If only one color is absorbed in the pigment of a particular blue paint, that color would be
A) red.
B) yellow.
C) green.
D) blue.
Answer: B
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A charge Q is placed on the x axis at x = +4.0 m. A second charge q is located at the origin. If Q = +75 nC and q = ?8.0 nC, what is the magnitude of the electric field on the y axis at y = +3.0 m?
a. 19 N/C b. 23 N/C c. 32 N/C d. 35 N/C e. 21 N/C
A bubble having a diameter of 1.00 cm is released from the bottom of a swimming pool where the depth is 5.00 m. What will the diameter of the bubble be when it reaches the surface? The temperature of the water at the surface is 20.0°C, whereas it is 15.0°C at the bottom. (The density of water is 1.00 × 10^3 kg/m3.)
a. 1.05 cm b. 1.15 cm c. 1.45 cm d. 1.65 cm e. 1.35 cm
What information about protogalactic gas clouds is contained in quasar absorption lines?
What will be an ideal response?
Water flows in a flexible tube of radius 1.5 cm at the floor level of a house. If the tube is joined to a second tube of smaller radius (1.2 cm), what is the speed of water in this smaller radius tube at a height of 7.2 m above the floor?
A. 8.9 m/s B. 4.5 m/s C. 13.9 m/s D. 11.1 m/s