1010 Bq = ______ Ci?
a. 2.7 × 10^-11
c. 0.27
b. 3.7
d. 3.7 × 10^10
C
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A string fixed at both ends is vibrating in its 8th harmonic
(a) How many nodes are on the string? (b) The 8th harmonic wavelength is what fraction of the string length? (c) If the 8th harmonic frequency is 976. Hz, what is the frequency of the 2nd overtone?
Drawing on Eratosthenes' method, if two observers are due north and south of each other and are separated by 400 km, what is the circumference of their spherical world if they see the same star on their meridian at altitudes of 23 degrees and 47
degrees respectively, and at the exact same time? A) 2,000 km B) 4,000 km C) 6,000 km D) 8,000 km E) 12,000 km
In a supermarket, you place a 22.3-N (around 5 lb) bag of oranges on a scale, and the scale starts to oscillate at 2.7 Hz. What is the force constant (spring constant) of the spring of the scale?
A) 650 N/m B) 600 N/m C) 330 N/m D) 820 N/m E) 410 N/m
A supertanker filled with oil has a total mass of 6.1 × 10^8 kg. If the dimensions of the ship are those of a rectangular box 300 meters long, 80 meters wide, and 40 meters high, determine how far the bottom of the ship is below sea level. (rsea = 1 020 kg/m3.)
a. 10 m b. 15 m c. 20 m d. 25 m e. 30 m