You could clay to make the positive charged matter and use the small beads as electrons.
Answer
given,
SAT is 500 with a standard deviation of 100.
a sample of 400 students whose family income was between $70,000 and $80,000 had an average verbal SAT score of 511.
sample mean =
=
= 5
95% confidence level is achieved within +/- 1.960 standard deviations.
1.960 standard deviations x 5 is equal to +/- 9.8
confidence interval = 511 - 9.8 --- 511 + 9.8
= 501.2-----520.8
Answer:
T = 2π/ω = 2π / √(k/m) = 2π / √(60/5) = 1.813... about 1.8 s
Explanation: