Force of repulsion between an aluminum and copper nucleus
An aluminum nucleus has 13 protons and 14 neutrons. A copper nucleus has 29 protons and 34 neutrons. What is the force of repulsion between an aluminum nucleus and a copper nucleus when they are separated by 10 to the -9 meters?
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A simple Atwood's machine uses two masses, m1 and m2. Starting from rest, the speed of the two masses is 9.0 m/s at the end of 9.0 s.
What is the external force in N for this particular process at state 1, state 2 and an intermediate state at P1 = 1.5bars? The piston area is 0.05 m^2.
Between flashes, the capacitor recharges through a resistor whose resistance is chosen so the capacitor recharges with a time constant of 3.0 s. Determine the value of the resistance.
Now take the gas in the cylinder alone as your system. Find the work done on the system (gas alone) in kJ. What is work in kJ to overcome friction?
A 0.5452 g sample which contained the monoprotic weak acid, propanoic acid, CH3CH2COOH, was dissolved in ~ 75.0 mL of water and titrated to the equivalence point with 35.81 mL of a 0.0893 M (molarity) NaOH solution.
The system also experiences a decrease in internal energy by 100 kJ, and an increase in potential energy of the center of mass by 100 kJ. Determine whether the center of mass accelerates, decelerates, or remains at uniform speed.
A superconductor wire has a critical temperature of 90K. If the wire is at 77K, and an electromotive force of 6.0V is attached to the wire, how much energy is lost to heat per second if a current of 2 A is running through the wire?
What is the total mechanical energy present at the height given? What is its speed just as it left the ground? What is its maximum height?
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