In the straight-ahead direction (q = 0°) in single-slit diffraction, which of the following is observed on the screen?
a. a maximum double in width to the adjacent maxima
b. a minimum double in width to the adjacent minima
c. a maximum equal in width to the adjacent maxima
d. a minimum equal in width to the adjacent minima
A
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New stars are most likely to form in
a. the central bulge of the galaxy, where star density is higher. b. small, individual clouds of cold, dense gas and dust collapsing to form single stars or binaries. c. regions of ionized hydrogen near young, massive O and B stars (H II regions). d. immense clouds of cold, dense gas and dust up to 300 light-years across.
From the lessons learned by the Viking landers, what do scientists believe is the best kind of robotic space mission with the best chance of detecting life on Mars?
A) lander B) rover C) sample return D) orbiter
A block (mass = 4.0 kg) sliding on a horizontal frictionless surface is attached to one end of a horizontal spring (k = 100 N/m) which has its other end fixed. If the maximum distance the block slides from the equilibrium position is equal to 20 cm, what is the speed of the block at an instant when it is a distance of 16 cm from the equilibrium position?
a. 71 cm/s b. 60 cm/s c. 80 cm/s d. 87 cm/s e. 57 cm/s
Meters: A galvanometer has an internal resistance of 100 ? and deflects full-scale at 2.00 mA. What size resistor should be added to it to convert it to a millivoltmeter capable of reading up to 400 mV?
A. 50.0 ? in series B. 50.0 ? in parallel C. 100 ? in series D. 100 ? in parallel