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1. What is the significance of the negative sign in the equation E- = -∇ V ?
2. State Gauss's law.
3. Can we use Gauss's law in each of the following cases: (a) ρv = kρ2, (b) ρv = kρ cos φ, (c) ρv = k/ρ and ρ /= 0, (d) ρv = kr , (e) ρv = kr cos θ , (f ) ρv = kr cos φ?
A block of mass m is suspended from the string a height h above the ground. The string is wrapped around a disk shaped pulley with mass m and radius R. Find out the tension T in the string. (The answer should be in terms of variables). Rotational ..
Two positively-charged particles, each having a charge of 3.00 µC, are placed on the x axis. Find the electric force on a -3.00 µC charge placed on the y axis at y = 0.800 m
Find out an angular momentum of the system
Green light (555 nm) is normally incident on a pair of slits which are 12mircometers apart. How many interference fringes will there be
A box with a total surface area of 1.11 m2 and a wall thickness of 3.1 cm is made of an insulating material. A 12.9 W electric heater inside the box maintains the inside temperature at 16.3C above the outside temperature. Find the thermal conductivit..
The intensity of sound wave A is 100 times that of sound wave B. Relative to wave B, find the sound level of wave A
a ship is floating on a lake. its hold is the interior space beneath its deck the hold is empty and is open to the
An unstable particle called the pion has a mean lifetime of 25 ns in its own rest frame. What is the mean lifetime of the pions as measured in the laboratory frame
A 100-? resistor, an inductor and a 3.0-µF capacitor are connected in series with a time varying emf of 10.0 V and frequency 1000 Hz. What is the inductance of the inductor
An insulating sphere is 8.00cm in diameter and carries a charge of 5.1uC throughout interior volume. Calculate the charge enclosed by a concentric spherical surface
suppose the speci?c heats of milk and coffee are the same as that of water.
A uniform plank of length 2m and mass 10kg is supported at each end. If a 75kg person stands 0.5m from the left end of the plank, find the force exerted on the plank by each support
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