In one-dimensional motion where the direction is indicated by a plus or minus sign, the average velocity of an object has which of the following properties?
a. It is positive.
c. It is zero.
b. It is negative.
d. It can be positive, negative, or zero.
D
You might also like to view...
An electron moves in a region where the magnetic field is uniform, has a magnitude of 60 ?T, and points in the positive x direction. At t = 0 the electron has a velocity that has an x component of 30 km/s, a y component of 40 km/s, and a z component of zero. What is the radius of the resulting helical path?
a. 4.7 mm b. 18 mm c. 3.8 mm d. 2.8 mm e. 5.7 mm
The corona of the sun can be observed
a. during a lunar eclipse. b. with a coronagraph. c. using filtergrams. d. a and b above e. none of the above
From studies of the masses of individual galaxies and the masses of clusters of galaxies, it is now apparent that up to ________ of the universe is composed of dark matter
Fill in the blank(s) with correct word
The tail of a comet is primarily caused by
A) radiation pressure. B) electromagnetic induction. C) Coulomb repulsion. D) eddy currents. E) nuclear magnetism.