How is the Mars Rover mission different from Global Surveyor mapping mission?
What will be an ideal response?
The Mars Rover mission landed two probes, Spirit and Opportunity, on the surface. They have travel over the surface collecting and analyzing samples.
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Which of the following is not an inertial reference frame?
A) a reference frame that is rotating at a constant rate B) a reference frame that is moving downward at a constant speed C) a reference frame that is moving westward at 10 km/s D) a reference frame that is motionless E) a reference frame that is moving upward at a constant speed
Which of the following would decrease the magnification of a compound microscope?
a. Replacing the objective lens with one of larger diameter. b. Replacing the eyepiece lens with one of shorter focal length. c. Replacing the eyepiece lens with one of smaller diameter. d. Replacing the objective lens with one of longer focal length.
What does it mean for an atom to be ionized?
a. An atom is only considered ionized if it has *fewer* bounded electrons than protons, causing it to have a net positive charge. b. An atom is only considered ionized if it has *more* bounded electrons than protons, causing it to have a net negative charge. c. An atom is only considered ionized if it has more or fewer bounded electrons than protons, causing it to have a non-zero charge. d. An atom is only considered ionized if it has the same number of bounded electrons and protons, causing it to have a neutral, or net zero charge.
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