Question 1 Electrostatics 1) 5 billion electrons congregate in the circle below (like bees on a hive). What is the charge in Coulombs (C). include (+) or (-) O Show work here: 3 billion electrons departed from the circle below. What is the charge ? figure the charge q, with the proper sign (+) or (-). O\fquestion 1 c The distance between the 2 previous charges is 50 cm [note units) What is the force between them ? (attract or repel) Question 2 3 resistors ( 17 0, 34 0 , 40 0 ) are wired in parallel with a 48 volt battery a) Draw the circuit, b) Determine the equivalent resistance c) Determine total current d) Total power Page 4 of 10Question 3 The same 3 resistors l 17 n. 34H. 40 n} are now wired in SERIES with the same battery a) draw the circuit, b) determine the total resistance c) determine total current d) total power Q4 R1 R2 110 0 110 0 Combo circuit. RA 24 V 2 220 0 'Reduce' it and find: R3 180 0 Req total total power Page 6 of 10Question 5 some ultrasound waves have frequency of 2 million Hertz, and they travel at 345 m/s. a) Use the wave equation and determine the wavelength of these waves. show work b) if the frequency of the wave increases, what happens to the wavelength ? c) draw 3 cycles of the wave below, label the x-axisQuestion 6 See the wave below. Its traveling in the positive x-direction with a frequency of 50 Hz. A 24 cm 13 cm a) what is the wavelength ? b) what is the amplitude ? c) what is the period ? d) what is its speed ? include proper units for all Page 8 of 10Q7: lawn mowers produce sound waves that travel in all directions. The sound power at the source is 14 watt. a) What is the sound intensity 10 meters away ? b) What is the sound intensity 30 meters away ? c) what is dB level at 30 meters ? (compared to threshold of hearing) Page 9 of 10Q8 The speed of sound is about 345 m/s. Speed of light is 3 x 108 m/s a) How long (time) does it take the fireworks sound to reach your ears 1609 m away ? b) How long (time) doe it take for the fireworks light to reach you ? Page 10 of 10