The potential difference that stopped electron is 1.422v
potential difference in between two points is the amount of work done is moving a unit charge from one point to another point.
The mass of the electron,
m = 9.109*10⁻³¹
Va (initial speed) = 500,000 m/s
Vb (final speed) = 0 m/s
Electron has been stopped because the electrons move from higher potential to lower potential.
by the work energy theorem
W = ½ mv² (1 equation)
The Potential difference is
W = eV
V = W/e
put the value of W form equation 1.
[tex]V = \frac{\frac{1}{2} (V_{b} ^{2} - V_{a} ^{2} )}{e}[/tex]
e = 9.109*10⁻³¹
V = 1/2 [(500000m/s²) - 0m/s² ] / 9.109*10⁻³¹
V = 1.422v
The potential difference that stopped electron is 1.422v
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A porg (bird like creature) has an acceleration of 1.2 m/sec/sec, to the right. The animal is moving at 0.8 m/sec to the
5.0 seconds later, it is moving at 6.8 m/sec to the right. Calculate the porg's average speed.
The Average Speed of the Porg is 3.8 m/s.
Let us say that the initial speed is u which is equal to 0.8 m/s and the final speed of the porg to be v which is equal to 6.8 m/s.
The total time period of the motion is given to us as 5 seconds. Let us represent the acceleration of the body as a, acceleration of the body given is 1.2m/s².
Here since the direction of the motion is not changing and the acceleration is constant, we can use the kinematic equations of motion.
Let say that the body covers distance d in 5 seconds.
To find the distance covered by the body we will use the equation,
v²-u²=2da
Putting all the values,
(6.8)²-(0.8)²²=2(1.2)d
46.24 - 0.64 = 2.4d
45.6 = 2.4d
d = 19m
The distance covered by the porg is 19 meters.
Now let say Average Speed is S.
As we know, the average speed of the body (S) = Total distance covered(d)/total time taken(t)
S = d/t
Average speed = 19/5
Average sped = 3.8 m/s.
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the Heat required to raise the temp. of 20 g water from 25 C to 36 C
Explain how inductive reasoning is inferior to deductive reasoning in establishing theory.
Answer: Created Fall 2016 by Ronald Wilson Inductive reasoning uses a set of specific observations to reach an overarching conclusion; it is the opposite of deductive reasoning. So, a few particular premises create a pattern which gives way to a broad idea that is likely true.
Explanation: No explanation lol. But I hope this is helpful!
the armature windings of a dc motor have a resistance of 6.5 ω . the motor is connected to a 120-v line, and when the motor reaches full speed against its normal load, the back emf is 108 v. the load is increased so it causes the motor to run at half speed.
The current in the load will be 10 A.
given,
resistance of the load (R) = 6.5Ω
voltage in the load (V) = 120V
Back emf in the load (E)= 108V
now to measure current we will use the formula
current (I)= {voltage (V)-Back emf (E)}/resistance(R)
now as the speed is halved so will the back electro motive force will be halved.
i.e.
back electro motive force will be = 108V/2
=54V
now,
substituting this value in the formula we get,
current (I) = (120-54)/6.5
current (I) = 66/6.5
current (I) =10A
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Please help me I need it
Answer:
Parallel circuits :)
which of the following is not an electromagnet device
Answer:
[tex]\textbf {Engine}[/tex]
Explanation:
Electric motor in cars is an example of electromagnetic device.
Hey everyone,
right now
I want you to stop
stop whatever you are doing
walk to a mirror
look in it
look at your face
your gorgeous face
look at your eyes
how they shine
look at your hair
it's perfect
you are beautiful
I hope you realize
you are pretty freakin amazing <3
Answer:
oooh thanks
Explanation:
..................
Answer:
awwww thx you are to :)
Explanation:
The peregrine falcon can reach speeds up to 107 m/s during a dive, how much time does it take the falcon to reach prey that is 1500 meters away?
Sheila uses a 45N force on her bowling ball across a 15m lane. What work did she do on the bowling ball? Show your work.
Answer:
675J
Explanation:
Given parameters:
Force = 45N
Distance = 15m
Unknown:
Work done by Sheila = ?
Solution:
Work done by a body is the amount of force applied to make a body move through a distance;
Work done = Force x distance
Now;
Work done = 45 x 15 = 675J
De manera individual subraya la respuesta correcta: A) El Método Científico de la física experimental y su búsqueda de respuestas tiene un principio básico que es: a. La ciencia. b. Una pregunta. c. La objetividad. d. El conocimiento.
Answer:
a. La ciencia.
Explicación:
El método científico de la física experimental y su búsqueda de respuestas tiene un principio básico que es la ciencia. La ciencia es la aplicación del conocimiento del mundo natural y social siguiendo una metodología sistemática basada en evidencias. Sin evidencias no hay aceptación de la observación ni se debe hacer teoría porque la evidencia es el principal criterio para aceptar o rechazar una hipótesis.
Suppose we have a 600 kilogram great "yellow" shark swimming to the right at a speed of 3 meters traveled each second as it tries to get lunch. An unsuspecting 100 kilogram blue fin tuna is minding its own business swimming to the left at a speed of 0.5 meters traveled each second. GULP! After the great "yellow" shark "collides" with the blue fin tuna, what is the velocity of the well fed shark?
Answer:
2.64 m/s
Explanation:
Given that a 600 kilogram great "yellow" shark swimming to the right at a speed of 3 meters traveled each second as it tries to get lunch. An unsuspecting 100 kilogram blue fin tuna is minding its own business swimming to the left at a speed of 0.5 meters traveled each second. GULP! After the great "yellow" shark "collides" with the blue fin tuna
Momentum = MV
Momentum of the yellow shark before collision = 600 × 3 = 1800 kgm/s
Momentum of the tun final before collision = 100 × 0.5 = 50 kgm/s
Total momentum before collision = 1800 + 50 = 1850 kgm/s
Let's assume that they move together after collision. Then,
1850 = ( 600 + 100 ) V
1850 = 700V
V = 1850 / 700
V = 2.64285 m/s
Therefore, the momentum of the shark after collision is 2.64 m/ s approximately
Gravity accelerates any object falling at 9.8 m/s2. What is the force that will be applied to the ground if an 88 kg box falls from the top of a shelf to the ground?
Answer:
The force is of the weight 862,4 Newtons.
Explanation:
We have the formula:
w = m * g
Data:
w = weight = ¿?
m = mass = 88 kg
g = gravity = 9,8 m/s
Replacing according formula:
w = 88 kg * 9,8 m/s
Resolving:
w = 862,4 N
Fill in the missing word. Nuclear fusion is difficult to achieve because at low temperatures and pressures
the positively charged nuclei of deuterium and tritium electrostatically
each other.
Answer:
Nuclear fusion is difficult to achieve because at low temperatures and pressures the positively charged nuclei of deuterium and tritium electrostatically each other is explained below in complete details.
Explanation:
For nuclear fusion to happen, very eminent temperatures are needed to succeed the opposing force between the positively energized nuclei of a specific isotope. Fusion doesn't release dangerous toxins like co2 or other greenhouse gases into the environment. Its significant by-product is helium: an inactive, non-toxic gas. No long-lasting radioactive ruin: Nuclear fusion reactors generate no high action, long-lived nuclear ruin.
Answer:
repel
Explanation:
its called electrostatic repulsion
Which astronomer measured the motion of stars in the sky?
A. William Herschel
B.Harlow Shapley
C.Vesto Slipher
D. Edwin Hubble
Edwin Hubble was the astronomer which measured the motion of stars in the sky and is therefore denoted as option D.
What is Astronomy?This refers to an aspect of a science called natural science and is the study of celestial bodies such as the moon, stars etc and the different phenomena which occurs between them.
An astronomer called Edwin Hubble was responsible for the measurement of the motion of stars through when he was in the process of the formulation of his law which involves the determination of distances to galaxies and quasars which is therefore the reason why option D was chosen as the correct choice.
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Science: due in 5 minutes plz help me!
just in 2-5 sentences is ok Thank you!!!
Answer:
Explanation:
When the sun rises every morning, it brings light and heat into earth. Plants need energy to live, so they convert the sun's light into chemical energy. (photosynthesis). Then animals eat those plants. Without the sun, we would not have any food, and very little sources of light.
The reason that objects tend to rest in our daily lives is because there are
unbalanced forces acting on them.
true or false?
Answer:
True
Explanation:
An object at rest will stay at rest unless acted on by an unbalanced force.
what yall notice about this please help me out
Answer:
There is a blue sky with clouds
There is cracks in the ground and the ground is brown
There is stuff in the dictance
Explanation:
Hope this helps
your physics class is conducting an experiment on the energy exchange between colliding objects. you and your classmates have identical materials and are experimenting with identical conditions. you perform three trials, and your data is different in each trial. you compare results with your peers and find that everyone has different data.
The scientific experiment is limited due to common sources of errors.
The use of unreliable measurement equipment is one of the causes of incorrect data . Instrumental, environmental, procedural, and human errors are frequent causes. Depending on how they impact the outcomes, each of these mistakes can either be random or systematic. Additionally, mistakes might be made when capturing observations or data. In doing an experiment on the exchange of energy between colliding objects, something unexpected happened.
In this experiment, the observation technique or the equipment used to record the data are wrong, which gives us false findings, leading us to the conclusion that the scientific experiment is constrained by the usage of the same observation technique and instrument.
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A 6.8 kg cannon ball leaves a canon with a speed of 188 m/s. Find the average net force applied to the ball if the cannon muzzle is 4.2 m long.
i want the answer with the steps
Answer:
its not long dummy, its your imagination
Explanation:
If the total mechanical energy of the system is 100 J: Where does the pendulum have 100 J of kinetic energy? Where does the pendulum have 100 J of potential energy? (Label both points.)Where does the pendulum have 50 J of potential energy? (Label both
Answer:
See image and explanation
Explanation:
A simple pendulum consists of a string to which a bulb is attached and the string is tied to a support. The string swings from one end to the other as shown.
At the both ends, the energy of the pendulum is all potential. Hence we have 100J potential energy at both ends.
When the pendulum is in motion, the energy is all kinetic at the center of motion. Hence at that point, we have 100J kinetic energy.
In between both extremes the energy is both kinetic and potential as shown. The total energy is this a summation of the two.
Answer:
A simple pendulum consists of a string to which a bulb is attached and the string is tied to a support. The string swings from one end to the other as shown.
At the both ends, the energy of the pendulum is all potential. When the pendulum is in motion, the energy is all kinetic at the center of motion.
In between both extremes the energy is both kinetic and potential as shown. The total energy is this a summation of the two.
An over-caffeinated student stands on a table which weighs 600 newtons. The student has a mass of 50 kg. What is the weight of the student? What is the weight of the student AND the table combined? Now, what is the TOTAL normal force on the table by the floor?
Answer:50kg
Explanation:
Consider (a) an electron (b) a photon, and (c) a proton, all moving in vacuum. Choose all correct answers for each question. (iii) Which carry energy?
Electron , photon and proton carry energy which is option (a) , (b) ,(c)
An electron is a solid negatively charged factor of an atom. Electrons exist outdoor of and surrounding the atom nucleus. Each electron includes one unit of bad charge (1.602 x 10-19 coulomb)A proton is a subatomic particle discovered withinside the nucleus of each atom. The particle has a advantageous electric charge, identical and contrary to that of the electron Photon is a subatomic particle, having strength and momentum however no mass or electric powered charge, this is the quantum unit of electromagnetic radiation, together with light.Photons are massless, but they have energy [tex]E = hv= \frac{hc}{\lambda}[/tex]
Here 'h' is called Planck's constant .
For electron and proton energy is given by
[tex]E=\frac{1}{2} \times mv^2[/tex]
Where m is the mass of the particle and v is the speed of particle .
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PLEASE HELP ME
What is the net force acting on the car?
Mathew throws a ball straight up in the air. it rises for a period of time and then begins to drop. At which points in the balls journey will be gravity be the greatest force acting on the ball
Answer: The greatest force of gravity on the ball will occur at the point when the ball is near to hit the ground ... hope this helps have a good day :P
write down the kirchhoff's laws in the adjoining circuit , find the current in each resistors
Answer:
You need a motor and a battery
Explanation:
The currents through 4 ohm, 2 ohm and 5 ohm are 0.42 amp, 0.15 amp and 0.26 amp respectively.
What are the Kirchhoff's laws ?
Kirchhoff's Current Law states that no charge is lost and that the total current flowing into a junction or node equals the charge leaving it.
Kirchhoff's Voltage Law states that for any closed network, the voltage around a loop is equal to the total of all voltage drops in that loop and is equal to zero.
Let the current through 4 ohm is I₁.
the current through 2 ohm is I₂.
Applying Kirchhoff's Current Law, current through 5 ohm is I = I₁ + I₂.
Applying Kirchhoff's Voltage Law in two loops we get:
4 I₁ + 5(I₁+I₂) = 3
2I₂ + 5(I₁+I₂) = 1
Hence, I₁ = 0.42 amp
I₂ = - 0.15 amp
I₃ = 0.26 amp
Hence, the currents through 4 ohm, 2 ohm and 5 ohm are 0.42 amp, 0.15 amp and 0.26 amp respectively.
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If two people lift identical stacks of books the same distance and one person does the job twice as fast, which of the following has doubled?
-power
-work output
-work input
-efficiency
Answer:
Power
Explanation:
Power is defined as the rate of doing work with reference to the time spent and the formula is force multiplied by velocity.
In this case, if two people lift identical stacks of books the same distance and one person does the job twice as fast, then it means the velocity in the case is doubled which will also lead to an increase in the Power .
PowerExplanation:
The formula for power is Work divided by time taken, so P=W/T.
That case, involved power, since one of the people did work twice as fast, but, it was the same amount of work each person did, for the same distance (not exact distance, but usually the same)
How can you drop two eggs the fewest amount of times, without them breaking?
Answer:
Both eggs are identical. The aim is to find out the highest floor from which an egg will not break when dropped out of a window from that floor. If an egg is dropped and does not break, it is undamaged and can be dropped again. However, once an egg is broken, that's it for that egg.
In his experiments on "cathode rays" during which he discovered the electron, J. J. Thomson showed that the same beam deflections resulted with tubes having cathodes made of different materials and containing various gases before evacuation.(d) Could Thomson observe any deflection of the beam due to gravitation? Do a calculation to argue for your answer. Note: To obtain a visibly glowing patch on the fluorescent screen, the potential difference between the slits and the cathode must be 100V or more.
Thomson could not observe any deflection of the beam due to gravitation.
What is a cathode ray?Cathode ray refers to the beam of electrons that moves from the negatively charged cathode to the positive anode at the other end of the pipe.
J. J. Thomson demonstrated that the identical beam deflections produced tubes with cathodes composed of varied materials and containing a range of gases prior to evacuation.
The gravitational force is approximately 10⁴⁰.
The movement of the light beam shouldn't be impacted because it is 10²⁸ times weaker than the electric force.
Thomson was unable to detect any gravitational beam deflection.
Thus, Thomson could not observe any deflection of the beam due to gravitation.
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Jennifer wears a black shirt on a sunny summer day. After spending one hour outdoors, Jennifer notices that the shirt is much warmer than it was originally. What role did sunlight play in warming the shirt
Explanation:
Black or Dark color clothes are good absorbers of heat. The heat from the sun is absorbed by the black shirt, thus making the shirt warmer. The sunlight here is source of heat. The amount of heat absorbed can be calculated according to the stephan's law.
According to the scientific method which do you have to do before you can form a hypothesis?
According to the scientific method, you have to make observations and ask questions before you can form a hypothesis.
What is the scientific method?The scientific method is a series of steps or procedures which scientists follow in their process of discovery and explanation of the natural world or natural phenomena.
The scientific method consists of the following steps:
observation/ asking of questionsformulation of hypothesisdesigning of experimentstesting the hypothesisanalyzing the data from the experimentconclusionsfurther experimentstheory/lawIn conclusion, observations and questions are important before formulation of hypothesis.
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