A car of mass m1 and a trailer of mass m2 are parked on a slope that makes an angle of θ with respect to the horizontal. The car is held in place by a force of static friction from its tires. The wheels on the trailer are free to rotate, have no brakes, and have zero rolling friction. What is the tension in the towbar that connects the car to the trailer?

Explanation:

The tension, T of the tow bar is given by

for the lower side  

Where m is mass, is angle of inclination and a is acceleration

Since when in a stationary state there is no acceleration then the formula can be written as

beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge

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.