Answer:
Eliminate D as there is no nonconservative force, then look at each energies before and after. The speed of the book will increase, so kinetic energy is increasing. The height of the book is increasing, so gravitational potential energy is increasing. However, since the spring is becoming decompressed, the elastic potential energy is decreasing.
Explanation:
Answer:
it is A
Explanation:
Patrick passes a soccer ball 6.0m directly across the field to Vanessa who then kicks the ball 14.5m directly down the field to Claudia. What is the balls total displacement as its travels between Vanessa and Claudia
Answer:
8.5m bcs you subtract 6.0m and 14.5m.
12. What is the photoelectric effect, and what experimental evidence led scientists
to discover it? Does this support the wave or particle theory of light? Why?
Answer:
Photoelectric effect, phenomenon in which electrically charged particles are released from or within a material when it absorbs electromagnetic radiation.
Explanation:
The effect is often defined as the ejection of electrons from a metal plate when light falls on it. In a broader definition, the radiant energy may be infrared, visible, or ultraviolet light, X-rays, or gamma rays; the material may be a solid, liquid, or gas; and the released particles may be ions (electrically charged atoms or molecules) as well as electrons. The phenomenon was fundamentally significant in the development of modern physics because of the puzzling questions it raised about the nature of light—particle versus wavelike behaviour—that were finally resolved by Albert Einstein in 1905. The effect remains important for research in areas from materials science to astrophysics, as well as forming the basis for a variety of useful devices.
The emission of electrons from the surface of a metal by the action of light is called photoelectric effect. This phenomenon indicates the behavior of light as particles called photons.
What is photoelectric effect ?The phenomenon of ejection of electrons from the surface of a metal when light of a suitable frequency falls on it is called photoelectric effect. Upon striking the surface of metals , light can set up an electric current which current which corresponds to the flow of electrons. This phenomenon is discovered by Einstein
For instance, visible light can cause ejection of electrons from the surface of metal like cesium which has low ionization enthalpy. This phenomenon is related to the observation that if light is considered as particles.
The particles of light is then called as photoelectrons or photons. Photoelectric effect find application in photoelectric cells used in colorimetry, spectrophotometers etc.
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How much water is displaced by a solid object with a volume of 9 cm3 that is completely submerged in the water?
Given :
An object with a volume of 9 cm³ is completely submerged in the water.
To Find :
How much water is displaced by the object.
Solution :
According to Archimedes' principle, the amount of volume displaced of fluid when an object is fully and partially submerged into that is equal to the volume of the object below the surface of liquid.
Now, it is given that object is fully submerged into water.
Therefore, volume of water displaced by the object is 9 cm³.
Which circuit shows three resistors connected in series?
The circuit shows three resistors connected in series is the letter B because he elements are connected on the same wire and there is only one path for the electric current to flow.
What is the difference between series and parallel circuit?The main difference between series and parallel circuit is the way voltage and current are presented. The voltage will be the same at all points in the parallel circuit and the current will vary. In series circuit, it is the voltage that can be different, while the electric current is the same.
In a series electric circuit, the elements are connected on the same wire and there is only one path for the electric current to flow. For this reason, the electric current is the same in all elements of the circuit.
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Joey wrapped a wire around an iron bolt then connected the ends of the wire to a battery forming a complete circuit. What must have occurred as a result?
(A) The energy in the circuit was lost.
(B) The bolt was magnetized.
(C) The bolt started spinning.
(D) Nothing happened because there was no device.
Answer:
(B) The bolt was magnetized.
Explanation:
(B) The bolt was magnetized.
How are mass and volume alike?
A.) They always stay the same
B.) The cease to exist when placed in a liquid
What are natives from Cambodia called
Answer:
Khmer people make up 90% of the Cambodian population, followed by Vietnamese (5%), with the balance being Chinese, Cham (mostly a muslim people) and indigenous ethnic groups sometimes called Khmer Loeu
Explanation:
Answer:
Khmer
Explanation:
why does the fire snake weight less than it was when it was on fire
Answer:
When Zoe weighs the ingredients (sugar and baking soda), it weighs 25 grams in total. When she weighs the “snake” it weighs 23 grams. This is because some carbon dioxide gas produced during the chemical reaction escapes into the air.
1 What conclusion can you draw about semicircular canals from their name ? A Their shape B Their size Their location in your body D Their function Their function
Answer:
A. Their shape
Explanation:
The name clearly shows that the shape of these canals are semi-circular. The semi-circular canals consist of three tubes filled with fluid and located in the inner ear. They help to maintain balance and transmit impulses through the movement of the fluids. The impulses sent through these fluids are sent to the brain for interpretation.
The function of the canals are not indicated by the name, rather the shape is hinted through the name.
PLEASE ANSWER, I HAVE 5 MINUTES!!!!
Discuss the changes in potential energy, kinetic energy, and total energy for a
skateboarder going up and down on a half-pipe (U-shaped) ramp. Specifically address
the energies when the skater is at the highest point (A), half-way down the ramp (B),
and at the lowest point (C).
Answer:
I HAD THE SAME QUESTION AND SEARCHED IT UP AND GOT THE ANSWERS.
Explanation:
What conclusion can you draw from the information shown in the graph?
O A. Global temperatures are increasing due to human activity.
B. Earth is currently experiencing a period of global warming.
O C. Temperature is the only aspect of climate that is changing.
O D. Global temperatures are increasing due to natural causes.
Answer:
The correct option is;
B. Earth is currently experiencing a period of global warming
Explanation:
From the graph, we have;
1) From 1880 to 1900 the temperature anomaly (°C) averages a few degrees below the average surface temperature
2) The decrease below the average surface temperature is larger from 1900 to 1920
3) The surface temperature rises more steadily from below average to a little above average from 1920 to 1940
4) Between 1940 to 1980, the temperature hovers around the average surface temperature
5) The Earth's surface temperature is more or less steadily increasing from 1960 to present
Therefore, the Earth is experiencing a period of global warming
The moon has a mass of 7.34 . 1022 kg and a radius of 1.74. 10 meters. If you have a mass of 66
kg, how strong is the force between you and the moon?
Answer: F = 106.72 N
Explanation: Newton's Law of Universal Gravitation states that two masses attract each other by a force pointing in a straight line to the center-of-mass of both masses.
It is directly proportional to the masses and inversely proportional to the square of their distance, represented as:
[tex]F=G\frac{m_{1}m_{2}}{r^{2}}[/tex]
where
G is gravitational constant whose value is 6.67x10⁻¹¹ N(m/kg)²
m are masses in kg
r is distance in m
The force between the moon and a person with mass of 66kg is:
[tex]F=6.67.10^{-11}\frac{66(7.34.10^{22})}{(1.74.10^{6})^{2}}[/tex]
[tex]F=\frac{3231.215.10^{11}}{3.0276.10^{12}}[/tex]
F = 106.72 N
The force between a person with mass of 66kg and the moon is 106.72 N.
The strength of the force between person and the moon is equal to 106.6 Newton.
Given the following data:
Mass of moon = [tex]7.34 \times10^{22}\; kg[/tex]Mass of person = 66 kgRadius = [tex]1.74\times 10^6\; meters[/tex]Scientific data:
Gravitational constant = [tex]6.67\times 10^{-11}[/tex]To determine the strength of the force between person and the moon, we would apply Newton's Law of Universal Gravitation:
Newton's Law of Universal Gravitation states that the force of attraction (gravitational force) acting between planet Earth and all physical objects is directly proportional to the mass of planet Earth, directly proportional to the mass of the physical object and inversely proportional to the square of the distance separating the Earth's center and that of the physical object.
Mathematically, Newton's Law of Universal Gravitation is given by the formula:
[tex]F = G\frac{M_1M_2}{r^2}[/tex]
Where:
F is the gravitational force.G is the gravitational constant.M is the mass of objects.r is the distance between centers of the masses.Substituting the given parameters into the formula, we have;
[tex]F = 6.67\times 10^{-11} \frac{(7.34 \times 10^{22} \times 66)}{(1.74 \times 10^{6})^2}\\\\F = 6.67\times 10^{-11} \frac{(4.84 \times 10^{24}) }{3.03 \times 10^{12}}\\\\F = \frac{3.23 \times 10^{14} }{3.03 \times 10^{12}}[/tex]
Force, F = 106.6 Newton.
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50 Points!
1. How does the speaker know that the lump of metal she is holding is an asteroid?
2. How does the speaker “hunt” asteroids? Describe how teams of scientists collect data about asteroids.
3. Both speakers describe the asteroid that hit Earth and caused a massive extinction, including the decimation of the dinosaurs. The speakers describe the size of this asteroid in different terms. Summarize each speaker’s description and explain which one gives you a better picture of the size of this asteroid.
4. Does Carrie Nugent agree with Phil Plait’s assessment that we can defend the Earth from asteroids? Why or why not?
Answer:
How does the speaker know that the lump of metal she is holding is an asteroid?
The patterns formed inside the metal She explains that the rock is older the earth and that it is an asteroid due to the patterns formed inside it that show it contains metallic crystals that cannot be formed on earth but in space where temperatures mean that molten metal takes billions of years to cool.
How does the speaker “hunt” asteroids? Describe how teams of scientists collect data about asteroids.
The speaker works with astroids she attempts to search for them for scientific use. She analyzes how long ago these rocks were coming acrost the earth. How many are in the universe.
Both speakers describe the asteroid that hit Earth and caused a massive extinction, including the decimation of the dinosaurs. The speakers describe the size of this asteroid in different terms. Summarize each speaker’s description and explain which one gives you a better picture of the size of this asteroid.
Debris from the impact orbiting around the Earth shielded sunlight, halting photosynthesis.
The impact was so extreme that life at ground zero was vaporized.
tsunamis, landslides, earthquakes, and heat caused by the impact killed organisms near the site of impact.
Does Carrie Nugent agree with Phil Plait’s assessment that we can defend the Earth from asteroids? Why or why not?
It seems as if she does agree. I believe she has strong intentions to defend the earth and to prevent there to be any more extinction for any more animals I believe she cares to explore and recover so if she could find a way to use the asteroids to her advantage she would.
Explanation:
6. How does the speaker know that the lump of metal she is holding is an asteroid?
- The speaker knows that the lump of metal she is holding is an asteroid because the patterns formed inside the metal. She explains that the rock is older than the earth and that it is an asteroid. This is due to the patterns formed inside it. These patterns show that it contains metallic crystals that cannot be formed on earth, but instead in space where temperatures mean that molten metal takes billions of years to cool. The scientists also use representative sampling. This is done when they deal with such large quantities of objects for estimating.
7. How does the speaker “hunt” asteroids? Describe how teams of scientists collect data about asteroids.
- The speaker “hunts” for asteroids by attempting to search for them for scientific use. She analyzes how long ago these rocks were coming across the earth and how many are in the universe. She also is classifying them by color and shape. Some of the objects can be classified into one or more categories and this could lead to disagreements on where they should or should not be listed. Also, the objects can be difficult to see properly.
8. Both speakers describe the asteroid that hit Earth and caused a massive extinction, including the decimation of the dinosaurs. The speakers describe the size of this asteroid in different terms. Summarize each speaker’s description and explain which one gives you a better picture of the size of this asteroid.
- The asteroid hit at high velocity and effectively vaporized. It made a huge crater, so in the immediate area there was total devastation. A huge blast wave and heatwave went out and it threw vast amounts of material up into the atmosphere. 'It sent soot travelling all around the world.
9. Does Carrie Nugent agree with Phil Plait’s assessment that we can defend the Earth from asteroids? Why or why not?
- I would say that it seems to me as though she does agree. I believe she has strong intentions to defend the earth and to prevent any more extinctions for any more animals. I believe she cares to explore and recover in order to hopefully help find a way to use asteroids to her advantage. On top of that, the object shown is an Irregular galaxy. This can be determined by the fact it has an irregular shape.
9. Does a blackbody radiator emit light waves? Explain.
Answer:
"A blackbody is an object that absorbs all of the radiation that it receives(that is,it does not reflect any light,nor does it allow any light to pass through it and out the other side).The energy that the blackbody absorbs heats it up,and then it will emit its own radiation."
Explanation:
Risk*
A series of questions and choices that help to identify and place organisms by similarity in structures is called
Question 3 options:
a dichotomous key
binomial nomenclature
Linnean system of classification
fossil record
Answer:
dichotomous key
Explanation:
because it is
Which diagram has a greater gravitational force
Answer:
2
Explanation:
Due to the fact that the gravitational force is inversely proportional to the mass of the two interacting objects, heavier objects will be drawn together by a stronger gravitational attraction. As a result, the gravitational pull between two objects grows as their respective masses rise.
What mass has a greater gravitational force?Since the gravitational force is exactly proportional to the mass of both interacting objects, heavier items will be attracted by stronger gravitational forces. Therefore, the gravitational attraction between two objects grows as their respective masses do as well.
The attraction created by gravity is between masses. The gravitational force, commonly known as the gravity force, increases with the size of the masses. With an increase in the distance between masses, the gravitational pull rapidly lessens.
Therefore, second have greater gravitational force.
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starting from rest has and acceleration 0.3 m/s , calculate the velocity and distance travelled by a car after 2 minutes.
Answer:
[tex]v(t=120)=36m/s\\\\d(t=120)=2160 m[/tex]
Explanation:
t=2minutes = 120 seconds:
t=120s
a=0,3m/s²
The cart starting from rest, then: vo=0m/s
We know that:[tex]v(t)=vo+at[/tex]
[tex]v(t)=0,3t[/tex]
After t=120 s the velocity are:
[tex]v(120)=0,3*120\\v(120)=36m/s[/tex]
We know that:[tex]d(t)=do+vo*t+\frac{a}{2}*t^{2}[/tex]
vo=0m/s
do=0m/s
The distance after t=120s are:
[tex]d(120)=0,3*\frac{120*120}{2} \\d(120)=36*60\\d(120)=2160 m[/tex]
please help me!! will mark brainliest
Name any two governmental agencies and any four non-governmental agencies involved in environmental conservation.
Answer:
two governmental: u.s department of agriculture, U.s department of energy
four non-governmental: Greenpeace, Center for environmental research and conversation, earth Island Institute, earth justice
Explanation:
I really hope these help and that I answered correctly
4. What factors contribute to a random distribution pattern? Why do animals
not maintain this distribution pattern year round?
1
Answer:
Random distribution may result when resources are equally distributed and are not scarce. As breeding brings individuals together, random distribution is not maintained year round.
When resources are readily available and evenly distributed, random distribution may occur. The random dispersion of individuals is not maintained year-round, since breeding brings people together.
What contribute random distribution pattern in animals?In environments with stable resources and environmental circumstances, random dispersion typically occurs. This pattern of dispersion is unique in that there are no substantial social contacts between species.
On land and in the water, animals are not equally dispersed. Climate zones or in all the confinements is known as Continuous Distribution, and such species of animals are known as Eurytopic Animals.
They are constrained to certain locations by a number of criteria such as food, shelter, and climate.
Therefore, The absence of any significant social interactions between species is what distinguishes this pattern of dispersion.
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Using the information given, find the number of Electrons of the unknown element: 6 PROTONS, 6 NEUTRONS, 12 ATOMIC MASS
Answer:
the answer is 24 you are correct
Explanation:
how many elements does lythium have
Answer:
three 3
Explanation:
Hiii :( this is the second question and not making sense to me at all please help <3 it’s due soon
Imagine a linear regression line that fits the data below on temperature and it’s correlation to clothes sales. What is the equation for your regression line?
Answer:
Socratic app
Explanation:
it will help you
a plane travels West for a distance of 750 km the trip takes 45 minutes calculate the planes velocity in terms of km/hr
A 54\,\text {kg}54kg54, start text, k, g, end text pig runs at a speed of 1.0\, \dfrac{\text m}{\text s}1.0 s m 1, point, 0, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction.
Answer:
Following are the solution to this question:
Explanation:
In this question, some of the information is missing that's why its solution can be defined as follows:
[tex]v= 0\\\\u= 1.0 \frac{m}{s} \\\\s= 1\\\\m= 54 \ kg\\[/tex]
Using formula:
[tex]\to v^2-u^2=2\cdot a\cdot s \\\\\to 0^2 - 1.0^2= 2 \cdot a \cdot 1\\\\\to - 1=2a\\\\\to a= -\frac{1}{2} \ \frac{m}{s^2}\\\\ \to \bold{F= m\cdot a}\\\\[/tex]
[tex]=54 \times - \frac{1}{2}\\\\= -27\ N[/tex]
A truck is traveling at a speed of 50 km/h. What happens when the truck slows down?
Answer:
it loses its momentum. In simpler ways it is really slow
Explanation:
State the lows of reflection
Answer:
The law of reflection states that when a ray of light reflects off a surface, the angle of incidence is equal to the angle of reflection.
Explanation:
Answer: The law of reflection states that when a ray of light reflects off a surface, the angle of incidence is equal to the angle of reflection.
The north pole of one bar magnet is near the south pole of another bar
magnet. What happens to the magnets?
O A. They repel each other.
B. They attract each other.
C. They twist away from each other.
O D. They neither attract nor repel each other.
Answer: they attract each other .
Explanation: jus took it.
Help plssss ineed answers....
Answer:
Concept: Physics
Convex stands for converging which can form real and virtual Hence C is your answerAnswer:
1: d
2:b
3:b
4:a
5c
second page
1:a
2:c
3:d
4:c
5:d
text me for the rest of the answers or comment on this
All of the following processes are the ones that lead directly to the formation of sedimentary rock EXCEPT-
deposition of rock fragments.
O
freezing of water in cracks in rock.
o
melting of rock deep underground.
movement of wind that carries earth material.
Answer:
melting of rock deep underground.
Explanation:
The melting of rocks deep underground does not produce sedimentary rocks. Most igneous rocks are produced by this process.
When molten rocks underground called magma is solidified in the subsurface, it results into the formation of igneous bodies.
Sedimentary rocks forms by the accumulation of sediments. Inside the basin where the sediments are deposited, they are compacted, cemented and lithified. Chemical and physical weathering of rocks produces sediments.