Johannes Kepler used math to show that the planets move in perfect circles around the sun.
2 answers:
Kepler actually showed that the planets move around the sun in ellipses, not circles. So the answer is false.
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They compress or expand depending on amount of pressure or depending on the temperature
F=M×A
F=3 ×15
F=45N
so the force is 45 N
Answer:
allotropes
Explanation:
Given forceF
1
=5N and F
2
=7N and θ=60
We know resultant force F=
5
2
+7
2
+2(5)(7)cos60
F=
25+49+35
F=
109
it's your answer
