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10. In the sine wave y = - 3.8 sin ( 450 t), find the instantaneous position at t = 2 s ?

14.What is the amount of electrical current, if the electrical charge of Q = 0.0125 C passing in 0.01 seconds across a wire:

		I =0.000125A
		I = 125A
		I =12.5 A
		I =1.25A

15.If we triplethe amplitude in a sound wave, the energy E will be

		3E
		6E
		9E
		No change in energy

16.Which of the following statement is perfectly acceptable as the properties of sound:

		Sound is a mechanical and transverse wave that propagates in three dimensions
		Sound is a mechanical and longitudinal wave that propagates in one dimension
		Sound is a mechanical and longitudinal wave that propagates in three dimensions
		Sound is a nonmechanical and longitudinal wave that propagates in one dimension