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Which element has the electron configuration 1s²2s²2p⁶3s¹?
Anonymous Quiz
40%
Na
43%
Mg
14%
K
3%
Ar
A ball drops from height h. Air resistance is proportional to v. What's its terminal velocity?
Anonymous Quiz
31%
√(gh)
50%
mg/k (k=proportionality constant)
15%
0
4%
infinite
What is the value of 5! ?
Anonymous Quiz
6%
24
83%
120
10%
720
1%
60
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1
A 2kg mass stretches a spring 0.4m. If the mass is pulled down an additional 0.1m and released, what is the period of oscillation?
Anonymous Quiz
17%
0.63s
49%
1.26s
31%
2.52s
3%
3.14s
Which indicator is best for titrating weak acid with strong base?
Anonymous Quiz
22%
Methyl orange
43%
Bromothymol blue
27%
Phenolphthalein
8%
Litmus
A satellite orbits Earth. If its orbital radius doubles, how does its orbital speed change?
Anonymous Quiz
14%
Halves
36%
Doubles
42%
√2 times smaller
8%
√2 times larger
2025/10/16 09:50:47
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