dont understand. i got 315 rpm
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find the required angular speed of an ultracentrifuge for the radial acceleration of a point 3.80 cm c m from the axis to equal 3.50×105g 3.50 × 10 5 g .
Find the required angular speed of an ultracentrifuge for the radial acceleration of a point 4.00 cm from the axis to equal 3.60×105g.
Find the required angular speed, , of an ultracentrifuge for the radial accelerationof a point 1.90 from the axis to equal 6.00×105 g (where is the acceleration due to gravity). Express your answer numerically in revolutions perminute.
Calculate the centripetal acceleration of a point 10 cm from the axis of an ultracentrifuge spinning at 50000 rpm. a. 2.7 x 106 m/s2 b. 6.9 x 104 m/s2 c. 4.6 x 105 m/s2 d. 9.9 x 109 m/s2
A particle (m = 2.7 × 10^-28 kg) starting from rest, experiences an acceleration of 2.4 × 10^7 m/s2 for 5.0 s. What is its de Broglie wavelength λ at the end of this period? Please help, I understand that v=at so you need to do 2.4 multiplied 5 and I got 12. Meaning v=12x10^7 Then I did h/mv which is (6.626x10-34)/(2.7x10^-28*12x10^7) and I finally got 2.045x10^-14 but this is still wrong and I don't understand why.
Two point charges of equal and opposite charge ±10−8 C sit a distance of 20 cm apart. What is the strength of the force they exert on each other? If one of the point charges is sitting on a table and has a mass of .010 kg, how close must the second charge be to lift the charge up off the table? What is the electric field strength required to lift the charge of the table? I got the strength...