A spring-loaded dart gun is used to shoot a 10 gram dart straight up into the air. If the spring constant is 27 N/m and the spring is compressed 21 cm, how far up does the dart go? (Neglect friction and assume the spring is ideal and massless.)

What is the approximate amplitude of this wave a.10 seconds b.15 centimeters c.30 centimeters d.15 seconds

Aprotein molecule in an electrophoresis gel has a negative charge. the exact charge depends on the ph of the solution, but 30 excess electrons is typical. what is the magnitude of the electric force on a protein with this charge in a 1600n/c electric field? write in two significant numbers, and also in newton

What is the gravitational attraction between a dating couple whose centers of mass are 0.630 m apart if the boy weighs 715 n and the girl weighs 465 n?