Author Question: A plastic block of dimensions 2.0 cm 3.0 cm 4.0 cm has a mass of 30. grams. What is its density? ... (Read 43 times)

jparksx · **on:** Jul 27, 2018

A plastic block of dimensions 2.0 cm 3.0 cm 4.0 cm has a mass of 30. grams. What is its density?

A) 1.2 g/cm3
B) 1.6 g/cm3
C) 1.3 g/cm3
D) 0.80 g/cm3
E) 2.3 g/cm3

Question 2

A long solenoid produces a field at its center. An identical solenoid is placed end to end with the first (common axis). The magnetic field at the center of the 1st solenoid is now

A) zero.
B) the same.
C) double.
D) four times the original magnitude.
E) half what it was.