Astronomical observations of our Milky Way galaxy indicate that it has a mass of about 8.0 • 1011 solar masses. A star orbiting on the galaxy’s periphery is about 6.0 • 104 light years from its center. What should the orbital period of that star be in years?

Q: (i) At room temperature a pure crystal has electron and hole concentration n-p3n,-1.5*10 cm, and ele...

A: Given: Electron and hole concentration, n=p=ni=1.5×1010 cm3 Electron drift mobilities, μe=1350 cm2/V...

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Q: A spherical blackbody radiator with a diameter of 1.40 m is held at a constant temperature. What is ...

A: Solution:-Given that(1) Spherical blackbody radiatorDiameter (d)=1.4 mPower radiated by the body=13....

Q: The energy ɛ, for band electrons as a function of the wave vector k in the first Brillouin zone <ks ...

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Q: (1) At room temperature a pure crystal has electron and hole concentration n-p=n,1.5 10 cm, and elec...

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Q: 6. A 50.-ohm resistor, an unknown Pesistor R, a connected in a complete circuit. The ammeter reads 0...

A: D and F have been asked to solve (specifically),

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Q: 4. Calculate the number density of the negative Hydrogen ion (H-), relative to neutral Hydrogen in t...

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Q: nd it... .

A: As we know that in a simple harmonic oscillation,  (Maximum velocity) Vmax = A ω ------(1) Where A i...

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Q: An industrial aluminum ring has an inner diameter of 2.0 m at 30.0 degrees Celsius. If the ring is p...

A:   Given:                             Inner diameter (d0)=2.0mInner temperature (T0)=30∘CFreezing tem...

Q: Ry Ez Rg www R, R6 Rg e R3 Rs Rz a Suppose you have the following circuit diagram. Here R1=2.2kN, R2...

A: (a) R7 and R9 are in parallel combination. R79=R7×R9R7+R9=1.83kΩ R79 and R8 are in series combinatio...

Q: 3. A 1000-kg homogeneous bar AB is suspended from two cables AC and BD, each with cross-sectional ar...

A: Given m=1000 kgA=400 mm2σAC=100 MPaσBD=50 MPaL=2m

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A: The radiation emitted by any object is related to the surface temperature of the object as λT=2.898×...

Q: Example 6: In a scattering problem, the scattering length 'a’ is defind by a = lim [-f(0)] E0 Show t...

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Q: A particle undergoes a simple harmonic motion with an amplitude A and a total energy E. When the dis...

A: Given, displacement x = ±A2 For a simple harmonic motion, the kinetic energy K is               K = ...

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A: Since the formula of force is given as: F=m a  F/a = m  

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Q: A 2 m3 air tank has an initial pressure of 270 Kpa and final condition of 520 Kpa and 300oC. Determ...

A: Given data V1=2 m3P1=270 kPaT2=300°CP2=520 kPa Here, P represents the pressure, V represents the vol...

Q: In the figure the current in resistance 6 is i 1.30 A and the resistances are R - R2- Ry- 1.66 0. R-...

A: Solution:-Given thatI6=1.3 AR1=R2=R3=1.66 ΩR4=14.1 ΩR5=8.63 ΩR6=4.1 Ω  

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Q: 12. A point source of 5-MeV y-rays with intensity 3 x 103 y-rays/cm2- sec is shielded with 50 cm of ...

A: Given: The energy of the Gamma-rays is E = 5 MeV The intensity of the point source is I0 = 3 x 103 r...

Q: NEWTON'S SECOND LAW OF MOTION Mass of cart = 7 kg Distance Travelled = 2 m Acceleration, m/s2 Tensio...

A: Concept: The Schematic Diagram of the system is Given: The Mass of the Cart=7kg Distance moved= 2 m...

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Q: 2. An astronaut left the International Space Station to test a new space scooter. Her partner measur...

A: Given that:_Time, t=10 secInitial velocity, vi=15 m/sFinal velocity, vi=5 m/sCase-01Average accelera...

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A: Dimensional analysis is a way of checking the validity of an equation. If an equation is dimensional...

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Q: w flow rate if the tube is replaced by one having 4.6 times the length.     Part (d)  Calculate the ...

A: Given as, Px = 2.5ηx = 3.2rx = 0.14lx = 4.6Q = 110 cm3/s   As per protocol, allowed to answer first ...

Q: Consider a small pot with a copper base. The base has a thickness of 1.74 mm and a diameter of 15.1 ...

A: Solution:-Given thatCopper base thickness (t)=1.74 mm=0.00174 mDiameter (d)=15.1 cm =0.151 mWater te...

Q: 1. a) What are the energy and momentum of a photon of red light of wavelength 650 nm? (b) What is th...

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Q: 72. At each corner of a cube of side & there is a point charge Q. Fig. 23-34. (a) What is the potent...

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Q: have to answer soon.! Find it.?

A: We know capacitive  reactance can be given asXc=12πfC...........(1)Also,I=VXcXc=VI............(2)

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Q: Consider figure E and answer questions 18 to question 23. The skier starts from rest at A at height ...

A: “Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for y...

Q: 4. JAn alpha-particle (m = 6.64x1027 kg) and a charge of +2e is shot upward (relative to the Earth's...

A: Given, Mass, m=6.67×10-27kg Electric field, E→=15000i^-26000j^N/C a. The magnitude of an electric fi...

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Q: The searchlight on a yacht is being used to illuminate a sunken chest. At what angle of incidence sh...

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Q: Ampere second is unit of (a) capacitance (b) charge (c) energy (d) power

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Q: A "long" hollowed out cylinder of inner radius R and outer radius 2R carries a uniform charge densit...

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Q: Example-38: By transforming to a triple integral evaluate (x'dydz +x* ydzdx+x'z dr dy) I = where S i...

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Q: [M][LF [T] [T] [L] [T] = ?

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Q: ntensity at lo gotro

A: Radius of the sphere is R Charge on the outside of the surface of sphere is q Intensity at a point P...

Q: Q) A particle of mass 4 kg rests on a smooth horizontal surface and is attached to a horizontal spri...

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Q: A fruit juice is being heated in an indirect heat exchanger using steam as a heating medium. The pro...

A: Solution:-Given thatmass flow rate of product (m.p)=1500 kg/hrInlet temperature of product (Tpi)=20°...

Q: Water flows out of a hole of cross-sectional area a = 2 cm? from a big tank. The water flows at a ra...

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Q: A 10.0 kg block sliding on a frictionless horizontal surface at 7.00 m/s hits a spring that is attac...

A: Given that,Mass : m = 10 kgSpeed : v = 7 (m/sec)k = 5000 (N/m)(a) : Here we need to find the workdon...

Q: A lamp is connected to 120-volt line. When the switch is first turned on and the filament is cold, t...

A: Given that:Supplied voltage, V=120 VIcold=8.0 AIhot=0.50 A  

Q: 6. A 100 g sample of substance X absorbs 630 J of heat to raise its temperature from 25" C to 75 C. ...

A: Given, m=100gQ=630 JT1=250CT2=750C