The Sun is crossing your meridian right now. When will it cross the meridian next?
A) very close to 23 hours, 56 minutes from now
B) very close to 24 hours from now
C) one year from now
D) It depends on the phase of the Moon.
B) very close to 24 hours from now
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The Sketch mobile app is an example of illustration software.
Answer the following statement true (T) or false (F)
The largest difference between Mars' northern and southern hemispheres is that:
A) the southern appears older, with more impact craters. B) the northern has all the outflows and must have been much hotter. C) the northern is higher overall, despite some high volcanoes in the south. D) the southern has a polar cap, but none ever forms in the north. E) the southern is much darker, with large mare-like basaltic lava flows.
By how much will a slab of concrete 18. m long contract when the temperature drops from 24.°C to -16.°C? (The coefficient of linear thermal expansion for concrete is 12 × 10-6 per degree C.)
A) 1.5 cm B) 0.86 cm C) 70. mm D) 15. cm E) 0.5 cm
What is the mean free path of a gas of randomly-moving hard spheres of radius 2.00 × 10-9 m when the density of spheres is 3.00 × 1019 per cubic meter?
A) 1.17 × 10-4 m B) 4.00 × 10-9 m C) 9.76 × 10-5 m D) 1.88 × 10-3 m E) 4.69 × 10-4 m