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    thermal energy

    KE ¯ , the average translational kinetic energy of a molecule

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Questions & Answers

what is power
Emmanuel Reply
Power is the rate at which work is done with respect to time.
Prinze
power is ratio work to time
babar
power of a body is its energy possessed in unit time
babar
how much work can be done is within smallest time frame is the power p=w and p=1/T !
Mudang
Work done by a body in per unit time is Power... Simple
Aayush
work done per unit time is power which can be expressed in wattt or horsepower unit simply
Saeed
Yes ✔️ Power (P) = work done by time taken... ie. P= W/T
Aayush
Power can be explained physically as speed of energy change
Dadan
power is the dot product of force and velocity
sana
What is tornado
Smile's Reply
A bicycle has a diameter of 63cm.calculate how many times the wheel turns round intravelling 19.8km.use the value 31/7 for tether
Jubril Reply
What is torque?
Shngainlang Reply
the cross product of force and position vector
Fawad
the angular analouge of force
Fawad
the product of one force and the perpendicular distance between forces
Lekunga
t=bil
Lekunga
where b=flux density
Lekunga
hey guys I'm new here
Djhope
rotational effect of force
babar
the angular analogue of F=ma would be Tao=I•alpha where I is the moment of inertia and alpha is angular acceleration
Julia
what is physical quality?
Ch Reply
it can be measure directly or indirectly.
NARENDRA
a quantity, by definition has a number associated with it, and can be measured as you say. a quality isn't necessarily a number representing something. qualities do not need to be quantitative.
Julia
physical qualities are characteristic of specifics of a particular object, for examples a 500ml 1st container contains 500ml of water and 10.5ml of NACL and 2nd container contain 500ml of water and 0.5ml NACL the Difference between Two of them is the Quality of 2
Mudang
if we buy some thing (cloth) we always not satisfied..... unless some one compare with other things that is quality,we buy that thing
babar
we buy that thing after our satisfaction.
babar
what is a wave
Ologunloluwa Reply
A wave is a disturbance that carry energy from one place to another.
adebayo
what is the importance of electric and magnetic field in mass spectrograph ?
Azeem Reply
you can determine the specific charge of a particle from the radius of gyration (Lamar radius) in the magnetic field.
Sean
furthermore the electric field accelerates the charges, so you can determine the kinetic energy etc
Sean
what is motion
Juliet Reply
a motion is the change in position of an object copmaring to a fixed point
ahmed
comparing*
ahmed
moving or move from one place to another place
Boomi
motion is the movement of an object from one place to another
David
Motion is the continues movement of an object from one fixed point to another with respect to time.
LAHBAN
what is acceleration: this is when the rate of an object changes in respect to it surrounding with time.
Turay
acceleration is change in velocity over time
mohammed
motion doesn't necessarily need to include a change in acceleration: motion is a change in position.
Julia
change in position
Azeem
Motion is the change of position from one point in a space to other point in the same space.. sorry for my english I'm francophone...
André-Franck
motion isn't really a scientific word so much. it just means literally how an object moves. İf you want to describe the motion of an object, to give a full picture you need to tell me what an object is at any moment of time I ask. From there, I can deduce anything I want: velocity, acceleration
Sean
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QuizOver Reply
ok
Chelsea
ok
babar
can u explain the term displacement in another form
Chukwudebelu Reply
displacement is the change in position of an object
Owusu
this is the a average distance covered
Lekunga
change in position with respect to reference point
babar
resultant of position vectors or difference of position vectors of a moving object
babar
Distance with a directional component.
Emmanuel
displacement is the difference between your final and initial positions independent of the path taken. distance is how far you actually moved.
Julia
it is an arrow on a map that can't be rotated or stretched, but it can be moved around. İf I place the tail of it on where you started a journey, the pointy end must lie EXACTLY on where you finished your journey.
Sean
what is gravity
Singut Reply
no one really knows
Sean
how much do you need to know? what are you studying about it?
Sean
humans like to always point to a cause of something. İn fact, we have a phrase in English: "Everything happens for a reason". So, we have noticed ever since we have been alive that any object that had ever existed seems to be pulled by some "invisible hand" towards the earth.
Sean
And also the moon and earth "pull on eachother"...
Sean
Newton came up with this breakthrough that the type of pull between the moon and the earth is the same type of pull between the famous apple and the earth, and that this phenomenon is EVERYWHERE- universal!
Sean
and amazingly, we can actually predict exactly how this "hand" will pull on things.
Sean
Many many years later, Einstein came along and thought of gravity not like some invisible hand but more like something that is part of space and time itself... General relativity!
Sean
is the acceleration ever in the same direction as a component of velocity
Singut Reply
what do you mean?
Sean
explain what "component" means to me
Sean
A 12V battery has a 1ohm resistor in series with a parallel system of 3ohms and 6ohms. How much current is going through the 3ohm resistor?
Ingrid Reply
Total circuit current, I=12/3=4 amperes this means that 8v will be across the parallel resistors. Current through the 3 ohms is 8/3 amperes
Barnabas
How do you know there is 8v across the parallel resistors?
Ingrid
good question
Lekunga
Answer na
Lekunga
3//6 combined is 2 ohms. Total cct R is 3 ohms, I=V/R=4amps. V across 3//6 is therefore = I x R = 8 volts.
Peter
thanks
Lekunga
a particle f suspended by two strings passing over smooth pulley isattached to two other particles q and r .. calculate the masses of p and q if mass of r is 2 kg
Lekunga Reply
there isn't enough information to get a single number for p and q. also, you didn't give information about what p was doing. did you mean particle p instead of f?
Sean
this is like saying two people sit on a seesaw and the seesaw remains horizontal, what are their masses?
Sean
the idea is that assuming when you leave the system alone nothing falls, the weight of q plus weight of r must equal weight of p
Sean
what is hall effect and what are its applications?
Saif-ur-Rehman Reply
It's under sound wave
Adebola
for speed detection.i.e speed of current
Ben
speed of the current is nothing but voltage
sharan
the hall effect is used to measure a magnetic field strength
Sean
This is to do with the fact that current responds to a magnetic field. the charges start turning and end up on one side of the wire. this seperation of charge then ends up causing something you can actually measure, called a potential difference, (or equivalently) a voltage.
Sean
@sharan that is not correct. speed of charges is current. speed of current is... current, as when you say speed of current you are saying "speed of speed of charges". Voltage is how much energy is transferred to one unit of charge (the unit being Coloumb in Sİ units)
Sean
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Source:  OpenStax, College physics. OpenStax CNX. Jul 27, 2015 Download for free at http://legacy.cnx.org/content/col11406/1.9
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