A black spider jumps with a velocity of 10 m/s at an angle of 30 degrees. At what time is the spider moving the slowest?

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.

The most important difference between a wedge and an inclined plane is a. their size b. their shape c. how they are used d. what they are made of

Lymphocytes known as blastocysts make antibodies that fight infection. select the best answer from the choices provided t f