Suppose that e = 66.0 v , r = 230 ω and l = 0.170 h . with switch s2 open, switch s1 is left closed until a constant current is established. then s2 is closed and s1 opened, taking the battery out of the circuit. a: what is the initial current in the resistor, just after s2 is closed and s1 is opened? b: what is the current in the resistor at t = 4.50×10−4 s ? c: what is the potential difference between points b and c at t = 4.50×10−4 s ? d: which point is at a higher potential? e: how long does it take the current to decrease to half its initial value? university physics with moderen physics 14th edition

1. how much energy is needed to raise the temperature of 40.0 g of argon from 25c to 40c? the specific heat capacity of argon is 0.520 j/(g·k) 2a. 23.0 ml of 0.100 m hcl (standard) are added from a buret to neutralize 50.0 ml of an unknown basic solution. 2b. if the oh- produced in the previous reaction came from ca(oh)2, then what is the molarity of the ca(oh)2? 3.calculate the new freezing-point of a solution when 60.5 grams of cacl2 solute is dissolved in 0.612 kg of water. 4. what is the maximum number of moles of alcl3 that can be produced from 5.0 mol al and 6.0 mol cl2? 5. a sample of oxygen gas has a volume of 150 ml when its pressure is 0.923 atm. if the pressure is increased to 0.987 atm and the temperature remains constant, what will the new volume be? 6. nitrogen gas in a closed container at a temperature of 100.0 oc and 3.0 atm is heated to 300 oc. what is the pressure of the gas at the higher temperature?