D. both B and C will cause gas pressure to decrease because adding more gas is like adding more energy and reducing the space (volume) the atoms will move more quickly but won't have space, therefore pressure will increase.
Distance= speed * time
So multiply speed and time to get the value of distance
20*9.8 =196 meters
Complete question
The complete question is shown on the first and second uploaded image
Answer:∈
Answer to first question is shown on the second uploaded image.
Part B the Answer is:
The ratio 
is evaluated to be 49.99
Explanation:
The explanation is shown on the third ,fourth and fifth image.
Explanation:
By one dimension, one means motion along a line, or in one particular direction. Think of a car going down a straight road, or a person running on a straight track.
...
1. Motion in one dimension
2. Average velocity.
3. Instantaneous velocity.
Answer:
Explanation:
The main difference is that states with spin angular momentum in the same direction of the field are more high energy that the states with antiparallel spin agular momentum.
The energy for a particular level is
E = -(γ*h/2*π)*m*B
where γ is a constant about magnetic moment, h is the Planck constant, m is the state level and B is the strength of the magnetic field. Its clear that for antiparallel spins m=-1/2 the energy is lower in comparisson with states with m=1/2
In fact
ΔE = γ*h*B/2*π
