SuperCoaching AE/JE by Testbook
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What force opposes motion between surfaces in contact?
Anonymous Quiz
18%
Gravity
66%
Friction
13%
Inertia
4%
Momentum
What is the limit of (sin(x)/x) as x approaches 0?
Anonymous Quiz
16%
0
62%
1
21%
Infinity
2%
Does not exist
What's the limit of (sin x)/x as x approaches 0?
Anonymous Quiz
17%
0
66%
1
16%
Infinity
1%
Undefined
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A ball is dropped from height 'h'. Air resistance is negligible. At h/2, what's its speed relative to final impact speed?
Anonymous Quiz
15%
1/2
59%
1/√2
18%
√2
8%
2
A satellite orbits Earth at radius 4R (R=Earth's radius). What's its orbital speed relative to a satellite at radius R?
Anonymous Quiz
20%
v/4
53%
v/2
21%
2v
6%
4v
1
What's the derivative of f(x) = x²sin(x)?
Anonymous Quiz
18%
2xcos(x)
18%
x²cos(x)
55%
2xsin(x) + x²cos(x)
10%
2xsin(x) - x²cos(x)
1
Which compound exhibits both ionic & covalent bonding?
Anonymous Quiz
17%
H₂O
44%
NaCl
17%
CH₄
22%
NH₄Cl
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1
Which has the largest ionic radius?
Anonymous Quiz
33%
Mg²⁺
38%
Na⁺
20%
F⁻
9%
O²⁻
1
A ball is thrown upwards. At its highest point, what is its velocity?
Anonymous Quiz
24%
9.8 m/s
17%
Constant
54%
0 m/s
5%
Increasing
1