The center of mass of the Earth-Moon system lies approximately 1,710 km from the center of the Earth.
The center of mass of the Earth-Moon system is a point in space that is located within the Earth-Moon system, around which the system rotates. The position of this point is dependent on the distance between the Earth and the Moon, as well as their respective masses.
To determine the location of the center of mass, we use the following formula: Center of mass = [(Mass of Earth x Distance to Earth) + (Mass of Moon x Distance to Moon)] / (Mass of Earth + Mass of Moon); Given that the distance between the Earth and the Moon is 3.85 x 10^8 m, the mass of the Earth is 5.98 x 10^24 kg, and the mass of the Moon is 7.35 x 10^22 kg, we can solve for the center of mass of the Earth-Moon system.
Plugging in the values into the formula, we get Center of mass = [(5.98 x 10^24 kg x 0 m) + (7.35 x 10^22 kg x 3.85 x 10^8 m)] / (5.98 x 10^24 kg + 7.35 x 10^22 kg); Center of mass = 1,710,000 m. Therefore, the center of mass of the Earth-Moon system lies approximately 1,710 km from the center of the Earth.
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In projecting statments, the analyst makes judgments about the firm's? Select one: a. working capital policies b. cash reserves c. capital expenditures d. all of the above
Option d is correct. all of the above. In projecting statements, the analyst makes judgments about various aspects of the firm's financial decisions and strategies, including working capital policies, cash reserves, and capital expenditures.
These projections involve making estimations and assumptions based on historical data, industry trends, and the company's future plans.
a. Working capital policies: Working capital refers to the funds a company uses for day-to-day operations and managing its short-term obligations. The analyst assesses the firm's working capital policies, such as how it manages its current assets and liabilities, to project future cash flows and liquidity.
b. Cash reserves: Cash reserves refer to the amount of cash and cash equivalents a company holds to meet its immediate financial obligations or take advantage of investment opportunities. The analyst considers the firm's cash position, cash flow projections, and cash management strategies to project future cash reserves.
c. Capital expenditures: Capital expenditures (CapEx) represent the funds invested by a company in long-term assets, such as property, plant, and equipment. The analyst evaluates the firm's CapEx plans, growth strategies, and investment decisions to project future capital expenditures.
When projecting statements, the analyst considers multiple factors, including working capital policies, cash reserves, and capital expenditures. These judgments are essential for estimating future financial performance and evaluating the firm's financial health and investment potential. By analyzing these aspects, the analyst provides insights into the firm's financial outlook and helps stakeholders make informed decisions.
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If the net force on an object stays the same but the mass of the object is doubled, what will happen to the
acceleration of the object?
Answer:
The acceleration of the object decreases I think
Explanation:
5. There is a bell at the top of a tower that is 45 m high. The bell's mass is 200 kg. The bell has energy. Calculate it.
45000
900000 J
9000 J
88200 J
Answer:
Explanation:
Since the bell is at rest in an elevated position, we can assume that it only has potential energy.
U=mgh is the formula for potential energy where U=potential energy, m= mass, g=acceleration due to gravity, and h=height.
Plug in known variables....
U=200kg*9.8m/s^2*45m
U=88200 joules of potential energy or letter D.
our sun is a star that is fueled by a specific type of nuclear reaction. which type of nuclear reaction is this?
Answer:
the fusion of hydrogen nuclei or in other words "nuclear fusion"
Explanation:
A friend stands in a treehouse 4.95 m off the ground. She drops a bowling ball
of mass 4.98 kg onto a highly elastic trampoline 1.02 m above the ground. The
bowling ball lands on the trampoline, which stretches downward until the ball
stops, just barely before touching the ground. Sketch an energy bar chart of the
situation. What is the elastic spring constant of the trampoline fabric?
Answer:
880 N/m
Explanation:
The elastic spring constant of the trampoline fabric is 184 N/m..
What is Hooke’s Law ?Hooke’s law states that “ within elastic limit, Stress is directly proportional to the strain”.
I.e. Stress ∝ Strain
Stress = Y Strain
Where proportionality constant Y is called as modulus of elasticity.
And it is given by Y = Stress÷Strain Where stress is “applied force(F) per unit cross sectional area(A) on which force is applied”.
I.e Stress = F/A
strain is “ ratio of change in length to original length”
I.e Strain = Δl÷L
Since the strain is a ratio of two similar quantities therefore it is dimensionless.
Units of modulus of elasticity is N/m².
According to hook's law,
F =kx where k is called as spring constant and x is elongation.
In this problem,
Given,
height of the ball from ground = 4.95m
mass of the ball m = 4.98kg
height of the ball from surface of the trampoline = 4.95-1.02 = 3.93m
according to law of kinematics,
v² = u² + 2as
v² = 0 + 2*9.8*3.93
v = 8.77 m/s this is final velocity of ball at the surface of the trampoline.
when ball falls on the trampoline with this velocity, trampoline stretches and at distance 1.02m from surface of the trampoline, it come to rest(actually it bounce back from that point).
The acceleration produced in the ball due to trampoline is,
a = u²/2s = 8.77²/(2*1.02) = 37.7 m/s²
Hence force applied on the trampoline is,
F = ma = 4.98kg * 37.7 m/s² = 187.7 N
The spring constant k is
k =F/x = 187.7/1.02 = 184 N/m.
Hence Spring constant is 184 N/m.
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In a particular type of cat, coat color follows the dominant/recessive pattern of inheritance. The allele for a brown coat (B) is dominant to the allele for a white coat (b)
answers: They have different genotypes but the same phenotype.
They have the same genotype and the same phenotype.
They have the same genotype but different phenotypes.
They have different genotypes and different phenotypes.
A. They have different genotypes but the same phenotype.
What are the alleles when two distinct ones for the same trait have an equal impact on the phenotype?When both alleles for a characteristic are equally expressed in an organism's phenotype, codominance is seen. In other words, both the dominant and recessive alleles will manifest themselves separately in the phenotypic for heterozygous creatures.
By mating an unknown dominant genotype to a recognized recessive genotype, what procedure is the phenotype of the unknown dominant genotype determined?Test crossing is a type of cross-breeding that is done to try and identify the dominant character's genotype. Here, an unidentified dominant trait is crossed with a recognized recessive trait. For instance, a tall plant (whose genotype is unknown) is crossed with a dwarf (its genotype is known).
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First, let us consider a sled of mass m being pulled by a constant, horizontal force of magnitude f along a rough, horizontal surface. the sled is speeding up. how many forces are acting on the sled
The work performed by the frictional force is equal to the amount of energy that is dissipated. And this effort is simply the difference between the child's and sled's initial mechanical energy and their final mechanical energy.
Therefore, 3,500 joules less than 3,125 joules equals the work generated by friction. m is the mass of the moving object, g is the acceleration brought on by gravity, and is the angle of inclination. The normal force (FN) acting on an object resting on an inclined plane is equal to the product of the body's weight in kilograms and the sine of the inclination angle. The Law of Inertia, sometimes known as Newton's First Law, holds that an item at rest will remain at rest until acted upon by an external force.
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help please:))))))))))))))))))))
Answer:
a and c
Explanation:
12. A measuring cylinder has 150ml. of water in it. When a stone is immersed into the measuring cylinder, the water level raised to 210cm. What is the volume of the stone?
Answer:
60ml
Explanation:
I'm going to assume you mean 210ml not centimeters. To find the volume all we do is subtract both values or with the formula [ f - i = v ] where f = final amount and i = initial amount.
210 - 150 = 60ml
Best of Luck!
The final level of water should be = 210
\( {cm}^{3} \)
or 210 ml
━━━━━━━━━━━━━
Given:.Initial level of water = 150mlFinal level of water = 210 ml━━━━━━━━━━━━━
Need to find:Volume of stone =?━━━━━━━━━━━━━
Solution:The volume of stone will be equal to the change in level of water.
that's,
210 - 150 \( {cm}^{3} \)
= 60\( {cm}^{3} \)
Hence the volume of the stone is 60 \( {cm}^{3} \)
How was the was wave of the 1800s different from the
The wave of the 1800s, also known as the Second Great Awakening, was different from the First Great Awakening in several ways. Firstly, the Second Great Awakening was more widespread and lasted longer than the First Great Awakening, which occurred mainly in the mid-1700s and was centered in the New England colonies.
Secondly, the Second Great Awakening was characterized by a greater emphasis on individualism and personal religious experience, with preachers encouraging individuals to seek salvation through personal conversion and the establishment of a personal relationship with God. Thirdly, the Second Great Awakening was marked by a significant increase in the number of new religious denominations, including the Mormons, Seventh-Day Adventists, and the Disciples of Christ. Fourthly, the Second Great Awakening had a greater impact on American society as a whole, contributing to the rise of the abolitionist and women's suffrage movements. In summary, the Second Great Awakening was more widespread, emphasized individualism and personal religious experience, saw the emergence of new religious denominations, and had a greater impact on American society than the First Great Awakening.
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A 2.0 kg sphere with a velocity of 6.0 m/s collides head-on and elastically with a stationary 10 kg sphere
Question: A 2.0 kg sphere with a velocity of 6.0 m/s collides head-on and elastically with a stationary 10 kg sphere, What is thier velocities after collision.
Answer:
v = 6 m/s, v' = 0 m/s
Explanation:
From the question,
For Elastic collision,
mu+m'u' = mv+m'v'......................... Equation 1
Where m = mass of the first sphere, m' = mass of the second sphere, u = initial velocity of the first sphere, u' = initial velocity of the second sphere, v = final veolocity of the first sphere, v' = final velocity of the second sphere.
Also,
The relative velocity before collision = relative velocity after collision
u-u' = v-v'............................ Equation 2
Given: m = 2 kg, m' = 10 kg, u = 6 m/s, u' = 0 m/s
Substitute into equation 1 and 2
2(6)+10(0) = 2v+10v'
2v+10v' = 12.............. Equation 3
6-0 = v-v'
v-v' = 6 ................... Equation 4
Solve equation 3 and 4 simultaneously.
v = 6+v'............. Equation 5
Substitute equation 5 into equation 3
2(6+v')+10v' = 12
12+2v'+10v' = 12
12v' = 12-12
v' = 0/12
v' = 0 m/s.
Also substitute the value of v' into equation 5
v = 6+0
v = 6 m/s
in order for LeBron James to score a slam-dunk what must he exert?
Please Help Thank you!
Study the scenario. A book falls off a table and lands on the floor. The isolated system consists of the book and the floor, and ignores air resistance. The amount of energy in the system is 5 J when the book is sitting on the table. At some point during its fall, there is 4 J of gravitational potential energy in the system. Which choice best describes the amount and form of energy in this system when the book is at this point?
When the book is at the point where there is 4 J of gravitational potential energy in the system, the total amount of energy in the system will still be 5 J, since energy cannot be created or destroyed, only transformed from one form to another.
At this point, the energy in the system will consist of two forms: gravitational potential energy and kinetic energy. The 4 J of gravitational potential energy is due to the book's position relative to the floor, and is equal to the work done by gravity in lifting the book from the floor to its initial position on the table. As the book falls, this potential energy is converted into kinetic energy, which is the energy of motion. The kinetic energy of the book increases as it falls, until it reaches the floor, at which point all of the potential energy has been converted into kinetic energy.
Therefore, at the point where there is 4 J of gravitational potential energy in the system, the remaining 1 J of energy in the system will be in the form of kinetic energy.
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The complete question is:
Study the scenario. A book falls off a table and lands on the floor. The isolated system consists of the book and the floor, and ignores air resistance. The amount of energy in the system is 5 J when the book is sitting on the table. At some point during its fall, there is 4 J of gravitational potential energy in the system. Which choice best describes the amount and form of energy in this system when the book is at this point?
a) 5J
b) 4J
c) 9J
d) cant say
it takes less and less time to fuse heavier and heavier elements inside a high-mass star.
This statement is partially correct. It takes less and less time to fuse heavier elements up to iron inside a high-mass star, but beyond iron, fusion requires energy instead of releasing energy and is not sustainable.
It takes less and less time to fuse heavier and heavier elements inside a high mass star. Iron is the most stably bonded atomic nucleus. When a stellar iron core collapses, large numbers of neutrinos are formed, and then: they immediately pass through the core and escape to space.
Higher mass stars will switch from helium to carbon burning and extend their lifetimes. Even higher mass stars will burn neon after carbon is used up. However, once iron is reached, fusion is halted since iron is so tightly bound that no energy can be extracted by fusion
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What came first, a chicken or an egg
Answer:
a chicken
a chicken came first
Answer:
A Chicken
A chicken came first
A balloon is partially inflated and sealed. A number of weights are attached to the balloon such that it is neutrally buoyant when submerged at a certain depth in a beaker of water. Describe the motion of the balloon, if you push the balloon down to a greater depth and release it. Explain.
This motion of the balloon is an example of buoyancy, which is the upward force exerted by a fluid on an object immersed in it.
Example of buoyancy motionWhen the balloon is neutrally buoyant, it means that the weight of the balloon and the weights attached to it is equal to the weight of the water displaced by the balloon.
If you push the balloon down to a greater depth and then release it, the balloon will rise back up to its original position.
This is because the balloon is still partially inflated and contains air, which is less dense than water. When you push the balloon down, the water pressure compresses the air in the balloon, causing it to become smaller in size.
When you release the balloon, the compressed air expands and pushes the balloon upwards towards the surface of the water.
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If a load of a lever is 100 newtons and the force you apply is 20 newtons, what is your mechanical advantage?
Answer: 5 n
Explanation:
What is the Reynolds number for water?
The velocity of tap water is about u = 1.7 m / s u = 1.7\ \rm m/s u=1.7 m/s. In our Reynolds number calculator, you can choose (as a substance) water at 10 ° C , \rm 10\ °C, 10 °C,, and you obtain the Reynolds number R e = 32483 \rm Re = 32 483 Re=32483. Hence, the water flow is turbulent
The Reynolds number for water is a dimensionless value that is used to characterize the flow of water in a given system.
It is defined as the ratio of the inertial forces to the viscous forces in the system, and is given by the equation:
Reynolds number = (ρVD)/μ
Where ρ is the density of the water, V is the velocity of the water, D is the characteristic length of the system, and μ is the dynamic viscosity of the water.
The Reynolds number is an important parameter in fluid dynamics, as it helps to determine the type of flow that is present in the system. For example, a low Reynolds number indicates that the flow is laminar, while a high Reynolds number indicates that the flow is turbulent.
Overall, the Reynolds number is a useful tool for understanding and predicting the behavior of water in a given system.
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PLS HELP ILL GIVE U BRAINLIST!!
Negatively charged free electrons move in one direction , and positively charged holes move ir the opposite direction.
true or false
Answer: The correct statement is True.
Explanation:
There are two types of charges in the electric field:
Negative charge known as electronsPositive charge known as holesThe above two are oppositely charged species and we also know that electric current is the flow of free electrons in a current.
Negative charges (Electrons) flow from the negative terminal to the positive terminal while positive charges (holes) flow from the positive terminal to the negative terminal. Thus, they move in the opposite direction.
Hence, the correct statement is True.
In the experiment you used objects with masses that were not necessarily known. Assume that it is determined that the mass of an object that produces a deformation of size 3, is 120 grams. What is the mass of an object that would produce 1 unit of deformation
Answer:
40 gm
Explanation:
size one is 1/3 of size 3
so the mass is also 1/3
1/3 * 120 gm = 40 gm
how much moisture is removed from a mobile a/c system during a typical evacuation?
An evacuation is a process that removes air and moisture from the A/C system. The level of moisture in the system can affect its performance and cause damage to its components. Therefore, evacuating the system is a crucial step in ensuring optimal A/C performance.
During the evacuation process, a vacuum pump is used to remove the air and moisture from the system. The length of time for the evacuation process and the level of vacuum pressure used can impact the amount of moisture removed. However, on average, it is estimated that about three percent of moisture is removed during the evacuation process.
In summary, during a typical evacuation of a mobile A/C system, about three percent of moisture is removed. This process is crucial in ensuring optimal A/C performance and protecting the system from potential damage.
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Which of the following describes a change in energy that occurs as an acorn falls from a tree toward the ground
As an acorn falls from a tree toward the ground, gravitational potential energy is converted into kinetic energy.
To find the correct option among all the options, we need to know about the conversation of energy.
How are the gravitational potential energy and kinetic energy defined near the earth surface?Near the earth surface, the gravitational potential energy is given as mass×g×height from the earth surface.Kinetic energy is given as 1/2×mass×velocity².How are the gravitational potential energy and kinetic energy converted when acorn falls from a tree?When an acorn is going to fall, it is at maximum height of its journey, so it has maximum gravitational potential energy.Also, at that time, its kinetic energy is zero as it's at rest.But when it moves down, its potential energy decreases as the height decreases and kinetic energy increases due to increasing velocity. So that its total mechanical energy is conserved.Thus, we can conclude that option (d) is correct.
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two step dimensional analysis
(step by step)
convert :
4900mm to cm
5.59kL to quarts
When we convert 4900mm from two-step dimensional analysis it would be 490 cm and 5.59kL to 5923.667 quarts.
What is dimensional Analysis?Dimensional Analysis is a technique for analysis where physical quantities are expressed in terms of their basic dimensions and is frequently applied when there is insufficient data to create accurate equations.
As given in the problem we have to convert
4900mm to cm
As we know that there are 1000 mm in 1 m
1000 mm = 1 m
4900 mm = 4.9 m
1 m = 100 cm
4.9 m = 4.9×100
=490 cm
As we have to convert 5.59kL to quarts
1 Kiloliter = 1056.69 US liquid quart
5.59kL = 5.59 ×1056.69 quarts
=5923.667 quarts
Thus, we converted 4900mm to 490 cm and 5.59kL to 5923.667 quarts.
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Help!! I will mark brainliest!! Worth 50 pts!
If 50.0 calories of heat energy are added to 120 grams of copper currently at room temperature (20°C), what will the change in temperature be?
24.6°C
30 °C
4.6°C
20°C
The change in temperature of the copper is 4.6 ⁰C.
What is heat capacity?
The heat capacity of an object is the total quantity of heat needed to raise the entire mass of a substance by 1 kelvin.
Mathematically, heat capacity is given as;
Q = mcΔθ
where;
Q is the quantity of heat in the material = 50 calories c is the specific heat capacity of copper = 0.09 cal/gcΔθis change in temperatureΔθ = Q/mc
Δθ = (50) / (120 x 0.09)
Δθ = 4.6 ⁰C
Thus, the change in temperature of the copper at the room temperature is determined from the heat capacity of copper.
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define principle of lever
Answer:
pull to activate something
Explanation:
from greatest to least, rank the frequency of radiation of these emitters of radiant energy: (a) red-hot star, (b) bluehot star, and (c) the sun.
The ranking of the frequency of radiation from greatest to least would be: (b) blue-hot star, (a) red-hot star, and (c) the Sun.
The frequency of radiation emitted by different celestial bodies depends on their temperature. According to Wien's displacement law, the hotter an object is, the higher the frequency of radiation it emits. Therefore, the ranking of the frequency of radiation from greatest to least would be as follows:
1. Blue-hot star: Blue-hot stars have extremely high temperatures compared to other celestial bodies. Their surface temperatures can reach tens of thousands of Kelvin. As per Wien's law, this high temperature corresponds to a high frequency of radiation, predominantly in the blue and ultraviolet regions of the electromagnetic spectrum.
2. Red-hot star: Red-hot stars have lower temperatures than blue-hot stars but are still hotter than the Sun. Their surface temperatures typically range from a few thousand to several tens of thousands of Kelvin. Consequently, their frequency of radiation falls in the red and orange regions of the spectrum, but it extends into the blue and infrared regions as well.
3. The Sun: The Sun is a yellow dwarf star with a surface temperature of around 5,500 Kelvin. Its frequency of radiation peaks in the yellow-green region of the spectrum, which is why we perceive the Sun as predominantly yellow. However, it emits radiation across a broad range of frequencies, from ultraviolet to infrared.
In summary, the ranking of the frequency of radiation from greatest to least would be: (b) blue-hot star, (a) red-hot star, and (c) the Sun.
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How is MBC better than fuse wire
MCB is more sensitive to current than the fuse. It detects any abnormality in the current flow and automatically switches off the electrical circuit. In the case of MCB, the fault zone of the electrical circuit can be easily identified. ... But in case of the fuse, the entire fuse wire needs to be replaced.
3d2
You have been asked to find out the best material for insulating a hot water tank.
You have three materials: aluminium foil, cotton wool and expanded polystyrene.
Describe an experiment to compare the effectiveness of these materials.
Include in your description the way you would use your results to decide the most
effective material.
The most effective insulating material is polystyrene.
What is insulating material?The material which isolates the body and doesn't allow heat and mass to flow out of the control system.
The insulating material should have the lowest thermal conductivity.
Polystyrene foam has low thermal conductivity which makes it a great insulator to heat.
Aluminum foil can be an effective insulating material because it doesn't flow heat out into the environment.
Cotton wool is effective, but not it is not fire resistant.
Thus, the best effective insulating material is polystyrene.
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4) A force of 500 N acts on an area of 0.05m2. Find the pressure in Pascal.
Answer:
pressure = force ie 500 N divided by area ie 0.05m².
p=f by a
p= 500n divided by 0.05 m²
p= 10,000 pascal
1. In what condition a JFET can be used as a voltage-controlled resistor? Why is the V-I characteristics linear in that region? [10] 2. Determine \( I_{\mathrm{D}} \) and \( V_{\mathrm{GS}} \) for the
1. A JFET can be used as a voltage-controlled resistor in the saturation region of its V-I characteristics where the JFET acts as a variable resistor for the applied voltage at the gate. The reason why the V-I characteristics are linear in that region is that the JFET channel is wide open to the current and the voltage applied across it,
thereby making the drain-source voltage proportional to the gate-source voltage. This effect causes the JFET channel to act as a voltage-controlled resistor. When the gate-source voltage is zero, the channel is open, and the JFET acts as a resistance, making it very low resistance for conduction. When a voltage is applied to the gate, it reduces the width of the channel and hence reduces the current flow through it, thereby increasing its resistance.
2. We have been given the following circuit diagram:The drain current, Id = 4mA and the gate voltage, \(Vg = -2V.Id = (Vp - Vgs)^2/2RdGiven, Vp = -10V; Rd = 1kΩSo,\) we can calculate the value of Vgs using the above formula as follows:4mA = (-10V - Vgs)^2/2(1kΩ)8mA x 1kΩ = (-10V - Vgs)^2-8V = -10V - VgsVgs = -10V + 8VVgs = -2VTherefore, the drain current, Id = 4mA and the gate voltage, Vg = -2V.
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