Answer:
Climate
Explanation:
I am pretty sure this is climate because climate is what the temperature over time while weather is what the temperature is today. For example, it may we windy today. That is an example of weather. It is hot in Arizona and Cold in Idaho. This is an example of climate.
Final answer:
The increase of the Earth's surface temperature by about 1 degree Fahrenheit over the past century is an example of a change in Earth's climate, which is a long-term trend, as opposed to weather which is short-term. This change is indicative of global warming and has profound effects on the environment and living organisms.
Explanation:
The National Academy of Sciences report stating that the Earth's surface temperature has risen by about 1 degree Fahrenheit in the past century is an example of a change in Earth's climate. This rise in temperature represents a long-term trend that affects ecosystems, weather patterns, and geological processes on a global scale. In contrast, weather refers to short-term atmospheric conditions. The concept of global warming is closely related to this change, as it describes the increase in Earth's average surface temperature due to activities such as burning fossil fuels which release gases that warm the planet. Notably, the increase in global temperatures has implications for habitats, species survival, and agricultural practices. Regional variations in climate change are expected, with some areas, like the Arctic, experiencing more rapid warming.
The rate at which current flows is measured in .
Answer:
Ampere
Explanation:
The ampere is the unit of measurement in the international system. Its equal to a coulomb/second. It can be describe as the rate of charges flowing throught a conductor
If you're talking water current, it could be gallons per hour, liters per second, acre feet per month, feet per second, mile per hour, etc. Any time rate of volume or distance.
If you're talking electrical current, then the unit is almost certainly 'Amperes' .
If a glass is knocked off of a table that is 2.6 m tall, how long does it take for the glass to hit the ground? FILL IN All GUESS STEPS TO GET CREDIT. CHECK EXAMPLE PROBLEM BELOW.
Answer:
0.73 s
Explanation:
The glass is in free fall, so its vertical position at time t is given by the equation:
[tex]y(t) = h + ut + \frac{1}{2}gt^2[/tex]
where
h = 2.6 m is the initial height
u = 0 is the initial velocity of the glass
[tex]g=-9.8 m/s^2[/tex] is the acceleration of gravity (downward since it is negative)
We want to know the time t at which the glass reaches the ground, so when
y(t) = 0
So the equation becomes
[tex]0 = h + \frac{1}{2}gt^2[/tex]
And solving for t, we find
[tex]t=\sqrt{\frac{-2h}{g}}=\sqrt{\frac{-2(2.6)}{-9.8}}=0.73 s[/tex]
Answer:
0.73 sec
Explanation:
formula:X=ViT+(0.5)AT^2
2.6=(0)T+(0.5)(9.8)T^2
cancel:(0)T
2.6=(0.5)(9.8)T^2
take 0.5 to other side and divide with 2.6
5.2=(9.8)T^2
now do the same with 9.8
0.530612 and square root it because u can't leave the T^2
you'll get t=0.73 s
Pls help I rlly don’t understand
Answer: Over time, the objects velocity or speed over time is gradually increasing. For the second one, the line is also showing that the rate at which the objects velocity is increased is constant, since the slope is constant.
possible data where using a bar graph
would be better than using a line graph.
Answer:
Make a graph that represents exotic pet ownership in the United States. There are 8,000,000 fish, 1,500,000 rabbits, 1,300,000 turtles, 1,000,000 poultry and 900,000 hamsters.
Explanation:
The biggest difference is that bar graphs are more versatile while line graphs are better for showing trends over time or another measure with a logical progression of values (such as distance from a given point). Bar graphs can also show frequency distributions (how often you observe different outcomes) much more effectively than line graphs.
Line charts should be used only for time series (chronological) or when there is some other sequence to the dimensions on the x-axis, e.g. dates, months, sequence of stages of a project, sequence of meters along on a gas pipeline, and they should be used to detect trends and patterns, not to give people exact quantitative readings.
Bar charts should be used for comparing specific x-axis values, though they can certainly be used for time series, like line charts. They can also be used to display parts of a whole in favor of pie charts, in which case, the space between the bars should be reduced.
The process which a solid changes to a liquid
Melting
Explanation:
This process is called melting in which a solid changes to a liquid
What is a difference between physical traits and personality traits?
A. Physical traits are mainly determined by a person's environment; personality traits are
determined by both a person's genes and environment.
B. Physical traits are mainly determined by a person's genes, personality traits are
determined by both a person's genes and environment.
C. Physical traits are mainly determined by a person's genes and environment;
personality traits not determined by either a person's genes or environment.
D. Physical traits are mainly determined by a person's genes; personality traits are
determined by genetically engineered food that a person eats.
Answer:
A physical trait is visible to the naked eye, such as, having six fingers; and a character trait is invisible to the naked eye, such as, being charming. Both can be subjective, for instance, claiming somebody has a big nose is a subjective comment about somebody's physical appearance.
The difference between physical traits and personality traits are that physical traits are mainly determined by a person’s genes, personality traits are determined by both a person’s genes and environment.
Answer: Option B
Explanation:
Physical traits are facial similarities, body language, nature of hairs and skins. Mostly the face of siblings and the children will have some similarities with their parents or other members in their family.
So, we can say that physical traits are mainly determined by person’s genes. While the personality traits determine a person’s character , hobbies, likes, dislikes, point of view etc.
Thereby, the personality traits will be coming from genes and also from the environment the person has been grown. Both genes and environment effect equally on a persons’ character and personality.
If the change in position Dx is related to velocity v (with units of m/s) in the equation Dx=Av, the constant A has which dimension ?
Answer: seconds
Explanation:
We have the following equation:
[tex]Dx=A.V[/tex]
Where [tex]Dx[/tex] has unit of meters ([tex]m[/tex]) and [tex]V[/tex] has units of meters per second ([tex]m/s[/tex]).
If we input these units in the equation, we will have:
[tex]m=A(m/s)[/tex]
Clearing [tex]A[/tex]:
[tex]A=\frac{m.s}{m}=s[/tex]
Hence [tex]A[/tex] is related to time, and its unit in this case is second.
the speed of sound is 344 m/s. you see a flash of lightning and then hear the thunder 1.5 seconds later. how far away from the lightning strike are you?
Answer: 516 m
Explanation:
Speed [tex]V[/tex] is defined as the distance traveled [tex]d[/tex] in a especific time [tex]t[/tex]:
[tex]V=\frac{d}{t}[/tex]
Where:
[tex]V=344 m/s[/tex] is the speed of sound
[tex]t=1.5 s[/tex] the time you hear the thunder after you see the flash of lightning
We need to find the distance at which you are from the lightning strike:
[tex]344 m/s=\frac{d}{1.5 s}[/tex]
Finding [tex]d[/tex]:
[tex]d=(344 m/s)(1.5 s)[/tex]
Finally:
[tex]d=516 m[/tex]
Final answer:
To calculate the distance of a lightning strike using the sound of thunder, multiply the time delay of 1.5 seconds by the speed of sound (344 m/s), giving an answer of 516 meters or approximately 0.516 kilometers.
Explanation:
When observing a lightning strike, we often witness the light (the flash) well before we hear the sound (thunder) due to the speed of light being much faster than the speed of sound. In the given scenario, if you hear thunder 1.5 seconds after seeing a flash, we can calculate the distance to the lightning strike by multiplying the time it took to hear the thunder by the speed of sound in air.
Since the speed of sound is approximately 344 m/s, we can estimate the distance to the lightning strike with the following calculation:
Distance = Speed of Sound × Time Delay
Distance = 344 m/s × 1.5 s
Distance = 516 m
Converted to kilometers, the lightning strike was approximately 0.516 km away from you.
which object has a net force of -68
It is difficult to identify a specific object with a net force of -68 without more detailed context. However, we can understand that net force is the vector sum of all forces acting on an object, and it is calculated using Newton's Second Law of Motion: F = ma.
Explanation:The question is about identifying an object with a net force of -68. A net force is the vector sum of all forces acting upon an object. In physics, negative force usually indicates that the force is acting in the opposite direction of the positive axis of a graph. It is challenging to precisely identify the object with a net force of -68 from the given information; we would need more detailed context such as the direction the force is applied or the object's mass. However, the principle of net force can be described using Newton's Second Law of Motion, which states F = ma where F is the net force, m is the mass, and a is the acceleration.
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The object with a net force of -68 N can be determined by considering the vector sum of the forces acting on it. In this case, the net force is approximately 73.76 N and directed at an angle of about 59.9 degrees below the negative x-axis.
Explanation:The object with a net force of -68 N can be determined by considering the forces acting on it.
A free-body diagram shows a northward force of 64 N and a westward force of 38 N.
The net force is the vector sum of the two forces, which can be found using the Pythagorean theorem.
In this case, the net force is approximately 73.76 N and directed at an angle of about 59.9 degrees below the negative x-axis.
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Select the correct answer.
Based on the law of conservation of energy, which statement is false?
O A.
Energy is lost when machines don't work right.
OB. We can't add more energy to the universe.
O c. We can't destroy energy that exists in the universe.
O D.
Energy changes from one form to another.
Answer:
A. Energy is lost when machines don't work right.
Explanation:
Energy cannot be created nor destroyed, according to the Law of Conservation of Energy.
At the end of the 4th half-life, how much of a material will have decayed?
93.75% of a material decays at the end of [tex]4^{th}[/tex] half-life.
Explanation:
The time needed by a material to reduce its initial amount into half is called half-life. It is generally used term in nuclear physics. This is to explain how fast unstable atom undergoes, or how long can stable atoms present, and radioactive decay.
Decay % of material after each half-life to be calculated as follows,
After one half-life- 50% original, and 50% product decayed.
After two half-life- 25% original, and 75% product decayed.
After three half-lives- 12.5% of original, and 87.5% of decay product.
After four half-lives- 6.25% original, and 93.75% of decay product.
Answer:
15/16
Explanation:
a substance has a melting point of 0°C and a boiling point of 100°F. The substance is most likely..
1.) Water
2.) Hydrogen
3.) Gold
4.) Table Salt
calculate the speed of the wave with the frequency of 10khz and wavelength of 2m
speed = wavelength × frequency
but the frequency was given to as
10khz ,
which means
[tex] {10}^{3} [/tex]
= 1000
so now frequency = 1000hz
substitute it into the equation
speed = 1000×2
speed = 2000ms^-1
The speed of the wave with the frequency of 10 kHz and a wavelength of 2 meters is 20,000 meters per second, or 20 km/s.
Explanation:To calculate the speed of a wave, we can use this simple physics formula: speed = frequency × wavelength. In this case, the frequency of the wave is 10 kHz (or 10,000 Hz) and wavelength is 2 meters. Knowing these values, we can substitute them into the formula.
Speed = 10,000 Hz × 2 meters
Therefore, the speed of the wave is 20,000 meters per second, or 20 km/s.
The speed of the wave with the frequency of 10 kHz and a wavelength of 2 meters is 20,000 meters per second, or 20 km/s.
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4.) An apartment building is on fire and a guy is trapped on the fire escape ladder. There is a
dumpster that is 6.3m away and is filled full of trash, and he is 7m above it. If he jumps totally
in the horizontal direction, how fast does he have to jump in order to land in the dumpster?
Answer:
5.3 m/s
Explanation:
First, find the time it takes for him to fall 7m.
y = y₀ + v₀ t + ½ at²
0 = 7 + (0) t + ½ (-9.8) t²
0 = 7 − 4.9 t²
t ≈ 1.20 s
Now find the velocity he needs to travel 6.3m in that time.
x = x₀ + v₀ t + ½ at²
6.3 = 0 + v₀ (1.20) + ½ (0) (1.20)²
v₀ ≈ 5.27 m/s
Rounded to two significant figures, the man must run with a speed of 5.3 m/s.
Which of the following represents the wavelength of a wave?
Diagram of a wave. The point between the highest and lowest points is labeled A; the height is labeled B; the highest point is labeled C; the distance between the highest points of consecutive waves is labeled D.
A
B
C
D
Answer: D. the distance between the highest points of consecutive waves
Explanation:
The wavelength of a wave is defined as the distance traveled by a periodic perturbation that propagates through a medium in a given time interval. It is usually represented by [tex]\lambda[/tex] and can be calculated if the frequency of the wave is known, since there is an inverse relationship between both.
In the specific case of a periodic sine wave (which is the way in which a wave is usually represented graphically) the wavelength can be determined as the distance between two consecutive maxima of the disturbance.
Therefore, the correct option is D.
Answer:
Explanation:
D. the distance between the highest points of consecutive waves
Which state of matter has the greatest amount of particle movement?
Answer:
The state of matter that has the most energy is gas.
Explanation:
In a solid, there is limited room for molecules to move around.
Answer:
The greatest amount of particle movement is in gaseous state of matter.
Explanation:
It is known that matter can be classified as solid, liquid and gas states. The molecules in each state exhibit vibrations or movement of particles will be occurring in them. The kinetic energy exhibited by the different states of matter depend upon the bond strength.
If the bond strength is more and if the particles are densely packed like in solids. So the gas state has least bond strength and they are loosely packed molecules and thus the particles can move freely with more kinetic energy.
What are 5 most important facts should be known the movement of heat energy?
Explanation:
heat energy is the movement of molecules or atoms in solids, liquids and gases.
facts about movement of heat energy.
1) heat energy transferred through three main processes that are: conduction , convention and radiations.
2) our earth absorbs energy coming from sun through radiation.
3) entire universe is made up of atoms when they moves they transfer heat.
4) heat energy can change the state of matter as it causes melting.when a solid such as ice absorb heat energy it convert into liquid.
5) heat energy keeps moving until both objects reach at same temperature.
The movement of heat energy involves thermal conductivity, heat transfer methods, specific heat, conservation of energy, and spontaneous heat transfer. These fundamental principles explain how heat energy moves and transforms within systems. Understanding these concepts is crucial in practical applications such as cooking and climate control.
The movement of heat energy, also known as heat transfer, is a fundamental topic in physics. Here are the five most important facts to know:
Thermal Conductivity: Matter has a property called thermal conductivity that determines how well it can transfer heat. For example, metals generally have high thermal conductivity, making them good conductors of heat.Heat Transfer Methods: Heat energy can be transferred through conduction, convection, and radiation. Conduction occurs in solids where molecules transfer energy by vibrating in place, convection occurs in fluids (liquids and gases) through the movement of the fluid itself, and radiation involves the transfer of heat through electromagnetic waves.Specific Heat: The specific heat of a substance indicates how much energy is required to raise the temperature of one gram of the substance by one degree Celsius. For instance, water has a high specific heat, meaning it requires more energy to heat up or cool down compared to many other substances.Conservation of Energy: According to the law of conservation of energy, energy cannot be created or destroyed, only transferred or converted from one form to another. This principle is crucial in understanding how heat energy moves and transforms within systems.Spontaneous Heat Transfer: Energy is transferred spontaneously from a higher temperature system to a lower temperature system. This is the fundamental process of heat transfer known as heat flow.These concepts are essential for understanding various physical phenomena and applications, such as cooking, climate control, and engineering systems.
A human hair is approximately 56 µm in diameter.
Express this diameter in meters.
Answer in units of m
Answer:
The diameter is 0.000056 m
Explanation:
Lets explain the relation between the meter and the micrometer
1 Meter is equal to 1000000 (one million) micrometers
1 micrometer = [tex]\frac{1}{1000000}=\frac{1}{10^{6}}=10^{-6}[/tex]
The symbol of the meter is m
The symbol of micrometer is μm
A human hair is approximately 56 µm in diameter
We need to express this diameter in meter
To do that we divide this number by 1,000,000 or multiply it by [tex]10^{-6}[/tex]
→ [tex]\frac{56}{1000000}=0.000056[/tex] 56 µm = 0.000056 m
→ OR
→ [tex]56*10^{-6}=0.000056[/tex]
→ 56 µm = 0.000056 m
The diameter is 0.000056 m
d=1/2at^2
solve for a
Answer:
a = 2d / t²
Explanation:
d = ½ at²
Multiply both sides by 2:
2d = at²
Divide both sides by t²:
a = 2d / t²
The solution of the acceleration a would be (2dt²) by using the equation d=1/2at²
What are the three equations of motion?Newton provided three equations of motion.
This is how the first equation is presented.
v = u + at
The second equation is given as follows.
d= ut + 1/2×a×t²
Following is the third equation.
v² - u² = 2×a×d
Keep in mind that only uniform acceleration is supported by these equations. where the initial and final velocities, respectively, are u and v.
d is the object's overall distance traveled, and a represents its acceleration.
As given in the problem we have to solve the acceleration by using newtons second equation given that the initial velocity is zero
By using The second equation is given as follows.
d = ut + 1/2×a×t²
as u =0
d=1/2at²
a = d/(1/ 2t²)
a =2dt²
Thus, The solution of the acceleration a would be (2dt²) by using the equation d=1/2at²
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Please I really need help
Answer:
10 Is the last one (D) 11 is the one you picked, or the third option. (C)
Explanation:
Melanie watched the path a baseball followed after a pitcher threw it. She noticed that the ball traveled horizontally away from the pitcher as well as downward toward the ground. What force caused the ball to accelerate in the downward direction when it was thrown?
Answer:gravity
Explanation:
Gravity is the force that causes a baseball to accelerate downward when thrown, resulting in a constant negative vertical acceleration that contributes to the ball's parabolic trajectory.
Explanation:The force that causes a baseball to accelerate downward when thrown is gravity. Despite the ball traveling horizontally away from the pitcher, gravity acts downwards upon the ball from the moment it leaves the pitcher's hand until it contacts the ground. This creates a parabolic trajectory, characterized by a vertical acceleration that is constant over time, as indicated by the ball's motion being split into two perpendicular components: horizontal motion due to the initial throw, and vertical motion due to the force of gravity.
The graph of the ball's vertical acceleration versus time would show a negative value that remains constant, representing the unchanging acceleration due to gravity in the downward direction, which is typically approximately -9.8 m/s2 near Earth's surface. This downward acceleration is independent of the ball's horizontal velocity.
6. What does the slope of a velocity-time graph indicate?
The slope of a velocity-time graph represents the acceleration of an object.
Acceleration is the rate of change of velocity over time. A steeper slope indicates a greater acceleration, meaning the object is speeding up or slowing down more rapidly.
A horizontal line on the graph, where the slope is zero, indicates constant velocity, implying no acceleration. If the slope is negative, the object is decelerating or moving in the opposite direction. In summary, the slope of a velocity-time graph provides valuable information about how an object's velocity changes over time, offering insights into its acceleration or deceleration behavior.
A scientific theory
1)Holds the highest level of acceptance
2)Explains a number of facts
3)Uses specific hypotheses and descriptive laws that have been well-tested
4)All of the above
5)None of the above
Answer: 4
Explanation: the scientific theory i believe can do all of the answer that are listed above
Answer: 4)All of the above
Explanation:
A scientific theory is the detailed explanation for the cause of natural process, natural event occurring in the world. It can be tested on the basis of the experimental trials, and direct observations. Thus this holds the validity in results and accepted by the entire scientific community.
It holds the highest level of acceptance from all over the world and especially by the scientific communities. It also explains a number of facts those were unknown. The theory is supported by the descriptive laws and a hypothesis is created in before the actual generation of the theory so as to prove the facts experimentally.
Graph y=2 line find value of y when x =5
Explanation:
y=2 is a straight horizontal line through the point y=2.
As such for all x-values, the y-value will be the same which is y=2 in this case.
LOOK AT THE EQUATION !
The equation tells everything that Y depends on, and what the exact value of Y is for every possible value of all the things that it depends on.
THIS equation says: "The value of Y depends on '2'. At every moment, no matter what the value of '2' is, Y is equal to it."
The equation tells you that.
So now, we can actually tell the future ! We know that the value of '2' is always going to be TWO. If we use the powerful equation that we have, we know that Y is always going to be TWO.
Does the value of Y depend on the value of X ? If it does, then X must be there on the right side of the equation. But X is not there ! That means that X has no influence on the value of Y. Y is always 2 !
You say X=5 ? That's nice. Who cares ? ! ? It has no influence on Y . Y is ALWAYS 2 .
Which of the following will not conduct an electrical current?
pure water
tap water
aquarium water
ocean water
Answer:
Pure water won’t conduct electricity
Option A
Explanation:
Pure water doesn’t contain salts or impurities. It is the salts that dissociate to form ions that act as charge carriers in conducting solutions. For a medium to conduct electricity it should have carriers to carry the electrical charge.
Thus absence of charge carriers make pure water non conducting. Charge carriers in metals are electrons and in ionic solutions they are positive and negative ions.
Tap water, aquarium water and ocean water contains dissolved electrolytes. When electricity is passed through them the electrolytes dissociates into ions and these ions conduct electricity.
Answer:
pure water. plz vote brainliest
Explanation:
A force of 15 newtons is applied to both Object A with a mass of 25 kilograms and Object B with a mass of 50 kilograms. What is true about the
acceleration of Object A and Object B?
Answer:
Acceleration of Object A = 0.6 m/s²
Acceleration of Object B = 0.3 m/s²
Acceleration of Object A is double than the acceleration of Object B.
Explanation:
According to the Newton's 2nd law of motion, Acceleration of an object by a net force is directly proportional to the magnitude of that net force and in the direction of that net force and inversely proportional to the mass of the object
Mathematically
F ∝ a
F = ma
Given data:
F = 15 N
m₁ = 25 kg
m₂ = 50 kg
F = m₁a₁
a₁ = F/m₁
a₁ = 15/25
a₁ = 0.6 m/s²
F = m₂a₂
a₂ = F/m₂
a₂ = 15/50
a₂ = 0.3 m/s²
It can be seen that acceleration of Object A is double than the acceleration of Object B.
3. Land iguanas in the Galápagos are examples of ____________
species found only in one geographic region
Answer:
There are three species of land iguana found in the Galapagos Islands. The well-known yellowish land iguanas include Conolophus subcristatus, native to six islands, and Conolophus pallidus, found only on the island of Santa Fe.
A boy is pulling a load of 150N with a string inclined at an angle 30 to the horizontal if the tension of string is 105N the force tending to lift the load off the ground is
The force tending to lift the load (vertical force) is equal to 22.5N.
Why?
Since the boy is pulling a load (150N) with a string inclined at an angle of 30° to the horizontal, the total force will have two components (horizontal and vertical component), but we need to consider the given information about the tension of the string which is equal to 105N.
We can calculate the vertical force using the following formula:
[tex]VerticalForce=Force*Sin(30\° )=(BoysForce-StringForce)*\frac{1}{2}\\\\VerticalForce=(150N-105N)*\frac{1}{2}=VerticalForce=45N*\frac{1}{2}=22.5N[/tex]
Hence, we can see that the force tending to lift the load off the ground (vertical force) is equal to 22.5N.
Have a nice day!
What are two examples of observations you might make, and two examples of inferences you might make, when looking at logs burning in a campfire?
Answer:
One observation would be the change in odor when observing the logs burning in a campfire and because of that a inference could be because a change in odor is occurring, a chemical change is happening to the logs (combustion).
A second observation would be that the wood being burned gave off smoke at first but then stopped and because of that a inference would be that the compound that were being burned creating the smoke was all evaporated from the wood.
how can you increase the intensity of sound waves
Answer
The intensity of a sound wave depends on the pressure of the wave,density of the medium and speed of sound in the medium. Higher density and higher sound speed both give a lower intensity. and may be it is because that sound wave is more characterize by wavelength than frequency..explanation
Explanation:
As decibel levels get higher, sound waves have greater intensity and sounds are louder. For every 10-decibel increase in the intensity of sound, loudness is 10 times greater. Intensity of sound results from two factors: the amplitude of the sound waves and how far they have traveled from the source of the sound.
Final answer:
The intensity of sound waves can be increased by raising the amplitude of the wave oscillations, which can be done by increasing the volume on the speaker or enhancing the instrument's playing technique, such as pressing a bow more firmly against stringed instrument strings.
Explanation:
To increase the intensity of sound waves, one can manipulate several factors. The intensity (I) of a sound wave is directly proportional to the square of its amplitude (Δp) and inversely proportional to the density (p) and the speed (vw) at which the wave travels, as per the equation I = (Δp)2 / (2pvw). Therefore, increasing the amplitude of sound wave oscillations will result in a more intense sound. This can be achieved, for example, by increasing the volume on a speaker, which increases the amplitude of the sound waves it produces.
Additionally, when sound travels through a medium such as a string, the medium's tension can affect sound intensity. A tight string will transmit sound waves more efficiently than a loose one. Similarly, when a bow is pressed more firmly against the strings of a musical instrument, the increased normal force results in a higher frictional force, which in turn increases the work done (W = Fd) and subsequently the amplitude of the produced sound wave.
It's also important to note that the amplitude and loudness of a sound wave are related; a wave with larger amplitude typically sounds louder because it carries more energy. The energy carried by a wave is proportional to the amplitude squared, meaning doubling the amplitude increases the power by a factor of four. Moreover, the frequency of the sound also impacts the energy reaching your ear, as higher frequency sound waves make the same amplitude hit your eardrum more often.