Answer:
foam but thats what i heard from other people
Explanation:
Answer:
If you want to make your insulation even more effective at blocking and absorbing noise that passes through walls or ceilings, you can add a few finishing touches before replacing the drywall. As I’ve explained in my article on the best wall soundproofing, you can add a layer of MLV over the insulation .
Explanation:
The Doppler effect describes the change in the observed __________ of a wave when there is relative motion between the wave source and the observer. *
4 points
Amplitude
Interference
Wavelength
Frequency
Answer:
Frequency
Explanation:
The Doppler effect describes the change in the observed Frequency of a wave when there is relative motion between the wave source and the observer.
Explanation:
• Doppler described, How the color of the Starlight changed with the Movement of the star.
• Waves comes in variety of forms.
There are two common factors that used to describe all types of waves,
1. Wavelength, 2. Frequency.
• For waves that carries light, the frequency of it determines the color of the light it carries.
In relate the the first and last point of the above contexts,
We conclude that the Doppler effect describes the change in the observed frequency of a wave when there is relative motion between the wave source and the observer
Plzzz Help
According to the Doppler effect, what appears to happen when a light source moves closer to an observer?
The waves stretch and frequency appears to increase.
The waves stretch and frequency appears to decrease.
The electromagnetic waves appear more blue in color.
The electromagnetic waves appear more red in color.
Answer:
The electromagnetic waves appear more blue in color.
Explanation:
Doppler's Effect: When a source moves with respect to the observer the frequency of the wave emitted from the source changes. If the source moves away from the observer, the frequency decreases and wavelength increases and vice versa.
Here the light source is moving towards the observer so the frequency will increase and wavelength will decrease. Thus the spectrum will shift towards the blue part. This is known as blue shift. The light wave will appear blue in color.
Answer:
c. is the correct answer
.
The volume of a fixed mass of gas is directly proportional to its
temperature if the pressure is kept constant.*
a. Boyle's law
b. Charles's law
c. gay-lucssac's law
Answer: Charles's law
Explanation:
Charles's law is one of the gas laws, and it explains the effect of temperature changes on the volume of a given mass of gas at a constant pressure. Usually, the volume of a gas decreases as the temperature decreases and increases as the temperature also increases.
Mathematically, Charles's law can be expressed as:
V ∝ T
V = kT or (V/T) = k
where v is volume, T is temperature in Kelvin, and a k is a constant.
To assist with a class demonstration, a student (whose mass is 60 kg) filled a water balloon with 2 kg of water. He then climbed to the second floor (10 metres) of the school and held the balloon out of a window. How much work did the student do?
Answer:
W = 6082.2 [J]
Explanation:
To solve such problems we must use the definition of work. Which tells us that work is equal to the product of force by a distance.
The force will be equal to the product of the mass combined by the gravitational force.
F = m * g
where:
m = combined mass = 60 + 2 = 62 [kg]
g = gravity = 9.81 [m/s^2]
F = 62 * 9.81 = 608.22 [N]
And the work done.
W = F * d
W = 608.22 * 10
W = 6082.2 [J] units in Joules
The work done by the student in lifting both himself and the water balloon to the second floor is calculated to be 6076 Joules, based on the combined mass and the height of the second floor.
Explanation:The student has done work in carrying the water balloon up to the second floor. To calculate the work done, we use the formula work = force x displacement. Here, the force is equal to the weight of the object, which is the mass multiplied by the acceleration due to gravity (g=9.8 m/s²). Since both the student and the water balloon are being lifted, we must account for the total mass.
The combined mass of the student and water balloon is 60 kg + 2 kg = 62 kg. Thus, the weight is 62 kg x 9.8 m/s² = 607.6 N. The work done to lift them 10 meters high is 607.6 N x 10 m = 6076 Joules.
This assumes that the work done only accounts for the potential energy gained by lifting the water balloon and the student, with no other forces or work, such as horizontal movement or air resistance.
what type of meter would be connected on both sides of the resistor in a circuit
the answer IS NOT "An ammeter, which measures current"
Performing Metric Unit Conversions
Try
Which is equal to 5 meters?
50 centimeters
500 decimeters
5,000 millimeters
Answer:
5000 millimeters
Explanation:
1 meter=100 centimeters
50 centimeter=0.5 meters❌
1 meter = 10 decimeters
500 decimeters = 50 meters❌
1 meter =1000 milimeters
5000 milimeters = 5 meters✔
Answer:
5000 millimeters
Explanation:
1 meter=100 centimeters
50 centimeter=0.5 meters❌
1 meter = 10 decimeters
500 decimeters = 50 meters❌
1 meter =1000 milimeters
5000 milimeters = 5 meters✔
Which one of the following is the pigment found in redheads?
a) Keratin
b) Melanin
c) Pheomelanin
d) Cortex
Pheomelanin is the pigment found in redheads. The correct option is C.
Pheomelanin is the pigment found in redheads. It is a cysteine-containing red polymer responsible for red hair and other pigmentation.
Sound is what type of wave (Check all that applies)
Transverse
Longitudinal
Electromagnetic
Mechanical
Answer:
It's a longitudinal and mechanical wave. The the sound is transported parallel to the direction that the sound wave moves and require a medium to travel.
Explanation:
Answer:
a ,b ,e sorry if I'm wrong
Explanation:
have a great day peep's :]
A dog whistle is designed to produce a sound with a frequency beyond that which can be heard by humans (between 20,000 Hz and 27,000 Hz). If a particular whistle produces a sound with a frequency of 25,000 Hz, what is the sound’s speed? Assume the wavelength of this sound wave in air is 0.013m. *
4 points
325 m/s
250 m/s
113 m/s
467 m/s
Answer:
325 m/s
Explanation:
The velocity of waves is given as the product of wavelength and frequency of the waves. This is expressed as s=fw where s is the speed, f is frequency and w is wavelength.
Sometimes, when provided with period, you get frequency as the reciprocal of period.
In this case, since the wavelength is given as 0.013 m and frequency as 25000 then we substitute them into the equation of speed as
S=25000*0.013=325 m/s
Therefore, the speed is 325 m/s
The speed of the sound having a frequency of 25000 Hz and a wavelength of 0.013 m is 325 m/s
From the question given above, the following data were obtained:
Frequency = 25000 Hz
Wavelength = 0.013 m
Velocity = ?The velocity, frequency and wavelength of a wave are related by the following equation:Velocity = frequency × wavelengthWith the above equation, we can obtain the speed of the sound as follow:Frequency = 25000 Hz
Wavelength = 0.013 m
Velocity = ?Velocity = frequency × wavelength
Velocity = 25000 × 0.013
Velocity = 325 m/sTherefore, the speed of the sound is 325 m/s
Learn more: https://brainly.com/question/16305059
Which interaction can result in a wave that has a larger or a smaller amplitude than the original waves?
Answer:
Physical Science - Chapter 20 - The Energy of Waves
A B
interference a wave interaction that occurs when two or more waves overlap
constructive interference interference that results in a wave that has a greater amplitude than that of the individual wave
diffraction the bending of waves around a barrier or through an openin
Explanation:
Problem
Which of the following statements is true of a body that accelerates uniformly? Explain your
answer.
a. Its rate of change of position with time remains constant.
b. Its position changes by the same amount in equal time intervals.
c. Its velocity increases by increasing amounts in equal time intervals.
d. Its rate of change of velocity with time remains constant.
Explanation:
The acceleration of a body is defined as the rate of change of velocity per unit time. Its mathematical form is given by :
[tex]a=\dfrac{v-u}{t}[/tex]
Here,
u is initial speed of a body
v is final speed
t is time taken
Uniform acceleration means that the velocity of an object changes by an equal amount in every equal time period. Hence, the correct option is (c) " Its velocity increases by increasing amounts in equal time intervals".
What types of properties does light have
Answer:
In isotropic substances, there are only two optical properties that can be determined. One of these is the absorption color, as discussed above. The other is the refractive index. Tables of refractive indices for isotropic minerals, list only the refractive index for one wavelength of light.
Explanation:
Which of these is a substance or compound that kills or inhibits bacteria?
A.
an antibiotic
B.
a germ
C.
a microorganism
D.
a vaccine
Answer:
an antibiotic
Explanation:
Final answer:
An A. antibiotic is a substance or compound that kills or inhibits bacteria, and it can be a natural product of microorganisms or synthetically produced in a laboratory.
Explanation:
The substance or compound that kills or inhibits bacteria is known as an antibiotic. Antibiotics are either metabolic products produced by one microorganism to inhibit or kill other microorganisms or can be synthesized chemically in a laboratory. The effectiveness of an antibiotic may vary; some have a broad spectrum of activity against many different kinds of bacteria, while others have a narrow spectrum, targeting specific types of bacteria.
An antibiotic operates by interfering with crucial biological processes of bacteria, often by inhibiting enzymes necessary for their growth, leading to their destruction or prevention of their replication.
What two equations can be used to determine the speed of a wave
Answer:
Wave speed is related to wavelength and wave frequency by the equation: Speed = Wavelength x Frequency. This equation can be used to calculate wave speed when wavelength and frequency are known.
Explanation:
True or False: Earth is larger than the moon, so there is more of a chance for it to block the sun from the moon than for the moon to block the sun from Earth. Therefore, we have a better chance of seeing a lunar eclipse than a solar eclipse.
What is larger then a solar system but smaller then the universe
A. Comet
B. Galaxy
C. Moon
D. Star
Answer: B. Galaxy (happy to help)
Explanation:
Answer:
B. Galaxy
Explanation:
Different galaxies make up the universe and solar systems make galaxies.
Which pair of concepts are closely related?
O A. radiation and inertia
B. electric and magnetic forces
C. friction and gravity
D. entropy and momentum
Answer:
I believe it would be C. friction and gravity
Explanation:
They both deal with pulling/pushing objects.
12456787980-1234567890
Answer:11222220090
Explanation:
Answer:
11222220090
Explanation:
What happens when two waves pass through each other
The interference of the two waves causes its medium to take on a shape that results from the effect of the two individual waves upon the particles of the medium.
Is an 80 dB sound twice as loud as a 40 dB sound? Explain.
Answer:
Yes.
Explanation:
As decibel is a universal unit, 40Db*2=80Db.
Consider the following research question, “When light passes into a medium where it slows down, does it bend toward the normal or away from the normal?” Suppose a student gathers the following data using the “Bending Light” simulation. (You may want to follow what they did by using the simulation to reproduce these results yourself.) What conclusions and generalizations can you make from the data gathered above? Explain your reasoning and provide specific evidence, with sketches if necessary, to support your reasoning.
Light bends towards the normal when moving into a more optically dense medium (where it slows down), and bends away from the normal when moving into a less optically dense medium (where it speeds up). This concept is described by the Law of Refraction or Snell's Law.
Explanation:Understanding Refraction
When light travels from one medium to another, its speed changes due to the differing refractive indices of the media. This change in speed results in the bending of light, a phenomenon known as refraction. If light passes from a medium with a lower refractive index to one with a higher index (a more optically dense medium), the speed of light decreases, and the light ray bends toward the normal (an imaginary line perpendicular to the boundary surface). Conversely, when light passes from a medium with a higher refractive index to one with a lower index (a less optically dense medium), the speed of light increases, and the light ray bends away from the normal.
The Law of Refraction, or Snell's Law, quantitatively defines this relationship between the angle of incidence and the angle of refraction, considering the refractive indices of the two media involved.
An everyday analogy for this behavior is pushing a lawn mower from a footpath (less resistance and higher speed, similar to a less dense medium) onto grass (more resistance and slower speed, similar to a denser medium). When entering the grass, the wheels slow down, and the mower turns towards the normal direction; whereas, when going from grass to footpath, the wheels speed up, and the mower turns away from the normal direction. This analogy helps visualize the directional change of light when it goes from a fast medium to a slow one and vice versa.
Question 4 of 10
2 Points
Which of the following is a cost of urban development?
O
A. Habitat fragmentation
O B. Entertainment
O C. Employment
O
D. Cultural centers
What is it
Habitat fragmentation is a cost of urban development.
Option: A
Explanation:
Though from the view point or perspective of up gradation and development urban development is much needed but in cost of habitat fragmentation which feels very bitter. As habitat fragmentation leads to the loss of habitat, disruption of ecological cycle and environmental equilibrium.
Actually in the name of urban development we the human use our bread giver environment in a wrong way which causes natural disasters in long run. Animals become endangered , vulnerable and extinct with passage of time. Because they forced to enter into human settlements.
Answer:
A
Explanation:
Could someone please fill out this document and give it back to me. I'm willing to give 100 points but all answers need to be correct and show really good working out. I really need to pass this assessment or else I will fail physics.
Hi friend! I'm really sorry, but I was only able to complete the first 2 pages. The whole thing was too big, and I have a curfew (bedtime). Also, I'm only in 9th grade, and I am pretty smart for my age, so I tried to figure everything out, but it was still too confusing for me. Honestly, if you just search the formulas/equations for work, power, volts, watts, joules, etc, it will be easier for you. I have included the doc with my answers below, but the rest of it is blank. Also, I recommend double checking my answers, just to make sure that they are not wrong.
I hope this helps!
- sincerelynini
Jamie has a mass of 35kg what is her weight on earth in newtons
what is one benefit of lifelong physical activity?
Final answer:
Lifelong physical activity provides multiple health benefits, including cardiovascular and muscular fitness, improved bone density, cognitive function, and weight management, which contribute to a better quality of life and extended life expectancy.
Explanation:
One significant benefit of lifelong physical activity is the improvement of overall health, which manifests in multiple dimensions. Engaging in physical activity from a young age helps in maintaining cardiovascular and muscular fitness, improving bone density and strength, enhancing cognitive function, and aiding in weight management. Moreover, regular exercise contributes to improved quality of life and can extend life expectancy.
For instance, older adults can experience a lower risk of falls and related injuries, while individuals of all ages can enjoy benefits such as reduced risk factors for cardiovascular disease, hypertension, obesity, and certain types of cancer. Additionally, physical activity plays a protective role against mental health issues like depression, due to its potential to increase the synthesis of natural euphoriants in the brain. Crucially, even those with chronic conditions can find physical activity more beneficial than harmful, emphasizing the universal importance of an active lifestyle.
is the process of introducing a non blood fluid into the blood
The process described involves the transfusion of non-blood fluids into the blood, such as saline solution or blood substitutes, particularly in emergency situations where typical blood transfusions are not feasible. The success of such interventions relies on a thorough understanding of fluid dynamics and ongoing medical research to improve safety and effectiveness. Xenotransplantation is also notable for its potential to address organ transplant shortages.
Explanation:Introduction of Non-Blood Fluids into the Bloodstream
The process of introducing a non-blood fluid into the blood is known as transfusion or infusion when it involves substances such as saline solution, nutrition, medications, or blood substitutes. Historically, this was accomplished through techniques like those developed by Blundell using gravity or syringe-based systems to introduce donor blood into recipients. In modern medicine, the intravenous administration of a saline solution is common in emergency situations, such as multiple-vehicle accidents or military engagements, where normal blood plasma needs to be replaced quickly to prevent shock.
Research in the field of medicine continuously seeks to improve the effectiveness and safety of blood transfusions and substitutes. For example, during acute hemorrhage when typical blood transfusions are not an option, medical personnel might use artificial blood products that use hemoglobin-based or perfluorocarbon-based oxygen carriers to mimic the oxygen-carrying function of red blood cells (RBCs). This is important in environments where there's a concern for blood type incompatibility or a lack of available blood supplies.
In the broader scope of fluid dynamics in biology, it's essential to understand how these processes like osmosis, dialysis, and diffusion affect the circulation of blood and the cleansing of blood by the kidneys, as well as in medical applications such as kidney dialysis machines. Furthermore, xenotransplantation represents an area of medical research that explores the infusion of human patients with cells or tissues that have come into contact with animal cells, presenting a potential frontier for addressing organ transplant shortages.
Cross country skier moves 32 m west word than 54 m east word and finally 68 m westward what is the distance moved?
Answer:
154m
Explanation:
Distance moved
= 32m + 54m + 68m
= 154m
Which of the following statements describes an actual orbit?
O
A. The Moon is a satellite of Earth.
O
B. The Sun is a satellite of Earth.
O
C. Earth is a satellite of the planet Jupiter.
O
D. The planet Jupiter is a satellite of Earth.
The Moon is a satellite of Earth. This statement describes an actual orbit. Hence, option (A) is correct.
What is orbit?An orbit is the curved path taken by an object in celestial mechanics, such as the path taken by a planet around a star, a natural satellite around a planet, or an artificial satellite around an object or location in space, such as a planet, moon, asteroid, or Lagrange point.
Typically, the term "orbit" refers to a trajectory that repeats itself on a regular basis, though it can also apply to a non-repeating trajectory. According to Kepler's rules of planetary motion, planets and satellites roughly follow elliptic orbits, with the center of mass orbiting at a focal point of the ellipse.
Hence, the Moon is a satellite of Earth. This statement describes an actual orbit.
Learn more about orbital here:
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Why is lightning visible before thunder is heard?
A
Sound cannot reflect off surfaces as easily as light.
B
Sound travels slower than light can travel.
C
Sound is not processed by the brain as fast as light.
D
Sound needs a medium to travel through.
Answer:
B
Explanation:
Amanda is holding a compass and notices that the north pole of the compass points towards the north pole of Earth. She is confused because she knows from her science classes that the north poles of two magnets will repel each
other. How can she explain this phenomenon?
The geographic north pole of Earth is actually near Earth's magnetic south pole
The north pole of the compass was probably pushed in the wrong direction by a nearby magnet
Earth's magnetic poles may have reversed positions while Amanda was observing the compass
Earth's poles are not strong enough to attract any handheld magnets, so it was probably a coincidence that the compass
pointed towards the north pole
Answer: The geographic North Pole of the Earth is actually near the Earth’s magnetic South Pole.
Explanation:
Final answer:
Amanda's compass points north because the compass's north pole is attracted to Earth's magnetic south pole, which is near the geographic North Pole. The use of 'North magnetic pole' for this location is a misnomer and is the root of the confusion.
Explanation:
The confusion Amanda is experiencing is due to a common misunderstanding about the Earth's magnetic poles. The compass needle is attracted to the Earth's magnetic field, which behaves as though there were a huge bar magnet inside the Earth. However, the key to resolving this confusion is understanding that the Earth's geographic North Pole is actually close to the Earth's magnetic south pole. This is why the north pole of a compass needle points towards the geographic North Pole. It is attracted to the opposite, or south-seeking, pole of Earth’s internal magnet. Over the years, the term 'North magnetic pole' has become a misnomer and leads to the misconception that like poles are attracting, when in reality, it is the unlike poles that are attracting.
It's important to note that the alignments of Earth's magnetic field have changed over time and will continue to do so, which means that the current configuration of magnetic poles is not permanent.