When light of wavelength 450 nm falls on a single slit of width 0.30 mm, what is the angular width of the central bright region?
A) 0.086°
B) 0.13°
C) 0.17°
D) 0.26°
E) 0.35°
C
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____ has a negative charge and a mass about 1800 times small than a proton
a. A neutron b. An electron c. A molecule d. A nucleus e. An isotope
A ball rolls without slipping down incline A, starting from rest. At the same time, a box starts from rest and slides down incline B, which is identical to incline A except it is frictionless. Which has a larger translational speed at the bottom of the ramp?
1.They have the same translational speed at the bottom of the ramp. 2.the ball 3.the box 4.It is impossible to determine.
Which of the following molecules contains a ketone?
A) a B) b C) c D) a or b E) all of the above
A cart changes its speed from 90 m/s to 100 m/s in 10 seconds. During this interval its acceleration is
A) zero. B) 1 m/s2. C) 10 m/s2. D) none of the above