The physics lessons are appropriate for undergraduates, or students of AP Physics C, AP Physics 2, AP Physics 1, or IB Programs. The math lessons range from Algebra 2 and precalculus through calculus and basic differential equations.
The council housing have just put new smoke alarms onto my place in uk today but I felt suspicious a bit uneasy. So should they be ripped out as dangerous or covered in some way ? Great video but I was left wondering what to do a little bit . Thanks
Id be careful mixing angular moment with the systems angular momentum vector... i wasted countless hours deciphering this, afterwards I was met with another question as to how the system maintained rotational and axle equilibrium if the torque of mg • displacement is adding force downward on the system? Rotational relativity has been explained regarding two angular momentum vectors, but nothing on what counter weights the gravitational force? Perhaps i could be intuitive... but i could also use the help! Kindest regards.
Quick question can we use the first method of finding possible roots and plug each one into the equation to find all the roots or does it only work once?
It can find more than one rational root if the polynomial has more than one rational root. It will not find irrational or complex roots. Another strategy: if you find a rational root r, then (x-r) is a factor. You can divide the original polynomial by (x-r) and then work on finding the roots of the quotient, which will be one degree smaller (easier to solve!) than the original polynomial.
Thank you so much for this. We payed my summer school teacher 3k dollars to help me with algebra 2. She teaches us very hard methods and you just solved this problem for me in the easiest possible way. Thank you so much.
Just for style. I like it because a generic sine wave can be written as A sin ( [2pi/T ]x) or A sin( [2pi f] x) in which T is the period or f is the frequency (# of cycles per horizontal unit). Indeed,, you definitely don't have to do it the way I chose to.
It's solid. That should not be a problem. If I were in your situation, I would not worry at all. Nevertheless, it is best with all radioactive materials to minimize exposure. This is mainly an alpha emitter, but does have a decay product that is itself a beta emitter. I don't make a habit of playing around with the material, but your situation does not wound worrisome to me.
@@dr.piercesphysicsmath9071 Thanks for your reply. The detector is over 30 years old. The dust had a notably different smell, perhaps from being ionized? It's what made me realize afterwards it was probably a very bad idea. Would the dust I inhaled retain alpha or beta radioactivity for any length of time?
Such a nice explanation, I was looking for the conversion b/w various systems and this video was perfect for clearing my doubts regarding elemental analysis in different coordinate systems. Thank You!!
I’d like to take mp3s of my vocal music (Brahms, Schumann, Schubert, Wolf, Mozart, Bach) - translate them into light frequencies, then transmit my music into the universe. Perhaps to be decoded by other intelligent beings. Perhaps to travel 3.8 billion years to the big bang. Is this possible?
Definitely. On some level, this is already done with radio waves that are already sent out. The signal could also be piggybacked on a laser intensity and be sent out that way. I've been thinking of having a student try using a laser to transmit music down the hallway this way.
Yes, it is. In this problem, we did not just multiply charge density by the total volume [ (4/3)pi Rcubed] because the charge density changes with radius. Instead we find a little bit of charge dQ = charge density * dV in which the charge density is given as r^2 and dV = 4pi r^2 dr and then add up all of the little bits of charge by integrating r^2 * 4pi r^2 dr
But that last ray can make any angle with the principal axis.How did you decide that angle because there are infinite lines that can go through optical center
The center of lens 2 and the point at the top of the image from lens 1 are two points that determine a line. That line can be followed back to lens 1 and then traced back to the top of the original object.
