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In a circle of radius 180 cm, and arc 276 cm long subtends an angle of how many radians? How many degrees? Vector A makes an angle of 20° and B makes an angle of 110° with the x axis. The magnitudes of A= 20 mag of b = 30. Find angle of resultant? Write each as a single mixed number (with the fraction being proper): a) 2 5/84 + 5 27/28
b) 1 3/5 − 4 2/3
c) 2 1/2 × 1/2
d) 3 9/17 ÷ 3/17? A truck moves away from you. If its horn has an actual frequency of 475 Hz what frequency would you hear as it moves away at 20 m/s? What are 2 characteristics of high mass stars?