Slow twitch muscles are needed for?

a) high intensity, quick, short burst of energy.
b) endurance activities
c) speed or power activities.
d) low endurance and short-duration exercise.

Examine the equation. 23490th→23088ra+42he what kind of barrier would you need to block the radioactive particles from this reaction? a.a piece of paper b.a sheet of aluminum foil c. a two-inch block of lead d. a solid concrete block