Matter is anything that has mass and occupies space, It can exist in 3 states, or phases: solid, liquid, and gas.
Solid molecules are closely packed together and retain a fixed shape.
Liquid molecules aren't packed very closely, and take the shape of the bottom of the container.
Gas molecules are far apart and fill the container
completely.
B i think but im not 100 percent sure
Actions form positive ions while anions forms negative
Data:
F = 150 N
a = 5 m/s^2 (I corrected the units of acceleration)
m = ?
Formula: F = m*a (second Law of Newton).
Solution:
F = m*a => m = F / a
=> m = 150 N / 5 m/s^2 = 30 kg
Answer: the combined mass of the tricycle and toddler is 30 kg.