Which experiment would you perform to determine if the total momentum is conserved in a collision? Collide two objects of known masses, and measure the velocity of one object before the collision and the other object after the collision.
Drop two objects from the same height and measure how long it takes them to reach the ground.
Apply the same amount of force to two objects of different mass, and compare the change in their velocities.

I dont understand what the question is

answer: h+ its less than oh

explanation:

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6