When the object falls through a viscous fluid with terminal velocity the total downward force becomes equal to total upward force
[tex]\\ \rm\rightarrowtail mg=U+F_v[/tex]
[tex]\\ \rm\rightarrowtail mg=m_1g+6\pi \eta rv_T[/tex]
[tex]\\ \rm\rightarrowtail (m-m_1)g=6\pi \eta rv_T[/tex]
[tex]\\ \rm\rightarrowtail v\rho g=6\pi \eta rv_T[/tex]
[tex]\\ \rm\rightarrowtail \dfrac{4}{3}\pi r^3(\rho-\sigma)g=6\pi\eta rv_T[/tex]
[tex]\\ \rm\rightarrowtail v_T=\dfrac{4gr^2(\rho-\sigma)}{18\eta}[/tex]
[tex]\\ \rm\rightarrowtail v_T=\dfrac{2}{9}\dfrac{gr^2(\rho-\sigma)}{\eta}[/tex]
[tex]\eta[/tex] is viscosityr is radius of tubev_T is terminal velocitym is mass[tex]\rho [/tex]is density of object[tex]\sigma[/tex] is density of fluidg is acceleration due to gravityAccording to the thin-lens equation, when an object is infinitely far away from a lens, where will the image form?.
The image will form at the focal point
1/object + 1/image = 1/focal
If the object distance is infinite then the image distance equals the focal distance
Question 7
1 pts
According to the modern model of an atom,
-the number of protons in the atoms of one type of element will vary.
-moving electrons form an electron cloud in an atom.
-electrons are located in the nucleus of an atom.
-neutrons have a positive charge.
Answer:
I Believe The Answer Is B
Explanation:
How can we measured the volume of spherical object?
What Fitnessgram test is testing your CARDIORESPIRATORY ENDURANCE?
Answer:
pacer test
Explanation:
I will give brainliest
Answer:
75n
Explanation:
i hope this helps
The term for a geographic locations regit above sea level is
Answer:
level HAHAHAHAHAH chariss
A Plane crashes into the side of a mountain. If the crash took place over 9
minutes and the planes velocity before the crash was 2000 yards per
second, what is the acceleration of the plane? *
Given parameters:
Duration of crash = 9min
Velocity before crash = 2000 yards per second
Unknown:
Acceleration of the plane = ?
Solution:
Acceleration is the change of velocity with time.
Acceleration = [tex]\frac{V - U}{t}[/tex]
where v is the final velocity
u is the initial velocity
t is the time taken
We need to convert the time into seconds from min;
60s = 1 min
So, 9min = 60 x 9 = 540s
So input the parameters and solve;
Acceleration = [tex]\frac{2000 - 0 }{540}[/tex] = 3.7yards/s²
The acceleration of the plane is 3.7yards/s²
What circumstances must be in place for there to be a lunar eclipse?.
Answer:
When the Sun, the Earth, and the Moon are all aligned in space, a lunar eclipse occurs. The Moon reflects the Sun's light onto the Earth. The Earth gets in the way of the Sun in this case, keeping sunlight from reaching the moon. A lunar eclipse happens if this alignment is ideal.
Explanation:
Rephrased it so u dont have to<3 Hope this helped!
An airplane lands with an initial velocity of 70.0 m/s and then decelerates at 1.50 m/s2 for 40.0 s. What is its final velocity?
Answer:
10 m/s
Explanation:
vi = 70 m/s
a = -1.5 m/s²
t = 40 s
vf = vi + at
= 70 + (-1.5 x 40)
= 10 m/s
The final velocity will be "10 m/s".
Given:
Initial velocity,
[tex]v_i = 70 \ m/s[/tex]Deceleration,
[tex]a = -1.50 \ m/s^2[/tex]Time,
[tex]t = 40 \ s[/tex]As we know,
→ Final velocity, [tex]v_f = v_i+at[/tex]
By substituting the values, we get
[tex]= 70+(-1.5\times 40)[/tex]
[tex]= 70+(-60)[/tex]
[tex]= 70-60[/tex]
[tex]= 10 \ m/s[/tex]
Thus the above answer is appropriate.
Learn more:
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Which expression represents this?List the number of atoms for each element in CO2:
Carbon:
Oxygen:
Answer:Carbon
Explanation:
Carbon is CO2
How many elements does glucose contain
Answer:
three
Explanation:
It just is
Answer:
6 i think
Explanation:
How long does it take for mercury to revolve around the sun.
Answer:
88 days
Explanation:
Mercury take 88 days to revolve around the sun.
Which of the following accounting principles prescribes that a company record its expenses incurred to generate the revenue reported?.
Answer:
Matching principle
Explanation:
Matching principle is an accounting principle for recording revenues and expenses. It requires that a business records expenses alongside revenues earned.
see attached, thanks !!
A weight force of 10 N force acts on an object while the object moves 20m along horizontal ground. How much work is done by the weight force on the object? a) 0.5 J b) 2 J c) 10 J d) zero e) 200 J I already know it's not 200 J because I got the question wrong. Please show work!
Answer:
e) 200 J
Explanation:
Work done by a force on an object is the energy required for a force to move that object over a distance. It can be calculated using the formula:
W = F × d
Where; W = work done
F = force applied
d = distance
According to this question, F = 10N, d = 20m
W = 10 × 20
W = 200 J or N/m
How much force is needed to accelerate a 3kg skateboard at 5m/s2
F = ma
F = 3*5
F = 15 N
Hope it helps :)
Answer:
F=15
Explanation:
A student throws a ball up straight up. What happens to the ball's energy as it rises?
Answer:
B. The kinetic energy of the ball change into potential energy as the ball rises.
Explanation:
This can seem a little bit confusing at first, but once you understand Kinetic Energy, you'll get it right away. Kinetic Energy is energy an object has when it is moving. So for example, you have kinetic energy when you run, a pen has kinetic energy when you drop it in class, and the ball has kinetic energy as it rises.
However, because of outside forces, objects with kinetic energy will eventually lose it. These forces can be anything from friction as an object slides across a surface, to the negative acceleration due to gravity.
In this question, the force working against the motion of the ball is gravity. As you know, when you throw something up, it has to come down, because of gravity. As the ball goes up, it has enough kinetic energy that it continues its upward motion, however it slowly looses that energy, causing it to slow to a stop before falling back to the ground.
On the way up, the energy of the ball changes from this kinetic (moving energy) to what we call potential energy. Potential energy is exactly what is sounds like, it is the potential for something to begin moving. So, as the ball goes higher, it has a lower chance of continuing to go up (meaning it's loosing it's kinetic energy) and higher chance of falling back down (meaning it's gaining potential energy).
Hope this helps.
In your own words explain how "Carrying Capacity" plays a vital role in today's world and our future as well
Answer:??????
Explanation:
Which of the following types of galaxies are typically reddest in color?
- spirals
- irregulars
- ellipticals
Will mark brainliest!
Answer:
It's ellipticals!!
Explanation:
hope its right
PLASE HELP, DUE IN 10 min
What is the power of a bulb rated at 5 A, 6 V?
Answer:
30watts
Explanation:
P = IV = 5 x 6 = 30watts
differentiate gravitational force and acceleration due to gravity
Answer:
I hope this answer is correct
Explanation:
Difference Between Gravitation and Gravity
Gravitation is referred to the force acting between two bodies which can be represented as the F=(GM1M2)/R2 which means gravitation force is proportional to the product of the masses of the object 1 and object 2 and is inversely proportional to the square of the distance between them. The gravitational force between earth and any object is known as gravity.
Difference Between Gravitation and Gravity
Gravitation Gravity
It is a universal force It is not a universal force
It is a weak force It is a strong force
The force is F=(GM1M2)/R2 (G= gravitational constant) The force is F=mg (g=acceleration due to gravity)
The direction of gravitational force lies in the radial direction from the masses The direction of the force of gravity is along the line joining the earth’s center and the center of the body. Its direction is towards the center of the earth.
The force can be 0 when the separation between bodies is infinity The force of gravity can be 0 at the center of the earth
It requires two masses It requires only one mass
These were some difference between Gravitation and Gravity. If you wish to find out more, download BYJU’S The Learning App.
RELATED ARTICLES:
Gravity Acceleration Due to Gravity
What is wrong with the following diagram?
What is wrong with the diagram is : ( 4 )
The spot with the "maximum kinetic energy" should be on the lowest point of the roller coaster at the far left side on the bottom.Gravitational potential energy vs kinetic energyThe maximum gravitational potential energy is located at the highest peak which the roller coaster attains while as the roller coaster comes down from the peak the gravitational potential energy decreases while the kinetic energy increases.
The point at which the roller coaster should attain it maximum kinetic energy should be at the lowest point ( i.e far left side of the bottom ).
Hence we can conclude that error in the diagram is the spot with the "maximum kinetic energy" should be on the lowest point of the roller coaster at the far left side on the bottom.
Learn more about Kinetic energy: https://brainly.com/question/25959744
A gun with a muzzle velocity of 65.2 m/s is fired horizontally from a tower. Neglecting air resistance, how far downrange in meters will the bullet be 2.7 seconds later
Answer:
s ≈ 35.8 m
Explanation:
Let's apply the uniform acceleration equation to find the vertical height travelled after 2.7 seconds.
[tex]s = ut + \frac{1}{2}at^2[/tex]
s = distance travelled
u = initial vertical velocity
t = time taken
a = gravitational acceleration
The gun is fired horizontally, hence there is no initial vertical velocity.
[tex]s = 0(2.7) + \frac{1}{2}(9.81)(2.7)^2[/tex]
[tex]s = 35.75745 m[/tex]
s ≈ 35.8 m
The process of transfer of charges from a charged object to the earth is called
(a) earthing
(b) lightning
(c) oscillation motion
(d) electron movement
Answer:
Earthing
Explanation:
If a space rover has a mass of 3900 kg on Earth, then what is
its mass when it lands on Mars?
kg
Do not include units in your answer.
If a space rover has a mass of 3900 kg on Earth, then its mass when it lands on Mars will be the same i.e. 3900 kg.
What is mass?Mass is the amount of matter present in the object.
The mass of the object is always constant, anywhere it is on the Earth or Moon or any other planet.
Thus, If a space rover has a mass of 3900 kg on Earth, the mass on Mars when it lands will be 3900kg.
Learn more about mass.
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Relative density has no unit .why ?
Answer:
Relative density is a ratio of the density of a certain material to the density of a reference material. Relative density has no unit, because the units of the material in question cancel out with the units of the reference material. For example, say a cooking oil’s density is 0.9 g/cm^3.
Explanation:
Please i just need help
Answer:
The first one is A gravity does not effect wind and the second one is A also because the we know right a way that the moon is closest to Earth
Enlarged brain ventricles are presumed to signify __________. A. An excess of dopamine activity B. Frontal lobe abnormalities C. Development of brain tissue D. A deterioration of brain tissue.
Answer:
Enlarged brain ventricles are presumed to signify
____a deterioration of brain tissue____.
Explanation:
got it right
Enlarged brain ventricles are presumed to signify a deterioration of brain tissue. The correct option is D.
What is the deterioration of brain tissue?One or more of the ventricles swell as CSF builds up when an injury or sickness disrupts CSF circulation. Because the adult skull is stiff and cannot expand, the pressure inside the brain may significantly rise.
A chronic illness known as hydrocephalus causes fluid to accumulate in the ventricles deep inside the brain. It normally cannot be cured, but it can be controlled.
As a neurodegenerative disease that causes cognitive impairment and behavioral abnormalities, Alzheimer's disease is a progressive illness that impairs memory and other critical mental functions.
Therefore, the correct option is D. A deterioration of brain tissue.
To learn more about the deterioration of the brain, refer to the link:
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What is the volume of the shape below?
I think it is 18(c.m)2 but their is no unit for the length,width,height