Answers
1. because A is more negative than B. A is -1000 V (we can imagine that A has excess 1000 electrons), in other, B which +3000 V can be assume that B need 3000 elctrons to be neutral. So, the electron will flow from A to B.
2. Electrons being negatively charged flow from the negative terminal to the positive terminal of the voltage source. So, the actual direction of current should be from negative to positive terminal. However, the conventional direction had already been established. So, the current flow is considered in the direction opposite to the direction of flow of electrons. (from topperlearning dot com)
Related Questions
A student is producing a power rating of 100 W. What will be the student's power rating if she performs 3 times the work in twice the amount of time?
Answers
What is the expermintal example of Zeeman effect?
Answers
Answer:
When the spectral lines are absorption lines, the effect is called inverse Zeeman effect.
The wavelength of radio waves sent out by an AM station is 600 meters (v = 3.0 x 10^8 m/s). At what frequency is the radio station broadcasting?
Answers
Answer:
500,000 hertz
Explanation:
Wavelength= 600 meters
Velocity(b) = 3 × 10^8
Frequency=?
Therefore the frequency can be calculated as follows
Velocity= frequency × wavelength
Frequency= 3 × 10^8/600
= 500,000 hertz
Hence the frequency is 500,000 hertz
The charge on the sphere is monitored as a beam of monochromatic light shines on the sphere. Initially nothing happens. The wavelength of the light is slowly decreased. When the wavelength reaches a certain value, a positive charge is suddenly measured on the sphere. The wavelength is then held constant, and the charge continues to increase at a constant rate. The intensity of the beam is then increased without the wavelength being changed, and the rate of increase of the charge becomes greater.
In a coherent paragraph-length response, describe the cause of the charge on the sphere and the changes in the observations about the charge, in terms of physics principles.
Answers
Answer:
explanation of this effect is the photoelectric effect
Explanation:
Let's describe the process, when light of large wavelength falls, this implies a small energy, according to Planck's equation
E = h f = [tex]\frac{h \ c}{ \lambda}[/tex]
the energy of the photons is not enough to carry out an electronic transition between two states of the material, when we decrease the wavelength (the energy of the photons increases), the point is reached where the energy of the beam is equal to some energy of a transition, by which the electrons are promoted and since we can see a certain charge, as the atoms are neutral, some electrons must be removed from the material, this is represented in the macroscopic case as the work function of the material, consequently a unbalanced load that is what we can measure.
When we increase the lightning intensity, what we do is that we increase the number of photons and if each photon can remove an electron, by removing the electrons the difference between it and the positive charge (fixed in the nuclei) increases.
We can analyze the interaction of the photon and the electron as a particular collision.
The explanation of this effect was made by Einstein in his explained of the photoelectric effect
i need written answer with solution:-
a person walks 750m due north then 250 m due east of the entire walk takes 12 min find the person average velocity
Answers
Answer:
~65.9m/min
Explanation:
Excuse the messy handwriting!
3. A backpack weighs 8.2 N and has a mass of 5 kg on the moon. What is t
strength of gravity on the moon?
8.2 N
Answers
Using:
F = ma
a = 8.2 / 5
a = 1.64 N/kg
The gravitational field strength is equivalent to 1.64 N/kg.
what will it be the critical angle if light is incident from glass n=1.5 in to the air n=1
Answers
Answer:
The formula, which is fairly easy to derive, is:
The sine of the critical angle = refractive index of the “refracting medium” divided by refractive index of the “incident medium”.
In this case the “refractive medium” is air and the “incident medium” is glass.
The refractive index of air is about 1 (almost exactly).
So, in this case, the sine of the critical angle is 1 divided by 1.5 = 0.6667.
You will find the answer, from sine tables, to be approximately 41.81 degrees.
Remember that the refractive index of air is slightly more than 1. Using a better value for refractive index of air, I get the critical angle to be about
Assume that a person bouncing a ball represents a closed system. Which
statement best describes how the amounts of the ball's potential and kinetic
energy change?
O A. The ball's kinetic energy increases as it falls and its potential
energy decreases.
B. The ball's potential energy decreases as it rises and its kinetic
energy increases.
C. Both the kinetic and potential energy of the ball decrease.
D. Both the kinetic and potential energy of the ball increase
Answers
Answer:
I know that it is A
Explanation:
A water park rider (mass = 20.0 kg) starts from rest at the top of a 48.0-m tall
water slide (A). The height at B is 16.0 m. Assuming mechanical energy
conservation, determine the potential energy (PE) and kinetic energy (KE) values
at locations A, B and C. Use g = 10.0 N/kg.
Answers
This question involves the concept of the law of conservation of energy.
The potential energy at A,B,C is "9.6 J","3.2 KJ","0 KJ", respectively.
The kinetic energy at A,B,C is "0 KJ","6.4 KJ","9.6 KJ", respectively.
What is the law of conservation of energy?The law of conservation of energy states that total energy of the system at any instant must remain constant.
At point AAt point A, the rider is at rest at a height of 48 m on top of the slide. So the kinetic energy of the rider must be 0 KJ. And the potential energy will be given as follows:
[tex]P.E=mgh[/tex]
where,
P.E = potential energy = ?m = mass = 20 kgg = 10 m/s²h = height = 48 mTherefore,
[tex]P.E = (20\ kg)(10\ m/s^2)(48\ m)\\[/tex]
P.E = 9600 J = 9.6 KJ
At point B
The potential energy at point B will be:
[tex]P.E=mgh[/tex]
where,
P.E = potential energy = ?m = mass = 20 kgg = 10 m/s²h = height = 16 mTherefore,
[tex]P.E = (20\ kg)(10\ m/s^2)(16\ m)\\[/tex]
P.E = 3200 J = 3.2 KJ
According to the law of conservation of energy the rest of the total energy shall be converted to kinetic energy:
K.E = 9.6 KJ - 3.2 KJ
K.E = 6.4 KJ
At point CAt the lowest point C of the ride, the potential energy will become 0 KJ, and the whole energy shall be converted to kinetic energy, that is 9.6 KJ.
Learn more about the law of conservation of energy here:
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A person holds a 0.300 kg pomegranate at the top of a tower that is 96m high. Another person holds a 0.800 kg melon next to an open window 32m up the tower
Answers
Complete question:
A person holds a 0.300 kg pomegranate at the top of a tower that is 96m high. Another person holds a 0.800 kg melon next to an open window 32m up the tower.
Calculate the gravitational potential energy of the pomegranate and melon.
Answer:
The gravitational potential energy of pomegranate is 282.24 J
The gravitational potential energy of melon is 250.88 J
Explanation:
Given;
mass of the pomegranate, m₁ = 0.3 kg
height of the pomegranate, h₁ = 96 m
mass of the melon, m₂ = 0.8 kg
height of the melon, h₂ = 32 m
The gravitational potential energy of pomegranate is calculated as;
P.E₁ = m₁gh₁
P.E₁ = 0.3 x 9.8 x 96
P.E₁ = 282.24 J
The gravitational potential energy of melon is calculated as;
P.E₂ = m₂gh₂
P.E₂ = 0.8 x 9.8 x 32
P.E₂ = 250.88 J
the one that answered this is correct so give him credit not me
Answer:
Complete question:
A person holds a 0.300 kg pomegranate at the top of a tower that is 96m high. Another person holds a 0.800 kg melon next to an open window 32m up the tower.
Calculate the gravitational potential energy of the pomegranate and melon.
The gravitational potential energy of pomegranate is 282.24 J
The gravitational potential energy of melon is 250.88 J
Given;
mass of the pomegranate, m₁ = 0.3 kg
height of the pomegranate, h₁ = 96 m
mass of the melon, m₂ = 0.8 kg
height of the melon, h₂ = 32 m
The gravitational potential energy of pomegranate is calculated as;
P.E₁ = m₁gh₁
P.E₁ = 0.3 x 9.8 x 96
P.E₁ = 282.24 J
The gravitational potential energy of melon is calculated as;
P.E₂ = m₂gh₂
P.E₂ = 0.8 x 9.8 x 32
P.E₂ = 250.88 J
the one that answered this is correct so give him credit not me
The parallel plates in a capacitor, with a plate area of 7.90 cm2 and an air-filled separation of 2.70 mm, are charged by a 7.90 V battery. They are then disconnected from the battery and pulled apart (without discharge) to a separation of 8.80 mm. Neglecting fringing, find (a) the potential difference between the plates, (b) the initial stored energy, (c) the final stored energy, and (d) the work required to separate the plates.
Answers
Answer:
A) 26V
Explanation:
(a) the potential difference between the plates
Initial capacitance can be calculated using below expresion
C1= A ε0/ d1
Where d1= distance between = 2.70 mm= 2.70× 10^-3 m
ε0= permittivity of space= 8.85× 10^-12 Fm^-1
A= area of the plate = 7.90 cm2 = 7.90 ×10^-4 m^2
If we substitute the values we
C1= A ε0/ d1
=( 7.90 ×10^-4 × 8.85× 10^-12 )/2.70× 10^-3
C1=2.589 ×10^-12 F= 2.59 pF
Initial charge can be determined using below expresion
q1= C1 × V1
V1=2.589 ×10^-12 F
V1= voltage=7.90 V
If we substitute we have
q1= 2.589 ×10^-12 × 7.90
q1= 20.45×10^-12C
20.45 pC
Final capacitance can be calculated as
C2= A ε0/ d2
d2=8.80 mm= /8.80× 10^-3
7.90 ×10^-4 × 8.85× 10^-12 )/8.80× 10^-3
C1=0.794 ×10^-12 F= 0.794 pF
Final charge= initial charge
q2=q1 (since the battery is disconnected)
q2=q1= 20.45 pC
Final potential difference
V2= q/C2
= 20.45/0.794
= 26V
Can someone answer this fast please
Answers
What is the magnitude of the resultant vector? Round
your answer to the nearest tenth.
m
R
5 m
13 m
Intro
Done
Answers
Answer: 13.9 m
Explanation:
Answer:
13.9m
Explanation:
Answer on Edge
Enter your passwor
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What happens when you move two
objects far apart from each other?
A. The force of gravity increases.
B. The force of gravity decreases.
C. Distance does not affect the force of gravity.
D. The friction between the two objects will increase.
Answers
Answer:
C. Distance does not affect the force of gravity.
1. An astronaut is getting ready to explore. If his mass is 60 kg, what is his weight
on Earth?
Answers
Answer:
The mass of an object is the same on Earth, in orbit, or on the surface of the Moon. ... 1N=1kg ⋅m/s2. 1 N = 1 kg · m/s 2 . ... The gravitational force on a mass is its weight. ...Explanation:
ILY:)Weight= (60 kg) (9.8 m/s2)
Weight= 588
why efficiency of electrons causes negative charge
Answers
Answer:
Since opposite charges attract each other, the negatively charged electrons are attracted to the positively charged protons. ... Together, all of the electrons of an atom create a negative chargethat balances the positive charge of the protons in the atomic nucleus.
Explanation:
WILL MARK YOU BRAINLIEST
Describe the importance and reliability of systems that use digital signals to store information. (Include the advantages of storing information digitally, as opposed to physical copies.)
Describe three instances of digital transmission and storage in your everyday life. Be sure to explain how you know data transmission or storage is occurring in each instance.
Explain how radio waves and digital signals will store and transmit this assignment to your instructor.
Describe how wave behavior and interactions can affect the quality of a signal received by a mobile device.
A medical office is planning to convert to an electronic database to store patient information. What are the pros and cons to making changes in this form of storage of personal medical information instead of written physical files? Provide evidence based on your knowledge of digital storage to support your reasoning.
As seen in the lesson video, solar photovoltaic technologies help provide clean electrical energy. Using the video animation as a guide, diagram and label the absorption of photons and production of electrons (photoelectric effect) used in solar PV systems. Include a screen shot or picture of your diagram below.
Answers
Digital signals are a more reliable form of transmitting information because an error in the amplitude or frequency value would have to be very large in order to cause a jump to a different value. Signals are composed of infinite possible values. ... Sound signals can vary smoothly in volume and pitchAdvantages to using digital signals, including digital signal processing (DSP) and communication systems, include the following:
Digital signals can convey information with less noise, distortion, and interference.
Digital circuits can be reproduced easily in mass quantities at comparatively low costs.
Answer:
it is easy to change the data if you have the right computer programs
Explanation:
A 34kg crate resting on a horizontal surface is pushed as shown. If the coefficient of static friction s between the surfaces is 0.25, what is the minimum force (Fs) required to start the motion?
1
a.
1332.80N
b.
83.30N
c.
8.50N
d.
136.00N
Heeelppp plzz
Answers
Answer:
D (not so sure, look in the explanation and judge yourself)
Explanation:
Assume that the acceleration due to gravity is 9.81 m/s^2 downwards
Minimum force required = 0.25 x 34 x 9.81
= 83.385 N
So technically the force need to be greater than 83.385 so the answer should be d, not really sure if it should be b though really depends on the acceleration due to gravity.
How much heat does it lose to change 126 g of water from 67°C to 37°C?
Answers
Explanation:
convert gram into kg q means amount of heat lost
The National Institute of Health is testing sensors which measure the energy felt by goalkeepers when blocking soccer balls coming at them and the velocity of soccer balls. One sensor measuring velocity is inside a 16 ounce soccer ball, which is kicked by a player at an initial velocity of 31 m/s. The ball bounces off the goalkeeper at a final velocity of 2.25 m/s. How much energy in Joules should the sensor say the goalkeeper absorbed, not accounting for wind and drag
Answers
Answer:
E = 216.76 J
Explanation:
The amount of energy absorbed by the goalkeeper will be equal to the difference between the initial and the final kinetic energy of the ball.
[tex]Energy\ Absorbed = Initial\ Kinetic\ Energy - Final\ Kinetic\ Energy\\Energy\ Absorbed = E = \frac{1}{2}mv_{i}^2 - \frac{1}{2}mv_{f}^2\\E = \frac{1}{2}m(v_{i}^2 - v_{f}^2)\\[/tex]
where,
m = mass of ball = (16 ounce)(0.0283495 kg/1 ounce) = 0.4535 kg
vf = final velocity = 2.25 m/s
vi = initial velocity = 31 m/s
Therefore,
[tex]E = \frac{1}{2}(0.4535\ kg)[(31\ m/s)^2 - (2.25\ m/s)^2][/tex]
E = 216.76 J
5j-Tj=6j+3 Tj
Determine the value of T from the given vector
Answers
Solve for j and Tj than you have
-j=4Tj
4T=-j/j
4T=-1
T=-1/4
As Carlos and Manual both push a 4 kg box to the right across a rough floor, the box speeds up at a rate of 2.0 m/s2.(Hint, this is the acceleration.) If you assume that Manual pushes with a force strength of 8.0 N and the friction force of the floor on the box is 5.0 N, then what is the strength of the force that Carlos pushes on the box
Answers
Answer: 5 N
Explanation:
Given
Mass of box [tex]m=4\ kg[/tex]
acceleration of box [tex]a=2\ m/s^2[/tex]
Force applied by Manual [tex]F_m=8\ N[/tex]
Friction force [tex]f=5\ N[/tex]
The net force on the block is [tex]F_{net}=m\times a=4\times 2=8 \N[/tex]
Suppose [tex]F_c[/tex] is the force applied by Carlos
[tex]\Rightarrow F_m+F_c-f=F_{net}\\\Rightarrow F_c=F_{net}-F_m+f\\\Rightarrow F_c=8-8+5=5\ N[/tex]
The strength of the force that Carlos pushes on the box will be [tex]F_c=5\ N[/tex]
What is force?The force is defined as the external effort applied on any object to move it or to restrict it.
Here following information is given in the question:
Mass of the box m=4 kg
The acceleration of the box [tex]a=2\ \frac{m}{s^2}[/tex]
The force applied by the Manual [tex]F_m=8\ N[/tex]
The frictional force is [tex]F_f=5\ N[/tex]
The net force on the body will be calculated by
[tex]F_{net}=m\times a=4\times 2=8\ N[/tex]
The force that Carlos pushes on the box will be calculated by the equilibrium of the forces:
[tex]F_m+F_c-F_f=F_{net}[/tex]
[tex]8+F_c-5=8[/tex]
[tex]F_c=5\ N[/tex]
Thus the strength of the force that Carlos pushes on the box will be [tex]F_c=5\ N[/tex]
To know more about forces follow
https://brainly.com/question/388851
Two football players collide head-on in midair while chasing a pass. The first player has a 110 kg mass and an initial velocity of 4.40 m/s in the positive x direction, while the second player has a 135 kg mass and initial velocity of 3.30 m/s in the negative x direction.
Required:
What is the x component of their velocity just after impact if they cling together?
Answers
Answer:
v = 0.16 m/s in the positive x direction.
Explanation:
Assuming no external forces acting during the collision, total momentum must be conserved.Initial momentum can be expressed as follows:[tex]p_{o} =m_{1} * v_{o1} + m_{2} * v_{o2} (1)[/tex]
Since both players move only horizontally, (1) can be expressed in terms of the velocities in the x- directions only, taking into account that player 1 moves in the positive x-direction, and player 2 in the opposite direction, and assuming that positive velocities are in the positive x-direction also:[tex]p_{o} =110 kg * 4.4 m/s + 135 kg * (-3.3 m/s) (2)[/tex]
Since total momentum must be conserved, the final momentum must be equal to the initial one.We know that both players cling together after colliding, so the collision is totally inelastic.So, the final momentum can be expressed as follows:[tex]p_{f} =( m_{1} + m_{2} )* v_{f} (3)[/tex]
Replacing by the givens in (3), we get:[tex]p_{f} =( m_{1} + m_{2} )* v_{f} = (110 kg + 135 kg)* vf (4)[/tex]
Since (3) must be equal to (4) we can solve for vf, as follows:[tex]v_{f} = \frac {110 kg * 4.4 m/s + 135 kg * (-3.3 m/s) }{(110 kg + 135 kg)} = 0.16 m/s (5)[/tex]
Since the initial momentum has only component in the x-direction, the final one must have component in the x-direction only too.This means that vf is in the x-direction, and due to it is positive, it must aim in the positive x-direction.So, vfx = +0.16 m/sWhich type of reaction is this formula an example of?
CH3OH + O2→CO2 + 2H2O + heat
Answers
Explanation:
This is an exothermic reaction. An exothermic reaction is one which releases heat to the surroundings. When CH3OH reacts with O2, heat is released on the product side of the reaction.
a box is slides down a slope
Answers
Answer:
120 N
Explanation:
From the question given above, the following data were obtained:
Angle (θ) = 35°
Mass (m) = 15 Kg
Acceleration due to gravity (g) = 9.8 m/s²
Normal force (N) =?
The normal force acting on the object can be obtained as:
N = mg × Cosθ
N = 15 × 9.8 × Cos 35
N= 147 × 0.8192
N = 120 N
Therefore, the normal force acting on the object is 120 N
Which is NOT true of electricity?
It allows us to see with candles and kerosene lamps.
Humans did not invent electricity.
It’s a form of energy.
Lightning and thunder are examples of electricity.
plsssssssssss answer correct plss i want correct answers only not in a meen way
Answers
Answer:
option A is correct answer of this question
Explanation:
=> it allows us to see with candles and kerosene lamps
hope it helps
Water is kept in a vessel at a temperature of 100°C. What would happen if a metal ball having a temperature of 30°C is dropped in it? Mention the direction of the heat flow.
Answers
Answer:
there will be a heat flow from water to the metal ball...
When a baseball hits a
baseball glove, what is the
reaction force?
A. The ball pushes onto the glove.
B. The glove pushes against the ball.
C. The ball falls to the ground.
at for every
reaction.
all at the
his glove.
Answers
Hope that helps :)
What does efficient mean in your own words in science
Answers
Answer:
Efficient means something that gives 100% accuracy.
How do sociologists view the categories of race, class, and gender?
Multiple Choice
1. inherent and inevitable
2. socially constructed
3. unchangeable and perpetual
4. natural and biologically determined
Answers
Answer:
2. Socially constructed
Explanation: