the difference of 10 dB is considered as having 10 times the intensity, so difference of 40 dB means :
=》10 × 10 × 10 × 10
=》10000 times
so the the intensity of one sound is 10000 times the other one.
A pelican flying along a horizontal path drops a fish from a height of 12.3 m. the fish travels 16.0m horizontally before it hits the water below. What is the Pelican's initial speed?
Answer:
10.1 m/s
Explanation:
Let the coordinates of the pelican's position be (x, y).
Now, since it is dropped from a height of 12.3 m, then initial velocity is zero and using Newton's 2nd law of motion, we have;
12.3 = 0 - ½gt²
½gt² = 12.3
t² = 12.3 × 2/9.8
t² = 2.51
t = √2.51
t = 1.5843 s
Now, it travels 16.0m horizontally before it hits the water below. Using the formula, distance = speed × time, we have;
16 = v_x•t
Thus;
16 = v_x × 1.5843
v_x = 16/1.5843
v_x = 10.1 m/s
Now, the velocity in the vertical y-direction is zero.
Thus;
v = √((v_x)² + (v_y)²)
v = √((10.1² + 0²))
v = 10.1 m/s
Which of the following depicts xylem?
The shortening of a transmitted signal's wavelength and/or an increase in its frequency, which indicates that the object is
moving toward the observer, is called the
Answer: The Doppler effect occurs when a source of a wave is moving relative to an observer (or the observer is moving relative to the source). In this case, the apparent frequency of the sound, as heard/seen by the observer, is shifted with respect to the original frequency of the wave.
More specifically, the relationship between the apparent frequency, f', and the original frequency, f, is given by:
where:
is the velocity of the wave
is the velocity of the observer relative to the source, and it is positive if the observer is moving towards the source, and negative if the observer is moving away from the source
is the velocity of the source relative to the observer, and it is positive if the source is moving away from the observer, and negative if the source is moving towards the observer
The doppler effect occurs in many daily-life situations: for instance, when an ambulance approaches you, you hear an increase in the apparent frequency of the siren due to the Doppler effect. Another example is the movements of distant galaxies from us: when they move away from us, the apparent frequency of the light they emit decreases, so their wavelengths appear to increase towards the red color (red-shift); on the contrary, when they are moving towards us, the apparent frequency seems to increase, so the wavelength seems to decrease towards the blue color (blue-shift).
Explanation:
What are parts of a pulley
. The organisms shown below live in or near bodies of water. Some are
classified as vertebrates and some as invertebrates.
Which organism is classified as an invertebrate?
A. crab
B. fish
C. manatee
Answer:
A. crab
Crab is an invertebrate.
Which beach balls have potential energy and not kinetic energy?
Answer:
Beach ball 4
Explanation:
it is because, Potential Energy = M G H
P(e) directly proportional to H.
if H increase then P energy also increases
What protects and supports body organs and provides a framework the muscles use to support movements,made up of bones and joints
Answer: Skeletal system
Explanation:
The skeletal system is a framework of the body. It comprises of connective tissues like bones, tendons, ligaments, and cartilage. All these connective tissues of the skeletal system connect with the muscular system of the body this helps in the locomotion of the body. The conjugation of the musculoskeletal system will also protect the internal organs of the body and will prevent the internal organs from injuries.
Answer:
the skeletal system
Explanation:
Because our skeleton is the framework of the body. :)
5. What is the name of the Scientist who began classification?
O Carl Linnaeus
O Albert Einstein
Sir Issac Newton
Answer:
Carl Linnaeus discovered Classification
Answer:
Carl Linnaeus
Explanation:
Mark me Brainllest
What is physic?............
Physics is the study of nature and law
Answer:
Physics is the science of matter and how matter interacts. Matter is any physical material in the universe. Everything is made of matter. Physics is used to describe the physical universe around us, and to predict how it will behave.
Use Newton's second law of motion and a free-body diagram to...
1. ...calculate the normal force acting upon a 50-kg passenger who accelerates upward at a rate of 3.0 m/s/s.
2. ...calculate the normal force acting upon a 50-kg passenger who accelerates downward at a rate of 3.0 m/s/s.
Please don't put any links or I will report you.
A plane flies along a straight line path after taking off, and it ends up 220 km farther east and 100.0 km farther north, relative to where it started. In what direction did it fly on the straight line path?
Answer:
North east
Explanation:
The distance travelled by a plane from one point to another is the shortest distance between the two points. This distance travelled is usually a straight line path from point 1 to point 2.
Since the plane ends up 220 km farther east and 100.0 km farther north, the direction of flight for the plane is in the North-East direction.
Let x represent the distance travelled by the plane. Hence:
x² = 100² + 220²
x² = 58400
x = 241.66 km
Write an essay about the things an individual must do in order to adapt and survive the changes that are happening in his/her environment.
A drop of oil of volume 10 ^-10 m3 spreads out on water to make a circular film radius 10^-1m what is the thickness of the film
Answer:
The thickness of the film is = 3.183e-9m
Explanation:
It will help us if we understand that the shape of the circular film can be approximated to be a cylinder. The height of this cylinder, or its thickness, in this case, will be very small.
Since we can approximate the shape of the drop of oil to be a cylinder, after it has spread out on the surface of the water, we can use the cylindrical geometric formulas to find out how thick the film is.
The volume of a cylinder = [tex]\pi r^2 h[/tex]
our radius is given as [tex]10^{-1}m = 0.1m[/tex]
the volume is [tex]10 ^{-10} m^3=1e-10m^3[/tex]
Remember that our task is to find the height of the cylinder. We can do this by making the height the subject of the formula.
[tex]h = \frac{Volume}{\pi r^2} = \\\\\frac{1e-10}{\pi \times 0.1^2} = 3.183e-9m[/tex]
Therefore, the thickness of the film is = 3.183e-9m
Please someone help me. I don't know how to do this and it's due tonight.
Answer:
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please explain application of Stephan boltzmann law
Answer:
This law is used to find the luminosity (the rate of energy released), for an object given its surface temperature. This law assumes the body acts as a black-body radiator (an object that emits energy from the entire EM spectrum)
For a given object with a constant surface area, the Stefan-Boltzmann law says that luminosity is proportional to the temperature raised to the fourth power.
Explanation:
The eye of the Atlantic giant squid has a diameter of 3.50 × 10^2 mm. If the eye
is viewed in a concave mirror with a radius of curvature equal to the diameter
of the eye and the eye is 0.800 × 10^3 mm from the mirror, how far is the image
from the mirror? What is the size of the image? Is the image real or virtual?
Answer:
q = 224 mm, h ’= - 98 mm, real imagen
Explanation:
For this exercise let's use the constructor equation
[tex]\frac{1}{f} = \frac{1}{p} + \frac{1}{q}[/tex]
where f is the focal length, p and q are the distance to the object and the image respectively.
In a mirror the focal length is
f = R / 2
indicate us radius of curvature is equal to the diameter of the eye
R = 3,50 10² mm
f = 3.50 10² /2 = 1.75 10² mm
they also say that the distance to the object is p = 0.800 10³ mm
1 / q = 1 / f - 1 / p
1 / q = 1 / 175 - 1 /800
1 / q = 0.004464
q = 224 mm
to calculate the size let's use the magnification ratio
m = [tex]\frac{h'}{h} = - \frac{q}{p}[/tex]
h '= [tex]- \frac{q}{p} \ h[/tex]
h ’= - 224 350 / 800
h ’= - 98 mm
in concave mirrors the image is real.
I’m think 3 or 1.. am I right?
Answer:
C-3 I beleive it is three!!!!
Explanation:
Hope this helps!
Have a grreat day!
-Hailey
Answer:
it is n2+3
Explanation:
what is frictional less pulley
Answer:
Conditions under which the belt and pulleys are operating – The friction between the belt and pulley may decrease substantially if the belt happens to be muddy or wet, as it may act as a lubricant between the surfaces.
Explanation:
I hope that this would be helpful
how do we calculate the value of work?
Answer:
Work = Force × Distance
Explanation:
Work = Force × Distance
The SI unit of work is Joule
-TheUnknownScientist
Which of the following statements best describes a difference between
nuclear fission and nuclear fusion reactions?
Nuclei gain electrons during fission and release electrons during fusion.
Fission generates potential energy, and fusion generates kinetic energy.
С
C
Heavy nucleus split during fission and two light nuclei bind together during
fusion.
O
Fission forms heavier elements, and fusion forms lighter elements.
Answer:
C
Heavy nucleus split during fission and two light nuclei bind together during
fusion.
Use the "Law of Reflection" to describe why you cannot see your reflection in a piece
of paper.
Answer:
it does not mirror the image
describe how a wheel and axle work?
A weally works when you pull something and a axle is something that you can push
Explanation:
I hope this helps
Why do electric fish need to force electric charges to move?
A pulse with a height of +0.5 meter encounters a second pulse with a height of +2.3 meters. A. The two pulses interfere: B. The resulting height of the medium when the pulses interfere will be: ____m
CAN SOMEONE IN THE COMMETS ON EDG HELP ME WITH THIS IM NOT DOING THIS 4 POINTS I ACTULLY NEED HELP AND STRUGGLING U GUYS CAN CAN PUT A 1.0 STAR I REALLY DONT CARE BUT CAN SOMEONE HELP PLZ
Can someone help me with this please
What way is more effective when trying to make magnets repel further/faster, using strong magnets over weak magnets or putting the magnets closer together?
Answer:
north pole of a magnet repels the north pole of another magnet no matter of their shape , size , weakness , strength ,etc .
Explanation:
doc based on this lab: https://phet.colorado.edu/sims/html/wave-on-a-string/latest/wave-on-a-string_en.html
Answer:
hope it helps make brainlliest ty
A body of mass 36 g moves with SHM of amplitude A = 13 cm and period T = 12 s. At
time t=0 the displacement, x, is 13 cm. (a) Find the velocity when x = 5 cm. (b) Find the
force acting on the body when t = 2 s.
Answer:
Explanation:
.......................
15 points!! pleas help! A rollercoaster cart that has a mass of 4500 kg has 67.5 kJ (kilojoules), or 67,500 J (joules), of gravitational potential
energy. What is its height above the ground?
PT.2
The same 4500 kg rollercoaster cart is moving with 63.0 kJ (kilojoules), or 63,000 J (joules), of kinetic energy at the
bottom of its biggest hill. What is its velocity?
How do media literacy , information literacy and technology literacy and media and information literacy differ in terms of use?
Answer:
Media literacy creates a conscious awareness, the ability to understand, analyze, the messages various media like the newspapers, the radio, that is for the consumer, and it also promotes how best media create information for production.
While information literacy and technology literacy differs from other literacy asked in the question above, as information literacy and technology could be used when describing getting information through adequate research and further dishing out this available information so as to effectively use the information with the aim to solve problems, create awareness, or educate, through technologies such as for example, email.
Lastly, media and information literacy differ in terms of use from the other two explained above, as media and information literacy describes discerning information credibility, accuracy, and objectivity of sources they come from, and it shows people how important it is to have credible information to make informed judgments and the ethical use of the information they consume.