Answer:
An object which moves in the negative direction has a negative velocity. If the object is speeding up then its acceleration vector is directed in the same direction as its motion (in this case, a negative acceleration).
Explanation:
The six commonly recognised metalloids are boron, silicon, germanium, arsenic, antimony, and tellurium....
Answer: B Genes make up chromosomes
Explanation: hope it helps
Answer:
Two Neutral
Explanation:
If; One postive, and one negative they would be attracked. >-<
If; one postive and the other was postive, (or vice versa) they would repel <->
they both have an electrical charge, and force.
Neutral's are Nueatral. they have to opisition or attraction= No electrical force.
Answer: 17.5 kN
Explanation:
force downward on student:
mg+142-mv^2/r=0
mg=mv^2/r-142
mv^2/r=mg+142
at bottom, apparent weight
weight=mg+mv^2/r=mg+mg+142
apparent weight= 89(2g)+142
for force at bottom, reverse v^2/r
force=m(g+v^2/r) = 89 ( 9.8 + v^2 / 19 )
F = mg + mv^2 / r
F = mg + mg + 142 = 2mg + 142 = 2 x 89 x 9.8 + 142 = 17.5 kN
