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- Derivation of velocity in nth Bohr orbit • Physics Forums
Homework Statement (a) Derive an expression for the electron's speed in the nth Bohr model (b) Prove that the orbit with highest speed is the n = 1 orbit,with v(1) = ke^2 h compare this with the speed of light , and comment on the validity of ignoring relativity (as we did) in
- How to Determine Velocity from a Force-Time Graph?
Impulse is the area under the graph of Force versus time Generally calculated (using Calculus) as So, what you did for part (A) is absolutely correct For part (B): Use the Impulse - Momentum Theorem, which says that the change in momentum of an object from time t 1 to time t 2 is equal to the Impulse of the net Force on the object from time t 1 to time t 2 For part (C): What you did
- Why pressure decreases with increase in velocity - Physics Forums
Why would velocity perpendicular to flow be unchanged? My simple thought would be that there would be a preference in trajectory for molecules in a flow situation to be aligned more along the direction of flow The only rigid surfaces in flow are perpendicular to the direction of flow Change your reference frame to one in which the flow is at
- Vinyl records, RPMs, and velocity. How does it work?
So, Physics Forum, which is it? Does a record player accommodate for this difference in velocity through design (grooves, stylus arm, etc ) or is the groove cut the same at any point with the radius of stylus location having no effect, and making me a complete fool who doesn't understand how rotation works?
- Is velocity ever a scalar quantity? - Physics Forums
I thought velocity was always a vector quantity, one with both magnitude and direction When it came to the suvat equations, where v = final velocity, and u = initial velocity, I thought both of those were vector quantities, e g; v (final velocity) 112km hr North u (initial velocity) 0km hr
- Calculating Nozzle Flow Rate - Physics Forums
Calculating Nozzle Flow Rate To work out the flow rate of water from a nozzle we need to work out the volume in a given period of time To do this we work out the area of the nozzle and then multiply it by the velocity of the water coming from the nozzle to give us volume per unit of time
- Solving for distance using only initial velocity and coefficient of . . .
Actually, althought relating the Kinetic Energy equation to the equation about friction and distance might be conceptually valid, it isn't the clue this person needed At the early point (probably around chapter 4) of an "elementary physics" textbook, a student encounters problems where, given an initial velocity and coefficient of friction , the student is expected to provide the resulting
- Problem in understanding instantaneous velocity - Physics Forums
The average velocity is the rate of change of position over a time interval, while the instantaneous velocity is the rate of change of position at a point in time As a time interval approaches a point in time, the average velocity approaches the instantaneous velocity
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