The rc charging circuit in a camera flash unit has a voltage source of 265 v and a capacitance of 136 μf hint (a) find its resistance r (in ohms) if the capacitor charges to 90.0% of its final value in 16.2 s. (b) find the average current (in a) delivered to the flash bulb if the capacitor discharges 90.0% of its full charge in 1.14 ms.

Newton's law of cooling states that the rate of change in the temperature t(t) of a body is proportional to the difference between the temperature of the medium m(t) and the temperature of the body. that is, startfraction dt over dt endfraction equals upper k left bracket upper m left parenthesis t right parenthesis minus upper t left parenthesis t right parenthesis right bracket , where k is a constant. let kequals0.04 left parenthesis min right parenthesis superscript negative 1 and the temperature of the medium be constant, m(t) font size decreased by 3 equivalent font size decreased by 3 294 kelvins. if the body is initially at 369 kelvins, use euler's method with hequals0.1 min to approximate the temperature of the body after (a) 30 minutes and (b) 60 minutes.

It's time for santa to deliver his presents. assuming he delivers presents all over the world, he has to travel about 75,000,000 miles. if he travels east to west, he can use the time zones to make christmas day last 31 hours. what speed, in miles per hour, must santa fly to get all of his presents delivered?

Using the same approach, determine the magnitude of the magnetic field based on the emf induced at frame 1000, as the loop is exiting the field. note: you need to measure the speed of the loop again–we suggest using a 60-frame interval centered around frame 1000.