An airplane flies in a semi-circular arc in order to simulate “weightlessness” for its occupants. If the radius of the semicircular path it flies is 3500 m, what is the speed at which the plane flies?
A. 357 m/s
B. 580 m/s
C. 185 m/s
D. 1180 m/s
C. 185 m/s
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Velocity: A runner ran the marathon (approximately 42.0 km) in 2 hours and 57 min. What was the average speed of the runner in m/s?
A. 14,200 m/s B. 124 m/s C. 3.95 m/s D. 14.2 m/s
How many quarks are in a tritium isotope, H?
A) 2 B) 3 C) 4 D) 6 E) 9
By itself, ________ makes up 70% of the masses of all the planets combined
Fill in the blank(s) with correct word
An object on the flat bed of a truck that is accelerating along a straight horizontal road. The coefficient of static friction is 0.300 in this case. Of the following choices, which is the lowest value of acceleration that would result in the object sliding on the bed of the truck?
a. 0.280 m/s2 b. 0.310 m/s2 c. 2.93 m/s2 d. 2.99 m/s2 e. 3.02 m/s2