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Neutron stars consist only of neutrons and have unbelievably high densities. A typical mass and radius for a neutron star might be 2.89E+28 kg and 1.04E+3 m. Calculate the density of such a star.
A long horizontal hose of diameter 3.2 cm is connected to a faucet. At the other end, there is a nozzle of diameter 1 cm. detetmine the velocity of the water in the hose
Vector F= 3xi + 5j + 5z^2k. How much work is done in moving from r0=(0,0,0) to r1=(3,2,1)? how fast will the object be going
the surface of the sun has a temperature of about 5800 k. if the radius of the sun is 7 x 10^8 m, determine the power output of the sun
A disk, initially rotating at 149 rad/s, is slowed down with a constant angular acceleration of magnitude 4.23 rad/s2. (a) Explain by how much time does the disk take to stop? (b) Through what angle (rad) does the disk rotate during that time?
A box of books is initially at rest a distance D = 0.530 m from the end of a wooden board. Find the speed of the box as it reaches the end of the board
A solid disk of radius R and mass 2.66 kg is spinning at angular velocity 66.2 rpm about a vertical axis. What is the mass of the second disk
Two pendula of equal length b and equal masses m connected by a spring of force constant k. Write the Lagrangian for the system, and use it to derive the equations of motion of the system
Two equally charged insulating balls each weigh 0.50 g and hang from a common point by identical threads 30 cm long, What is the magnitude of the charge on each ball
A 36 kg girl and a 7.9 kg sled are on the frictionless ice of a frozen lake, 20 m apart but connected by a rope of negligible mass. How far from the girl's initial position do they meet
The equations of state for electromagnetic radiation in thermodynamic equilibrium with a cavity of volume V at temperature T are P=a T^4/3 and U=a T^4 V, Find the heat capacity for an isochoric (i.e., constant volume) process
a wire is carrying a current in the -x direction. What is the direction of the uniform magnetic field such that the magnetic force is maximized
A figure skater is spinning at a rate of 1.2 rev/s with her arms outstretched. What is her new rate of rotation
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