Suppose you observe a binary system containing a main-sequence star and a brown dwarf. The orbital period of the system is 1 year, and the average separation of the system is 1 AU . You then measure the Doppler shifts of the spectral lines from the main-sequence star and the brown dwarf, finding that the orbital speed of the brown dwarf in the system is 23 times greater than that of the main-sequence star.  How massive is the brown dwarf in kg?

Q: For the Galactic Center black hole (Sag. A*), which has mass ~4.1 million solar masses, find the…

A:

Q: Carbon dioxide is metered into an air conduit which is 12 sq ft in cross-sectional area at a…

A:

Q: 2. An insulated cord is made of 2.5 meters long aluminum rod with a diameter of 3.0 mm. what is the…

A: Given, Length L = 2.5 m            Diameter d = 3.0 mm          Radius r = d/2 = 1.5 mm = 1.5 × 10-3…

Q: ww 1dF HH f%360HZ 8002 ele 6 H Calculate the impedance of this circuit. (select closest answer) O…

A: Solution:-Given thatf=60 HzC=1 μF=1×10-6 FL=6 HR=800 ohm

Q: Part G Find the energy of a state of the electron in a hydrogen atom with n = 3, l = 1, j= and the…

A:

Q: Calculate the mass of an electron using the measured value of Compton edge energy and annihilation…

A:

Q: Part II. Kirchhoff's Laws in 3 loops. a. Find the necessary KVL/KCL equations to solve the problem.…

A:

Q: An electron with an energy of 8.0eV is incident on a potential barrier which is 9.2eV high and 0.25…

A: The probability of an electron either being transmitted or reflected from a potential barrier…

Q: Over the course of a customer's lifetime of reading a weekly magazine priced at $4 per issue, what…

A:

Q: If x is the position operator and p, is the momentum operator, then determine (xp.)-(px). Answer…

A:

Q: Compute the maximum possible effective surface temperature for a star like the Sun, i.e., M = Mo, R.…

A: For a star having mass and radius same as that of Sun , the maximum possible effective temperature…

Q: it is more convenient to quantify by selecting the maximum absorption / emission

A: The wavelength of radiation corresponding to maximum absorption is chosen.

Q: If the north poles of two bar magnets are brought close to each other, the magnets will O attract. O…

A:

Q: strate why this fact his sphere decreas

A: It is given that curve is flat.

Q: 2. A beam of parallel rays spreads out after passing through a thin diverging lens, as if the rays…

A: Given data f=40 cm Here, f is the focal length of the lens. Now we have to find out the object and…

Q: The cylindrical surface p = 8 cm contains the surface charge density, ps = 5e-20|=| nC/m². (a) What…

A:

Q: Two strings, A and B, have respective mass densities µA and µB respectively. The linear mass…

A: It is given that the fundamental frequency of the two settings are equal we have to find the ratio…

Q: You go to the doctor and he gives you 13 milligrams of radioactive dye. After 24 minutes, 7.75…

A: Given, An initial dose of the dye, N0=13mg After 24 minutes 7.75mg of the dye remains.…

Q: Determine the angular momentum H, of the 5-kg particle about point O. 3 kg oA \6m/s 2 m _ 2 m 1.5 m…

A: Given data :  Mass of particle , m = 5 Kg  Velocity = 6m/s To find :  Angular momentum about point O

Q: QUESTION 42 You are measuring the final momentum of two objects that stick together after colliding…

A: Momentum is defined as the product of the mass and velocity of an object. It describes the amount of…

Q: Imagine that you have three objects with a same size of electric charges aligned in a line being…

A: We have to find the work done in assembling the three charges of equal charge in line with equal…

Q: Problem #1. Provide the detin following spectroscopic terms, including the equation and units where…

A: When electrons get excited they absorb photons and form absorption spectra. When they come back they…

Q: 2 A studet claims that almost all of the energy that we use today is due to the Sun in some way.…

A: Yes. The claim of the student is true. Majority of energy that we use today has its source as Sun.

Q: (hrwc13p20) Two concentric shells of uniform density having masses M, and M, are situated as shown…

A: Given two concentric shells of uniform density having masses, M1 and M2 are situated as shown in the…

Q: Doppler Effect

A: Doppler effect as Doppler effect defined as the change in frequency of a wave in relation to an…

Q: For the mass distributions in Problems 5 to 7, fir the inertia tensor about the origin, and find the…

A:

Q: 24. A new fictional nucleon was just discovered! It has a mass of 2 AMU and a charge of +3 with a…

A:

Q: 3. Plot the behavior of magnetic susceptibility (x) of paramagnetic and ferromagnetic substances as…

A: We have to plot the behaviour of magnetic susceptibility with temperature and find the Curie's…

Q: 5.) Pineapple fruits with a mass of 500 kg are supplied to a cold storage at 20 C. The cold storage…

A: Solution: Calculate the total heat removed per minute. The refrigeration capacity is defined in…

Q: 4. A glass flask of volume 200 cc is just filled with mercury at 20°C. How much mercury will…

A:

Q: Consider a square waveguide, with transverse dimensions a = b = 10.668 mm. The waveguide is filled…

A:

Q: 3. Plot the behavior of magnetic susceptibility (x) of paramagnetic and ferromagnetic substances as…

A: We have to find the plot of susceptibility with temperature for para and ferro magnetic substance…

Q: The Earth's magnetic field is 2.0 z 10-3 T, inclined downwards at an angle of 20° to the horizontal.…

A: GivenB=2×10-5Tθ=20°Area of coil=0.20×0.20N=80

Q: Three coherent point sources S1, Sz and Sa are placed on a line perpendicular to the screen as shown…

A: The minimum(non zero) distance x of a point P on the screen at which complete darkness is obtained.…

Q: Q1. Two centrifugal pumps are connected in parallel in a given pumping system. Plot total head Ah…

A:

Q: A 21 g bullet is traveling with a horizontal velocity of 660 m/s when it hits a Mindcraft block öf…

A: A body's velocity is the distance it travels per unit of time.  By definition, it is the distance…

Q: MO-6 The Meteor Crater in Arizona is about 1,200m wide and 200m deep. It is believed to have been…

A:

Q: Comet C/1995 O1 (Hale-Bopp) has a gas production rate for H2O of Q = 8.35 x 1030 molecules per…

A: Estimate the radius of its nucleus in km. gas production rateQ= 8.35×1030 moleculessExpansion…

Q: You are studying a very distant quasar and are trying to determine how far away it is. The quasar is…

A: Given, λo = 121.6 nmλob = 130 nm

Q: What are the physical principles behind the action of the heat sinks? That is, how do they reduce…

A: The heat sinks are basically a heat exchanges used to transfer heat from the device. The heat is…

Q: Consider a slab made of three different materials X, Y, and Z. Light in the air is incident upon its…

A: The question can be solved as follows

Q: m 9:   Two amounts of salt water at different temperatures are brought into thermal contact with…

A: Solution 9 : a). The given quantities are as follows: m1=0.302 kg,T1=8.61°C,m2=0.873…

Q: 6. Discuss how the relative density of mass, radiation (primarily from the Big Bang) and dark energy…

A: Effect of expanding universe on relative density, radiation, and dark energy. Density of matter…

Q: Calculate the current (in A) through a 9.0-m long 22 gauge (the radius is 0.321 mm) nichrome wire if…

A: Solution:-Given thatLength of nichrome wire (L)=9 mRadius of nichrome wire (R)=0.321 mm=0.321×10-3…

Q: A coaxial cable with inner radius 0.44 mm and outer radius 1.69 mm has a dielectric for which ϵR =…

A:

Q: a) speed of the ball at points A, B, Cand D, from fastest to slowest, b) kinetic energy from most to…

A: Here we have to use conservation of total mechanical energy. Where kinetic energy is maximum, speed…

Q: 3 2x x. Q5: The normalized wave function for a particle in 1-D box is Y(x)=. sin( sin Find the…

A:

Q: For an electron in the 1s state of hydrogen, what is the probability of being in a spherical shell…

A:

Q: Heat is transferred steadily through a 0.02-cm thick 9-m x 4-m wall at a rate of 1.6 kW. The inner…

A:

Q: An electric field in free space is E = (5z²/e0) â. V/m. Find the total charge contained within a…

A: