Answer:
Recycling of paper cannot be reversed thus making it an irreversible change
Explanation:
When we recycle paper an entirely new product can be made which cannot be changed back to paper
What is the velocity of an object that has been in free fall for 2.5 s?
A. -3.9 m/s downward
B. 3.9 m/s downward
C. 250 m/s downward
O
D. 25 m/s downward
After 2.5 seconds of free fall, an item will be moving downhill at a speed of 25 m/s.Option D is correct.
What is velocity?The change of displacement with respect to time is defined as speed. Speed is a scalar quantity. It is a time-based component. Its unit is m/sec.
The given data in the problem is;
t(time)= 2.5 s
u(falling velocity)=0 m/sec
v(striking velocity)=? (m/sec)
Newton's first equation of motion:
v=u+at
v=u+gt
v=10 × 2.5
v= 25 m/s downward(+ ve taken as downward)
The velocity of an object that has been in free fall for 2.5 s will be 25 m/s downward.
Hence, option D is correct.
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How much weight can be placed on the spring so that the end of the spring is 2m above the ground?
The weight must be 288N placed on the end of the spring when it is 2m from the ground.
What is gravitational potential energy?If an object is lifted, work is done against gravitational force. The object gains energy.
Given is a spring has a spring constant of 48 N/m. The end of the spring hangs 8 m above the ground. The final height of weight above the ground, h =2m
Using Hooke's law, expressed as
Force, F = k (x₂-x₁).
Put the values, we get
F = 48 (8-2)
F = 288 N
This force applied on the spring is equal to the weight placed on the spring.
Weight W= 288N.
Thus, the weight must be 288N.
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Question: What are phases of the moon. What evidence can you provide to explain how the moon revolution determines its shape?
Think!!!! Write Claim, Reasoning and add evidence
Answer:
Claim: The phases of the Moon progress from new moon to crescent moon, first-quarter moon, gibbous moon, and full moon as the Moon waxes (the amount of illumination is increasing from Earth). As the moon revolves around Earth, its sunlit surface is visible in different portions as it reveals its phases.
Evidence: As the moon revolves around Earth, different parts of the sunlit surface of the moon can be seen. As a result, the moon's appearance changes from night to night from Earth's perspective. The moon's apparent shape changes, as well as its position in the sky.
Reasoning: Over the course of two weeks, the moon's entire appearance changes, from a bright circle to a circle sliced in half and finally to nothing.
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Answer:
Claim: The phases of the Moon progress from new moon to crescent moon, first-quarter moon, gibbous moon, and full moon as the Moon waxes (the amount of illumination is increasing from Earth). As the moon revolves around Earth, its sunlit surface is visible in different portions as it reveals its phases.
Evidence: As the moon revolves around Earth, different parts of the sunlit surface of the moon can be seen. As a result, the moon's appearance changes from night to night from Earth's perspective. The moon's apparent shape changes, as well as its position in the sky.
Reasoning: Over the course of two weeks, the moon's entire appearance changes, from a bright circle to a circle sliced in half and finally to nothing.
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What is the typical magnification of an ocular lens? what other magnifications are possible?.
Your scope's ocular lenses have a magnification of 10X. Magnification typically falls between 10x and 1,000x, with some versions even going up to 2000x.
What is magnification?
Magnification refers to the image's size in relation to the item that produced it.
The ratio of image length to object length, measured in planes perpendicular to the optical axis, is referred to as linear magnification.
For imaging, optical microscopes combine ocular and objective lenses. The sum of the magnifying powers of the individual lenses produces the observation magnifying power.
This typically falls between 10x and 1,000x, with some versions even going up to 2000x.
Hence, the ocular lenses of your scope are 10X magnified and magnification usually ranges from 10x to 1,000x, while some versions can reach 2000x.
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For thousands of years people thought that heavier objects fell faster than lighter objects. In fact, this is something that we can sometimes observe in our everyday lives. But according to Galileo this is wrong! His Law of Falling Bodies says that all objects fall at the same rate. After watching the assigned video please comment on how it is possible that Galileo's theory says one thing but our everyday experience says something else.
Answer:
See below
Explanation:
Gallileo is CORRECT in a vacuum where there is no air friction
air friction affects same or different weight objects differently and will cause same-weight or different weight objects to fall at different speeds
A wall clock has a second hand 25.0 cm long.
For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of Fast car, flat curve.
Part A
What is the radial acceleration of the tip of this hand?
Express your answer in centimeters per second squared.
The radial acceleration of the tip of this hand is 0.274 cm/s². The answer is expressed in centimeters per second squared.
What is acceleration?The rate of change of velocity with respect to time is known as acceleration. According to Newton's second law, the eventual effect of all forces applied to a body is its acceleration.
The radial acceleration of the tip of this hand is found as;
[tex]\rm \omega = \frac{2 \pi}{60} \\\\ a_r= \omega^2r\\\\ a= (\frac{2\pi}{60} )^2\times 25\\\\a=0.274 \ cm/s^2[/tex]
Hence,the radial acceleration of the tip of this hand is 0.274 cm/s²
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please help me fast
_________ are the smallest plant, visible to our eyes .
The nuclear reaction that powers the sun involves the fusion of four protons (mp = 1.673x10-27 kg) into a helium nucleus (mHe = 6.645x10-27 kg). The process involves several steps, but the net reaction is simply: 4p He + energy. How much energy is released overall in each fusion process? Give your answer in J and MeV
Explanation:
it's 5 + 5 + 5 + 12 + 5 x 7 x 7 7+ 8 5+6+ +8 +9 + 9 5
Two friends decide to start selling their drone camera aerial footage. Which economic question have they answered?
For whom to produce?
How much to produce?
How to produce?
What to produce?
The brothers that want to start selling their drone camera aerial footage have answered the question, what to produce.
What is an economic question?The term economic question is a question that evaluates the processes involved in production. These questions are;
For whom to produce?How much to produce?How to produce?What to produce?In this case, the brothers that want to start selling their drone camera aerial footage have answered the question, what to produce.
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Answer:What to produce
Explanation:
A ball of mass 50 g is suspended at a height of 2.5 m from the ground. In terms of the gravitational
potential energy (GPE) and kinetic energy (KE) of the ball, which of the following statements is
correct?
A GPE is maximum, KE is 0
B. KE is maximum, GPE is 0
C. GPE = KE at this point
D. the ball has no GPE
Answer:
A
Explanation:
Finding Gravitational Potential Energy :
GPE = mass x gravitational acceleration x height
GPE = 50 x 10⁻² x 10 x 2.5GPE = 5 x 2.5GPE = 12.5 JFinding Kinetic Energy :
KE = 1/2 x mass x (velocity)²
KE = 1/2 x 5 x 10⁻² x (0)²KE = 0Hence, option A is correct.
A student places two magnets as shown; with their south poles equal distances from a compass. The student observes that the compass needle points in the indicated direction. From this observation alone can you determine which magnet is stronger. Justify your reasoning?
Since the direction of the needle depends on the proximity of the magnet thus this test alone is insufficient to determine the stronger magnet.
What is a magnetic field?A magnetic field refers to the region where the effect of a magnet is felt. The magnetic field can be observed by the use of a compass.
Now, we know that the closer the magnet is to the compass, the greater the deflection hence this test alone is insufficient to determine the stronger magnet.
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answer with detail explanation if possible
The work done on a body when it is moved is 125J
What is Work energy theorem?It states that the Work done in moving a body is equal to the change in kinetic energy of the body
Kinetic energy = 1/2 mv²
Given is a body of mass m = 6kg, moving distance d =25 m in time t=5s.
Final Velocity v = 25/5 = 5 m/s
The body is initially at rest, so, final velocity is zero. Then, change in kinetic energy will be
ΔK.E = K.Ef - K.Ei
ΔK.E = 1/2 x 6 x (5)² -0
ΔK.E =125J
According to work energy theorem, work done is
W = 125J
Thus, the work done on a body when it is moved is 125J.
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1. Name three products excreted by plants but commercially used by man. Also state the purpose for which they are used
Answer:
1) Oxygen, It is made as a by-product of photosynthesis. it is used for breathing.
2) Gums, It is a degradation product of cells. It is used in cosmetics, pharmaceuticals, etc.
3) Latex, It is made from the sap of rubber trees. It is used in the manufacture of rubber products.
Explanation: Hope it helps you:))))
Have a good day
what are transistors and its types
Answer:
A transistor is a semiconductor device used to amplify or switch electronic signals. Transistors are broadly divided into three types: bipolar transistors (bipolar junction transistors: BJTs), field-effect transistors (FETs), and insulated-gate bipolar transistors (IGBTs).
Explanation:
HOPE THIS HELPS AND HAVE A NICE DAY <3
Make a 1000-cm³ container. What
will be the dimensions of the
length, width, and height? How
much water will this container
hold? What is the mass of this
amount of water?
Answer:
see below
Explanation:
OK....here is one :
L W H
10 x 10 x 10 cm = 1000 cm^2 this is a cube
the container will hold the volume of 1000 cm^3 of water
which will have a mass 1 kg ( this is a liter)
1. What kind of light phenomena happen due to the refraction of light upon hitting the small crystals that make up cirrus or cirrostratus clouds?
2. A light phenomena which are formed when light passes through clouds and strikes
18
the ice crystals in them?
3. A light phenomenon formed from the combination of several light properties like refraction, reflection, and dispersion?
4. Rainbow are created after a rain shower and . 5. What do you call a visible accumulations of tiny water droplets or ice crystals
in the Earth’s atmosphere?
6. Howmanycolorsinrainbow?
7. What kind of rainbows are formed when light strikes small raindrops with almost the same size?
8. What kind of rainbows are formed when two inner reflections are done instead of one; this causes the reversal of colors in a secondary rainbow in comparison to a primary rainbow?
9. What do you call as a reflective surface that is curved inward and away from the light source?
10. What kind of mirror are curved outward like the bottom
of a spoon?
1. The light phenomena happen due to the refraction of light upon hitting the small crystals that make up cirrus or cirrostratus clouds is called Sundogs.
2.A light phenomena which are formed when light passes through clouds and strikes the ice crystals in them is called Halos.
3.A light phenomenon formed from the combination of several light properties like refraction, reflection, and dispersion is Rainbow.
4. Rainbow are created after a rain shower and Sun light.
5. A visible accumulations of tiny water droplets or ice crystals.
in the Earth’s atmosphere are called Clouds.
6. There are seven colors in a rainbow.
7. The kind of rainbows are formed when light strikes small raindrops with almost the same size are Supernumerary rainbows.
8.The kind of rainbows are formed when two inner reflections are done instead of one; this causes the reversal of colors in a secondary rainbow in comparison to a primary rainbow are Secondary rainbows.
9. A reflective surface that is curved inward and away from the light source is concave mirror.
10. The kind of mirror are curved outward like the bottom
of a spoon is convex mirror.
What is reflection?When a light strikes on a shiny surface, it reflects back the light ray in the same medium. The phenomenon is called reflection and the ray is called the reflected ray.
Thus, all the questions are answered.
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Mr. Mock sets up a demonstration on a moving bus. The device consists of a ball attached with a string to a magnet. He uses the magnet to hang the ball from the top of the school bus as the bus turns the corner at a constant speed. What will the ball do?
A) Nothing changes.
B) The ball rolls forward slowly.
C) The ball rolls forward rapidly.
D) The ball rolls backward.
When the bus turns the corner at a constant speed, the velocity of the ball will change and the ball will rolls forward slowly.
Motion of an object at constant speed
The speed of an object is defined by magnitude only while the velocity of an object is defined by both magnitude and direction.
Suffice it to say that when an object is moving at a constant speed changes direction, its velocity will change.
Velocity of ballThe velocity of the ball can be determined by modelling the speed of the car in the bend or corner.
v = √μrg
where;
μ is coefficient of frictionr is radius of the cornerg is gravitySince the velocity of the bus changes, the velocity of the ball will change.
Thus, when the bus turns the corner at a constant speed, the velocity of the ball will change and the ball will rolls forward slowly due to magnetic force acting as resistive force.
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with detailed explaniation
Answer:
Hi,
I can't tell what it says where you have written 'with the horizontal giving ____'.
I am unable to tell what the word after 'giving' is. Please ix it ASAP.
Thank you
Explanation:
Answer:
Hello is it possible if you can explain what we are supposed to detail and I can't read what the photo says it is a jumble of words?
Explanation:
Erwin Schrödinger developed the quantum model of the atom. What scientific knowledge was necessary for Schrödinger’s work?
Answer:
Erwin Schrödinger developed the quantum model of the atom. What scientific knowledge was necessary for Schrödinger's work? The discovery of the electron.
Explanation:
A car travels 310 miles in 6. hours. How far will it go in 8 hours at this average
velocity?
Pls show work
Answer:
413
Explanation:
first i divided 310 by 6 which equals 51.66 and then i times it by 8 which equals 413.33 and you perbulby are going to round ot so it would by just 413
Hope This Helped
a steam engine work on its vicinity 285 k heat is released with the help of 225 c energy absorbed to the system what is the efficiency of steam engine explain the use of the rest of the energy physic problem
The efficiency of steam engine is 26.66 %.
What is Efficiency?The efficiency is defined as the work done by the engine divided by the heat supplied.
Work done is the difference between the heat supplied and heat rejected.
So, efficiency η = (Qs -Qr) / Qs
Given is the heat supplied Qs = 225 Joules and heat rejected Qr =285 . then the work done is
W = 225 -225 = - 60 Joules
Efficiency η = 60/225 x 100%
η = 26.66 %
Thus, the efficiency of the steam engine is 26.66 %.
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PART A : describe different ways a pendulum system loses energy over time.
PART B: if there were no energy losses what does the law of conservation of energy say the pendulum system would do over time?
The pendulum loses energy through these
Friction along tubesAir resistancedraginternal resistanceWhen you forces it to oscillation then the amplitude increases friction decreases but later on they comes back to their places so energy is lost in terms of heat .
#Part B
There is energy loss so this part is of no use
CFCs were found to destroy what important compound in our atmosphere?
CFCs were found to destroy the important compound in our atmosphere which is called as the Ozone layer.
What are CFCs?The CFCs are called as the Chloro Fluoro carbon are the fuels used in the jet flights long time ago.
The ozone layer protects the harmful UV rays coming from the Sun to reach the Earth's surface. This layer was depleted by the use of CFCs which consist of harmful element Chlorine in large amount.
This has developed a hole in ozone layer over Antarctica. Global warming is the greatest consequence of the depletion of ozone layer.
Thus, CFCs found to destroy ozone layer.
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Predict the gravitational force between two 15-kg balls whose centers are 35 m apart.
[tex]F=G\frac{m_1-m_2}{r^2}[/tex]
[tex]=\frac{(6.67\times10^{-11}N*m/kg^2)(15kg) }{(0.35m)^2}[/tex]
[tex]=1.2\times10^{-7} N[/tex]
Because the weight of one ball is mg = 147 N, the gravitational force between the two balls is [tex]1.2\times10^{-7}N[/tex] or [tex]8.4*10^3[/tex] parts per billion of the weight.
If the period of a wave is 9.2 s, what is its frequency (in Hz)?
The period of the function is the inverse of the frequency:
⇒ (in other words) [tex]period = \frac{1}{frequency}[/tex]
Since the period is 9.2s:
[tex]Frequency = \frac{1}{period}=\frac{1}{9.2} =0.11_.Hz[/tex]
Answer: 0.11 Hz
Hope that helps!
Which statement best defines work? (2 points) Group of answer choices
-Work is the time it takes to move an object once acted upon by a force.
-Work occurs when balanced forces act on an object and cause movement in the direction of these forces.
-Work occurs when a force causes motion of an object, and this motion is in the same direction of the applied force.
-Work is the distance over time that an object moves once acted on by a force.
Answer:last choice is correct. Work is equally to force times distance
Explanation:to generalize, W is equal to to force as a function of distance integrated over distance. Work is equivilent to energy. See work/force equivalency
What kind of weather ,begin emphasis,most,end emphasis, likely happens in the town when the air masses meet?
Storm weather likely happens in the town when the air masses meet because of difference of temperature and humidity of both air masses.
What weather happens when air masses meet?
When air masses move by wind, they carry different weather conditions from the weather conditions of other region. This difference in weather conditions can create a severe storm.
So we can conclude that Storm weather likely happens in the town when the air masses meet because of difference of temperature and humidity of both air masses.
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ten-story building has identical stairs throughout its stairways. A student calculates the amount of work required to climb one set of stairs and the amount of work to climb the entire ten sets.
Which quantity will remain constant in this experiment?
Answer:
c
Explanation:
Identifying Characteristics of Solids
Use the drop-down menus to complete the statements.
The atoms in a solid
The arrangement of atoms in a solid causes it to have a definite
rn are called
solids.??? Please help
Me it’s due RN
The solids whose particles occur in a definite pattern are called crystaline solids.
What is a crystalline solid?The term crystalline solid has to do with the type of solid in which the atoms that components that make up the solid are all in definite positions and occur in a regular repeating pattern.
The particles of a solid are found in fixed positions. The solids whose particles occur in a definite pattern are called crystaline solids.
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a. Remain in a fixed position.
b . Crystalline solids
What are the properties of solid?Some properties of solid are:
solid have a fixed shape and a fixed volumesolid cannot be compressedsolids have high density.force of attraction between the particles in solid is very strong.The space between the particles of solids is negligible.atoms are remain in a fixed positionThe properties of crystalline solid
The atoms that components that make up the solid are all in definite positions Atoms occur in a regular repeating pattern.Hence , The particles of a solid are in fixed positions.
The arrangement of atoms in a solid causes it to have a definite are called crystalline solids.
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The Shanghai World Financial Center is one of the tallest buildings in the world. It features a large trapezoidal opening to allow wind to pass through. The opening is about 35 meters tall. It is about 40 meters along the bottom and 50 meters along the top. What is the approximate area of the opening?
The approximate area of the trapezoidal opening allow wind to pass through is 1575 m².
What is the area of trapezium?The area of the trapezium is the product of height and mean of the top and bottom side of trapezium.
Given is the height h = 35m, the base a =40 m and top b = 50m, then the area of the trapezium is
A = (a +b / 2) x h
Substitute the value into the expression, we get
A = (40 +50/2) x 35
A = 1575 m²
Thus, the approximate area of the trapezium is 1575 m².
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