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In 2.8 days the number of radioactive nuclei decreases to one-eighth the number present initially
A saturated solution of magnesium hydroxide in equilibrium with undissolved solid is prepared at 25C. The pH of the solution is 11.03. Calculate the value of the Ksp
A 30.0 mL sample of 0.30M HClO (aq) is titrated with 0.20 M NaOH (aq). Ka of HClO is 3.5*10^-8. What is the pH of the solution when 5.0 ml more of NaOH is added in the titration.
A certain superconducting magnet in the form of a solenoid of length 0.520 m can generate a magnetic field of 9.10 T in its core when its coils carry a current of 80 A
Consider three identical metal spheres, A, B, and C. Sphere A carries a charge of -4q. Sphere B carries a charge of -9q. How much charge ends up on sphere C
Three resistors, 28, 46, and 78 %u03A9, are connected in series, and a 0.47-A current passes through them. find the potential difference across the three resistors
Lets suppose if a pure Si crystal has 5 X 10 28 atoms m -3. It is dopped by 1 PPM concentration of pentavelents As( arsenic)
Niobium metal becomes a superconductor when cooled below 9 K. determine the maximum current a 1.95-mm-diameter niobium wire can carry and remain superconducting
A Pb-Sn alloy containing 40 wt% Sn is cooled from the liquid state to room temperature. How much of each phase is present in the material at room temperature. Sketch the expected microstructure.
If a Capacitance of PPC is 12 PF. Distance between its plates is reduced to half, What would the new capacitance of the capacitor
The output voltage of an ideal transformer connected to 240 V a.c mains is 24 volt. Now We have to calculate current in primary coil
Bulb of resistance 10 ohm, connected to an inductor of inductance L is in series with ac source marked 100 V %u2013 50 Hz. Calculate the value of L
A double-slit experiement has slit spacing 0.160 mm. What should be the slit distance L if the bright fringes are to be 4.70 mm apart when the slits are illuminated with 652 nm laser light
What is the Kinetic energy of the Helium atom as it passes the 0 V plate. The mass of the Helium nucleus is 6.64e^-26
A 2.0 uF capacitor is first charged by being connected across a 6.0 V battery. Find the charge on each of the capacitors
You want to store 10^-5 C of charge on a capacitor, but you only have a 100 V voltage source with which to charge it. What must be the value of the capacitance
Andrea thinks she's sitting at rest in her 5.0-m-long dorm room as she does her physics homework. what range is her velocity
X rays with a wavelength of 0.24nm undergo first-order diffraction from a crystal at a 53%u2218 angle of incidence. At what angle does first-order diffraction occur
When the space between two parallel plates is devoid of matter, the capacitance is .47 micro farrads. The dielectric constant is
A 3-MOhms resistor is connected in series with a 2 micro Farrad capacitor and a 6.0 V battery of negligible internal resistance
Suppose the earth suddenly came to halt and ceased revolving around the sun. What would be the earth's speed as it crashed
An automobile batery has 12 V and an internal resistance of .05 ohms. The starter draws 40 amps of current when starting the car. The resistance of the starter is
An 19 ohm resistance is connected across a battery of emf 8 V with an internal resistance 1 ohm. Find the terminal voltage of the battery
A parallel plate capacitor with a plate area of .8m^2 seperated by a .6mm mica sheet. The energy stored in the capacitor is
the U.S. five-cent coin, the nickel, has a mass of 5.1 grams, a volume of 0.719 cm^3, and a total surface area of 8.54 cm^2. how much radiant energy per second comes from the nickel