Answer:
low angle n₁ sin θ₁ = n₂ sin θ₂
critical angle sin θ₁ = [tex]\frac{n2}{n1}[/tex] θ₁ = θ_{reflected}
Explanation:
When the light ray touches the two surfaces of the refraction according to the Law of Refraction
n₁ sin θ₁ = n₂ sin θ₂
In this problem the ray goes from the material with the highest index to the lowest index, in the middle of the incident it has the subscript 1
sin θ₂ = [tex]\frac{n_1}{n_2}[/tex] sin θ₂
What
n₁/n₂> 1
in refracted ray it moves away from normal.
As the incident angle increases, a value is reached where sin θ₂ = 1, for this angle
sin θ₁ = [tex]\frac{n2}{n1}[/tex]
This angle is called critical and as the sine function cannot have values greater than 1, the ray is reflected, therefore it must comply with the law of reflection where the incident angle is equal to the reflected angle.
The Law of Conservation states that energy ____ be created of destroyed, but ___
Answer:
Law of Conservation of Energy, states that energy can neither be created nor destroyed; energy can only be transferred or changed from one form to another.
Explanation:
hope this helps
What's the net fore and gravity
Answer:
Force = Mass x Acceleration. Since the acceleration of gravity is always constant at 9.81 m/s2, the force of gravity is constant as well, according to Newton. If the object is sitting motionless on the ground, then the net force (sum of all forces) acting on it is zero
Explanation:
sorry if it doesn't help
PLEASE HELP!!! GIVING BRAINLIEST!! ill also answer questions that you have posted if you answer these correctly!!!! (77pts)
Answer:
Ex.
1. When we try cycling when we push the padel cycle starts but if we do not push the padels the cycle will stop on one position........
6. A guitar has six strings of the same length. The thickness or mass of the strings is different and each string has a different pitch and frequency. Explain why the mass of the string affects the frequency of the wave. (Hint: Think about how force, mass, and acceleration are related.)
a bit confused on this last question...
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The speed of an object in motion will _____ if the net force acting on it is opposite the direction that the object is moving.
Answer:
Decrease
Explanation:
please helpppp
Explain the difference between mass and weight and how they are measured.
There is a basic difference, because mass is the actual amount of material contained in a body and is measuredin kg, gm, etc. Whereas weight is the force exerted by the gravity on that object mg. Note that mass is independent of everything but weight is different on the earth
Mass is the matter in a material, while weight is the measure of how the force of gravity acts upon that mass.
Answer quick!!! (Edge 2021)
Haley noticed a small spot on her skin that turned out to be skin cancer. Which treatment is her doctor most likely to use?
A) Brachytherapy
B) Superficial external beam radiation therapy
C) Radiopharmaceuticals
D) High Intensity Focused Ultrasounds
The treatment most likely to use is Superficial External bean Radiation Therapy. Then the correct option is B.
What is the electromagnetic spectrum?The electromagnetic spectrum consists of the range of all types of EM radiation. Radiation is a packet of energy that travels and spreads out.
It has radio waves, infrared waves, visible light waves, ultraviolet rays, and microwaves.
They possess high energy even to penetrate deep within the material. the electromagnetic spectrum has a longer wavelength and less frequency.
Haley noticed a small spot on her skin that turned out to be skin cancer.
Surgery, radiation, chemotherapy, and hormone therapy can all be used to relieve signs and symptoms.
Medications may relieve symptoms such as pain and shortness of breath. Palliative treatment can be used.
The treatment most likely to use is Superficial External bean Radiation Therapy.
Then the correct option is B.
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How is it that even light precipitation can still cause the collection of large amounts of water.
Answer:
the heat of the light.
Explanation:
no matter the light, there's always heat being produced from it. and heat makes liuqid rise
PLEASE HELP QUICK! I'LL GIVE BRAINLIEST RIGHT AWAY IF RIGHT.
why do we use a circuit breaker ?
Answer:to protect an electrical circuit from damage caused by excess current from an overload or short circuit.
Explanation:
PLEASE HELP!!! GIVING BRAINLIEST!! ill also answer questions that you have posted if you answer this correctly!!!! (40pts)
Answer:
Distance
Explanation:
If i'm wrong then eXcUsE mE :')
A 15 kg dog sits at the top of a hill. If the dog possesses 600 J of potential energy,
what is the height of the hill?
Answer:
4.08m
Explanation:
h = PE/mg
h = 600/(15)(9.8)
h = 600/147
h = 4.08m
PLEASE HELP!!! GIVING BRAINLIEST!! ill also answer questions that you have posted if you answer these correctly!!!! (40pts)
friction make non moving objects starts to move
truethere are different types of force which may help them to move
Electric charge can be built up on what material in the form of static electricity?
A. insulators
B. conductors
C. Semiconductors
D.Superconductors
In an experiment, some magnesium ribbon is weighed and its mass is recorded. It is then placed in a crucible and heated. Once hot
enough, it combines with oxygen to form magnesium oxide (Mgo). Observe the data table provided. Explain why the law of
conservation of mass appears violated.
les -
A)
The mass of the magnesium oxide was not calculated correctly.
B)
The mass of the oxygen does not equal the other two substances.
C)
The masses of the products and reactants look like they are equal.
D)
The mass of the magnesium oxide does not add up to the oxygen and
magnesium
Answer:
D. The mass of the magnesium oxide does not add up to the oxygen and magnesium.
Explanation:
The oxygen and magnesium should match the Magnesium Oxide.
Answer:
i agree the answer is (D)The mass of the magnesium oxide does not add up to the oxygen and magnesium
6. Which of the following best describes the situation?
Answer:
D
Explanation:
the man is pull the box that is the force and the box rubbing against the ground causes friction
A ball has 2 kg*m/s of momentum when thrown with a velocity of 8 m/s outwards. Find the mass of the ball.
Answer:
As, we know momentum = mass × velocity that is p = mv
we have momentum (p) = 2 kg m/s
and velocity (v) = 8 m/s
so substitute values in p=mv
2 kg m/s = m × 8 m / s
m = 2 / 8 kg = 0.25 kg
Therefore, mass of substance is 0.25 kg.
2/8 in fractional form.....
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What is a disadvantage of using biomass as an energy resource?
A. Biomass produces a less efficient fuel
B. Biomass is available almost everywhere
C. Biomass is a renewable energy resource
D. Biomass releases less harmful emission gases
Answer:
hope this helps i think the answer is C
Answer:
it is A) biomass produces a less efficent fuel
Explanation:
the rest are advantages
Which is not a step in the scientific method?
a. Problem or question
b. Ask other people for their opinion
O c. Formulate a hypothesis
O d. Arrive At a conclusion
HURRY PLEASE
Answer:
Umm I'm pretty sure is all of the above
name the instrument made on the basis of expansion of heat
Answer:
The instrument is thermometer
what is more reactive calcium or strontium?
Answer:
Calcium is less reactive than strontium.
hope it helps
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What is the best prediction for what will happen when all of the hydrogen in the sun has undergone fusion?
Helium nuclei will split to form hydrogen and the sun will no longer release energy.
Helium nuclei will split to form hydrogen and the sun will continue to release energy.
Helium nuclei will fuse to create heavier elements but the sun will no longer release energy.
Helium nuclei will fuse to crazy heavier elements and the sun will confuse to release energy.
Answer:
Helium nuclei will split to form hydrogen and the sun will no longer release energy.
Explanation:
:)
When all the hydrogen in the sun has gone for fusion, helium nuclei will split to form hydrogen and the sun will continue to release energy.
What is nuclear fusion?The term nuclear fusion has to do with the combination of two or more nuclei to obtain a larger nuclei with the emission of a tremendous amount of energy.
Hence, when all the hydrogen in the sun has gone for fusion, helium nuclei will split to form hydrogen and the sun will continue to release energy.
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1.Two materials that can be scratched by an iron mail are ___, ___
2.What is the substance that can be scratched by an iron nail but not a penny?
Please answer
Answer:
1. Two materials that can be scratched by an iron nail are zinc and aluminum
2. A substance that can be scratched by an iron nail but not a penny is;
Nickel
Explanation:
The hardness of a material can be defined as its ability to resist being plastically deformed at a location due to mechanical scratching, abrasion or indentation
The Mohs hardness scale provides a ranking of materials in the order of hardness with a material having a higher Mohs hardness number being able to scratch other materials which have a lower Mohs hardness number
1. From the Mohs scale of hardness, iron which has an harness number of 4.5 can scratch zinc which has an harness number of 2.5, and iron can also scratch aluminum which has an hardness number of 2.5 to 3
2. A penny is made from copper plated material and will have an outer layer hardness of copper which has an hardness number of 3 on the Mohs scale
Therefore, a penny cannot scratch a material mode of nickel which has an hardness number of 4, while iron which has an hardness of 4.5 will scratch a nickel material
(1) Zinc and aluminum can be scratched by an iron nail.
(2) Nickel can be scratched by an iron nail but not a penny.
Hardness and deformation:The hardness of a material is defined as its ability to resist deformation due to mechanical scratching, abrasion, or indentation.
According to the Mohs hardness scale, a material having a higher Mohs hardness number is able to scratch other materials which have a lower Mohs hardness number.
From the Mohs scale of hardness, iron has a hardness number of 4.5, zinc has a hardness number of 2.5, and aluminum which has a hardness number between 2.5 to 3. So, iron can scratch both, Zinc and Aluminium.
A penny is made from copper-plated material copper has a hardness number of 3 on the Mohs scale. Whereas Nickel has a hardness number of 4. Therefore, a penny cannot scratch a material made of Nickel.
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what energy source would be the most cost efficient and have the smallest impact on the climate? evidence?
Answer: Solar energy and wind energy both can be used
Explanation: Solar energy as well as wind energy would be the most preferable energy source for this community.
Solar energy is the energy that is directly derived from the sun and can be transformed into electrical energy. For example, the use of solar panels.
Wind energy is obtained by the natural agent known as wind. In the region where the wind is high, the turbines moves very fast, thereby generating electricity. For example, wind mill.
Thus this two energy sources are less costly and have lesser environmental impacts and they are very precise and is currently rising in the faster rate and with innovative technical upgradation.
True or False: A tree is an example of an object that contains chemical energy. help!! Please!! True False
Answer:
Is a tree an example of chemical energy?
Take, for example, an apple tree. The tree absorbs light energy from sunlight, converting the light energy into chemical potential energy stored in chemical bonds. The tree uses this energy to build leaves and branches and fruit. ... Then it takes that heat and converts it into motion, or kinetic energy
Explanation:
Can someone help me please? :/
Regular eclipses of the Sun and the Moon are best explained by which of the following?
1: The movement of Earth and the Moon around the Sun
2: The relative masses of the Sun, Earth, and the Moon
3: The different compositions of the Sun and the Moon
4: The rotation of Earth and the Moon on their axes
if a circuit has three batteries each would 3 volts how much total voltage is it in the circuit?
how to use a circuit breaker
?
Answer:
circuit breakers work in a similar way to fuses, and also protect the circuit from damage if too much current flows but work in a different way. when circuit breakers detect a surge in current in a circuit, they break the circuit by opening a switch. one type of circuit breaker used instead of a fuse and an earth wire is a Residual Current Circuit Breaker (RCCB)
Two forces,one of 12 N and another of 24 N,act on a body in such a way that they make an angle of 90degree with each other.Find the resultant of the two forces
Answer:
26.83 N.
Explanation:
If the angle between two vector is 90°, to get the resultant, we use Pythagoras theorem.
a² = b²+c²......................... Equation 1
Where a = R = Resultant, b = 12 N, c = 24 N.
Substitute these values into equation 1
R² = 12²+24²
R² = 144+576
R² = 720
√R² = √720
R = 26.83 N.
Hence, the result of the two force is 26.83 N.
Does this graph represent constant or changing speed? How do you know? Find the average speed