What would the person’s mass be on the earth? Part B pls
Answer:
I hopes it helps
thank you
Table is in the picture. and will mark brainstest
Here is the question
Based on the table, which list orders materials from most conductive to least conductive?
A) copper, zinc, plastic glass insulator weak plastic insulator medium B) rubber, copper, glass rubber insulator strong zinc conductor weak
C) aluminum, glass, zinc
D) zinc, copper, aluminum
Answer:
C
Explanation:
Answer: Rubber, copper, aluminum, plastic, zinc, glass
Explanation:Or something along those lines
a big chunk of my exam, anyone know anything :)
Answer:
Explanation:
As one side of the coil moves up through the magnetic field , a current is induced in one direction. As the rotation continues and that side of the coil moves down, the induced current reverses direction. This means that the generator produces a current that is constantly changing. This is alternating current or a.c..
Answer is mainly 2 parts where Part 1 is basic explanation of AC generator and origin of the law of induction in AC generator where Part 2 explains the reason behind Variation of current and EMF according to the rule..:
An AC Generator "Dynamo, Alternator" generates Alternating current according to the laws of Electromagnetic Induction in a straight wire
"Wire + Magnet + Motion= Electron flow" expressed in Faraday's law and Lenz's rule "EMF= -N ΔΦ/t"
In a straight wire moving perpendicular to a magnetic field, induction of Maximum EMF occurs in the wire according to the law of induction in straight wire derived from Faraday's rule and Lenz's law "EMF= -BLV Sinθ" Where "B" is Magnetic Flux density , "L" is length of wire ,"V" is the velocity which the wire moves by and "θ" is the angle between Magnetic Field and Straight wire and as usual the - is to apply to Lenz's rule
Switching back to the Alternator which is in form of a rectangular coil "4 straight wires"
We can conclude that the induced EMF rule must be 4BLV "Ignoring Lenz's rule since it's AC" but due to the presence of 2 sides parallel to Magnetic lines at the points of axle attachment so they do not induce current Sinθ = zero
EMF= 2BLV Sinθ . Since the coil rotates around itself "Rotatory motion" Thus, Velocity must be expressed in terms of Angular velocity where V "Linear Velocity" equals Omega "ω" (which is the angular velocity) multiplied by "r" (Radius of circle of motion)
EMF= 2BL (ωxr) Sinθ . Since the coil rotates around its own axis then diameter circle of motion equals 2r which is basically the width of the coil "W" and radius = 1/2 W
EMF= BL*W ω Sinθ.. 1/2 cancels out the 2 and we have L*W which is Area of coil
EMF= BAωN Sinθ is the final form of the rule where N is added respecting the number of turns of coil where Dynamo produces maximum EMF at angle 90°,270° between magnetic lines and normal to coil
Reason of Alternation of current in the form of a Sinusoidal wave form "where EMF starts from zero rises to maximum emf descends to zero then descends again to -maximum emf then back to zero" is due to the coil's rotatory motion and changing of angle between magnetic field and normal to coil according to the above rule , For example Coil starts motion from zero position where the coil itself is Normal to magnetic field but the normal to coil is Parallel to the field so θ = zero thus no emf induced
After start of motion and rotation of coil using handle the angles start to change from 0° till 90° "1/4 cycle" Induced EMF increases from zero according to rule till reach maximum at 90° where Sin90 equals 1 , When continuing motion and according to sin graph value of EMF decrease as we proceed from angle 90° till 180° "another 1/4 cycle summing up to 1/2 cycle" where EMF reaches zero again at 180° since Sin180 equals 0, As we the rotation proceeds from angle 180° till 270° "another 1/4 cycle summing up to 3/4 cycle" EMF Increases till reaching Maximum BUT in opposite direction of motion since basically the - sign is a symbol of direction in physics but since the Graph is mathematical it is expressed as a decrease in EMF till reach -Max since Sin270 equals -1 which is opposite to max, Finally at the last quarter cycle from angle 270° till 360° EMF starts to decrease back to zero Physically but Mathematically seen as an increase since we were at -Max
So to sum it all up...AC current is due to Variation of Angle between Motion of coil and Magnetic lines causing the Variation of Current in tiny amounts of time with very high frequency
A 7 kg ball is push with a force of 28 What is the acceleration?
Answer:
a = 4 m/s²
Explanation:
Given: 28 N, 7 kg
To find: Acceleration (a)
Solution: To find (a), divide force by weight
A = F ÷ m
= 28 ÷ 7
= 4 m/s²
Newtons are derived units, equal to 1 kg-m/s². In other words, a single Newton is equal to the force needed to accelerate one kilogram one meter per second squared.
Think of an example of a chemical change that some people might think is NOT a chemical change. Explain why it is.
Answer:
:)
Explanation:
i need 5 points i really do :)
Help ASAP!
Shakira of mass 40kg stands in soft mud in her garden. The sole of each of her shoes has an area of 0.0140 cm2. Determine the:
A. pressure created on the ground by each foot
B.total pressure created on the ground by her feet
Answer:
I hope the answer helps you
Calculate the electric current that flows through a electric heater of power 1000watt when collected with 220 volt ac supply
Answer:
4.545 A
Explanation:
From the question,
Using,
P = VI....................... Equation 1
Where P = power of the heater, V = Voltage supply, I = Electric current that flows through the heater
make I the subject of the equation above
I = P/V.................. Equation 2
Given: P = 1000 watt, V = 220 volt.
Substitute these values into equation 2
I = 1000/220
I = 4.545 A
Which is an example of a polyatomic ion?
Answer:
Well-known examples of such polyatomic ions are the sulfate ion (SO42–), the hydroxide ion (OH–), the hydronium ion (H3O+), and the ammonium ion (NH4+).
Explanation:
Answer:
is there more context to go with this question? Like a photo?
I will give it my best shot anyhoo
Explanation:
Polyatomic ions: they are covalently bonded groups of atoms and having a positive or negative charge caused by the formation of an ionic bond with another ion.
And if your question is anything like the one I had a few days ago on a test, your answer would be something like "Both hydroxide cation (OH -) and phostphate cation (PO 4 3 -) are polyatomic ions)
Some of our appliances have a magnet in it.
yes or no
Answer:
yes !!
Explanation:
Magnets can be found in the simplest or most complex devices you use every day. From home appliances such as the refrigerator, microwave oven and electric fan, to your company's office equipment such as computers and printers. All these devices use magnets.
Which pair of sentences best describes a scientific discovery in A Black Hole Is NOT a Hole by Carolyn Cinami DeCristofano?
The answer is C.
Answer:
A question with an Answer? Wowza!
Explanation:
Answer:
First, scientists studied radio waves coming from space. Next, other scientists used their discoveries to identify black holes.
Explanation:
hope this helped
Suppose, the same angular momentum is transferred to two rotating bodies of different moment of inertia , how will you compare the angular velocities of the two bodies as a result of angular momentum transfer.
Answer:
As per the law of conservation of angular momentum, the angular velocity will be higher for the body with a lower moment of inertia and vice versa.
Explanation:
Angular momentum L of a body is given by:
[tex]L=I\times \omega[/tex]
Now when the same angular momentum is transferred to two different bodies with different moment of inertia, the body with a higher moment of inertia will have lower angular velocity and vice versa.
You are running late for class and are still in the hallway when the bell rings. The tardy bell is right outside your classroom door, and your teacher is standing directly beneath it. If you are running towards the bell when it rings, which of the following best describes what you hear? (DOK 1)
Question 8 options:
A. You hear a higher pitch than your teacher
B. You hear a lower pitch than your teacher
C. You hear a louder pitch than your teacher
D. You hear the same pitch as your teacher
Answer:
C
Explanation:
You will hear a lower pitch of sound than your teacher who is directly below the bell.
The pitch of a sound refers to how high or low the sound is. If a sound is high we say that it has a high pitch and vice versa.
We must note that the closer you are the bell the higher the pitch of the bell sound you hear. Hence, you will hear a lower pitch of sound than your teacher who is directly below the bell.
Learn more about pitch of sound: https://brainly.com/question/4206267
How can a conductor be made superconductor?
Answer:
a superconductor in a magnetic field and you'll make electric currents flow through its surface. These currents create a magnetic field that exactly cancels the original field trying to get inside the superconductor and repelling the magnetic field outside.
Explanation:
Which explanation best compares the movement of particles in the three states of matter?
A.
Particles in a gas can only vibrate. In a solid, they slide against each other. In a liquid, they move freely, bouncing and bumping into each other.
B.
Particles in a solid can only vibrate. In a liquid, they slide against each other. In a gas, they move freely, bouncing and bumping into each other.
C.
Particles in a liquid can only vibrate. In a gas, they slide against each other. In a solid, they move freely, bouncing and bumping into each other.
D.
Particles in a solid can only vibrate. In a gas, they slide against each other. In a liquid, they move freely, bouncing and bumping into each other.
E.
Particles in a liquid can only vibrate. In a solid, they slide against each other. In a gas they move freely, bouncing and bumping into each other.
Answer: B
Explanation:Solids are packed thus molecules are restricted and can only vibrate. Liquids, on the other hand, molecules can move and slide against each other since they are loosely packed. Lastly, gas particles is very loosely packed so they can move freely.
A 1.2 m long wave travels 11.2 m to a wall and back again in 4.0 s. What is
the FREQUENCY of the wave*
Answer:
f = 4.67 Hz
Explanation:
We can approximate the wave as a traveling wave, therefore the speed of the wave is constant
v = d / t
the total distance remember, in going to the wall and back is
d = 2 11.2 = 22.4 me
we substitute
v = 22.4 / 4.0
v = 5.6 m / s
now we can use the relationship between the speed of the wave, its wavelength and u frequency
v =λ f
f = v /λ
f = 5.6 / 1.2
f = 4.67 Hz
A baseball sits motionless near first base on a baseball diamond. What statement best explains why the baseball remains motionless?
Answer:
Because no one is using that ball, so it is motionless
Answer:
No one is using the ball (dead ball) and therefore it is motionless and out of play
Explanation:
An ideal pendulum is often discussed when studying simple harmonic motion. What are the conditions needed for an ideal pendulum? Check all that apply.
Complete question is;
An ideal pendulum is often discussed when studying simple harmonic motion.
What are the conditions needed for an ideal pendulum? Check all that apply.
1) Gravitational force acts to pull the pendulum’s mass down.
2) The mass of the rod of the pendulum is evenly distributed along the rod.
3) The pivot on which the pendulum swings is frictionless.
4) The pendulum swings through its equilibrium position as a result of inertia.
5) Tension acts downward on the pendulum’s mass
Answer:
Conditions 2,3 & 4 are the ones that apply
Explanation:
The conditions required for an ideal pendulum are;
- The mass of the rod of the pendulum has to be evenly distributed along the rod.
- Ensure that the pivot on which the pendulum is swinging is frictionless
-The pendulum has to swing through it's equilibrium position as a result of inertia.
Thus,the correct options are 2, 3, 4.
Answer:
Gravitational force acts to pull the pendulum’s mass down.
The pivot on which the pendulum swings is frictionless.
The pendulum swings through its equilibrium position as a result of inertia.
Explanation:
Just took the test
anyone know the answer ?
Answer:
d
Explanation:
the answer of the above mentioned question is 2N to the left.
hope this helps!
A major disturbance that caused the ecosystem to stabilize at a new equilibrium?
Answer: If you remove all of the hawks, it stabilizes an a new equilibrium.
Explanation: For the ecosystem to stabilize at a new equilibrium, the tertiary consumer (hawks) need to be totally removed from the ecosystem. Since there's no tertiary consumer to checkmate the density of other components of the food chain, it will make form a balanced ecosystem.
There is a 1 in roughly 5.2 to the 61st power chance that if you were to slap a table, all of the molecules in your hand and the table would miss each other and your hand would go through it.
Answer:
True
Explanation:
A 2,000 kg freight train is traveling on the railroad tracks from Birmingham to Mobile. It traveling at a speed of 25 m/sec. What is the kinetic energy of this train?
Answer:
The correct answer is "625,000 J".
Explanation:
The given values are:
Mass,
m = 2,000 kg
Speed,
v = 25 m/sec
As we know,
⇒ [tex]Kinetic \ energy=\frac{1}{2} (mass \times speed^2)[/tex]
Or,
⇒ [tex]K.E=\frac{1}{2}(mv^2)[/tex]
On substituting the values, we get
⇒ [tex]=\frac{1}{2}(2,000\times 25^2)[/tex]
⇒ [tex]=1000\times 625[/tex]
⇒ [tex]=625,000 \ J[/tex]
A cat runs up a 45 m tall tree in 1.4 s. What is the average velocity of the cat?
0.031 m/s, up
44 m/s, up
63 m/s, up
32 m/s, up
Answer:
Explanation:
d = 45
t = 1.4 seconds
v = delta d / t
v = 45 / 1.4
v = 32 m/s
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A light source has a frequency of 7.56 x 1014 Hz. What is the wavelength, in nanometers (nm), of this light when it passes through a prism of refractive index of 1.53?
Answer:
2nm
Explanation:
A car Starts from rest and moves with constant acceleration.During the 5th second of its motion, it covers a distance of 36 meters. What is the acceleration of the car? A) 12 meter per second B) 8 meter per second C) 15 meter per second D) 16 meter per second E) 14 meter per second
Answer:
Acceleration of the car = 2.88 meter/second²
Explanation:
Given:
Car starts from rest
So,
Initial velocity = 0 m/s
Time taken = 5 second
Distance cover in 5 seconds = 36 meter
Find;
Acceleration of the car
Computation:
Using second equation of motion
S = ut + (1/2)(a)(t²)
Where;
S = Distance cover
u = Initial velocity
a = Acceleration
t = time taken
So,
S = ut + (1/2)(a)(t²)
36 = (0)(5) + (1/2)(a)(5²)
36 = (1/2)(a)(25)
36 x 2 = (a)(25)
72 = (a)(25)
Acceleration of the car = 2.88 meter/second²
what is newton's second law of motion?
Answer:
Newton's second law of motion can be formally stated as follows: The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
how do protons indentify hydrogen?
•will mark brainest
Answer: Hydrogen is a chemical element with atomic number 1 which means there are 1 protons in its nucleus. Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z.
Explanation: hope this helps
if jake paul and logan paul fought to the death who do you think would win?
Answer:
Hehe :) Fun question, Ig Logan Paul?? XD
Some individuals have developed to use echolocation and thus able to see even if they are blind, True or False
Answer:
please give me brainlist and follow
Explanation:
The good news is that anyone can learn this ability, blind or sighted. Lore says that echolocation requires probably as much commitment as developing expert long cane skills. Lore acknowledges that, while there are many people who have some basic echolocating skills, there are only a few who really master this ability.
It is a good idea to read or exchange text messages during all of the following times EXCEPT:
A.
while driving a car
B.
while eating lunch
C.
while waiting at the doctor's office
D.
while riding a bus
Please select the best answer from the choices provided.
A
B
C
D
Answer: A while driving a car. It is unsafe
Answer:
It is a good idea to read or exchange text messages during all of the following times except while driving a car.
Explanation:
Eating lunch and using your phone is very safe. The only way I can see it being bad is if you handed your phone to some toddlers and took it back without wiping it off!
If you're waiting for your appointment or waiting to reach your destination, then there is also no harm. As long as you are not driving the bus or you're not the doctor working on patients while texting, then this should be alright.
This leaves us with driving. The commercials tell us. Common knowledge tells us. Hopefully, parents or colleagues or even your own kids (I've had to do this to my dad countless times before) have told you this...
DO NOT TEXT WHILE DRIVING.
So many accidents happen solely for this reason. People, just put down the phone and wait 'til you're at a red light or, even better, when you reach your destination.
So no, it is not a good idea to read OR exchange text messages while driving. Any other time? Well, go ahead! But if you're in that driver seat and your currently in the road with other cars, take into consideration the fact you are not the only person there. Keep everyone safe and drop that phone!
....
My bad, I got long winded. Hope this helped!
Source(s): TV Commercials, myself.