Answer:
The branch of mechanics deals with the mathematical description of the motion and interaction of subatomic particles, incorporating the concepts of quantization of energy, wave–particle duality, the uncertainty principle, and the correspondence principle is Quantum Mechanics.
Answer:
Explanation:
Quantum Mechanics is a branch of physics that deals with sub-atomic particles and their energy states. Its theory says at subatomic level, energy exists in discrete levels as "quanta" and particles behave as waves.
Which type of electromagnetic radiation is used in cancer treatment?
A. X-rays
B. Visible light
C. Gamma rays
D. Infrared radiation
Answer:
C. Gamma Rays
Explanation:
A P E X
Answer:
C. Gamma rays
Explanation:
got it right
Concept Development
Practice Page
20-1
Gases
1. A principle difference between a liquid and a gas is that when a liquid is under pressure, its
volume
(increases) (decreases) (doesn't change noticeably)
PHYSICS
and its density
SIGHS
(increases) (decreases) (doesn't change noticeably)
When a gas is under pressure, its volume
(increases) (decreases) (doesn't change noticeably)
and its density
(increases) (decreases) (doesn't change noticeably)
1
2. The sketch shows the launching of a weather balloon
at sea level. Make a sketch of the same weather balloon 1
when it is high in the atmosphere. In words, what is
different about its size and why?
1
1
Answer:
The answer is below
Explanation:
The main difference between a liquid and a gas is that when a liquid is under pressure, its volume "won't change apparently. The reason is that the distance between the molecules of a liquid is relatively small, and the molecules of a liquid extensively withstand the compressive forces. This is similar to the distance between the molecules of a solid."
2. 38( C of charge move between the terminals of a battery with a potential difference of 9.00 V. How much energy does it gain? (Unit = J)
Answer:
Energy = 21.42 Joules
Explanation:
Given the following data;
Charge = 2.38 C
Potential difference, v = 9 V
To find the energy gained;
Mathematically, it is given by the formula;
Energy = charge * potential difference
E = 2.38 * 9
E = 2.38 * 9
E = 21.42 Joules
Answer:
21.42
Explanation:
Acellus
Warming up and cooling down should be dond before and after
Answer:
while changing the temperature
A small car and a large bus have the same kinetic energy, which is traveling faster?
a.) car
c.) same speed?
b.) bus
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Spring 1 has a small spring constant and spring 2 has a large spring constant. Which spring will stretch further when 100 g is added to them?
1
2
yeah it definitely 2 .:) :)
Which is a benefit of a scientific model?
A.) It provides a complete image of the concept it is modeling.
B.) It provides an accurate scale of the concept it is modeling.
C.) It provides an accurate visual representation of the texture and coloring of the concept it is modeling.
D.) It provides a useful understanding of the concept it is modeling.
A wave is moving at 300m/s and has a frequency of 25Hz, what is the wavelength?
Answer:
12 metre
Explanation:
Wavelength = Velocity / Frequency
Wavelength = 300m/s / 25 Hz
Wavelength = 12 metre
Which weather event is most likely to occur if there are warmer than average ocean waters in the Pacific? Group of answer choices Flooding in the southern United States due to El Niño Wet conditions in the Pacific Northwest due to El Niño Weak trade winds due to La Niña Drought in the southern United States due to La Niña
Answer:
Flooding in the southern United States due to El Nino
Explanation:
An El Nino is said to be taking place during the period of a rise in the temperature of the water at the equatorial Pacific above average combined with a weaker than normal east winds.
The opposite condition is La Nina
The effects of an El Nino includes an higher amount of rainfall and can sometimes cause destructive flooding which is observed in the Southern United States from during the fall through spring
The weather that is most likely to occur if there are warmer than average ocean waters in the pacific is flooding due to El Nino in the southern United States.
when you hear sounds made by a speaker, it is because air molecules have moved from the speaker to the ear
TRUE OR FALSE
A ball is released from a height of 20 metres. Calculate; 1. The time it takes to fall 2. The velocity with which it hits the ground
Answer:
Final velocity of ball = 20 m/s
Explanation:
Given:
Height when ball released = 20meter
Find;
Time taken to fall
Final velocity of ball
Computation:
Initial velocity of ball = 0 m/s
Acceleration due to gravity = 10 m/s²
Using equation of motion;
S = ut + (1/2)(g)(t²)
20 = (0)(t) + (1/2)(10)(t²)
20 = 5(t²)
(t²) = 20 / 5
(t²) = 4
Time taken to fall = 2 second
V = u + at
V = 0 + (10)(2)
Final velocity of ball = 20 m/s
Charlie Brown kicks a football at 20.5 m/s at 31.0 degrees. It lands on flat ground 2.15s later
Answer:
distance, x = 38.17 m
Given:
velocity of the football, v = 20.5 m/s
football projected at an angle,
Period of flight, T = 2.15 s
Therefore, the distance covered by the football, x is given by:
Hope this helps! Have a great day/night!
Revise this statement to make it true: Only winter is caused by the tilt of the earth's axis.
Answer:
Only winter is caused by the tilt of the earth's axis.False
it caused summer or autumn too
Pulling a boat forward into a docking area requires 157J of work. The boat must be pulled a distance of 5.3m. What is the force with which the boat is pulled?
Answer:
29.62 N.
Explanation:
Work = 157 J
Distance = 5.3 m
Force = ?
Work = Force * Distance
157J = Force * 5.3 m
157 J/ 5.3 m = Force
29.62 N = Force (or) Force =29.62 N
How do I solve this problems
What are the reasons for the establishment of UGA?
Answer:
In February 1784, just after the close of the Revolutionary War, the General Assembly of Georgia earmarked 40,000 acres of land to endow "a college or seminary of learning." The following year, Abraham Baldwin, a lawyer and minister educated at Yale University in New Haven, Connecticut, who had settled in Georgia
Explanation:
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What is the relationship between an electromagnetic wave and the vibrations of the electric and magnetic fields it moves through?
O A. The vibrations of the fields move in a direction opposite to that of the wave.
O B. The vibrations of the fields are in the same direction but perpendicular to the motion of the wave.
O C. The vibrations of the fields are perpendicular to the direction of motion of the wave.
OD. The vibrations of the fields and wave motion are parallel to each other.
Answer:
c
Explanation:
The correct statement is: "The vibrations of the fields are perpendicular to the direction of motion of the wave."
To find the correct statement among all the options, we need to know more about the Electromagnetic wave.
What is electromagnetic wave?
Electromagnetic wave is a combination of electric field and magnetic field. It's a transverse wave and travels at the speed of light.How does the electromagnetic wave travel?
In the electromagnetic wave, both the electric field and magnetic field travel perpendicular to each other i.e. the vibration of both the fields are perpendicular to each other as well as perpendicular to the direction of propagation.Thus we can conclude that the option (C) is correct.
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Who can help me do some 8th grade Science if so i will mark you the brainliest and also no links
Answer:
yes I help what is the question
PLS HELP:)
If the incident angle of a light ray is 30 degrees to the normal, what will the reflected angle be?
Which of the following descriptions apply to the Milky Way galaxy
How does the intensity of light change for a location depending on the season?
Answer:
The intensity of light can change with the time of the day, season, geographic location, distance from the equator, and weather. It gradually increases from sunrise to the middle of the day and then gradually decreases toward sunset; it is high during summer, moderate in spring and fall, and low during winter time.
Explanation:
translational movement with the tilt of the earth's axis we can explain the change in intensity that an area receives determined with the weather station.
In summer the axis points to the sun, which is why more intensity per unit area arrives. In winter the axis moves away from the sun intensity per unit area is less
The intensity of the radiation is defined by the relationship between the power on the irradiated surface
I = P / A
where I is the intensity, P is the power emitted by the sun and A is the area.
The intensity of the radiation that reaches it is around 1400 W / m² in the upper part of the Earth's atmosphere, this amount varies slightly when the planet passes from its furthest point from the sun to its closest point, that is, perihelion to aphelion.
The most important variation of this intensity is due to the fact that it has its axis inclined and the normal to the area changes in relation to the incident radiation during the translational movement around the sun.
In the summer the axis of the earth is inclined towards the sun, so the rays fall more perpendicularly, therefore their absorption over the area is maximum and the temperature rises.
In winter, the earth's axis is tilted away from the sun, so the rays they carry are distributed over a larger surface area and therefore less energy is absorbed per unit area and the temperature decreases.
In the spring and autumn seasons, the Earth's axis is almost vertical, so the absorption is intermediate and the temperature of the Earth is between the two maximums.
Using an analysis of the translational movement with the inclination of the earth's axis, we can explain the change in intensity received by an area determined with the weather station.
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What is the difference between heat and temperature?
Heat is caused by the sun, and temperature is caused by conditions in the atmosphere.
Heat is measured in calories, and temperature is measured in joules.
Temperature measures the motion of molecules, and heat is the energy of that motion.
Temperature is measured by a thermometer, and heat is measured by a barometer.
Answer:
Temperature measures the motion of molecules, and heat is the energy of that motion.
Explanation:
Answer:
Temperature measures the motion of molecules, and heat is the energy of that motion.
Explanation:
A. Which law is being demonstrated?
Answer:
There is no law being shown for us to see.
Explanation:
Can you attach something for us to see?
What is the frequency of a wave traveling at 10 m/s with a wavelength of 2 m?
Answer:
5 Hz
Explanation:
Given:
Wave velocity ( v ) = 10 m / sec
wavelength ( λ ) = 2 m
We have to calculate Frequency ( f ) :
We know:
v = λ / t [ f = 1 / t ]
v = λ f
= > f = v / λ
Putting values here we get:
= > f = 10 / 2 Hz
= > f = 5 Hz
Hence, frequency of sound is 5 Hz.
1) DeAnna, with a mass of 60.0 kg, climbs 3.5 m up a gymnasium rope. How much energy does
a system containing DeAnna and Earth gain from this climb?
2) An electric motor develops 65 kW of power as it lifts a loaded elevator 17.5 m in 35 s. How
much force does the motor exert?
3) A 25.0-kg shell is shot from a cannon at Earth’s surface. The reference level is Earth’s surface.
a. What is the shell-Earth system’s gravitational potential energy when the shell’s height is
425 m?
b. What is the change in the system's potential energy when the shell falls to a height of 225
m?
4) Shawn and his bike have a combined mass of 45.0 kg. Shawn rides his bike 1.80 km in 10.0
min at a constant velocity. What is the system's kinetic energy?
5) Mary weighs 505 N. She walks down a 5.50-m-high flight of stairs. What is the change in the
potential energy of the Mary-Earth system?
6) Katia and Angela each have a mass of 45 kg and are moving together with a speed of 10.0
m/s.
a. What is their combined kinetic energy.
b. What is the ratio of their combined mass to Katia’s mass?
c. What is the ratio of their combined kinetic energy to Katia’s kinetic energy? Explain how
this ratio relates to the ratio of their masses.
7) A 10.0-kg test rocket is fired vertically. When the engine stops firing, the rocket’s kinetic
energy is 1960 J. After the fuel is burned, to what additional height will the rocket rise?
1. As he climbs... He's gaining potential Energy.
PE=mgh = 60x9.8x3.5=2058J. This is the potential Energy gain.
2. Power = Workdone/Time.
65kW=65,000watts
65000=Workdone/35
Workdone=65,000 x 35=2,275,000J
Recall... Workdone=Force x Distance
given distance =17.5m
Force =Workdone/distance
=2,275,000/17.5
Force=130,000N or 130kN.
3.Potential Energy Increases or decreases as height increases or decreases respectively.
a) PE=mgh =25x9.8x425=104,125J.
b) change in PE=mg(h°-h) =25 x 9.8(225-425)
= -49000J. The Energy is negative because the system loses 49000J.
4. At Constant velocity; d=vt
where d=distance,v=velocity, t=time
v=d/t
1.8km=1800m
10min =10x60=600seconds
v=1800/600
v=3ms-¹
KE=1/2Mv²
=1/2 x 45 x 3² =202.5J.
5.Mary weighs 505N.
Weight=Mass x acceleration due to gravity
W=mg
505=m x 9.8
m=505/9.8 =51.53kg.
Since Mary is coming down... she's decreasing her potential energy cos Potential Energy Decreases as you decrease your height. So Her Initial height was 5.5m... she alighted to the ground which we'll say is the ground(h=0)
Change in PE=mg(h°-h)=51.53 x 9.8(0-5.5) = -2777.5J.
This energy is negative because she lost potential Energy.
6. Since each has a Mass of 45kg... and they're moving together.... Their combined Mass =45+45=90kg.
Velocity given as =10ms-¹
a)Combined KE=1/2MV² = 1/2 x 90 x 10² =4500J.
b)Ratio of combined Mass to Katias mass = CM/KM
Where CM=Combined Mass
KM=Katia's mass
=90/45 =2:1
c) Katia's kinetic E =1/2 x 45 x 10² =2250J.
Ratio of combined to Katia's = CK/KK
CK=Combiner Kinetic Energy
KK=Katia's kinetic energy
= 4500/2250 =2:1.
This answer should be the same cause from the Formula KE=1/2mv²
KInetic Energy varies Directly with Mass
so If the ratio of Masses is 2:1... That of KE should be the same because of their direct Relationship✌.
7.The height at which the Rocket Engine stops is not how far it went. Theres a Minute height that it'll still go before it starts going back down.
from the question... The energy when the engine stops is 1960J
PE=mgh
1960=10x9.8xh
h=1960/98 =20m.
The engine stops at this height
but The additional Minute height that was added before itll start falling cant be calculated from the insufficient info given in this question. If we had the Energy at the additional height-added... We can calculate that height and then subtract 20 from it. That will give the additional added height.
Thats pretty Much Everything✌
Spectro... Out
The energy in the system containing DeAnna and Earth gain from this climb will be 2058J.
How to calculate the energy?From the information, DeAnna, with a mass of 60.0 kg, climbs 3.5 m up a gymnasium rope. The potential energy will be:
= mgh
= 60 × 9.8 × 3.5
= 2058J
When an electric motor develops 65 kW of power as it lifts a loaded elevator 17.5 m in 35s, the force that the motor exerts will be:
= Work done / Time
= 2275000/17.5
= 130000N
The shell-Earth system’s gravitational potential energy when the shell’s height is 425m will be:
= mgh
= 25 × 9.8 × 425
= 104125J
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Why is the use of an international system of measurement important for science?
Answer:
To avoid confusion when measuring, scientists use a shared system of measurement, called the International System of Units (SI). A common measurement system allows us to make direct comparisons instead of having to know things like how much a certain animal weighs.
Explanation:
why do plants on the floor of a rainforest often have reddish-colored leafs?
A, to help absorb as much sunlight as possible.
B, to camouflage themselves from predators.
C, to attract pollinators
D, To warn animals that the leaves are poisonous.
PLEASE HELP BY TODAY THANKS :)
Answer:
c i hope this helps
Explanation:
can someone mark the brainliest?
Answer:
I think I can have a good day
Answer:
What do you mean by your question?
refractive index of water is 1.3. calculate the speed of light in water.
Answer:
The speed of light is faster in water. The Refractive index of water is 1.3 and the refractive index of glass is 1.5. From the equation n = c/v, we know that the refractive index of a medium is inversely proportional to the velocity of light in that medium. Hence, light travels faster in water.
Answer:
[tex]2.31*10^{8} m/s[/tex]
Explanation:
Employ the formula attached below,
n = c/v
1.3 = (3.0*10^8)/ x
(solve for x)
x= (3.0*10^8) / 1.3
x= [tex]2.31*10^{8} m/s[/tex]
Why would African Americans like the song "Respect"?
A. It represented African Americans and their struggle for equality.
B. It represented African Americans and their success in achieving
equality.
C. It represented African Americans and their fight for African
independence.
D. It represented African Americans and their struggle to end slavery.
B. It represented African Americans and their struggle for equality.Answer:
Explanation:
