Answer:
The charge that will pass through the wire will be approx. 0.003C.
Explanation:
Two equations are relevant to answer this question:
(1) The charge (Q) over a capacitance (C), given a voltage (U):
[tex]Q = C\cdot U[/tex]
and
(2) the capacitance of a parallel-plate capacitor:
[tex]C=\varepsilon \frac{A}{d}[/tex]
with [tex]\varepsilon[/tex] being the dielectric constant, A the plate area and d their distance.
We are given the capacitance when air is present (80 micro-Farad, or uF). The dielectric constant for air/vacuum is 8.84 pico-Farad per meter. Then someone sneaky slides a slab of dielectric medium with dielectric constant of 20 pF/m and connects a source of 30V. By inserting the slab, they increased the capacitance by a factor of 20/8.84=2.26, making it 2.26*80=181uF. By connecting it to the source 30V, they charged our capacitor to a charge
[tex]Q = C\cdot V = 181\cdot 10^{-6}F\cdot 30V=5.43\cdot 10^{-3}C[/tex]
but, the sneaky person changes his mind and removes the slab, effectively changing C down to the original 80uF. There is now excess charge on the capacitor that wants to leave! The steady-state charge on the air-filled capacitor should be:
[tex]Q_0 = C_0\cdot V = 80\cdot 10^{-6}F\cdot 30V=2.4\cdot 10^{-3}C[/tex]
The charge that will pass through the wire will be the difference:
[tex]Q-Q_0=(5.43-2.40)\cdot 10^{-3}C\approx 3\cdot 10^{-3}C[/tex]
As part of his meal, a workman has a cup containing a hot drink.
In order to keep the drink hot whilst he eats the rest of his meal, he covers the cup, as shown in
the figure.
Which sources of energy loss does this action reduce? Tick two boxes.
convection from the surface of the liquid
evaporation from the surface of the liquid
conduction through the cup
radiation from the surface of the cup
A workman has a cup containing a hot drink as part of his meal. In order to keep the drink hot whilst he eats the rest of his meal, he covers the cup, because of the evaporation from the surface of the liquid.
What is evaporation?Evaporation occurs in the liquid when the surface of the liquid is open to the surrounding environment. When evaporation occurs, the liquid releases the vapors into the surrounding, which leads to liquid cooling faster than liquid kept in a closed container.
When a hot liquid is placed in a non-insulated environment, it is subjected to a process of heat transfer.As a result, the molecules in the state of liquid get converted into a gaseous state, by evaporation.The higher the temperature of the surrounding, the faster the cooling rate.The evaporation does not stop until the liquid is brought back to room temperature.Hot water has energized atoms that are at an excited state, whereas in the process of reducing temperature the excited atoms get back to their ground state.To learn more about evaporation, refer to:
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How does a firm calculate its profit? total revenue minus marginal revenue variable cost plus total cost total revenue minus total cost marginal revenue minus marginal cost
The correct answer is total revenue minus total cost.
When a firm is calculating the profit they need to find the difference between how much money they earned and how much they spent. The difference between their total revenue and their total cost is their profit.
Answer:
The correct option is 3. A firm calculate its profit as " Total profit = Total revenue - Total cost".
Explanation:
Profit of a firm is financial gain. It is the difference between the total amount earned by the firm and the total amount spent in buying, operating, or producing something.
It other words, profit is the difference between total revenue and total cost.
A firm calculate its profit as
Total profit = Total revenue - Total cost
Where, total revenue is the sum of fixed and marginal revenue, total cost is the sum of fixed cost and marginal cost.
A firm calculate its profit as " Total profit = Total revenue - Total cost". Therefore the correct option is 3.
a dock worker pushes a 150.0 kg crate up a ramp that is 3.00 m high and 10.00 m long into the cargo bay of a ship. He exerts a 800.0 N force parallel to the ramp. find both the mechanical advantage and ideal mechanical advantage of the ramp. what is the efficiency of the ramp?
Efficiency: (2940 J / 3250 J) x 100% = 90.46%
The mechanical advantage of the ramp is 1.8375, the ideal mechanical advantage is 3.3333, and the efficiency of the ramp is 55.11%.
The mechanical advantage (MA) of a ramp is the ratio of the weight of the object being moved to the force required to move it up the ramp. The ideal mechanical advantage (IMA) is the ratio of the ramp's length to its height, assuming no friction. The efficiency of the ramp is the ratio of MA to IMA, expressed as a percentage.
To calculate MA:
First, find the weight of the crate, which is equal to mass times gravity (150.0 kg * 9.8 m/s2 = 1470 N).
Then, divide the weight by the applied force (1470 N / 800.0 N = 1.8375).
Therefore, MA=1.8375.
To calculate IMA:
Divide the length of the ramp by its height (10.00 m / 3.00 m = 3.3333).
Hence, IMA=3.3333.
To find the efficiency:
Divide MA by IMA (1.8375 / 3.3333 = 0.5511).
Multiply by 100 to get the percentage (0.5511 * 100 = 55.11%).
The efficiency of the ramp is therefore 55.11%.
Which best explains why the pencil seems bent?
a. light travels slower in air than glass
b. light travels faster in air than in water.
c. light travels at the same speed in all matter
d. Light travels at different speeds in water and in glass.
It travels faster in air than in water.
hope this helps :)
things must ______ for heat to transfer using this type of transfer
Answer:
convection is the answer of question
Answer:
Explanation:
Touch
A stone falling from a cliff increases speed until it reaches constant velocity, or terminal velocity. What does the stone’s motion tell you about the forces acting on the stone?
Since the stone is moving faster it is pushing through the air faster, which means it is going down faster.
you can make the current in a circuit smaller by?
Decreasing the amount of current flowing through the circuit by using a 5 volt battery instead of a 10 volt battery.
-- reduce the voltage of the battery or power supply
-- increase the resistance in the circuit
The primary difference between a scientific theory and a hypothesis is that a theory is: A prediction of an experimental outcome Not yet tested Well tested Not yet widely accepted by scientists
A hypothesis is a testable prediction based on observations while a scientific theory is a well-tested, widely accepted explanation of observed phenomena. The process of maturing from a hypothesis to a theory involves thorough testing and validation through the scientific method.
Explanation:The primary difference between a scientific theory and a hypothesis revolves around their levels of validation. A hypothesis is a testable prediction made based on observations. It is an educated guess that attempts to explain observed phenomena and bridges the gap between the realm of ideas and the real world.
On the other hand, a scientific theory is a widely accepted, well-substantiated explanation of some aspect of the natural world that has been affirmed through repeated testing and observation. Scientific theories are more comprehensive and well-established as they are the result of various tests and experiments that support their validity. While hypotheses are the initial, testable predictions, theories are the matured and validated outcomes of those tests.
It's essential to note that scientific theories can still be modified as new data becomes available through continued research and observation. This adaptability is a crucial part of the scientific method.
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What is the IMA of the following pulley system? 1 2 3 4
The answer is 2
I did this question today on my Odyssey ware, and I believe the explanation is that each supporting rope increases the IMA by 1
Answer:
IMA of pulley system is 3
Explanation:
The full form of IMA is ideal mechanical advantage. It is also defined as the ratio of output force to the input force. The mathematical expression is given by :
[tex]IMA=\dfrac{F_r}{F_e}[/tex]
For the pulley system, the IMA is equal to the number of ropes present in the pulley - mass system. So, it is quite easy to find IMA of the pulley i.e. just counting the number of ropes present in the system.
In the given figure, there are three ropes in the system. Hence, its IMA is 3.
An object in projectile motion will follow which path?
Answer:
curved down toward the ground
Explanation:
A projectile movement is a movement composed of a horizontal movement and a vertical movement. According to Galileo, if an object presents a compound movement, each of the component movements is performed as if the others did not exist and in the same interval of time. This is the principle of simultaneity.
When an object is cast horizontally, it describes a parabolic movement in relation to the Earth. Accordingly, we can conclude that an object in projectile motion will follow a curved path to the ground.
Answer:
B: curved down toward the ground
Explanation:
on edge2021! hope this helps!!~ ~ヾ(＾∇＾)
Explain why the phrase "by ordinary means" was added to the Law of Conservation of Energy
-it can only be converted from one form to another.
The phrase "by ordinary means" was added to the Law of Conservation of Energy because kind to be expected in the normal order of events.
What is mean by Law of Conservation of Energy and who proposed it?Law of Conservation of Energy law, first proposed and tested by Émilie du Châtelet, means that energy can neither be created nor destroyed; rather, it can only be transformed or transferred from one form to another. For instance, chemical energy is converted to kinetic energy when a stick of dynamite explodesThe conservation of energy formula goes Ki+Ui=Kf+Uf. U is potential energy and K is kinetic energy..The laws of conservation of energy, momentum, and angular momentum are all derived from classical mechanics.The phrase "by ordinary means" was added The phrase "by ordinary means" was added.
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Which of the following is the best example of kinetic energy? A book sitting on a bookshelf A golfer preparing to putt the ball A race car in position at the start line A satellite orbiting the Earth
sorry if im wrong but
D. A satellite orbiting the Earth.
I would have to say D. Kinetic energy is an energy that is associated with motion and in this case the only options that posses an energy in motion is D.
a drag racing vehicle travels from 0 100 mph in 5 seconds north. What is the acceleration
The formula to find accerelation is:
Accerelation= change in velocity÷change in time
the change in velocity here is: 100mph
the change in time is: 5 seconds
a=100÷5 ms
a= 20ms-2
Answer:
8.94m/s²
Explanation:
Acceleration is defined as the change in velocity of an object with respect to time. Mathematically,
Acceleration (a) = change in velocity(∆v)/time (t) where;
Change in velocity(∆v) = final velocity (v) - initial velocity (u)
a = ∆v/t = v-u/t
Given v = 100mph u = 0mph since the vehicle travels from 0mph to 100mph, t = 5seconds
Since 1mph = 0.447m/s
100mph = 44.7m/s
Substituting this values in the formula given we have;
a = 44.7-0/5
a = 8.94m/s²
Its acceleration is 8.94m/s²
How does a low pressure system determine the weather in an area?
Knowing areas of high and low air pressure is important to predicting the weather because differences in air pressure causes wind to form. ... This is because low pressure systems generally attract warm and moist air. On a weather map a low pressure system is shown by a red L.
A sound wave has a speed of 343 m/s in air. What is the wavelength of a sound wave with a frequency of 686 Hz
Wavelength is the distance between 2 adjacent points in a wave
we can use the following equation to find the wavelength of a sound wave
wavelength = speed / frequency
frequency is the number of waves passing a point in 1 second
substituting the values in the equation
wavelength = 343 m/s / 686 Hz
wavelength = 0.5 m
wavelength of the wave is 0.5 m
The wavelength of a sound wave with a frequency of 686 Hz traveling through air with a speed of 343 m/s is calculated using the formula extlambda = v / f, which gives a wavelength of 0.5 meters.
To find the wavelength of a sound wave with a given frequency, you can use the formula:
v = f imes ext{ extlambda}
Where v is the speed of sound in the medium, f is the frequency, and ext{ extlambda} (lambda) is the wavelength. Given that the speed of sound (v) in air is 343 m/s and the frequency (f) of the wave is 686 Hz, we can rearrange the equation to solve for the wavelength ( ext{ extlambda}):
ext{extlambda} = v / f
Plugging in the values:
ext{extlambda} = 343 m/s / 686 Hz
ext{extlambda} = 0.5 m
So, the wavelength of a sound wave with a frequency of 686 Hz traveling through air at a speed of 343 m/s is 0.5 meters.
If the index of refraction of a medium is 1.4, determine the speed of light in that medium.
4.2 x 108m/s
2.1 x 108m/s
4.7 x 10-9m/s
4.7 x 108m/s
The refractive index of a medium can be calculated by the use of the angle of incidence and angle of refraction, or the speed of light in air and the speed of light in the medium
The speed of light in air is 3×10⁸m/s.
then n= (speed of light in a air)/(speed of light in the medium.)
1.4=(3ₓ10⁸)/(speed of light in the medium)
speed of light in the medium=3ₓ10⁸m/s÷1.4= 2.1×10⁸m/s
=2.1×10⁸m/s
Locomotion is the act of staying stationary.
True
False
20 POINTS
Answer:
False
Explanation:
Locomotion is associated with movement.
The word is derieved from two Latin words,
Loco----place
Motio----to move.
You are cooking a pizza. You place your pizza on a metal tray at room temperature at put it in the oven. When the pizza is cooked you remove the pizza from the oven. Eventually it returns to room temperature again. Describe and explain in detail what happens to the motion of the particles in the metal tray.
when the tray is placed in the oven,the particles get heated their temperature increases hence their kinetic energy therefore the particles vibrate morer vigorously. When the tray is removed from the oven,it's temperature decreases, kinetic energy of the particles decreases hence they vibrate slowly.
* CRIMINOLOGY*
A mandatory minimum is _____.
A.the mandatory minimum number of jurors that serve on a federal jury
B.a minimum sentence that must be imposed by a judge if an individual is found guilty of the crime
C.the minimum number of individuals in a prison cell block
D.the number of guards required per 10 inmates
I think the answer is B.
Hope this helps.
A mandatory minimum is "a minimum sentence that must be imposed by a judge if an individual is found guilty of the crime".
Answer: Option B
Explanation:
Necessary minimum penalties are criminal sentences that involve minimum punishments determined by law. they'll apply to specific offences, specific offenders, or to explicit mixtures of offence and bad person characteristics.
The goal of those laws after they were developed was to push uniformity; it does not matter however strict or lenient your decide is, because the law and therefore the law alone determines the sentence you receive.
Which of the following provides evidence that crust is thin under the mid ocean ridge
A. Satellite images
B. Magnetic anomalies
C. Magnetic reversals
D. Gravity anomalies
D. Gravity anomalies.
Out of all choices, Gravity anomalies provide evidence that crust is thin under the mid ocean ridge.
Answer: Option D
Explanation:
Gravity promotes subduction zones. We can perform geological processes with the help of geological processes, because the process in which the oceanic crust moves to the mantle as soon as it collides with the continental crust.
Subduction destroys the ocean's crust, pushing it into the mantle in which it melts. It is said that the ocean's crust is weak because it contains more mafic minerals and is approaching its borders again. If there is a difference between the continental crust, the oceanic crust sank into the mantle.
how many reactants does the following equation have h2o → h2 + o2
A)1
B)2
C)3
A) 1 (one)
Explanation;Reactants are elements and/or compounds that are changed into other substances called products.The reactants are what you start with and the products are the result. In the chemical reaction equation the reactants are on the left and the products are on the right.In this case; H2O is the only reactant, while H2 and O2 are the products.What is the buoyant force on an object that weighs 340 N and is floating on a lake? if you could explain the answer that would be nice.
You just said that the object is "floating".
(As soon as you said that, a picture of a duck flashed through my mind. But then I knew right away that the duck could not be an accurate representation of the situation you're describing. 340 N would be some duck ... about 76 pounds ... and that duck would have been caught and eaten a long time ago. I mean ... what could a 76-pound duck do ? Could it fly away ? Could it run away ? ? Not likely.)
So it's not a duck, but whatever it is, it's just sitting there on the water, floating. What's important is that it's not accelerating up or down. THAT tells us that the vertical forces on it are balanced so that there's NO NET vertical force on it at all.
What are the vertical forces on it ? There's gravity, pulling it DOWN with a force of 340 N, and there's buoyancy, pushing it UP. The SUM of those two forces must be zero ... otherwise the object would be accelerating up or down.
It's not. So (gravity) + (buoyancy) must add up to zero.
The buoyant force on the object is 340 N UPward.
Two balloons are charged with an identical quantity and type of charge:-4 nC. They are held apart at a separation distance of 70 cm. Determine the magnitude of the electrical force of repulsion between them.
Final answer:
To find the repulsive force between two charged balloons, we employ Coulomb's Law, applying given values into the formula to calculate the force based on the charges' magnitudes and separation distance.
Explanation:
The question involves calculating the magnitude of the electrical force of repulsion between two balloons charged with an identical quantity and type of charge (-4 nC), and separated by a distance of 70 cm. To find this, we use Coulomb's Law, which states that the force between two charges is directly proportional to the product of the magnitudes of the charges and inversely proportional to the square of the distance between them
The formula for Coulomb's Law is given by F = k × (q1 × q2) / r², where F is the force between the charges, k is Coulomb's constant (8.987 ×510¹ N m² C²), q1 and q2 are the magnitudes of the charges, and r is the distance between the charges. Inserting the given values (-4 nC for each charge and 0.7 meters for r):
F = (8.987 × 10¹) × ((-4 × 10⁻⁹) × (-4 × 10⁻⁹)) / (0.7)²
Calculation results in the repulsive force magnitude, which is what the question is seeking. It's important to remember that since the charges are identical in magnitude and type, the force calculated will be repulsive.
In order to move a bag of dog food across a 10 meter room, you apply 20 newtons of force. How much work was done? (2 points)
Work in physics is defined as force times distance (there is also an angle but that doesn’t seem applicable here). In this case:
W = F•d
W = (20 N)(10 m)
W = 200 Nm or 200 joules
200 joules of work was done on the bag of dog food.
Hope this helps!
Answer:
i have seen people put its 2joules, well it not 2, its 200joules bc their asking how much work was done so u need to multiply not dived
Explanation:
Under which condition does a light ray striking a concave mirror reflect off parallel to the principle axis ?
The answer would be c if u need to know
Answer:
When the incident ray passes through the focal point
Explanation:
A concave mirror has an inward curved surface that reflects the light making it converge at a focal point. It is characterized by the fact that, unlike convex mirrors, concave mirrors show images of different shapes depending on the distance between the object and the mirror.
When the object is at the same focal point, the reflected rays are parallel and never cross, so no image is formed, or in other words, it is reflected parallel to the main axis.
What is cosmic ray spallation
Cosmic ray spallation is a form of naturally occurring nuclear fission and nucleosynthesis
How was the teapot dome scandal discovered and resolved?
The Teapot Dome Scandal of the 1920s shocked Americans by revealing an unprecedented level of greed and corruption within the federal government. Albert Fall, a former Secretary of the Interior, was charged with accepting bribes from oil companies in exchange for exclusive rights to drill for oil on federal land.
HOPE THIS HELPED!!! XD
Answer:
The Teapot Dome scandal was a corruption scandal discovered in 1922 during Harding administration. The scandal originated from the sale of land owned by the United States Navy in Wyoming and California by Interior Minister Albert Bacon Fall at a substandard price and direct appointment to a private oil company. Secretly, Fall sold the land in Wyoming to oil entrepreneurs from Mammoth Oil Company and then two fields in California to Pan-American Petroleum Company. This scandal was revealed in the public after the senate held a deep and further investigation.
Domestic Minister Albert B. Fall requested resignation in March 1923, and served a year in prison for corruption.
The scandal also weakened the general picture of the Harding administration, which has already begun to decline in popularity due to the action of the Great Railroad Strike in 1922 and the President's veto on the issue of Bonus Act of 1922.
A boy on a bicycle rides at 21.1m/s distance of 87.9m how long does it take
Answer is t=4,2 seconds
Due to
t=X/V
t=(87,9)/(21,1)
t=4.2 segs
Best regards
4.2 seconds! Hope this helps
What Characteristics do gasses and plasma have in common
Plasma's are a lot like gases, but the atoms are different, because they are made up of free electrons and ions of an element such as neon. Plasma is different from a gas, because it is made up of groups of positively and negatively charged particles. In neon gas, the electrons are all bound to the nucleus.
Hope this helps:)
An atom gains an additional electron. What is the overall charge of the ion that is formed?
An is formed when an atom loses or gains one or more electrons. Because the number of electrons in an ion is different from the number of protons, an ion does have an overall electric charge. Consider how a positive ion can form from an atom. The left side of the illustration below represents a sodium (Na) atom
It is a negative ion