SuperCoaching AE/JE by Testbook
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A satellite orbits Earth at radius 2R (R=Earth's radius). Its velocity is v. What's the velocity at radius 4R?
Anonymous Quiz
10%
v/2
57%
v/√2
23%
2v
9%
√2v
👍1
A photon's energy doubles. What happens to its momentum?
Anonymous Quiz
9%
Halves
54%
Doubles
32%
Quadruples
5%
Remains same
A ball is thrown upwards. At its highest point, its:
Anonymous Quiz
9%
Velocity is max.
46%
Acceleration is zero.
40%
Velocity is zero.
5%
Acceleration is max.
👍1
What's the limit of (sin x)/x as x approaches 0?
Anonymous Quiz
17%
0
59%
1
22%
3%
Undefined
Which element has the electron configuration 1s²2s²2p⁶3s¹?
Anonymous Quiz
39%
Na
44%
Mg
15%
K
3%
Ar
1