Recent content by Sloan650

all the values i gave were all that was given in the question.

2µA - It is current drain due to the pacemaker circuitry. Im a bit confused, its a past exam question.

Please help?! its for an exam tomorrow!

A pacemaker stimulates heart tissue with R of 100ohms. Pulse amplitude is 1.2 Volts & pulse duration is 0.5ms. Stimulates at 70bpm Current drain = 2microamps Calculate energy delivered to heart from pacemaker at each pulse. i got P=V^2/R = 0.0144 Then Energy = Power*time =...

A pacemaker stimulates heart tissue with R of 100ohms. Pulse amplitude is 1.2 Volts & pulse duration is 0.5ms. Stimulates at 70bpm Current drain = 2microamps Calculate energy delivered to heart from pacemaker at each pulse. i got P=V^2/R = 0.0144 Then Energy = Power*time =...

Two sine waves have equal peak to peak amplitudes 81 but are out of phase by 90 degrees. What is the peak to peak amplitude of the resultant wave. I have no idea how to start this question, could someone give me guidance?

Do I have to multiply out the brackets?

Im so confused :( every time i try to rearrange to find n2 i get math error!

I have no idea how to rearrange this. i know by squaring both sides the sqaure root will disappear. But on the other side Nmax = 1. How does it rearrange so i get a positive number to square root to find n2?

Thank you! I need help rearranging the equation too, I am finding it impossible! Nmax = 4a/lamda x sqaureroot (N1^2 - N2^2) I need to find n2

For n1 = 2.15 and n2 = 1.26, what is the critical angle so that all of the incident light, from medium 1 to medium 2 is reflected? Im using Sin ic = n1/n2 For Sin ic i get =1.706 But the reverse Sin of that comes up math error? HELP

1) Two sine waves have equal peak to peak amplitudes 89 but are out of phase by 180 degrees. What is the peak to peak amplitude of the resultant wave. 2)Two sine waves have equal peak to peak amplitudes 81 but are out of phase by 90 degrees. What is the peak to peak amplitude of the resultant...