An ant crawls in a straight line at a constant speed of 0.24 m/s for a distance of 3.0 m, beginning in the corner of a square classroom. It then turns exactly 90 degrees to the right, and proceeds an additional 4.00 m, reaching the far corner of the same wall from which it began. If the second leg was also crawled in half the amount of time as required for the first leg, what was the ant’s average speed for the whole trip?
A. 0.80 m/s
B. 0.27 m/s
C. 0.37 m/s
D. 0.44 m/s
C. 0.37 m/s
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One way to measure and compare the strength of the radio signal at various places in the sky is to produce a(n) _______________ in which each color marks areas of similar radio intensity
Fill in the blank(s) with correct word
The following formulas are supposed to describe the speed 
of a sphere sinking in a thick fluid. C is a unitless constant, 
is the fluid’s density in kg/m3, A is the sphere’s cross-sectional area, m is its mass, and is the gravitational field strength in N/kg. Which could be right?
A. 
= CA g
B. = Cmg/ A
C. = (Cmg/ A)2
D. = (Cmg/ A)1/2
E. None of these can be correct.
A pressure of 3.00 × 10^?7 mm of Hg is achieved in a vacuum system. How many gas molecules are present per liter volume if the temperature is 298 K? (760 mm of Hg = 1 atm, R = 0.082 1 L/atm/mol/K, and NA = 6.02 × 10^23)
a. 6.5E+10 b. 8.6E+16 c. 9.7E+12 d. 1.8E+9 e. 5.7E+14
A(n) ______________ moon occurs when more than one-half of the Moon's surface appears illuminated
Fill in the blank(s) with correct word