15 POINTS Q10. Using a digital voltmeter, you measure the voltage of a 9 Volt battery to be 23.1244 Volts. Discuss both the accuracy and precision of this measurement.

Q11. The label on a can of corn in my cabinet states it contains 432g (assume this value is correct). I pour out the contents and find the mass to be 430g. Discuss both the accuracy and precision of my measurement.

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct

Consider a system to be two train cars traveling toward each other. what is the total momentum of the system before the train cars collide?   kg • what must the total momentum of the system be after the train cars collide?   kg •  

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell