- a cos t
- – a cos t
- a sin t
- –a sin t
- increases from one end to another
- uniform
- varies from point to point
- None of the above
- more in the He filled balloon
- same in both balloons
- more in air filled balloon
- in the ratio of 1 : 4
- Radio waves
- IR waves
- Visible light
- Microwaves
- be reduced by a factor of 2
- be reduced by a factor of 4
- be reduced by a factor of 8
- be reduced by a factor of 16
- 6.2 cm on the front side of the mirror
- 6.2 cm on the back side of the mirror.
- 51.3 cm on the front of the mirror.
- 51.3 cm on the back side of the mirror.
- power into power
- power into power
- mechanical power into power
- none of the above
- low frequency waves
- high frequency waves
- medium frequency waves
- ultrasonic waves
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