A train starts from rest and in 30 sec reaches a speed of 20 ms.
There after the speed ramain Steady
for 15 seconds and then decrease
steadily until it stops 5sec later.
What is the distance covered from
start to finished?
Calculate the acceleration during
the motion. ​

iron would move it is magnetic there is a mag field around the current in the wire

the higher the current the higher the mag field around it the higher the influence on the compass

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.