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A star is probably visible/detected by it's radiation. But that star may or may not belong to our own galaxy yet news reports speak of detecting a star/nova in a distant galaxy.
How does one determine whether the star she/he views belongs to Milky Way, or some other galaxy or is galactic orphan? Is it merely a matter of the distance to that star?
Standing on the ground 2.7 m from the wall of a building, At what speed should you throw the package so it just barely reaches the window
a glider of 500 gr. is 10 cm. above the table at the beginning of its motion and 6 cm. above the table at the end. what is the theoretical value of kinetic energy at the bottom
A spinning disc rotating at130 rev/min slows and stops 31 s later. How many revolutions did the disc make during this time
A woman stands on a scale in a moving elevator. Her mass is 55.0 kg, and the combined mass of the elevator and scale is an additional 755 kg. What does the scale read (in N) during the acceleration
A 1.20 kg ball and a 4.00 kg ball are connected by a 74.0 cm long massless, rigid rod. What is the rotational kinetic energy of the structure
A uniform metre rule can be balanced at 70.0 cm mark when a mass 0.05kg id hung from the 94.0cm mark. a. draw a diagram of the arrangement b. find the mass of the metre scale
A car of mass m = 1190 kg is traveling down a ? = 14 degree incline. When the car's speed is v0 = 18 m/s, Calculate the distance the car travels down the hill L in meters until it comes to a stop at the end
Two resistors have resistances R(smaller) and R(larger), where R(smaller)
Two children use a homemadetelephone consisting of two paper cups connected by an aluminumwire which is 8.4 m long, find the time for the sound to travel from one cup to the other
A 250 g, 24-cm-diameter plastic disk is spun on an axle through its center by an electric motor. What torque must the motor supply to take the disk from 0 to 1600 rpm in 4.1 s
In Fig. 22-30 the electric field lines on the left have twice theseparation as those on the right. (a) Ifthe magnitude of the field at A is 58 N/C, what is the magnitude ofthe force on a proton at A?
Singly ionized helium He+ is hydrogenlike. (a) Construct a carefully scaled energy level diagram for He+, showing the levels for n=1, 2,3,4,5, and 8. (b) What is the ionization energy of He+?
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