Some devices use electromagnetic waves to find the location and spe device. By knowing the speed of the wave and the time it takes the w
this type of device?
O A
Gamma waves would be the safest choice because t
B
Ultraviolet waves would be the safest choice becaus
С
Radio waves would be the safest choice because the
D
X-rays would be the safest choice because they are

How does the image distance (di) of a convex lens compare with the image distance of a concave lens? a. the image distance of the convex lens is positive, and that of the concave lens is negative. b. both are negative for a virtual image. c. both are positive for a virtual image d. the image distance of the convex lens is negative, and that of the concave lens is positive.

15. one purpose of the tread pattern on a tire is to a reduce tire wear. b. reduce traction c. allow water to flow away from the tire. d. look impressive.

Which of the following harmful chemicals are found in tobacco smoke? a. carbon monoxide b. carbon dioxide c. nicotine b. carbon dioxide d. both a and c