How do you calculate the pH of 0.001 M NaCl? I was thinking of doing NaCl + H2O ---> HCl + NaOH but I don't know where to go from there if that's even the right step.
I don't quite understand what you mean. I know that those two numbers are not the same. When I changed it to kW, I subtracted 3 powers from the exponent.
Either way, $54.001 isn't the answer, I checked and it failed.
A) An energy plant produces an output potential of 4100 kV and serves a city 121 km away. A high-voltage transmission line carries 1530 A to the city. The effective resistance of a transmission line [wire(s)] is 2.05 Ω/km times the distance from the plant to the city. What is the potential...
A 111 V electric iron draws 8.9 A of current. How much heat is developed per hour? Answer in units of J.
P = IV
P = U/t
U = IVt
U = 8.9(111)(60) = 59274 J
Apparently I'm wrong and I don't know why.
Two small metallic spheres, each of mass 0.28g are suspended as pendulums by light strings from a common point as shown. The spheres are given the same electric charge, and it is found that the two come to equilibrium when each string is at an angle of 5.1 degrees with the vertical. The...
Given: the thermal coefficient of expansion = 2.4 x 10^-5 (degrees C ^-1)
A 2.8 kg block of aluminum is heated at atmospheric pressure so that its temperature increases from 20C to 43C. Find the work done on the aluminum. Answer in units of J.
I originally wanted to do W=P∆V. I could...
Given: latent heat of fusion of water is 333000 J/kg.
A 3.37 g lead bullet at 27 degrees C is fired at a speed of 272 m/s into a large block of ice at 0 degrees C, in which it embeds itself. What quantity of ice melts? Assume the specific heat of lead is 128 J/kg x C. Answer in units of g...
In a machine shop, a hydraulic lift is used to raise heavy equipment for repairs. The system has a small piston with a cross-sectional area of 0.057m^2 and a large piston with a cross-sectional area of 0.208m^2. An engine weighing 2900N rests on the large piston. What force must be applied to...
A certain pendulum clock that works perfectly on Earth is taken to the moon, where g=1.63m/s^2. The clock is started at 12:00:00AM and runs for one Earth day (24 hours). What will be the reading for the hours? Answer in units of h.
I'm stumped. I know that the period for the pendulum on...
That makes sense.
I set the CG x inches away from the front axle, which means that it has to be 130-x inches away from the back axle.
1800(130-x)=2100x
234000=3900x
x=60
So the CG must be 60" away from the front axle, which makes sense.
Thanks
Find the center of gravity of a car with respect to the front axle. There is a distance of 130 inches between the front and back axles. There is a force of 1800lbs on the back axle and 2100lbs on the front axle.
I changed 130 inches to meters and I got 3.30m. I changed both 1800lbs and...
When an unknown weight W was suspended from a spring with an unknown force constant k, it reached its equilibrium position and the spring was stretched 14.2cm because of the weight W. Then the weight W was pulled further down to a position 16cm (1.8cm below its equilibrium position) and...