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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 3.8 x 1028 kg and 1.3 x 103 m.
(a) Find the density of such a star.
(b) If a dime (V = 2.0 x 10-7 m3) were made from this material, how much would it weight (in pounds)?
A 15.1 mass fastened to the end of a steel wire with an unstretched length of 0.650 is whirled in a vertical circle with angular velocity 2.00 at the bottom of the circle. The cross-sectional area of the wire is 1.20×10?2 . Calculate the elongatio..
a man with mass m1 61 kg stands at the left end of a uniform boat with mass m2 168 kg and a length l 2.6 m. let the
A strip of doped silicon 325 µm wide contains 9.6 1022 conduction electrons per cubic meter and an insignificant number of holes, What is the thickness of the strip
One yoga exercise, known as the "Downward-Facing Dog," requires stretching your hands straight out above your head and bending down to lean against the floor. Find the normal force that the floor exerts on each foot
In a simple model of the hydrogen atom an electron orbits a proton at 2.18 x 10^6 m/s in a circle radius 5.29 x 10^ -11 m. Find the magnitude of the electron's angular momentum
A platinum resistance thermometer has a resistance of 100ohm at 0 deg and the value of alpha is 0.00385. Calculate the temperature
The masses of the earth and moon are 5.98 × 1024 and 7.35 × 1022 kg, respectively. Identical amounts of charge are placed on each body, such that the net force (gravitational plus electrical) on each is zero. What is the magnitude of the charge place..
A 17.00 kg block is pushed up a frictionless inclined plane that makes an angle of ? = 33 o with the horizontal direction. What force is needed to move the block with constant speed
Object A has a mass of mA = 16.8 kg and an initial velocity of = 8.97 m/s, due east. Object B, however, has a mass of mB = 28.8 kg and an initial velocity of = 4.15 m/s, due north.
Two positive charges of 1.7e-10 C are placed on the x axis at distances +20 cm and -20 cm from the origin, respectively. A third positive charge of 1.5e-11 C can be moved along the y axis. At what value of y the electrostatic force on the third charg..
A 0.25 kg skeet (clay target) is fired at an angle of 28 degrees to the horizontal with a speed of 25.0 m/s, How much higher, h, does the skeet go up
A 73.6 kg weight-watcher wishes to climb a mountain to work off the equivalent of a large piece of chocolate cake rated at 514 (food) Calories. How high must the person climb
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