The first option is true, water vapor helps keep the Earth's heat from escaping into space.
Explanation:
An object that is partly or completely submerged experiences a greater pressure on its bottom surface than on its top.
Answer: 24
Explanation:
Given the following equation:

Where
is the number of mushrooms in a pizza and
the number of pizzas.
If we know the restaurant will make 8 pizzas (
), then:

This is the needed number of mushrooms for 8 pizzas
Answer:
It says about the motion and the graph of the object is stationary, basically travelling at the same speed at any time of the graph. It will never change.
Explanation:
To draw a diagram:
1. Draw an object and represent the speed as stationary and constant at any time.
Answer:
An object's acceleration is the rate its velocity (speed and direction) changes. Therefore, an object can accelerate even if its speed is constant - if its direction changes. If an object's velocity is constant, however, its acceleration will be zero.