As the wave interacts with a wall, which kind of wave interaction is shown?
absorption
diffraction
refraction
reflection
Answers
reflection thats the answer bois
Related Questions
A 3.00 kg cart on a frictionless track is pulled by a string so that it accelerates at 2.00 m/s/s. what is the tension in the string
Answers
Answer: The tension in the string is 6 N
Explanation:
Tension is defined as the pulling force that is applied on a string, chain etc.. Force is also defined as the mass multiplied by the acceleration of the object.
Mathematically,
[tex]F=ma[/tex]
where,
F = tension or force exerted in the string
m = mass of the cart pulling the string = 3.00 kg
a = acceleration of the string = [tex]2.00m/s^2[/tex]
Putting values in above equation, we get:
[tex]F=3.00kg\times 2.00m/s^2\\\\F=6N[/tex]
Hence, the tension in the string is 6 N
When a boat moves through the water, the waves in front of the boat bunch up, while the waves behind the boat spread out. this is an example of?
Answers
Answer: Doppler Effect
Doppler Effect can be described as the change in wavelength of a wave like upward shift in frequency for an object whom is approaching and an apparent downward shift in frequency for observers from whom the source is receding. This effect can be observed when a boat moves through the water then the waves in front bunch up while the waves behind the boat spread out.
How do scientists detect the various electromagnetic waves coming from space?
Answers
The electromagnetic spectrum defines all the wavelengths of light. Scientist uses different kinds of telescopes sensitive to different wavelengths of the spectrum. Large infrared telescopes are used to view the core of our galaxy. Moreover, radio telescopes are used to map the structure of our galaxy while microwave telescopes captures the remnant glow of the Big Bang.
Which adaptation is likely to increase the chances of survival of an animal in a rainforest?
Capacity to glow in the dark to attract predators
Bright colors as camouflage while stalking prey
Green color so that it can photosynthesize using sunlight
Black-spotted skin coat as camouflage while stalking prey
Answers
Survival = avoiding predators or capturing prey successfully
Answer: Option D
Explanation: The rainforest is the place rich in diversity. There are different types of plants and animals in the rain forest.
The organism that is living their should have black spotted skin coat which can act as camouflage when the organism is stalking the prey.
So, the best adaption in the rain forest will be black spotted skin.
A skier is gliding down a slope at a constant speed. what energy transformation is taking place?
Answers
In fact, the skier starts at a certain height h, so it has gravitational potential energy equal to
[tex]U=mgh[/tex]
as he slides down, he loses this energy. However, the problem says that the speed of the skier remains constant during the motion, so this energy is not converting into kinetic energy, which remains constant. The only possibility is that a frictional force between the skier and the ice is acting on the skier. When the friction acts, the energy of the skier is converted into motion of the molecules of the ice, heating it, so into thermal energy.
When the skier is gliding down a slope at a constant speed the Potential energy is transformed into heat energy.
What will be the energy transformation of a skier sliding at constant speed?We know that energy can not be created nor be destroyed but only can transfer from one form to another.
A skier is gliding down a slope at a constant speed the gravitational potential energy due to height is converting into heat because of the frictional force.
Since the skier is making a constant speed so the Potential energy will not convert into kinetic energy.
So due to the friction between the ice and the skier the energy converts in the form of heat and dissipated to the ice
Thus when the skier is gliding down a slope at a constant speed the Potential energy is transformed into heat energy.
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What is the gravitational potential energy of a 65.7 kg person standing on the roof of a 135 meter building?
Answers
The gravitational potential energy of a 65.7 kg person standing on the roof of a 135 meter building is 86,752.17 Joules, calculated using the formula PEg = mgh.
The gravitational potential energy (PEg) of a person or object is calculated using the formula PEg = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 m/s² on Earth), and h is the height above a reference point in meters.
In the case of a 65.7 kg person standing on the roof of a 135 meter building, the gravitational potential energy can be calculated as follows:
PEg = mgh = (65.7 kg) (9.8 m/s²) (135 m) = 86,752.17 Joules
Hence, the person has a gravitational potential energy of 86,752.17 J when standing on the roof of the building.
A 60 Watt light bulb runs for 120 seconds. How much energy does it use?
Answers
=60 X 120=7200KWh
Based on the concept of the wave-like nature of light, Huygens' theory of light __________ postulates that the more light was "bent" by a substance the slower it would move while traversing across that substance.
Answers
have a nice day!
The correct answer is "refraction", I just answered it on usatestprep.
A bat hits a ball; which has the greater acceleration, the bat or the ball?
Answers
Answer: The ball.
Explanation: Right before the impact, the bat will have a bigger acceleration than the ball (assuming that the ball is trowed softly), and after the impact, there will be some energy of the bat transferred to the ball. As the ball has a lot less mass than the bat, it is "easily" accelerated:
Remember that the second Newton's law says that:
F = m*a
So, after the impact, the ball has a greater acceleration than the bat (Also, if the bat had more acceleration than the ball, it will "push" the ball, but you can see that the ball "escapes" to the bat after the initial impact).
If a substance is in the gas phase, which of qualities of the gas will stay constant?
volume
mass
shape
position of particles
Answers
Answer:
Mass is the right answer
Explanation:
Gas is a state of matter that has no fixed shape and no fixed volume. Gases have lower density than other states of matter, such as solids and liquids. There is a great deal of empty space between particles, which have a lot of kinetic energy. The particles move very fast and collide into one another, causing them to diffuse, or spread out, until they are evenly distributed throughout the volume of the container.
Therefore the only constant property about matter in a gas state is its mass!
Ashkon throws a basketball across the court to his teammate. The ball has 57 J of potential energy and 61 J of kinetic energy. What is the total mechanical energy of the basketball?
Answers
[tex]E=U+K=57 J+61 J=118 J[/tex]
so, the total mechanical energy of the basketball is 118 J.
The total mechanical energy of the ball is the sum of its potential energy U and its kinetic energy K, therefore:
E=U+K=57 J+61 J=118 J
so, the total mechanical energy of the basketball is 118 J.
PART 2!! PLEASE HELP!!
1) which of the following wires would have the least resistance? (*=Degree)
A-An aluminum wire 20cm in diameter at 40* C
B-An aluminum wire 20cm in diameter at 60* C
C-An aluminum wire 40Cm in diameter at 40*C
D-An aluminum wire 40Cm in diameter at 60*C
---------------------------------------
2)A flashlight bulb with a potential difference of 4.5 V across it has a resistance of 8.0 ohms. How much current is in the bulb filament?
A-36 A
B-9.4 A
C-1.8 A
D-0.56 A
---------------------------------------
Answers
Answer:
Number 1 is C
Number 2 is D
.56 A
Is water wet? I think it is but people think it isn’t
Answers
I'll bet you could come together on the description of water too.
what is the gravitational potential energy relative to the ground of a 1.0-kg box at the top of a 50-m building ?
Answers
So in this case PE = 1*9.81*50 = 490.5J
I am assuming that 50m is the height of the building.''
hope this helps
The gravitational potential energy relative to the ground of a 1.0-kg box at the top of a 50-m building is 490 Joule.
What is gravitational potential energy?The energy that an item has or acquires when its location changes as a result of being in a gravitational field is known as gravitational potential energy. Gravitational potential energy can be defined as an energy that has a connection to gravitational force or gravity.
Mass of the box = 1.0 kg.
Height of the box relative to the ground = 50 meter.
Acceleration due to gravity = 9.8 m/s²
Hence, the gravitational potential energy is = Mass of the box × Height of the box × Acceleration due to gravity
= 1.0 kg × 50 meter × 9.8 m/s².
= 490 Joule.
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In an electron cloud an element that is farther away from the nucleus has
Answers
Here is your answer:
The proper answer to this question is that "it has higher energy than a electron cloud closer to the nucleus".
If you need anymore help feel free to ask me!
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If you have to apply 40n of force on a crowbar to lift a rock that weights 400n, what is the actual mechanical advantage of the crowbar
Answers
[tex]MA= \frac{F_{out}}{F_{in}} [/tex]
For the crowbar of the problem, the force applied in input is 40 N, while the force produced in output is equal to the weight of the rock that is lifted, so 400 N. Therefore, the mechanical advantage is
[tex]MA= \frac{400 N}{40 N}=10 [/tex]
The actual mechanical advantage of the crowbar used to lift a 400N rock with a 40N effort is 10.
The actual mechanical advantage of a crowbar is calculated by dividing the load force by the effort force. In this case, if a 400N rock is lifted using a crowbar with an effort of 40N, the mechanic advantage is calculated as follows:
Actual Mechanical Advantage (AMA) = Load Force (N) / Effort Force (N)
AMA = 400N / 40N
AMA = 10
Therefore, the actual mechanical advantage of the crowbar is 10, which means that the force applied is multiplied by 10 times when lifting the rock.
What is the period of a wave if the wavelength is 100 m and the speed is 200 m/s?
(a) 200,000 s
(b) 2 s
(c) 0.5 s
(d) 100 s
Answers
The density of silver is 10.5 g cm3. a piece of silver with a mass of 61.3 g would ovvupy a volume of ?
Answers
[tex]d= \frac{m}{V} [/tex]
The silver has density [tex]d=10.5 g/cm^3[/tex], and the mass of the piece of silver is [tex]m=61.3 g[/tex]. Therefore we can calculate its volume using the previous formula:
[tex]V= \frac{m}{d}= \frac{61.3 g}{10.5 g/cm^3}=5.84 cm^3 [/tex]
The volume of a piece of silver with a mass of 61.3g and a given density of 10.5 g/cm³ would be approximately 5.83 cm³.
Explanation:The subject is about density which is the ratio of the mass of a sample of the substance to its volume. The SI unit for density is the kilogram per cubic meter (kg/m³) or for many situations, the grams per cubic centimeter (g/cm³) for solids and liquids, and grams per liter (g/L) for gases.
Given the density (D) of silver as 10.5 g/cm³ and the mass (m) as 61.3 g, we can use the formula Density = mass/volume or rearranged to Volume = Mass/Density. After inserting the given values into the equation, we get that the Volume (V) would be approximately 5.83 cm³.
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What should a sailboat operator do when approaching a PWC head-on
Answers
In accordance with the International Regulation for the prevention of collisions at sea:
1.- A sailing boat has a passing preference over a motorized boat, except when the motor boat is limited by its draft.
2.- The sailboat must maintain its course and speed.
3.- If it is evident that the PWC does not respond, the sailboat must sound the warning signal, and change its course to starboard.
4.- All actions must be taken as soon as possible.
5.- If a sailboat is using its engine, the situation changes, and in that case, both ships must alter to starboard.
When a sailboat operator approaches a PWC head-on, the operator should change course to starboard (right), while keeping the vessel at a safe speed and maintaining a proper observation to assess risk of collision.
Explanation:When a sailboat operator is approaching a PWC (Personal WaterCraft) head-on, the operator should follow rules regarding right of passage, which are set in place to minimize the risk of collision. These rules are part of the numerous international maritime navigation laws.
The primary method of avoiding collision is by steering to the right, or 'starboard', when it is safe to do so. The rule 'starboard to starboard' means that both vessels should deviate their course to starboard. This is akin to 'keep to your right' rule on the road.
However, before attempting any manoeuvre, it is crucial to maintain a safe speed and have a proper lookout for assessing risk of collision. One should use all available ways like sight, sound or radar to ascertain any risk.
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The voltage of electricity traveling away from a power plant is very high. How high may it be? Why is the voltage so high?
Answers
- The main reason to use these high values of voltage is to reduce power dissipation.
In fact, the cables that are used to transmit electricity have a certain resistance R which is fixed. The power generated from the power plant and that should be transmitted through the lines is P, and it is also fixed.
The power dissipated through the cables is calculated as
[tex]P_{diss}=I^2 R = (\frac{P}{V} )^2 R[/tex]
where I is the current and V the voltage.
As it can be seen, using higher voltages reduce the amount of power dissipated through the lines (while using higher currents will have the opposite effect).
During the Pleistocene, a land bridge connected Alaska and Asia. What could have caused this bridge to from? the ending of an ice age the beginning of an ice age the erosion of the Alaskan coastline the erosion of the Asian coastline
Answers
The continents were larger because water was locked in ice and so the shelves surrounding the continents were exposed. The land bridge between Asia and Alaska was created because of this drop in sea level.
The correct answer is beginning of ice age.
During the time of ice age, the supply of water of locked in the ice of the glaciers.
The level of sea worldwide decreased and the land came out of the sea and joined the two continents.
The environment of the Bering bridge was very dried so it remained a dried and there were no glaciers during the whole ice age.
Vivisection refers to the live dissection of animals or the use of live animals for experimental research. Please select the best answer from the choices provided T F
Answers
the answer to this question is true
Answer:
The given statement is true.
Vivisection derives from the Latin words "vivus" which means "alive" and "sectio" which means cutting.
Thus, it refers to the surgery or dissection of living organism conducted for the experimental purposes.
It not only helps in medical and biological research but also in education and training of the veterinarians and doctors.
What causes the curved path of a projectile??
Answers
The curved path of a projectile, known as its trajectory, is primarily due to the influence of gravity, along with other factors such as air resistance and the rotation of the Earth.
Gravity: The dominant force acting on a projectile is gravity, which pulls the object downward toward the center of the Earth. As a projectile moves forward, gravity pulls it down, causing it to follow a curved path rather than a straight line. The motion creates a parabolic trajectory when air resistance is negligible.
Initial Velocity and Launch Angle: When a projectile is launched, it has an initial velocity and is given a specific angle with respect to the horizontal. These factors contribute to how high and how far the projectile will travel.
Air Resistance: In real-world scenarios, air resistance also plays a significant role in shaping the projectile's path. This force opposes the motion of the projectile and causes deviations from the ideal parabolic path. The effect of air resistance can be complex and often results in a more flattened trajectory.
what are some guidelines for using self-assessments?
Answers
Answer:
Few guidelines which are choosing for the personal self assessments, that work for your best and raise your health standards, instead of others doing this on the behalf of yours.
Explanation:
There are some guidelines which are discussed below for using self assessments.
The observer can learn to organize his learning autonomously.The observer can motivate himself in that way that will work for him.The observer should be aware of his motivational learning and can rely on that.He can re motivate himself again after knowing that his initial motivation is growing thin.He can motivate himself to learn something which are good for his personal growth and development.Quality tests, honesty, and goal are some guidelines for using self-assessments.
It can be beneficial to keep in mind the following rules when utilizing self-assessments:
Recognize the Goal: Self-assessments can be used to evaluate abilities, personality qualities, or emotional health. Understand the goal of your self-assessment and what you hope to achieve from it before you begin.
Quality test: Use tests that have been validated, trustworthy, and well-designed. Look for evaluations that have been created by reliable sources, such as renowned organizations or subject-matter experts.
Reflect Honestly: Go into self-evaluations with an open mind. Instead of responding the way you believe you should, give responses that reflect your actual thoughts, feelings, and actions.
Hence, quality tests, honesty, and goal are some guidelines for using self-assessments.
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Everything we know about stars comes from studying their _____.
mass
color
temperature
radiation/light
age
Answers
Everything we know about stars comes from studying their radiation/light. By measuring the wavelength or frequency of light coming from objects in the universe, we can learn something about their nature. Starts emit a range of wavelengths. The frequency of light is directly related to its color, so it follows that stars have different colors because they have different peak wavelengths of light.
if the mass of a moving object decreases from 100 grams to 25 grams, what happens to its momentum?
a. its reduced 1/4 of the original momentum
b. its reduced 1/2 of the original momentum
c. not affected by change in mass
d. becomes 4 times the orignal momentum
Answers
The correct answer is c. not affected by change in mass
The law of conservation of momentum states that, for an isolated object (=zero net external force acting on it), the momentum of the object is conserved.
As a result, if there are no external forces acting on the object in the problem, its momentum will not change even though its mass changes. In fact, the momentum is given by the product between mass and velocity:
[tex]p=mv[/tex]
therefore, when the mass of the object decreases by a factor of 4, the velocity will increase by a factor of 4, keeping the momentum of the object constant.
Momentum is reduced to one-quarter of its original value when the mass of an object decreases from 100 grams to 25 grams, assuming velocity remains constant. The correct answer is option 'a'.
Understanding Momentum and Mass
Momentum is defined as the product of an object's mass and its velocity, given by the formula: momentum = mass × velocity.
When the mass of a moving object decreases from 100 grams to 25 grams, while assuming the velocity remains constant, we can calculate the change in momentum as follows:
Initial momentum: [tex]mass_{initial} \times velocity = 100 grams \times velocity[/tex]Final momentum: [tex]mass_{final} \times velocity = 25 grams \times velocity[/tex]Therefore, the final momentum is one-quarter of the initial momentum because 25 grams is one-quarter of 100 grams.
How was Uranus different from most other planets
Answers
Here is your answer:
The proper answer to this question is "Uranus is tilted 90 degrees and rotates on its side".
If you need anymore help feel free to ask me!
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Lee pushes horizontally with a force of 75 n on a 36 kg mass for 10 m across a floor. calculate the amount of work lee did. answer in units of j.
Answers
Following the Law of Conservation of Energy, energy cannot be destroyed nor created.
So you would do 75 N x 10m x Cos (0 degrees)= 750 J
The amount of work Lee did is 750 Joules.
Explanation:Work is calculated by multiplying the force exerted on an object by the distance it is moved. In this case, Lee exerts a horizontal force of 75 N on a 36 kg mass, moving it for a distance of 10 m. Therefore, the work done by Lee can be calculated as:
Work = Force × Distance
Work = 75 N × 10 m
Work = 750 J
So, the amount of work Lee did is 750 Joules.
How much work can a 23,000 Watt car engine do in 35 seconds if it is 100% efficient?
Answers
Our given power is 23,000 Watts, and our time is 35 seconds.
23,000 Watts = Work / 35 seconds
We multiply both sides by 35 seconds to get...
805,000 Joules of work (since Watts x seconds = Joules)
The graph that BEST represents the speed of sound relative to the density of the medium it is traveling through is
A)
B)
C)
D)
Answers
Answer:if you're doing usatestprep the answer is B
Explanation:
The graph that BEST represents the speed of sound relative to the density of the medium it is travelling through is B.
What is speed of sound?Particle-to-particle interaction causes a pressure disturbance to propagate across a medium as a sound wave. In order to move energy through the medium, each disturbed particle exerts a force on the next neighbouring particle behind it. This causes that particle to become disturbed from rest.
A sound wave's speed is determined by how quickly the disturbance is transferred from particle to particle, much like any other wave. Speed is the amount of movement a disturbance makes per unit of time, whereas frequency is the number of vibrations a single particle makes per unit of time.
In the given four graph speed of sound versus density, in graph B there is linear variation. So graph B is best.
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