If the orbital velocity of an eclipsing binary is 97 km/sec and the smaller star is completely eclipsed in 2 hours, what is the diameter of the smaller star?
a. 175,000 km
b. 350,000 km
c. 194 km
d. 700,000 km
e. 4656 km
D
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Two identical tiny balls of highly compressed matter are 1.50 m apart. When released in an orbiting space station, they accelerate toward each other at 2.00 cm/s2. What is the mass of each of them? (G = 6.67 × 10-11 N ? m2/kg2)
What will be an ideal response?
Pangaea is believed to have broken up about how many years ago?
a. 2000 million b. 2 million c. 20 million d. 200 million
A Ferris wheel with a radius of 14.0 m rotates at a constant rate, completing one revolution in 30.0 s. What is the apparent weight of a 60.0-kg passenger when she is at the bottom of the wheel?
A) 589 N B) 562 N C) 625 N D) 852 N E) 432 N
Two vectors lying in the xy plane are given by the equations 
and 
. The value of 
class="Wirisformula" align="middle" /> is A.
B.
C.
D.
E.