Calculate work done by expanding gas of 1
Calculate work done by expanding gas of 1 mole if initial pressure is 4000 Pa, initial volume is 0. 2 m 3. Assume a two processes: (1) isobaric expansion to 0. 3 m 3 (2) isothermal expansion to 0. 3 m 3. 1. Isobaric expansion: Also: A 50% increase in temperature!
2. Isothermal expansion: Also: A ~67% decrease in pressure!
An infinitely long wire, as shown in the figure, is uniformly charged with density of λ. The radius of the ¼ circle is R. Find the electric field at O. ∞ y A∞ A θθ O B B∞ AB x ∞
A uniformly charged sphere (charge density of ρ) with a sphere hole inside is shown in the figure. Find the electric field intensity at the center of the hole. Filled: O Contribution from filled part: d r
Two point charges (q and -2 q) are located at x=1 m and x=-1 m, respectively. Another point charge is located on the X axis. What is the position of this charge so that the net electric force on it is zero?
Find the magnetic field intensity at P. I 30 o r =0. 1 cm P
An electron is passing A with a speed of 104 m/s in a perpendicular magnetic field. Find the radius of the electron’s circular motion and the frequency of the cyclotron. frequency
A straight long wire with current I is placed beside a metallic trapezoid. ab=bc=ad=L. Distance between point d and the wire is l. The trapezoid freely falls a height H from still. Find 1) the instant induced current in the trapezoid when it falls H. 2) the potential difference between dc at that moment. 60 o
A setup of double-slit interference is shown below. D=1. 2 m, d=0. 45 mm. If the distance between adjacent bright lines on the screen is 1. 5 mm. Find the wavelength of the source light. P D △x
In experiment of Fraunhofer diffraction from a single slit, f = 0. 5 m, =5000Å, the width of the slit a=0. 1 mm. Find the width of central maximum asin =2(l /2) the width of central maximum
A space craft with a proper length of L 0=90 m moves at v=0. 8 c with respect to one observer. Measured by the observer, What is the time interval between the craft’s head and end passing through the observer? △t 1 = L/v =2. 25× 10 -7 s
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