What was the main difference between the time capsules carried on the Pioneer probes and the time capsules carried on the Voyager probes?
A) no difference, the time capsules were identical
B) the time capsule on Voyager contained a record with video and audio messages
C) the time capsule on Pioneer contained a record with video and audio messages
D) the time capsule on Voyager contained video, but no audio
B
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Estimate the time required to heat the center of a 1.5-kg roast in a 163°C oven to 77°C. State your assumptions carefully and compare your results with cooking instructions in a standard cookbook.
GIVEN
FIND
The time required to heat the roast
ASSUMPTIONS
SKETCH
Characteristics of Waves: What is the frequency of a pressure wave of wavelength 2.5 m that is traveling at 1400 m/s?
A. 178 Hz B. 1.78 kHz C. 560 Hz D. 5.6 kHz
The following images show Earth and the four jovian planets of our solar system. Rank these planets from left to right based on their mass, from lowest to highest. (Not to scale.)
A small object is enclosed in plastic (n = 1.5). The object appears to be 4.0 cm below the surface. What is the actual distance of the object below the surface?
B. 2.7 cm C. 4.0 cm D. 5.5 cm E. 6.0 cm