These four surfaces are opaque; that is they reflect or absorb certain rays of light determine the color
Of each surface based on the diagrams
Answers
Similarly, in the second figure, the surface absorbs all colors except for blue, and so the surface will appear blue to our eyes.
In the third figure, the surface absorbs all colors, so it will appear black to our eyes (because no colors are reflected, and black=absence of colors).
In the fourth figure, all colors are reflected: this means the surface will appear white to our eyes (white= sum of all colors).
Related Questions
PLEASE PLEASE HELPP
Which of the following describes how the Mid-Atlantic Ridge formed on Earth at a divergent plate boundary?
Plates moved in closer
Plates slid past each other
Plates moved with each other in the same direction
Plates moved apart
Answers
A ski lift carries people along a 220-meter cable up the side of a mountain. Riders are lifted a total of 110 meters in elevation. What is the idea mechanical advantage of the ski lift?
Answers
The Ideal Mechanical Advantage (IMA) of the ski lift is 2. It is calculated by dividing the total length of the lift cable by the total change in elevation.
Explanation:The question is asking about the Ideal Mechanical Advantage (IMA) of a ski lift. The IMA is determined by the ratio of the distance over which the input force is applied to the distance over which the output force is applied.
In the case of a ski lift, the input force is applied over the entire length of the cable, while the output force is applied over the change in elevation. Therefore, the IMA of the ski lift would be the total length of the cable (220 meters) divided by the total change in elevation (110 meters), giving an IMA of 2.
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A virtual image produced by a lens is always
A. located in the back of the lens.
B. smaller than the object.
C. larger than the object.
D. located in front of the lens.
Answers
Option (D) is correct. The virtual image is always firmed in front of the lens or on the same side of the lens as of the object.
Explanation:
The image formed by the lens are categorized in two broad categories.
Real ImagesVirtual ImagesThe Real Image is a image that is formed by the actual meeting of the incoming rays from the object. The real image is an image that can be obtained on the screen.
The Virtual Image is an image that is formed by the the imaginary meeting of the incoming rays from the object. The virtual image cannot be obtained on the screen.
Since the real image is formed by the actual meeting of the rays, the rays would meet on the other side of the lens as that of the object. It means that a real image is formed behind the lens whereas for a virtual image, the diverging rays from object are extended in backward direction and made to meet on the same size as that of the object.
Thus, Option (D) is correct. The virtual image is always firmed in front of the lens or on the same side of the lens as of the object.
Learn More:
1. Nature of the image formed by the mirror https://brainly.com/question/11743071
2. What type of mirror do dentist use brainly.com/question/997618
3. A small bulb has a resistance of 2 ohm when cold brainly.com/question/10421964
Answer Details:
Grade: Middle School
Subject: Physics
Chapter: Lens
Keywords:
virtual, image, real, object, rays, incoming, converging, diverging, lens, back of lens, front, smaller, larger, screen, obtained.
A particular star is white. Another star that is much hotter is expected to be ______.
red
yellow
orange
blue
Answers
hope this helps :)
Blue would be my final answer
Waves 1 and 2 show different sound waves. Look carefully at the two waves. In what way do their wave characteristic differ ?
Answers
-- The amplitude of Wave-1 is greater than the amplitude of Wave-2 ...
possibly 3 or 4 times as great.
-- The wavelength of Wave-1 is longer than the wavelength of Wave-2 ...
maybe almost twice as long.
-- The frequency of Wave-2 is greater than the frequency of Wave-1 ...
maybe almost twice as frequent.
The correct answer is : D) Wave 1 has a longer wavelength and a higher amplitude than wave 2.
HOPE I HELPED!!!Thanks @AL2006
a bat experts a 120 N force on a 0.134 kg baseball for 0.04 seconds. what impolse is excerted on the bat
Answers
[tex]I = F \Delta t[/tex]
In our problem, we have a force of 120 N: F=120 N, applied to the baseball for a time of [tex]\Delta t=0.04 s[/tex]. Therefore the impulse is
[tex]I=F \Delta t = (120 N)(0.04 s)=4.8 Ns[/tex]
An embryo created by male-female reproduction has traits from _____.
A.the male only
B.the female only
C.both the male and the female
Please help I will mark as most brainliest
Answers
Hope this helped!
Which magnetic property best describes a magnet’s ability to act at a distance?
Answers
According to the Academic Honesty Policy, plagiarism is ______.
Answers
I need help fast. what is the definition of Kinetic molecular model
Answers
Which stars have the lowest absolute brightness?
Supergiants
Giants
Yellow stars
Dwarfs
Answers
Answer:
DWARFS
Explanation:
Answer:
Dwarfs
Explanation:
I got it right on my test :)
Hope this helped!~
xox
What is the frequency of a clock waveform whose period is 750 microseconds?
Answers
Determine the frequency of a clock waveform whose period is 2us or (micro) and 0.75ms
frequency (f)=1/( Time period).
Frequency of 2 us clock =1/2*10^-6 =10^6/2 =500000Hz =500 kHz.
Frequency of 0..75ms clock =1/0.75*10^-3 =10^3/0.75 =1333.33Hz =1.33kHz.
The frequency of a clock waveform whose period is 750 microseconds would be 1333.33 Hertz because the frequency is the reciprocal of the time period of the waveform.
What is the frequency?It can be defined as the number of cycles completed per second. It is represented in hertz and inversely proportional to the wavelength.
frequency of the waveform = 1 /time period of the waveform
As given in the problem we have to find the frequency of a clock waveform whose period is 750 microseconds,
Then the number of cycles per second is known as the frequency
f = 1 /( 750 ×10⁻⁶)
f =1333.33 Hertz
Thus, the frequency of a clock waveform would be 1333.33 Hertz.
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In a pulley setup that has a moving pulley, __________.
A.) you have to pull the string a greater distance, but the force needed to lift the mass is cut in half
B.)you have to pull the string a greater distance, and it takes more work to lift the mass
C.) you don't have to pull very much to lift the mass
D.)your work doubles because the pulley moves
Answers
Thus the same amount of work is required to lift the same load the same distance between pulley setups with or without a moving pulley.
As light shines from air to another medium, i = 30.0o, the light bends toward the normal and refracts at 22.0o. What is the index of refraction? n = _____
Answers
Which of the following is the best evidence that work has been done on or by an object?
Answers
The change in the energy of an object is the best evidence that work has been done on or by an object. Thus, the correct option is A.
What is Work done?
Work is done on an object or by an object whenever a force is applied on the object that moves it over a certain distance or change the energy of the object. This movement is a result of energy change.
We can calculate the energy transferred to an object, or the work done, by simply using the formula where we multiply the force by the distance moved in the direction of the force applied.
Therefore, Energy transferred = work done = force × distance moved in the direction of the force.
W = f × d
Therefore, the correct option is A.
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Please help
The wave pictured below represents a sound wave. If the distance from "A" to "B" increased, what would happen to the pitch?
Answers
It’s D. The pitch would be lower. I’m 100% sure. I just took the test. I hope this helps you!! <3
When the distance from a to b was increased, the pitch of the sound would be lower.
What is the pitch of a sound?The pitch of a sound is known to be how high or low the sound that is played is.
A high sound is known as a sound that has a high pitch and a low sound is known to be the one that has a low pitch. In the above picture, the pitch will be lowered when the distance is increased.
Learn more about pitch from
https://brainly.com/question/61859
What is an atom? what are electrons,protons,and neutrons?
Answers
In the food web shown above, which of the following organisms can be classified as a tertiary consumer?
A.
puffin
B.
jellyfish
C.
krill
D.
eiders
link:https://app106.studyisland.com/pics/200922foodweb.jpg
Answers
Here is your answer:
The proper answer to this question is option A "puffin".
Your answer is A.
If you need anymore help feel free to ask me!
Hope this helps!
Use the graph to fill in the missing temperature, salinity, and density values on the table.
Answers
Positon value to fill in
A 1.025 g/cm^3
B 34%
C 15°C
Explanation:
1) The first value to fill in is the density on position A.
The procedure is using the temperature given, i.e. 20°C, and the salinity, 35ppt, with the graph.
Place your ruler on the horizontal axis on the mark of 35% and go upward vertically until reaching the horizontal lecture of 20°C, the intersection points is on the curve of density 1.025 g/cm^3.
So, that is the density to put on the table for the position A: 1.025 g/cm^3.
2) The next value to find is the salinity on position B.
Use the temperature 25°C and the density 1.023.
Move horizontally from the vertical read of 25°C to the right until you reach the curve with 1.023 g/cm^3 density. Then move vertically downward to read the salinity which is 34%.
Fill in the blank of position B that value: 34%.
3) The final blank corresponds to the temperature on the position C.
Moving upward from the salinity 35% until the curve density = 1.026 g/cm^3, you find that the intersection is at temperature 15°C.
That is the value to put on the missing value for position C: 15°C.
A car has a mass of 1000 kg and is moving with a velocity of 10 meters/second. What is the momentum of the car?
Answers
1000*10= 10,000
The momentum of the car is 10,000
photon energy is proportional to which of the following. a. speed of light in a vacuum. B frequency of the light emitting the photon. C intensity of the light emmitting the photon. D wavelegnth of light emmitting thr photon.
Answers
Which of the following statements about the Sun is true?
Answers
The sun's size is average compared to other stars in the galaxy, and there are billions of stars in the galaxy.
Hope this helps!
I believe C is the correct choice.
~Brooke❤️
The metric unit of measurement for force is the _____.
pound
Newton
foot-pound
Newton-meter
Answers
how to find current in a series circuit
Answers
Answer: To find the current in a series circuit, you can follow these steps:
1. Identify the values of the resistors in the circuit. These values are usually given in ohms (Ω) and can be labeled with different letters or numbers.
2. Calculate the total resistance (R) of the circuit by summing the individual resistances. For a series circuit, the total resistance is simply the sum of all the resistances.
Explanation:
Example: If you have three resistors with values R1 = 10 Ω, R2 = 20 Ω, and R3 = 30 Ω, the total resistance (R) would be R = R1 + R2 + R3 = 10 Ω + 20 Ω + 30 Ω = 60 Ω.
3. Determine the total voltage (V) across the circuit. The total voltage is usually given and can be labeled as V or E.
4. Use Ohm's Law, which states that the current (I) flowing through a circuit is equal to the voltage (V) divided by the resistance (R). Mathematically, it can be expressed as I = V / R.
Example: If the total voltage (V) across the circuit is 120 volts and the total resistance (R) is 60 Ω, the current (I) flowing through the circuit would be I = V / R = 120 volts / 60 Ω = 2 amps.
So, in this example, the current in the series circuit is 2 amps. Remember to always include the appropriate units (A for amps) in your final answer.
It's important to note that in a series circuit, the current remains the same at all points in the circuit. So the value you find for the current is the same for every resistor in the circuit.
In the alpha decay of Francium-221, what daughter element is produced? (You may need to refer to the periodic table in the lesson.)
Answers
The atomic number (number of protons) of the Francium is 87, and since in the decay it loses 2 protons, the atomic number of the daughter nucleus should be 85. Looking at the periodic table ,this corresponds to Astatine, and therefore this is the element produced in the alpha decay of Francium-221.
Moreover, the mass number (number of protons+neutrons) decreases by 4 (because an alpha particle carries 2 protons+2 neutrons), therefore in the reaction the mass number will decrease from 221 to 217.
So, the daughter element is astatine-217.
217 AT
85 (i don't have enough characters so ignore this part)
why does biodiversity contribute to a habitats sustainability
Answers
In the fishbowl, the glass, water, rocks, and plastic plants are in thermal equilibrium. This situation means the temperature of the rocks is ??F. If the water is 75 degrees
Answers
Explanation :
It is given that In the fishbowl, the glass, water, rocks, and plastic plants are in thermal equilibrium. Thermal equilibrium is defined as the condition when all particles of the system are at the same temperature.
The temperature of the water is 75 degrees. So, using the concept of thermal equilibrium it is clear that the temperature of all the elements present inside fish bowl will be the same as that of water.
So, the temperature of the rocks is 75 degrees F.
The power of imagination helps a scientist to propose valid scientific explanations about the solar system use biased methods to answer questions about the solar system pose questions about the solar system which are not reasonable create theories about the solar system which are not acceptable
Answers
The power of imagination is integral to proposing scientific theories, particularly in the study of the solar system; however, these theories must be tested against experimental data to be accepted. Kepler's imaginative approach led to the formulation of laws that underpin our understanding of planetary motion, highlighting the scientific method's reliance on creativity tempered by empirical validation.
The power of imagination plays a crucial role in the scientific method, especially when it comes to understanding the solar system. Scientists use their creativity to construct theoretical models of how the universe could function and then perform experiments to see which models hold. For example, the work of Johann Kepler, who proposed the laws of planetary motion, showcases how imaginative concepts can lead to significant scientific advancements. While Kepler's models were initially based on mystical ideas, they eventually contributed to our modern understanding of celestial dynamics. Thus, the imaginative component of science allows for the proposal of new and sometimes revolutionary theories, but ultimately, it's through experimentation and data that these theories are validated or refuted.
Science thrives on new ideas and is always ready to assess the validity of different models and theories through careful experimentation. As new data come to light, scientists continuously refine their theories to reflect the most accurate understanding of the natural world. This process illustrates the dynamic and adaptive nature of scientific inquiry, which values empirical evidence overall.
which statement accurately describes what happens when ice melts in terms of energy
Answers
When it is heated, the kinetic energy of the molecules that compose it, increases, the energy that the ice received, is transformed into potential energy and the content of kinetic energy stays constant. This causes a variation in the order of the ice molecules, which have a fixed position when the matter is in solid state.
Find the angle formed by two forces of 7N and 15N respectively if its result is worth 20N
Answers
1) Take first force, say [tex]F_{1}[/tex], and assume that it is pointing towards the x-direction.
Let us take the 7N force! By keeping the above assumption in our minds, the force vector would be like:
[tex]F_{1}[/tex] = [tex]7i[/tex], where [tex]i[/tex] = Unit vector in the x-direction.
2) Take the second force, say [tex]F_{2}[/tex], and assume that it is making an angle [tex] \alpha [/tex] with the first force [tex]F_{1}[/tex].
Let us take the 15N force! By keeping the above assumption in our minds, the forces vector would be like:
[tex]F_{2} = (15*cos \alpha)i + (15*sin \alpha )j[/tex]
Now from simple vector addition, we know that,
[tex]F_{R} = F_{1} + F_{2}[/tex] --- (A)
Where [tex]F_{R}[/tex] = Resultant vector.
NOTE: In equation (A), all forces are in vector notation. Assume that there is an arrow head on top of them.
Let us find [tex]F_{1}+F_{2}[/tex] first!
[tex]F_{1}+F_{2}[/tex] = [tex]7i+(15*cos \alpha)i + (15*sin \alpha )j[/tex]
=> [tex]F_{1}+F_{2}[/tex] = [tex](7+15*cos \alpha)i + (15*sin \alpha )j[/tex]
Now the magnitude of [tex]F_{1}+F_{2}[/tex] is,
| [tex]F_{1}+F_{2}[/tex]| = [tex] \sqrt{ (7+ 15*cos \alpha)^{2} + (15*sin \alpha )^{2}}[/tex]
=> | [tex]F_{1}+F_{2}[/tex]| = [tex]\sqrt{ 49 + 225*(cos \alpha)^{2} + 210*(cos \alpha)+ 255*(sin \alpha )^{2}}[/tex]
Since [tex](sin \alpha)^{2} + (cos \alpha)^{2} = 1[/tex], therefore,
=> | [tex]F_{1}+F_{2}[/tex]| = [tex]\sqrt{ 49 + 225 + 210*(cos \alpha)}[/tex]
Since | [tex]F_{1}+F_{2}[/tex]| = |[tex]F_{R}[/tex]|, and the magnitude of the resultant force is 20N, therefore,
|[tex]F_{R}[/tex]| = | [tex]F_{1}+F_{2}[/tex]|
20 = [tex]\sqrt{ 49 + 225 + 210*(cos \alpha)}[/tex]
Take square on both sides,
400 = [tex] 49 + 225 + 210*(cos \alpha)[/tex]
[tex](cos \alpha) = \frac{3}{5} [/tex]
[tex] \alpha = 53.13^{o}[/tex]
Ans: Angle formed by the two forces, 7N and 15N, is: 53.13°
-israr