Recent content by larry21

Normally I look at the equation; usually there are 2 variables and I list all possible combinations for them. but in this case, there's only one variable and a 1. What do I do with the 1?

x can be true or false (1 or 0). I still don't know how to proceed...

Homework Statement Using boolean algebra, verify if the identity is true. Draw truth table to verify answers. x XOR 1 = x The Attempt at a Solution x \oplus 1 = x (x’ * 1) + (x * 1’) (x’ * 1) + (x * 0) (x’ * 1) + 0 (x’ * 1) x’ I've proven that the equation is false. How...

Homework Statement Simplify the expression using boolean algebra postulates, laws, theorems. (\overline{\overline{x + \overline{y})(xz + \overline{y}}) + x (\overline{yz}}) The Attempt at a Solution (\overline{\overline{x + \overline{y})(xz + \overline{y}}) + x (\overline{yz}}) 1. ((x +...

Homework Statement Build the truth tables for the boolean expressions. (x + y' * z)' + (x * y * z' + (y + z)') + (y + (x * z')')' The Attempt at a Solution Given that the expression is so complex I believe that I need to simplify first then proceed to build the truth table? Work so...

thanks, that was a great help. However, do I need to convert the "kW" to "W"

An 8.5x10^2kg elevator is pulled up at a constant velocity of 1.00m/s by a 10.0kW electric motor. Calculate the efficiency of the motor. Efficiency = work out/work in * 100 How do I calculate "work out/work in" using the information given?

A raindrop (mass=1.00g) is traveling at a speed of 40m/s when it hits the surface of 100g of water contained in a drinking glass. What is the change in temperature of the water in the glass if we assume that i)all the kinetic energy of the raindrop is converted to energy that changes the water's...

Yes, that is what I thought as well, I just don't know what it meant by "Calculate the molarity of the Co^2+ ion in each of the solutions 1-5" So the above statement just means to calculate the molarity of the Co(NO3)2 solution in each of the 5 diluted solutions?

Homework Statement Calculate the molarity of the Co^2+ ion in each of the solutions 1-5. The new molarity is given by the molarity of the stock solution multiplied by the dilution factor. Solution: Co(NO3)2 Original molarity: 0.160 Dilution #1: none D#2: 12mL to 16mL D#3: 8mL to...