You look down from the window of an airplane flying at 100 km/h and spot another airplane flying at the same speed in the opposite direction. Relative to you, the speed of the spotted plane is
A. 150 km/h.
B. 100 km/h.
C. 200 km/h.
D. zero.
Answer: C
You might also like to view...
Which of the following is the list of macronutrients needed to sustain good health?
a. vitamin A, C, and iodine b. vitamin A, C, and E c. iodine, protein, and carbohydrate d. protein, carbohydrate, and fats e. protein, carbohydrate, and nucleic acids
If glacial ice were considered a rock, what type of rock would it be, and why? What will be an ideal response?
The capacity of the air to hold water vapor:
A) decreases with an increase in temperature. B) increases with an increase in pressure. C) increases with a decrease in temperature. D) increases with an increase in temperature.
If there were no continents and the Earth did not rotate, the surface wind patterns would be simple: Surface winds would blow from ________
A) the south everywhere on Earth B) west to east everywhere on Earth C) the east in the Southern Hemisphere D) the north in the Northern Hemisphere E) the north in the Southern Hemisphere