A box is at rest on the ground. An unbalanced force acts on the box and causes it to start moving. The box moves 10 meters in 2 seconds and then stops. Why did the box stop moving? What is the box's average speed?

Melting glaciers is a serious threat to the environment what is the possible consequence of melting glaciers on polar bears?

The illustration shown is an ovum, a female sex cell. a mutation in this cell may be passed to the woman’s offspring during a) birth. b) mitosis. c) dna replication. d) sexual reproduction

Which of the following is likely not involved in this example of ecological succession? a) the rotting remains of plants add to the fertility of the soil. b)the soil becomes so fertile that eel grass is replaced by other plant species. c) the roots from plants stabilize the sediment, keeping it in place. d) the concentration of salt becomes so high that all plant life is destroyed.