Author Question: The scientific consensus concerning fusion power reactors is that A) the first commercial fusion ... (Read 61 times)

dbose · **on:** Jul 29, 2018

The scientific consensus concerning fusion power reactors is that

A) the first commercial fusion reactors are already under construction and will be ready for use within ten years.
B) such reactors are already a source of commercially feasible electric power.
C) such reactors could be commercially feasible, but not until the middle of this century.
D) according to present scientific knowledge, it is impossible to build such reactors.
E) such reactors could be built but they will never be a commercially feasible source of electricity.

Question 2

A 2.0-kg ball moving eastward at 3.0 m/s suddenly collides with and sticks to a 4.0-kg ball moving northward at 2.0 m/s. What is the magnitude of the momentum of this system just after the collision?

A) 10 kg m/s B) 6.0 kg m/s C) 8.0 kg m/s D) 2.0 kg m/s E) 14 kg m/s