Two identical steel balls are placed into containers with two different fluids, fluid a and fluid b. both containers have the same depth. both fluids have the same viscosity. the density of fluid a is larger than the density of fluid b. however, both fluids have a density less than that of the steel balls. which ball will reach the bottom of the container first?
a. both balls will reach the bottom at the same time
b. neither ball will ever reach the bottom
c. ball in fluid b
d. ball in fluid a

Which lists the main components of darwin’s theory of evolution? a. random mutations drive evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms do not change. b. natural selection drives evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms change over time. c. natural selection drives evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms change over time. d. random mutations drive evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms do not change.

*drag each tile to the correct location in the sequence* the table shows chronological events in the life of our sun, a medium-sized star. place the missing events into the correct rows of the table.

Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.