Answer:[tex]1.95\times 10^5\ N/C[/tex]
Explanation:
Given
The charge per unit area on the plate is [tex]\sigma =3.47\times 10^{-6}\ C/m^2[/tex]
Electric for a infinitely large plane is given by
[tex]E=\dfrac{\sigma }{2\epsilon_o}[/tex]
Therefore, electric field at a point 2.4 m from the plane is
[tex]\Rightarrow E=\dfrac{3.47\times 10^{-6}}{2\times 8.854\times 10^{-12}}\\\\\Rightarrow E=0.195\times 10^6\ N/C[/tex]
You drop a 10 kg bowling ball off a 2 story building, what is the force generated by
the bowling ball when it hits the ground
Answer:i
Explanation:
a 4 kg block is moving at 12 m/s on a horizontal frictionless surface. a constant force is applied such that the block slows with an acceleration of 3 m/s^2. how much work must this force do to stop the block?
a. -576 J
b. -360 J
c. -288 J
d. 360 J
e. 576 J
Answer:
c. -288 J
Explanation:
Given;
mass of the block, m = 4 kg
velocity of the block, v = 12 m/s
deceleration of the block, a = 3 m/s²
Apply work-energy theorem;
work done in stopping the block = kinetic energy of the block
W = ¹/₂mv²
where;
W is the magnitude of the work done by the force
W = ¹/₂ x 4 x 12²
W = 288 J
Since the work done by the force is in opposite direction, then the value of the work done by the force is -288 J
which choice displays the effects of quantum mechanics? check all that apply
atoms
subatomic particles
particles that are 10^-9m
microtechnology systems
protons
neutrons
particles that are 10^-3m
Answer:
A,B,C,D,F,G
Explanation:
Edge 2021
The atoms, subatomic particles, particles that are 10^-9m, microtechnology systems, neutrons and particles that are 10^-3m will displays the effects of quantum mechanics.
What is Quantum Mechanics?Quantum Mechanics is the branch of mechanics deals with the mathematical description of the motion and interaction of subatomic particles, incorporating the concepts of quantization of energy, wave–particle duality, the uncertainty principle, and the correspondence principle is Quantum Mechanics.
It is theory says at subatomic level, energy exists in discrete levels as "quanta" and particles behave as waves.
A Subatomic particles are the particle that are present inside an atom. These particles are electrons, protons, and neutrons.
Thus, atoms, subatomic particles, particles that are 10^-9m, microtechnology systems, neutrons and particles that are 10^-3m will displays the effects of quantum mechanics.
Learn more about Quantum Mechanics;
brainly.com/question/7221719
#SPJ2
Describe the environment of Antarctica.
Answer:
Antarctica is a desert. It does not rain or snow a lot there. When it snows, the snow does not melt and builds up over many years to make large, thick sheets of ice, called ice sheets. Antarctica is made up of lots of ice in the form of glaciers, ice shelves and icebergs.
A wave traveling in water has a frequency of 500Hz and a wavelength of 3.00 meters. What is the speed of the wave?
Answer:
1500 m/s
Explanation:
How are radar and an approaching siren alike? How are they different?
A. Both use sound waves, but the Doppler effect can be observed
only with radar.
B. Both use sound waves, but the Doppler effect can be observed
only in the approaching siren.
C. Both exhibit the Doppler effect, but radar uses radio, and the siren
'uses sound waves.
D. Both exhibit the Doppler effect, but radar uses sound waves, and
the siren uses radio.
Answer: D
Explanation: I just took the test
Answer: Both exhibit the Doppler effect, but radar uses radio, and the siren' uses sound waves.
Explanation: I took the test
A silver medallion is sealed within a transparent block of plastic. An observer in air, viewing the medallion from directly above, sees the medallion at an apparent depth of 2.0 cm beneath the top surface of the block. How far below the top surface would the medallion appear if the observer (not wearing goggles) and the block were under water (n
Answer:
2.66 cm
Explanation:
Apparent depth ( d1 ) = 2.0 cm
d2 = ?
Determine how far below top surface the medallion would appear
lets express The two scenarios
Case 1 : apparent depth as d1 = dactual (Nair/ nplastic) . ( eyes in the air )
Case 2 : Apparent depth as d2 = dactual (Nwater / nplastic) ( eyes in water )
Final How far below top surface will the medallion appear
d2 = d1 * Nwater / Nair
= ( 2 * 1.33) / 1 = 2.66 cm
note : Nwater = 1.33, , Nair = 1 ( missing values in your question )
Sunlight is composed of wavelengths of light that make up part of the electromagnetic spectrum. Towson University Exam Question. The frequency of a wave is directly proportional to the speed at which the wave is traveling. Do NOT Copy! Calculate the frequency (in Hz) of light at the following wavelength:
Answer:
[tex]f= 5.11 * 10^{10}Hz[/tex]
Explanation:
Given
[tex]\lambda = 0.587cm[/tex]
See comment for complete question
Required
Calculate the frequency
Frequency is calculated using:
[tex]f = \frac{c}{\lambda}[/tex]
Where
[tex]c \to[/tex] speed of light
[tex]c =299792458 ms^{-1}[/tex]
[tex]\lambda = 0.587cm[/tex]
Convert wave length to meters
[tex]\lambda = 0.587 * 0.01m[/tex]
[tex]\lambda = 0.00587m[/tex]
So, we have:
[tex]f = \frac{c}{\lambda}[/tex]
[tex]f=\frac{299792458 ms^{-1}}{0.00587m}[/tex]
[tex]f=\frac{299792458}{0.00587}Hz[/tex]
[tex]f= 5.11 * 10^{10}Hz[/tex]
1. Where are stars formed?
A. A planetary nebula
B. Near the center of the universe
C. A nebula
D. A dying planet
[tex]\huge{\textbf{\textsf{{\color{navy}{An}}{\purple{sw}}{\pink{er}} {\color{pink}{:}}}}}[/tex]
C. A nebula.
thanks hope it helpsAnswer:
a nebular
hope it up
Explanation:
wirks
An 80 kg astronaut has gone outside his space capsule to do some repair work. Unfortunately, he forgot to lock his safety tether in place, and he has drifted 5.0 m away from the capsule. Fortunately, he has a 1000 W portable laser with fresh batteries that will operate it for 1.0 h. His only chance is to accelerate himself toward the space capsule by firing the laser in the opposite direction. He has a 10-h supply of oxygen. His only chance is to accelerate himself toward the space capsule by firing the laser in the opposite direction. He has a 10-h supply of oxygen.
Required:
How long will it take him to reach safety?
Answer:
t = 3.924 s
Explanation:
First, we will calculate the amount of work required to get the astronaut back to the capsule:
[tex]W = Fd\\[/tex]
where,
W = work required = ?
F = Force = Weight = mg = (80 kg)(9.81\ m/s²) = 784.8 N
d = distance = 5 m
Therefore,
[tex]W = (784.8\ N)(5\ m)\\W = 3924 J[/tex]
Now the time can be calculated as:
[tex]Power = \frac{W}{t}\\t = \frac{W}{Power}\\\\t = \frac{3924\ J}{1000\ W}\\\\[/tex]
t = 3.924 s
Two blocks travel along a level frictionless surface. Block A is initially moving to the right, while block B is initially at rest. The mass of block A is greater than the mass of block B. The positive x-direction is to the right. The magnitude of the change in momentum of block A is ______ the magnitude of the change in momentum of block B.
Answer:
Explanation:
The magnitude of the change in momentum of block A is equal and opposite the magnitude of the change in momentum of block B.
According to law of conservation of momentum , there should not be any change in the momentum in the system .The system consists of A and B . So if some change in momentum has occurred in A , the other must have equal and opposite change in momentum so that they get cancel out and net change in momentum of system is zero.
Question 3 of 5 What happens to the particles in a substance as it melts? O A. The particles slow down and become fixed in place. B. The particles move more quickly but stay fixed in place. O C. The particles slow down and move closer together, but they can still move around. O D. The particles move more quickly and begin to move from place to place. SUBMIT
Answer:
D. The particles move more quickly and begin to move from place to place.
Explanation:
In the chapter on psychoactive drugs within this week's module, a table shows various
psychoactive drugs and the neurotransmitters that those drugs effect. Which of the following
neurotransmitters is effected by marijuana?
Serotonin
Blood
Acetylcholine
GABA
Answer:
marijuana effects on Serotonin and GABA
Explanation:
A psychoactive drug is a chemical that changes our states of consciousness, and particularly our perceptions and moods. These drugs are commonly found in everyday foods and beverages, including chocolate, coffee, and soft drinks, as well as in alcohol and in over-the-counter drugs, such as aspirin, Tylenol, and cold and cough medication. Psychoactive drugs are also frequently prescribed as sleeping pills, tranquilizers, and antianxiety medications
These drugs are thought to raise serotonin levels by inhibiting the reuptake process that brain cells use to remove excess serotonin. But several lines of evidence suggest that marijuana has negative effects on serotonin levels and may block the action of serotonin-boosting
The drug activates CB1 receptors on GABAergic and glutamatergic neurons in the ventral tegmental area (VTA), inhibiting the activity of both. CB1 inhibition of GABA neurons promotes, and inhibition of glutamate dampens, VTA dopaminergic neurons' activity and dopamine release in the NAC.
Learn more about Marijuana
https://brainly.com/question/23322909
#SPJ2
Phase portraits (or phase diagrams) provide a powerful tool to visualize the dynamics of ODE systems.
a. True
b. False
The frequency and wavelength of EM waves can vary over a wide range of values. Scientists refer to the full range of frequencies that EM radiation can have as the electromagnetic spectrum.
Electromagnetic waves are used extensively in modern technology. Many devices are built to emit and/or receive EM waves at a very specific frequency, or within a narrow band of frequencies. Here are some examples followed by their frequencies of operation:
garage door openers: 40.0 MHz,
standard cordless phones: 40.0 to 50.0 MHz,
baby monitors: 49.0 MHz,
FM radio stations: 88.0 to 108 MHz,
cell phones: 800 to 900 MHz,
Global Positioning System: 1227 to 1575 MHz,
microwave ovens: 2450 MHz,
wireless Internet technology: 2.4 to 2.6 GHz.
Solution :
All of these technologies uses the technologies of radio waves, including the low [tex]$\text{frequency}$[/tex] microwaves.
The microwave ovens emits in the same frequency band as that some [tex]$\text{wireless}$[/tex] Internet devices.
[tex]$\text{The radiation}$[/tex] that is emitted by the wireless Internet devices having the [tex]$\text{shortest wavelength}$[/tex] of all the technologies are listed.
All these technologies emits waves with a wavelength in the range [tex]$0.10 \ m$[/tex] to [tex]$10 \ m$[/tex].
The [tex]$\text{earth absorbs}$[/tex] the visible light and also [tex]$\text{emits radiation }$[/tex] with a longer [tex]$\text{wavelength}$[/tex]. The earth then absorbs [tex]$\text{visible light}$[/tex] as well as emits the [tex]$\text{radiation}$[/tex] with a [tex]$\text{lower frequency}$[/tex].
Compare the relative strengths of the nuclear force and the electric force
Answer:
To establish this relationship we must examine the potentials that these forces create. The electrical potential is described by
Ve = k q / r
The potential for strong nuclear force is
Vn (r) = - gs / 4pir exp (-mrc / h)
Where gs is the stacking constant and r the distance between the nucleons,
We can compare these potentials where the force is derived from the relationship
E = -dU / dr
F = q E
Explanation:
Jupiter's acceleration due to gravity is 26.2 m/s2. The amount of potential energy stored in a 300 g
object 1.75 m above Jupiter's surface would be
Answer: The amount of potential energy stored in 300g object is 1,75m.
The amount of potential energy stored in the object is 13.755 J.
To determine the potential energy stored in the object, we need to know about the gravitational potential energy and how is it calculated.
What is gravitational potential energy?The potential energy of a massive object has in relation to another massive object due to gravity is known as gravitational potential energy.What is the mathematical expression of gravitational potential energy?Mathematically, the gravitational potential energy is m×g×h.where, m=mass
g= gravitational field or acceleration due to gravity
h= height
Here, m= 300gm=0.3Kg , g=26.2 m/s², h=1.75mPotential energy = 0.3×26.2×1.75=13.755J.
Thus, we can conclude that the amount of potential energy stored in a 300g object 1.75 m above Jupiter's surface would be 13.755J.
Learn more about the potential energy here:
https://brainly.com/question/3120930
#SPJ2
Which of these devices is a type of aerobic exercise machine?
Answer:
Aerobic exercise is an important component of a healthy lifestyle. Find out more about aerobic equipment that can help keep you fit.
Aerobic equipment simulates the movements of aerobic exercises such as walking, jogging, rowing, skiing, hiking, biking, and climbing. These activities rhythmically and continuously move your large muscles — the key to getting your heart beating fast enough and long enough for aerobic conditioning.
What’s the net force of a box with 60n left and 20n right
Answer and Explanation:
There would be a net force of 40n going left, because 20n going right would cancel out the 20n in the 60n going left, making 40n go left.
#teamtrees #PAW (Plant And Water)
what is made by placing a piece of iron inside a coil of wire carrying a current
Answer:
electromagnet
Explanation:
Magnet
.....
Aluminum has an alpha value of 25 x 10^-6 1/degrees C. What is the change in
length of a 4850 cm wire at 2 degrees C when the temp increase to 55 degrees
C?
Answer:
6.4 cm.
Explanation:
From the question given above, the following data were obtained:
Coefficient of linear expansion (α) = 25×10¯⁶ / °C
Original length (L) = 4850 cm
Initial temperature (T₁) = 2 °C
Final temperature (T₂) = 55 °C
Change in length (ΔL) =?
The change in the length of the wire can be obtained as follow:
α = ΔL / L(T₂ – T₁)
25×10¯⁶ = ΔL / 4850(55 – 2)
25×10¯⁶ = ΔL / 4850 × 53
25×10¯⁶ = ΔL / 257050
Cross multiply
ΔL = 25×10¯⁶ × 257050
ΔL = 6.4 cm
Therefore, the change in the length of the wire is 6.4 cm
How many ohms of resistance must be present in a circuit that has 50 volts and a current of 2 amps.
Answer:
25 ohms
Explanation:
Hi there!
Ohm's law states that [tex]V=IR[/tex] where V is voltage, I is current and R is resistance.
Plug the given information into Ohm's law (V=50, I=2) and solve for R
[tex]V=IR\\50=2R[/tex]
Divide both sides by 2 to isolate R
[tex]\frac{50}{2}= \frac{2R}{2} \\25=R[/tex]
Therefore, there are 25 ohms of resistance present in this circuit.
I hope this helps!
You have two electrical devices plugged into the same socket in parallel and draws 120 V. The first device has a resistance of 20 Ω the other device has a resistance of 10 Ω.
What is the total resistance?
The devices don't "draw" 120v. The 120v comes to your house from the power company. They decide it should be 120v and that's what they send you. It's hypothetically technically possible for you to change that, but if you try it, you'll definitely burn the house down.
The total resistance of those two devices in parallel is 6 and 2/3 ohms. That doesn't depend on what they're plugged into. It would still be 6 and 2/3 ohms if they were connected in parallel, wrapped in tissue, sealed in a jar of chicken soup and stored in a box on a high shelf.
But since they ARE plugged into 120v, they draw 18 Amperes from the socket, and they turn all of that electrical energy into 2160 watts of heat. That's about the same as a good size toaster oven, and you have to figure out a way to get rid of all that heat before you burn the house down.
Select the correct answer from each drop-down menu.
After World War II, political leaders from various countries discussed ways to strengthen individual-as well as
economies. They began promoting
to boost production and exports,
Answer: I think it’s Global for the 1st one
And free trade for the 2nd one
Explanation:
The correct answer is: "After World War II, political leaders from various countries discussed ways to strengthen individual economies." They began promoting economic policies to boost production and exports.
What happened after World War II?After World War II, many countries were left with weakened economies and infrastructure, and there was a need for economic recovery and growth. To achieve this, political leaders from different countries came together to discuss ways to strengthen their individual economies and also promote international economic cooperation. One of the ways they did this was by promoting economic policies that aimed to boost production and exports. This involved policies that encouraged businesses to increase their output and create more jobs, as well as policies that made it easier for countries to trade with each other.
Hence, after World War II, political leaders from various countries discussed ways to strengthen their individual economies. They began promoting economic policies to boost production and exports.
Learn more about World War II's aftermath here.
https://brainly.com/question/27327667
#SPJ5
how much thermal energy is created when a 3000 kg suv brakes to a stop from 20 m/s on a level road?
a. 1,200,000 J
b. 600,000 J
c. 60,000 J
d. 30,000 J
e. 90,000,000 J
Answer:
b. 600,000 J
Explanation:
Applying the law of conservation of energy,
The thermal energy created = Kinetic energy of the suv.
Q' = 1/2(mv²)............... Equation 1
Where Q' = Thermal energy, m = mass of the suv, v = velocity of the suv.
From the question,
Given: m = 3000 kg, v = 20 m/s
Substitute these values into equation 1
Q' = 1/2(3000×20²)
Q' = 600000 J
Hence the right option is b. 600,000 J
If 03.4 kg of water at 69°C is changed into steam at 100°C, how will the energy be used? specific heat capacity of water is 4200J/kg C and latent heat is 2,260 000J/Kg.
A. 7864513 J
B. 8126680 J
C. 329758 J
D. 742976 J
With explanation please
Answer:
The answer is B.
Explanation:
مافيني اشرح
Explain what you understand by Millennial Generation
Answer:
refers to the generation of people born between the early 1980s and 1990s
An open cart is rolling to the left on a horizontal surface. A package slides down a chute and lands in the cart. Which quantity or quantities have the same value just before and just after the package lands in the cart
Answer: the horizontal component of total momentum
Explanation:
Since the open cart is rolling to the left on the horizontal surface, the quantity that has the same value just before and just after the package lands in the cart is the horizontal component of total momentum.
Momentum, is the product of the mass of a particle and the velocity of the particle. The change of momentum depends on the force which acts on it. The addition of the the individual momenta is the total momentum.
26. Acceleration Tecle, with a mass of 65.0 kg, is
standing on an ice-skating rink. His friend
applies a force of 9.0 N to him. What is Tecle's
resulting acceleration?
Force = mass × acceleration
9 = 65 x acceleration
acceleration= 9/65 = 0.318 m/s2
Acceleration Tecle, with a mass of 65.0 kg, is standing on an ice-skating rink. His friend applies a force of 9.0 N to him. Tecle's resulting acceleration is 0.318 m/s²
What is acceleration?The rate at which an item changes its velocity is known as acceleration, a vector quantity. If an object's velocity is changing, it is acceleration.
The net acceleration that objects get as a result of the combined action of gravity and centrifugal force is known as the Earth's gravity, or g. It is a vector quantity whose strength or magnitude is determined by the norm and whose direction correlates with a plumb bob.
Force = mass × acceleration
9 = 65 x acceleration
acceleration= 9/65 = 0.318 m/s²
Acceleration Tecle, with a mass of 65.0 kg, is standing on an ice-skating rink. His friend applies a force of 9.0 N to him. Tecle's resulting acceleration is 0.318 m/s²
To learn more about acceleration refer to the link:
brainly.com/question/12550364
#SPJ2
Plz help The momentum of a baseball changes dramatically when struck by a bat.Momentum of the ball is not conserved. The best explanation for this is that
Answer:
The answer is C the ball is not in a closed system and experience an impulse.
Explanation: