SuperCoaching AE/JE by Testbook
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A ball hits a wall at 30° with speed v & rebounds elastically at the same angle. Change in momentum is:
Anonymous Quiz
19%
2mv
29%
0
18%
mv
33%
mvcos(30)
What is the area of a circle with radius 5?
Anonymous Quiz
9%
10π
14%
25
74%
25π
4%
1
What is the limit of (sin x)/x as x approaches 0?
Anonymous Quiz
13%
0
67%
1
20%
Infinity
1%
Undefined
Which element has the highest electronegativity?
Anonymous Quiz
13%
Sodium
67%
Fluorine
17%
Chlorine
2%
Oxygen
Which element has the highest electronegativity?
Anonymous Quiz
56%
Fluorine
20%
Oxygen
20%
Chlorine
4%
Nitrogen
Which molecule exhibits resonance & a non-zero dipole moment?
Anonymous Quiz
19%
CO2
48%
BF3
23%
SO2
11%
CH4
2
What is the derivative of f(x) = x²sin(x)?
Anonymous Quiz
17%
2xcos(x)
46%
x²cos(x) + 2xsin(x)
27%
2sin(x) + x²cos(x)
10%
2xsin(x) - x²cos(x)
1
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A projectile's range is R. At what angle of projection is its range halved if initial velocity is constant?
Anonymous Quiz
5%
15°
47%
30°
23%
60°
25%
45°
2