Spr Fill in the blanks with the correct sphere names to
model how spheres are connected when fossil fuels
are burned.
Read the paragraph, and then complete the model.
Fossil fuels are substances that can be burned to
produce energy. The burning of fossil fuels releases
certain gases into the air. These gases combine with
other chemicals in the air to form substances called
acids. When trees on the top of mountains are exposed to
clouds that contain these acids, the acids remove
substances from the trees that help the trees fight against
harmful insects
Intra

it has to be b, about 97 percent.

the closer the planet is to the sun, the larger the gravity

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.