You walk 53 m to the north, then turn 60° to your right and walk another 45 m. Determine the direction of your displacement vector. Express your answer as an angle relative to east
A) 63° N of E
B) 50° N of E
C) 57° N of E
D) 69° N of E
A
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Science can say nothing about the validity of nonscientific practices that do not make testable predictions
Indicate whether the statement is true or false
A car enters a level, unbanked semi-circular hairpin turn of 300 m radius at a speed of 40 m/s. The coefficient of friction between the tires and the road is ? = 0.25. If the car maintains a constant speed of 40 m/s, it will
A. attempt to dig into the road surface. B. tend to veer toward the center of the semicircle. C. arrive safely at the end of the semicircle. D. tend to veer toward the outside of the circle. E. veer toward the center for the first quarter-circle, then veer toward the outside for the second quarter-circle.
Which of the following cannot be determined from the spectrum of a star?
a. chemical composition b. surface temperature c. radial (along line of sight) velocity d. tangential (perpendicular to line of sight) velocity e. Both c and d
For the plan view shown in the figure, determine the mean radiant temperature at the location shown.
