A fisherman fishing from a pier observes that the float on his line bobs up and down, taking 2.4 s to move from its highest to its lowest point. He also estimates that the distance between adjacent wave crests is 48 m
What is the speed of the waves going past the pier? A) 1.0 m/s
B) 20 m/s
C) 10 m/s
D) 5.0 m/s
E) 115 m/s
A
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Hubble Space Telescope is still the largest scope ever built
Indicate whether the statement is true or false
Mary builds a simple magnifying telescope using two lenses of focal length 80. cm and 5.0 cm. The respective diameters are 60. mm and 10. mm
How many degrees wide does the moon appear through the telescope if it appears only 1/2 degree wide with the "naked eye"?
An ideal spring stretches by 21.0 cm when a 135-N object is hung from it. If instead you hang a fish from this spring, what is the weight of a fish that would stretch the spring by 31cm
A) 199 N B) 91 N C) 145 N D) 279 N
The percentage composition by mass of nitrogen dioxide is approximately
a. 43% N and 57% O. b. 33% N and 67% O. c. 30% N and 70% O. d. 47% N and 53% O.