the throng of people around him. This shows the speaker's attitude of seeing the beauty of nature in any way he can, despite the bustle of commuting from Brooklyn to Manhattan.
Thus, the correct answer is the second option.
Answer:
B
Explanation:
edge 2023
Attempting to both study and watch television is an example of divided attention.
T
F
Answers
Answer: True - doing both tasks at once is attempting to do two things at once which means you are dividing your attention.
Answer:
true
Explanation:
You push a 22.0 kg box along a rough floor at a constant velocity. The coefficient of kinetic friction between the box and the floor is 0.45. You then release the box and it slows to a stop.
a) For the time where you are pushing the box, draw a free body diagram of the box and calculate the value of each force as you can on your free body diagram.
b) For the time where you have released the box, draw an FBD of the box. Determine the value of the forces on the FBD and determine the unbalanced force.
c) What will the acceleration of the box be when it is released and slowing to a stop?