Jill is getting ready to push little frank in his swing. she pulls frank back as high as she can and then releases the swing. what is the initial transfer of energy that accelerates the swing when she lets go?

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

Astudent creates a model of a closed ecosystem by filling a glass tank half full with water, then adding 10 snails and two small aquatic plants. the next day, all the snails are dead. what is the most likely cause of their death?

What would be the result of an alpha particle coming into a magnetic field? a) the alpha particle will stop moving. b) the alpha particle will reverse its direction. c) the alpha particle will be deflected in a curve path. d) the alpha particle will continue to travel in a straight line.