The statement 'the index of refraction of the second medium is higher' is TRUE for light passing into a second medium that is more optically dense than the first medium.
The refraction index of an object is a measurement that indicates how fast light can travel through this object.The refraction index of a given material/substance can be estimated as the velocity of light of a given wavelength divided by this velocity.The higher the refraction index of an object, the closer to the expected direction the light will travel.In conclusion, the statement 'the index of refraction of the second medium is higher' is TRUE for light passing into a second medium that is more optically dense than the first medium.
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Final answer:
The correct statement is that when light passes into a medium that is more optically dense than the first medium, the index of refraction of the second medium is higher.
Explanation:
When light passes into a medium that is more optically dense than the first medium, the index of refraction of the second medium is higher. This is because a higher index of refraction indicates a more optically dense medium. Consequently, the light ray bends towards the normal -- a line perpendicular to the interface of the two media -- when transitioning from a less optically dense medium to a more optically dense one.
which parts of an electric generator are connected
Answer:
https://brainly.com/question/10256321
Answer:
the armature and commutator
Explanation:
what can you infer about fossil fuels from their name
Answer:
Fossil fuels come from the ground and are millions of years old
Explanation:
Fossil fuels come from the ground. i can infer and tell because most fossils are in the ground and also fossils are millions of years old. Fossil fuels are hydrocarbons, primarily coal, fuel oil or natural gas, and is from the remains of dead plants and animals. In dialogue, the term fossil fuel also includes hydrocarbon-containing natural resources that are not derived from animal or plant sources.
5. What two factors can increase the force of air resistance for an object?
Answer:
The two most common factors that determine the air resistance are the speed of the object and its cross-sectional area. Greater speed causes greater air resistance, and increased area increases air resistance as well. It also depends on an object's shape.
hii i need answers for this question. this is due today and i need it asap!! **will give brainlist**
Answer:
Explanation:
the bit the most kinetic energy is where it is going down
the bit with the most potential is the curb
The places with the most potential are the places at the highest points of the track (i.e., right behind where the coaster is situated, and towards the end of the loop). These places have the highest stored energy, that can be used.
The places with the most kinetic is where the low points of the track is at. In this case, it will be where the coaster is situated, and the latter half of the loop.
Explain Einstein's General Relativity Theory.
Answer:
The general theory of relativity (or general relativity for short) is a major building block of modern physics. It explains gravity based on the way space can 'curve', or, to put it more accurately, it associates the force of gravity with the changing geometry of space-time.
Sound waves are longitudinal waves. The height or intensity of the wave shows it's amplitude or the energy in the wave. In the diagram of a sound wave, the section labeled D shows the area of the sound wave with the
A) most amplitude and most compression.
B) most amplitude and most rarefaction.
C) least amplitude and most compression.
D) least amplitude and most rarefaction.
Answer:
most amplitude and compression .
Explanation:
The pitch of a sound wave is related to wrich property?
A Wavelength
B. Amplitude
C. Volume
D . Frequency
Answer:
Frequency
Explanation:
What is the magnitude of the electric field at a point 0.0050 m from a 0.0040
C charge?
Use E = kg and k = 9.00 x 10°N.m/c?
A. 1.4 x 1072 N
B. 2.8 1012 N
C. 1.1 x 1010 N
D. 7.2×10°N
Answer:
A. 1.4 * 10^(12) N/C
Explanation:
Parameters given:
Distance of charge from electric field, r = 0.0050 m
Charge, q = 0.0040 C
The electric field at a point, r, away from a charge, q, is given as:
E = (k * q) / r²
Where k = Coulomb's constant
E = (9 * 10^9 * 0.004) / (0.005²)
E = 1440 * 10^9 = 1.4 * 10^(12) N/C
The magnitude of the electric field at a point 0.005 m from the charge is 1.4 * 10^(12) N/C.
Answer:
Explanation:
Given that,
A charge Q = 0.004 C
We want to find the electric field at distance r = 0.005m
K = 9 × 10^9 Nm²/C²
Electric field at a point is given as
E = kQ / r²
E = 9 × 10^9 × 0.004 / 0.005²
E = 1.44 × 10¹² N/C
So, the magnitude of the electric field at 0.005m is 1.44 × 10¹² N/C.
11. Which of the following forces is a contact force? *
A. Gravity
B. Friction
C. Magnetism
D. Electricity
Answer:
B
Explanation:
Gravity is an invisible force, and so is magnetism and electricity. Friction involves the rubbing of things together to create energy.
Answer:
B
Explanation:
Friction is the force that you feel whenever you try to drag an object across a surface. Like a box along the floor, or your hand across a counter-top. It requires two objects to be in direct contact with each other (don't worry about air friction AKA "drag").
A 500 kg empty elevator moves with a downwards acceleration of 2 m/s2. What is the tension force of the cable on the elevator? 5000 N 4000 N 6000 N 1000 N
Answer:
T = 4000 N
Explanation:
We have,
Mass of an elevator, m = 500 kg
It is moving downward with an acceleration of [tex]2\ m/s^2[/tex]. It is required to find the tension force of the cable on the elevator. We know that when the elevator is moving downward, the net force on it is given by :
[tex]F=m(g-a)[/tex]
g is acceleration due to gravity
[tex]F=500\times (10-2)\\\\F=4000\ N[/tex]
So, the tension force of the cable on the elevator is 4000 N.
Which compound should require the highest temperature to melt? LiF, NaF, LiCl, NaCl
Answer: lif
Explanation:
lif is the answer i checked it and the person above is one hundred percent wrong. lif is the right answer.
Ingrid is moving a box from the ground into the back of a truck. She uses 20 N of force to move the box 5 meters. If she uses an inclined plane to reduce her force to 10 N which of the following statements will be true?
A. She will decrease the amount of work done.
B. She will make her work efficiency 100 percent.
C. She will increase the distance the box moves.
D. All of the above.
Answer:
C
Explanation:
Calculate the mass in kg of an object that weighs 1,225 N on earth
To calculate the mass of an object that weighs 1,225 N on Earth, divide the weight by the acceleration due to gravity (9.80 m/s²). The mass is equal to 125 kg.
Explanation:To calculate the mass of an object that weighs 1,225 N on Earth, we can use the equation w = mg, where w is the weight, m is the mass, and g is the acceleration due to gravity (9.80 m/s² on Earth).
Rearranging the equation, we have m = w/g. Substituting the given values, m = 1,225 N / 9.80 m/s² = 125 kg.
Therefore, the mass of the object is 125 kg.
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pls help asap
What is the mechanical advantage of this pulley system?
A. 1/2
B. 1
C. 2
D. 3
Answer:
D
Explanation:
i took lots of time on the lesson
PLEASE HELP BRAINLIEST!!! 15 MIN!!!
A current can be produced in a coil of wire _____.
a.as a core of iron is being thrust through the coil
b.when a magnet rests in the coil
c.when a core of iron rests in the coil
d.as a magnet is being thrust through the coil
D.
A current can be produced in a coil of wire as a magnet is being thrust though the coil.
Brainliest, please?
Waves move faster in..
A) low-temperature gasses.
B) low-temperature solids.
C) high-temperature gases.
D) high-temperature solids.
HELP ASAPPP PLZZZ I HAVE A TIMER WILL GIVE YOU THE 30 POINTS
Explain why decomposition use solar energy?
Answer: Decomposition uses solar energy because for hydrogen and oxygen.
Explanation:
A light bulb is connected to a 2V supply and experiences a current of 6.4A. What is the power rating of the bulb?
Answer:
12.8 Watts
Explanation:
P = VI
P = (2 V) (6.4 A)
P = 12.8 W
The power rating of the bulb will be 12.8 Watts. Power rating is an efficiency perameter.
What is the power rating?The maximum power input allowed to pass through a piece of equipment is known as the equipment's power rating.
The given data in the problem is;
V is the voltage supply= 2V s
I is the current = 6.4A.
P is the power rating of the bulb =?
The power rating of the bulb is found as;
[tex]\rm P = VI \\\\ \rm P = 2 \times 6.4 \\\\ \rm P =12.8 \ Watt[/tex]
Hence the power rating of the bulb will be 12.8 Watts.
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Which sound wave features are being described?
Number of wavelengths
----------------------------------- : ⇒ Frequency
Time
Distance traveled
-------------------------- : ⇒ Speed
Time
Some features of sound wave that describes the motion of the sound wave include wavelength, speed and frequency.
Features of sound wave
There are several features of sound wave that decribes the motion of the sound wave and some of the features include;
Wavelength: This is the distance traveled by the sound waveFrequency: This the number of cycles per unit time made by the sound waveSpeed: This is the rate of change of distance with time of motion of the wave.Learn more about sound wave here: https://brainly.com/question/1199084
How much work is done by gravity when a pine cone (of mass 50g) falls from the top of a tree, 9 m high?
4.5 Joules. I think it'd be 4.41, but when you round it, it's 4.5.
Final answer:
The work done by gravity on a 50g pine cone falling from a 9 m high tree is 4.41 Joules, as calculated using the gravitational potential energy formula.
Explanation:
The amount of work done by gravity on a falling object is equal to the change in the object's gravitational potential energy (GPE). The GPE formula is GPE = 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 in meters. For a pine cone with a mass of 50g (which is 0.05 kg) falling from a height of 9 m, the work done by gravity is:
GPE = mgh = (0.05 kg) x (9.8 m/s²) x (9 m) = 4.41 Joules
Thus, 4.41 Joules of work is done by gravity when the pine cone falls from the top of a 9 m high tree.
What is your volume of the object?
30 cm3
35 cm3
42 cm3
54 cm3
Which of the following statements is true concerning mechanical waves and electromagnetic waves?
A
Both electromagnetic waves and mechanical waves require a medium to travel through.
B
Mechanical waves require a medium to travel through; electromagnetic waves do not.
C
Electromagnetic waves require a medium to travel through; mechanical waves do not.
D
Neither electromagnetic waves nor mechanical waves require a medium to travel through.
Answer:
B
Explanation:
Electromagnetic spectrum includes visible light which we see all the time reflecting off objects to give them colours, mechanical waves like sound require something to move in, its the reason why people say you can't scream in space because space is a giant vacuum. No not the kind you use to clean up the mess you made from breakfast. The kind that has no air. So sound can be heard on earth as it is not a vacuum, air moves freely and transfers sounds vibrations all around you to be absorbed by walls and other stuff in comes in contact with.
Extra information:
Sound travels further in water because the molecules are closer together meaning that transferring the energy is easier. This is how Blue wales can communicate from hundreds of miles away.
Which statement best summarizes Newton's law of action-reaction? *
Friction slows objects.
All forces act in pairs.
Force equals mass times acceleration.
O
An object in motion tends to stay in motion.
Answer:
The correct answer is the third
Force equals mass times acceleration
Explanation:
Newton's second law says that force equals mass times the acceleration of the body
F = m a
This is the most used way to solve problems
The correct answer is the third
Newton's third law states that forces always work in pairs, by action and reaction
Newton's first law states that an object per macerate with constant speed unless some force modifies this state.
What is the mass of an object that is hanging 12.6 m above the surface of the earth and has a gpe of 2778.3 J
To find the mass of an object hanging 12.6 m above the surface of the earth is approximately 22.04 kg.
Explanation:The mass of an object can be determined using the formula for gravitational potential energy (G.P.E). G.P.E. is calculated using the formula G.P.E. = mgh, where m is the mass in kg, g is the acceleration due to gravity which is approximately 10 m/s², and h is the height in meters.
To find the mass, rearrange the formula to: m = G.P.E. / (g * h).
Substituting the given values into the formula, we have m = 2778.3 J / (10 m/s² * 12.6 m). Solving this equation gives us the mass of the object.
Calculating the mass, m
= 2778.3 J / (10 m/s² * 12.6 m)
m ≈ 22.04 kg
What do we call the substances that react together (break/form chemical bonds) to form new substances?
A)reactants
B)products
C)none of the answers are correct
D)catalysts
Answer: A) reactants
Explanation:
Reactants are the substances that have chemical reactions when they are combined, whereas the product is what comes from the reactants’ chemical reactions.
Answer:
A)reactants
Explanation:
I think the correct answer is reactants because the substances that go into a chemical reaction are called reactants.
Sorry if it's wrong:(
Help me asap its due today
Answer:
[tex]3.54* 10^{22}[/tex] N
Explanation:
Using the formula you gave:
[tex]F_g = \frac{6.67*10^{-11}*2.0*10^{30}*5.97^{24} }{(1.5*10^{11})^2 }[/tex]
If you wanted to soundproof a room what insulator would you use
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:
can a magnet ever have a single pole
Answer:
no
In particle physics, a magnetic monopole is a hypothetical elementary particle that is an isolated magnet with only one magnetic pole (a north pole without a south pole or vice versa). A magnetic monopole would have a net "magnetic charge".
How does reverberation explain why your voice sounds different in a gym than it does in your living room
Reverberation is why your voice sounds different in a gym compared to a living room; hard surfaces in a gym increase reverberation time, creating echoes that can make sound seem mushy, while softer surfaces in a living room shorten it, providing clearer sound quality.
Reverberation explains why your voice sounds different in a gym compared to your living room due to the unique acoustic properties of different environments. In a gymnasium, the hard surfaces result in a longer reverberation time as sound waves bounce off and overlap each other, creating what is known as the comb effect. This often leads to mushy or muddled musical sounds and makes speech more difficult to understand due to the multiple echoes. Conversely, a living room typically has softer surfaces and objects that absorb sound, resulting in shorter reverberation times and a clearer, more intimate sound quality.
Reverberation provides us with clues about the size of a space and its material composition, affecting our perception of sound. For instance, large concert halls are designed with optimal reverberation times to enhance music, while spaces intended for speech, like lecture halls, aim for shorter reverberation to maintain speech clarity. Adjusting the level of reverberation can also add fullness to recorded voices or create the illusion of a different performance space.