Suppose that the habitat of a species that once lived on land has now become covered in water. in order to survive, the species adapts to have webbed feet. this adaptation likely takes place a. within a week of the habitat change. b. after a single generation. c. immediately. d. over millions of years.

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?