Which of the following types of research is conducted on multiple occasions over time? A.
experimental
B.
longitudinal
C.
representative
D.
cross-sectional

Please select the best answer from the choices provided

A
B
C
D

Ababy stroller is a rest on top of a hill which is 10 m high. the stroller and baby have a mass of 20 kg. what is the potential energy of the baby and stroller?

Which notation is used to represent an alpha particle? a. b. c. d.

Agraduated cylinder contains 63.0 ml of water. a piece of gold, which has a density of 19.3 g/ cm3, is added to the water and the volume goes up to 64.5 ml. calculate the mass in grams of the gold that was added to the water. explain how you got your answer.