A common way a robotic spacecraft can be accelerated and have its trajectory changed without the use of any fuel is via
A) a gravitational slingshot from another spacecraft
B) radiation pressure from the Sun
C) the ejection of mass from the probe
D) a gravitational slingshot from another planet
D
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A container having a volume of 1.0 m3 holds 5.0 moles of helium gas at 50°C. If the helium behaves like an ideal gas, the total energy of the system is
a. 2.0 × 10^4 J. b. 2.5 × 10^4 J. c. 1.7 × 10^3 J. d. 1.5 × 10^3 J. e. 4.0 × 10^4 J.
A plate sliding into a subduction zone can trigger ____
a. midocean rise b. cratering c. volcanism d. hurricanes e. erosion
What is the limiting angle of resolution for the eye if the pupil diameter of the eye is 4.0 mm, the wavelength of the light is 600 nm, and index of refraction of the liquid in the eye is 1.34?
A) 0.42 mrad B) 0.21 mrad C) 0.14 mrad D) 0.11 mrad E) 0.26 mrad
Good tracers of the spiral tracers are all I. very old. II. very young. III. very luminous. IV. moving with large radial velocities
a. I & III b. I & IV c. II & III d. II & IV e. I, III, & IV