The momentum after collision is given by (m1+m2)v where m1 is the mass of car A, m2 us the mass of car B while v is the common velocity after collision.
Therefore, momentum=(2000+4000)5=30000kgm/s to the right.
99% Gas with an abundance hydrogen and helium 1% dust grain, solid frozen particle containing several atoms and molecules.
Answer:
Q2: a) make sure the sugar sample used is constant
b) conduct the experiment twice and use the average
c) the type of container used
Q3: a) out of the three, icing sugar dissolves the fastest
b) substances dissolves faster in warmer waters
Q4: molecules in warmer waters moves at a greater speed than in colder waters, having more kinetic energy and colliding with the solute more frequently. More energy is then transferred to the solute molecules to break their bonds, making them dissolve faster.
Mass Number<span>. An element's </span>mass number<span> (A) is the sum of the </span>number<span> of protons and the </span>number<span> of neutrons. ... Protons and neutrons both weigh about one </span>atomic mass<span> unit or amu. Isotopes of the same element </span>will<span> have the same </span>atomic number<span> but different </span>mass numbers<span>.</span>
I feel like the answer would be B. The chair pushes down on the floor becuase the question says when you sit in a chair, your body exerts a downward force on the chair so it would be pushing downward meaning that the chair would also go down making it push onto the floor.
