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The sun, mass 2.0 X 10^30 kg, is revolving regarding the center of the Milky Way galaxy, which is 2.2 X 10^20 m away. It completes one revolution each 2.5 X 10^8 years. Estimate the number of stars in the Milky Way.
(Hint: Suppose for simplicity that the stars are distributed with spherical symmetry about the galactic center and that our sun is basically at the galactic edge)
The index of refraction for red light in water is 1.331 and that for blue light is 1.340. A ray of white light enters the water at an angle of incidence of 60.8°
you are traveling on a plane. the velocity of the plane with respect to the air is 140 ms due east. the velocity of the
The following takes place with inelastic collision. Ball 1 travels up with a mass of 3 Kg and a velocity of 20 m/s. How high do the balls travel after the collision
a find the resistance of a 1.3m length of gold wire with diameter 4.2times10-5m . express your answer to two
The maximum wavelength for which an electomagnetic wave can eject electrons from a platinum surface is 196 nm. what is the maximum speed of the ejected electrons
a solid sphere rolls up an incline plane. what is the direction of the frictional force at the point of contact. next
What is the phase di erence between wavefronts originating from the two slits, at a point on the screen located +Π/10m from the zero'th order?
A chair of weight 135 lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of = 38 directed at an angle of 42 below the horizontal and the chair slides along the floor.
In a local bar, a customer slides an empty beer mug down the counter for a refill, With what velocity did the mug leave the counter
A large storage tank, open at the top and filled with water, develops a small hole in its side at a point 15.8 m below the water level. If the rate of flow from the leak is equal to 2.00 10-3 m3/min, determine the speed at which the water leaves th..
A construction worker uses a steel tape to measure the length of an aluminum support column. what is the measured length when the temperature rises to 29.4°C
Mercury is poured into a U-tube as shown in Figure (a). The left arm of the tube has cross-sectional area A1 of 11.0 cm2, and the right arm has a cross-sectional area A2 of 4.60 cm2.
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