A0.70-kg block is hung from and stretches a spring that is attached to the ceiling. a second block is attached to the first one, and the amount that the spring stretches from its unstrained length triples. what is the mass of the second block?

Mass of the second block is 1.4 kg

Explanation:

When a weight (mg) is displaced from its equilibrium position in a spring mass system, a restoring force (kx) will act on the weight.

so, mg = -kx

where, k is a constant

Mass of block () = 0.70 kg

For one spring mass system,

For the two spring mass system,

divide equation 2 by 1

on further rearranging,

So, mass of the second block is 1.4 kg.

a

explanation:

no diagram was provided, but i'm guessing it's the one i've attached to my answer.

here, a mechanical force turns the rod.   this generates an electric current in the coil, which powers the bulb.

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.