Need help with the middle question

2.84 s.

Explanation:

From the question given above, the following data were obtained:

Length (L) of string = 2 m

Period (T) =?

The period of oscillation can be obtained as follow:

T = 2π√(L/g)

NOTE:

Pi (π) = 3.14

Acceleration due to gravity (g) = 9.8 m/s².

T = 2 × 3.14 × √(2/9.8)

T = 6.28 × √(2/9.8)

T = 2.84 s

Therefore, the period of oscillation is 2.84 s

0.55x745.7j and a calculator

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.