Three galaxies, each of mass M = 4.0 × 10^41 kg, lie in a plane at the corners of an equilateral triangle with sides of 5.0 × 10^22 m length. The magnitude of the force the other two galaxies exert on each galaxy is
a. 4.3 × 10^27 N.
b. 6.4 × 10^27 N.
c. 7.4 × 10^27 N.
d. 8.6 × 10^27 N.
e. 4.3 × 10^28 N.
c
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In a parallel circuit, the size of the current flowing through each device may be different
a. True b. False Indicate whether the statement is true or false
A block of wood has density 0.50 g/cm3 and mass 2250 g. It floats in a container of oil (the oil's density is 0.75 g/cm3). What volume of oil does the wood displace?
a. 3000 cm3 c. 1500 cm3 b. 2250 cm3 d. 1000 cm3
The position of a 0.64-kg mass undergoing simple harmonic motion is given by x = (0.160 m) cos (pt/16). What is its position at t = 6.0 s?
a. 0.160 m c. 0.061 m b. 0.159 m d. 0.089 m
Scientific Notation: Which of the following numbers is the smallest?
A. 15 × 10-3 B. 0.15 × 100 C. 0.00015 × 103 D. 0.00000015 × 106