4. (03.09 MC)

Jessica stretches her arms out 0.8 m from the center of her body while holding a 2.0 kg mass in each hand. She then spins around on an ice rink at 1.2 m/s. (4 points)

a. What is the combined angular momentum of the masses?

b. If she pulls her arms in to 0.12 m, what is her new linear speed?

Porque crees que el agua no podia subir mas de 10 m de altura con ese tipo de bomba

Standing side by side ,you and a friend step off a bridge at different times and fall for 1.6s to the water below.your friend goes first,and you follow after he has dropped a distance of 2.0m.when your friend hits the water,is the seperation between the two of you 2.0m or more than 2.0m? verify your answer with a calculation.

Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above