Which of the following correctly lists spectral types in order of decreasing temperature (from hottest to coolest)?
A) MKGFABO
B) OBAGFKM
C) OBAFGKM
D) ABFGKMO
E) BAGFKMO
C) OBAFGKM
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An airplane is flying in horizontal flight at a constant velocity. The weight of the airplane is 40,000 N. The wings produce a lift force that is perpendicular to the wings and a drag force that is parallel to the wing. The engine produces a forward thrust force of 2,000 N. Which of the following statements is true?
A. the net force on the airplane is zero B. the net force on the airplane is forward C. the net force on the airplane is upward D. the net force on the airplane is downward E. the net force on the airplane is backward
As I pull a rope connected to a box at constant speed up a frictionless slope, pulling parallel to the slope, the tension in the rope will be:
a. greater than the tension would be if the box were stationary. b. greater than the weight of the box. c. equal to the weight of the box. d. less than the weight of the box.
A long solenoid (n = 80 turns/cm) carries a current of 70 mA. Determine the magnitude of the magnetic field inside the solenoid
What is pseudoscience?
What will be an ideal response?