When a neutron is emitted from an unstable nucleus, the atomic mass number of the nucleus
A) does not change.
B) decreases by 2.
C) decreases by 1.
D) increases by 2.
E) increases by 1.
C
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The penumbra caused by an extended light source, as seen in this figure, results from what?
a. The superposition of images from point light sources spread throughout the region covered by the extended source. b. The poorer quality light source in the right hand figure. c. The image of the extended light source on the screen. d. Scattered light from other nearby objects. e. Light leaking into the room from outside sources.
Spreading centers occur along
A) trenches. B) transform faults. C) mid-ocean ridges. D) the northern and western margins of the Juan de Fuca Plate.
What is the magnitude of the magnetic force on a charged particle (Q = 5.0 mC) moving with a speed of 80 km/s in the positive x direction at a point where Bx = 5.0 T, By = -4.0 T, and Bz = 3.0 T?
a. 2.8 N b. 1.6 N c. 1.2 N d. 2.0 N e. 0.4 N
Hoe can you determine your latitude if you live anywhere above the equator
a) Your latitude will be approximately equal to the angular separation of the pointer stars in the Big Dipper b) Your latitude will be approximately the angular separation of the Sun and the Moon c) Your latitude will approximately the altitude of Polaris