Answer with Explanation:
Echo depends on "how sound waves are reflected back." A hard object, like the walls of the multipurpose hall, reflects sound waves well; thus, Seema could easily hear her echo. In addition to this, the walls of the hall are also smooth and this further allows the sound waves to bounce. On the other hand, soft objects like bed cushions in Seema's room absorbs sound. This prevents the sound waves from being reflected. In addition to this, the sound waves have hard time bouncing because there are many objects in Seema's room.
Describe two possibilities of what will happen to the universe in the future.
Answer:
technology will take over
Explanation:
technology was have a huge impact on our world , we will be active and we would have new technology that will help and will become a help in everyday lifestyle
pls help me with a and b ill mark u brainlist
Answer:
a) i) In the first image we can see that almost the whole island is covered with forest. While in the second one, we can see that near the edges of the island the amount of forest cover has ben decreased. This may be because is easier to cut the trees near the shore of the island.
ii) There are different motives to cut the trees, one may be to build constructions. People need to remove the trees in an area in order to be able to build in there. Also, the trees can be used in a lot of different ways as raw materials.
b) i) Less forest cover also means that there is a smaller habitable area for the local life (animals, insects, etc...). Then the animals need to be more "cramped", and this can affect greatly the life of them.
ii) There will be less food and fewer natural resources for the locals.
Light waves can be easily blocked but ______ waves pass through all substances? ( fill in the blank)
A box is 2 cm long, 3 cm wide, and 4 cm high. How many cubic centimeters of water can it hold?
(In other words, what is the volume? Don’t forget UNITS!)
Answer:
Explanation:
What is the formula for momentum? *
p = m/v
f = m x a
f = m/s
p = m x v
Answer:
momentum in a body can be calculated using
Momentum=Mass×Velosity
ie(p=m×v)
Question: A=2.70 and B=9.3, then A+B=
a) 12
b) 12.00
c) 12.0
d) None of these
Answer:
a) 12
Explanation:
The given variables are:
A = 2.70
B = 9.3
For addition, the rule states that you cannot be more precise than the least precise measurement given.
The least precise measurement is B = 9.3 and it has 2 significant numbers.
A + B = 2.70 + 9.3 = 12
Choose the incorrect statement.
Report an
question 1
O Heat is a measure of how hot or how cold an
object is
O Heat flows from a substance of higher
temperature to a substance with a cooler
temperature.
O Heat is measured in units of calories or joules.
O Heat is the energy flow from two substances at
different temperatures.
Answer:
first one,heat is a measure of.........
which of the following is a subsurface event takes place during the rock cycle
deposition
erosion
weathering
plate tectonics
Answer:
The answer is A. Cementing...
Explanation:
hope this helps
Answer:
plate tectonics
Explanation:
brainliest also 100% flvs
which part of the picture shows evidence of matter scattering light waves on many diffrent directions
Answer:
A- The image of the moon on the waters surface is distorted.
Explanation:
A room inside a recording studio is lined with soft foam in order to absorb the energy of sound waves produced inside the room. How will sound waves interact with the foam?
A. The foam will refract the waves, causing their frequency to change
B. The foam will take up some of the waves' energy, decreasing their amplitude
C. The foam will cause constructive interference, increasing the waves' amplitude.
D. The foam will reflect the waves, causing an echo.
It's B
Answer:
B. The foam will take up some of the waves' energy, decreasing their amplitude
A student lifts a 1.4-kg box of magazines vertically from rest with an upward force of 52.7 N. The distance of the lift is 1.6 meters. Find the
total work done on the box
-64.41
Answer:
The work done on the box is 21.952 Joules
Explanation:
The given parameters are;
The mass of the box of magazines, m = 1.4 kg
The upward force with which the student lifts the magazine = 52.7 N
The distance (height) of the lift, h = 1.6 meters
The work done on the box = The potential energy gained by the box of magazine, P. E.
Potential energy gained by elevation, P. E. = Mass, m × The acceleration due to gravity, g × Height, h
Where;
The acceleration due to gravity, g = 9.8 m/s²
∴ P. E. = m × g × h = 1.4 kg × 9.8 m/s^2 × 1.6 m = 21.952 Joules
The work done on the box = The potential energy gained by the box of magazine, P. E. = 21.952 Joules
The total work done on the box is 21.952 Joules
The workdone on the box is equal to the potential energy possessed by the body. Mathematically;
[tex]W=P.E=mgh[/tex]
m is the mass of the bodyg is the acceleration due to gravityh is the heightGiven the following parameters
m = 1.4kg
g = 9.8m/s²
h = 1.6m
Substitute the given parameters into the formula:
[tex]W = 1.4 \times 9.8 \timees 1.6\\W=21.952Joules[/tex]
Hence the total work done on the box is 21.952 Joules
Learn more on workdone here: https://brainly.com/question/21854305
1. A rug sits in a sunny place on the floor for a long time. Kiara thinks that light from the sun can
cause the rug's color to fade over time. Can light from the sun cause the rug's color to fade?
a
No. Light is not a physical thing, so it cannot change physical things like rugs.
b
No. Light can only change things by warming them up, so it cannot cause the rug's color to
fade.
Yes. The rug can take in energy from the light, causing the rug's color to fade.
d
Yes. Light from the sun can pull energy out of the rug, causing the rug's color to fade.
Answer:
yes
Explanation:
the rug can take energy from the light causing the rug's color to fade
Yes, Kiara is right because the rug can take in energy from the Sun's light, thereby causing the rug's color to fade: C. Yes. The rug can take in energy from the light, causing the rug's color to fade.
The Sun is typically characterized by nuclear reactions that usually takes place or occur at its center, which eventually result in the release of radiant (heat) energy and electromagnetic radiation into planet Earth.
Although, these radiant (heat) energy and electromagnetic radiation from the Sun are essential and very important to life on planet Earth.
However, a disadvantage of radiant (heat) energy is that when taken in by conducting materials such as rugs, it causes their color to fade (change) over time.
In conclusion, Kiara is absolutely right in her thinking because light energy (sunlight) from the Sun can cause the rug's color to become faded over time.
Read more: https://brainly.com/question/1251115
If all objects have gravitational pulls, why is every object not being constantly accelerated toward every other object?
Answer:
Some object have less gravitational pull than other objects.
Explanation:
i need the letters after the questions
Answer:
b d c a
Explanation:
what is the electric potential 4.20 m from a -3.37*10^-6 C charge?
Answer:
[tex]V =-7221.43 \ V[/tex]
Explanation:
The Electric Potential
The electric potential at a point is equal to the electric potential energy (measured in joules) of any charged particle at that location divided by the charge (measured in coulombs) of the particle.
To calculate the electric potential of a point charge Q at a distance r, we use the formula:
[tex]\displaystyle V=\frac{kQ}{r}[/tex]
Where
[tex]k=9\cdot 10^9\ N.m^2/c^2[/tex]
We are given the following data:
[tex]Q=-3.37\cdot 10^{-6}\ c[/tex]
r = 4.20 m
Calculating:
[tex]\displaystyle V=\frac{9\cdot 10^9*(-3.37\cdot 10^{-6})}{4.2}[/tex]
[tex]\mathbf{V =-7221.43 \ V}[/tex]
Answer:
-7221.43 V
Explanation:
its for Acellus
Three rocks with masses of 1 kg, 5 kg, and 10 kg fall from the same height.
Which of the following describes the inertia of these rocks?
The graph shows the amplitude of a passing wave over time in seconds (s).
What is the approximate frequency of the wave shown?
Answer:
Option B. 0.3 Hz
Explanation:
From the question given above, the following data were obtained:
Period (T) = 3 s
Frequency (f) =?
Frequency is related to the period according to the following equation:
Frequency (f) = 1 / period (T)
f = 1/T
With the above formula, we can obtain the frequency wave as illustrated below:
Period (T) = 3 s
Frequency (f) =?
f = 1/T
f = 1/3
f = 0.3 Hz
Therefore, the frequency of the wave is 0.3 Hz
Answer:
The answer is 0.3 Hz
Explanation:
I took AP EX quiz.
help pls !!!!! which statement is true for chemical reactions but not for nuclear reactions?
Answer:
Explanation:
anyways
B) The nuclei of the atoms involved stay the same .
What are nuclear reactions ?
Nuclear Reactions are processes in which one or more nuclides are produced from a collision between two nuclei or one nucleus and a subatomic particle.
In a nuclear reactions the elements can change from one to another. Nuclei can break apart to form smaller elements. Nuclei can fuse together to make heavier elements. Neutrons can turn into protons and protons into neutrons. But this does not happen in a chemical reaction only composition of elements changes and rearrangement of the molecular or ionic structure of a substance take place in a chemical reaction
hence , correct answer is B) The nuclei of the atoms involved stay the same .
learn more about nuclear reactions:
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The force that pulls falling objects toward Earth is called *
gravity
free fall
acceleration
air resistance
Answer:
Gravity
Explanation:
That's easy because gravity is the only thing that can pull us down that hard at that fast without anything helping it.
Nalah labels ten rats with the numbers 1 through 10. Then, she records how long it takes each rat to run through a maze. She finds it difficult to graph her data in a line graph. What change could she make to her experimental design that would allow her to plot a clearly displayed data trend in a single line graph?
A) Repeat the experiment ten times. Label the y-axis “Time” and the x-axis “Trial.” Plot the average time for all ten rats for each trial of the experiment.
B) Divide the rats into groups of females and males and repeat. Label the y-axis “Time” and the x-axis “Sex of Rat.” Plot the average time for each group.
C) Repeat the experiment ten times. Label the y-axis “Rat Number” and the x-axis “Time.” Plot the individual time for all ten rats for each trial of the experiment.
D) Divide the rats into two groups based on their speed from the initial data. Label the y-axis “Time” and the x-axis “Group.” Plot the average time for each group.
Answer: A) Repeat the experiment ten times. Label the y-axis “Time” and the x-axis “Trial.” Plot the average time for all ten rats for each trial of the experiment.
Answer:
we have to make another question we maxed it out again lol
Explanation:
Answer:
A. Repeat the experiment ten times. Label the y-axis “Time” and the x-axis “Trial.” Plot the average time for all ten rats for each trial of the experiment.
Explanation:
A rock is dropped from a height of 2.7m. How fast is it going when it hits the ground?
PLEASE HELP ME!!!
An object is 45.0 kg here on Earth. What is its mass on Jupiter if the acceleration
due to gravity on Jupiter is 24.79 m/s 2?
A.) 1.82 kg
B.) 45.0 kg
C.) 1120 kg
D.) 441 kg
Answer:
B. 45.0 kg
Explanation:
On earth the object has ;
Mass = 45 kg
acceleration = 9.81 m/s²
On Jupiter, acceleration is 24.79 m/s²
The mass of this object on Jupiter will be 45 kg. It will not change. Mass of an object will only change when you remove part of the object from it or add to it another part. The mass is the same on Earth and on Jupiter. However, due to increased acceleration on Jupiter , the weight will change/ increase because;
Weight = mass * acceleration
On Earth
Weight of the object will be : 45 * 9.81 = 441.45 kg
On Jupiter
Weight of the object will be : 45*24.79 =1115.55 kg
A series of waves with decreasing wavelength labeled radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, gamma rays from left to right as wavelength decreases. At visible light is at a place with colored bands crossing the waves with dotted lines down to a colored spectrum from red to blue labeled in nanometers from 700 to 400. Above the waves are a label Frequency with an arrow pointing left labeled decreased and an arrow pointing right labeled increasing. Topmost is a label Wavelength (meters) with an arrow pointing left labeled longer and an arrow pointing right labeled shorter. Use the image to rank the colors from the color that will refract the least to the color that will refract the most. Least Most
Answer:
Label A: red
Label B: yellow
Label C: green
Label D: blue
Label E: violet/purple
I think this should be correct. I'm sorry if I'm incorrect
Based on the degree of refraction from least to most refracted, the colors are as follows: Red, Orange, Yellow, Green, Blue, Indigo, Violet.
What is refraction of light?Refraction of light is the bending of light rays as they cross the boundary between two media of different densities.
White light consists of seven colors of light; Red, Orange, Yellow, Green, Blue, Indigo, Violet.
The red color has the shortest wavelength and is the least refracted while violet color has the longest wavelength and is most refracted.
Therefore, based on the degree of refraction from least to most refracted, the colors are as follows: Red, Orange, Yellow, Green, Blue, Indigo, Violet.
Learn more about refraction of light at:
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Spiderman has a mass of 80 kg. He knows his webbing will break if it is exposed to a 200 N force. What is the maximum height he can swing off of? You can assume aerodynamic forces prevent Spiderman from travelling greater than 30 m/s.
Answer:
This depends on the writers
if they want they can make spiderman deny the laws of nature
a scooter weighs 120kg. Brakes are applied so that wheels stop rolling and start skidding. Find the force of friction if the coefficient of friction is 0.4
Assuming the scooter is moving horizontally on a flat surface, then by Newton's second law, the vertical forces (the normal force and the scooter's weight) cancel out:
n - w = 0
n = w
n = (120 kg) g = 1176 N
(where g = 9.8 m/s²)
Then the friction force has a magnitude of
f = µ n
where µ is the coefficient of kinetic friction, so that
f = 0.4 (1176 N) = 470.4 N ≈ 470 N
What is the origin of cold, wet air masses?
over water in tropical zones
over land in polar regions
over water in polar regions
over land in tropical areas
jsdsddsd check the image plss
Answer:
C. Over water in polar regions
Explanation:
In the diagrams, the solid green line represents Earth's rotational axis and the dashed red line represents the magnetic field axis. Which diagram accurately shows Earth's magnetic field?
At center the Earth with the sun in the upper left on a black background and a dotted red line showing the Earth's axis of rotation. Yellow circles pass through Earth's poles to both sides of the globe with arrowheads pointing down. A blue line passes a few degrees to the right of the dotted red line above the Equator and a few degrees to the left of the dotted red line below the Equator.
At center the Earth with the sun in the upper left on a black background and a dotted red line showing the Earth's axis of rotation. Yellow circles pass through Earth's poles to both sides of the globe with arrowheads pointing up. A blue line passes a few degrees to the right of the dotted red line above the Equator and a few degrees to the left of the dotted red line below the Equator.
At center the Earth with the sun in the upper left on a black background and a dotted red line showing the Earth's axis of rotation. Yellow circles pass through Earth's poles to both sides of the globe with arrowheads pointing up. A blue line passes on top of the dotted red line.
At center the Earth with the sun in the upper left on a black background and a dotted red line showing the Earth's axis of rotation. Yellow circles pass through Earth's poles to both sides of the globe with arrowheads pointing down. A blue line passes on top of the dotted red line.
Answer:
b
Explanation:
Answer:
b
Explanation:
How many atoms does each element have in 2CaClO3?
1 calcium atom, 1 carbon atom, and three oxygen atoms, so 5 in total.
I’ll give brainliest if you can answer the question in the picture and the question below
After the tuning fork a is vibrated, the tuning fork b is vibrated. The tuning fork b is vibrating because...
A. Resonance
B. Interference
C. Doppler effect
D. Phase
Answer:
the answer would be D if you agree
How could you increase the kinetic energy of a wagon without increasing it's mass
Answer:
send the wagon down a higher hill
