How did watson and crick determine base pairing?
a.)they analyzed the work of phoebus levene.
b.)they used chargaff's rule to fit the bases together.
c.)they broke the hydrogen bond.
d.)they observed the pairing under a microscope.

1. you serve a volleyball with a mass of 2.1 kg. the ball leaves your hand with a speed of 30 m/s. the ball has energy. calculate it. 2. a baby carriage is sitting at the top of a hill that is 21 m high. the carriage with the baby weighs 12 n. the carriage has energy. calculate it. 3. a car is traveling with a velocity of 40 m/s and has a mass of 1120 kg. the car has . calculate it.