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A star has a mass of 1.87 x 1030 kg and is moving in a circular orbit about the center of its galaxy. The radius of the orbit is 3.5 x 104 light-years (1 light-year = 9.5 x 1015 m), and the angular speed of the star is 1.6 x 10-15 rad/s.
(a) Determine the tangential speed of the star.
(b) What is the magnitude of the net force that acts on the star to keep it moving around the center of the galaxy?
A child in a boat throws a 6.0 kg package out horizontally with a speed of 10m/s. Compute the velocity of the boat immediately after, assuming it was initially at rest. The mass of the child is 29kg and that of the boat is 55.0 kg. Overlook water ..
A relaxed crystalline lens has a refractive index n=1.42 and radii of curvature R1=+10.0mm, Calculate the focal length and optical power of the lens
You have a 1200W microwave. When you put a cup of water in for 8 minutes only half evaporates. How eficient is your microwave
A stationary radar operator determines that a ship is 13km south of him. An hour later the same ship is 23km southeast. If the ship moved at constant speed and always in same direction, what was its velocity during this time? (Hint: Take the origi..
Consider three identical metal spheres, A, B, and C. Sphere A carries a charge of +10q. Sphere B carries a charge of -7q. Sphere C carries no net charge. How much charge ends up on sphere C
A laser pulse has an energy of 25 J and a beam radius of 2 mm. The pulse duration is 6 ns and the energy density is constant within the pulse. What is the spatial length of the pulse
The average lifetime of a pi meson in its own frame of reference (i.e., the proper lifetime) is 2.6 10-8 s. What distance would it travel
A 1.0-kg block of ice is initially at 0°C. Heat is added to this system, and the entropy is increased by 357.1 J/K. How much of the ice melts
A car accelerates from rest at a constant rate of 2m/s2 for 5s. At the end of this time the speed of the car is 10 m/s. How far does the car travel in this time
A monatomic ideal gas expands from 1.00 m^3 to 2.5 m^3 at a constant pressure of 2.5 x 10^5 Pa. find the change in internal energy of the gas
5.38 mol of an ideal gas is initially at a pressure of 3.75 atm and a temperature of 268oC While the pressure is kept constant, Determine the new temperature of the gas
In a Young's double slit experiment, if the separation between the two slits is 0.050mm, find the spacing between the first order and second order bright fringes for light with wavelength of 600nm
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