A2.00-kg, frictionless block is attached to an ideal spring with force constant 300 n/m. at t=0 the block has velocity -4.00 m/s and displacement +0.200 m.
find:
(a) the amplitude and (b) the phase angle.
c) write an equation for the position as a function of time.
assume x(t) in meters and t in seconds

0.38296 m

1.02132 rad

Explanation:

Angular frequency is given by

Displacement is given by

Velocity is given by

The phase angle is 1.02132 rad

The amplitude is 0.38296 m

The equation is given by

The equation is

0.11 m/s and 0.28 m/s should be correct

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.