A laser produces a beam of 4000-nm light. A shutter allows a pulse of light, 30 ps in duration, to pass.
Which of the following is closest to the uncertainty in the energy of a photon in the pulse? ( h = 1.055 10-34 J s = 6.59 10-16 eV s)
A) 10-3 eV B) 10-6 eV C) 10-4 eV D) 10-2 eV E) 10-5 eV
Question 2
A 25-kg wooden sign 3.0-m long by 2.2-m high is supported by two nails along its left edge, one at the bottom of the sign and the other at the top. The nails are on the same vertical line.
Find the horizontal component of the force exerted by the upper nail. A)
250 N
B)
120 N
C)
360 N
D)
170 N
E)
280 N
Portable pulse oximeter and digital probe
Nine pulse sites on the human body.
Use dye specifically made for coolant when checking for leaks using a black light.
Apply light stroking with the palms from hip to ankles as a connecting and finishing technique. ...
Pulse Laser
Light-independent reactions in C3 plants.