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Q. A solid copper ballwith a diameter of 3m at sea level is placed on the bottom of the ocean, at a depth of 10 km. If the density of sea water is 1030kg/m^3,how much does the diameter of the ball decrease when it reaches bottom?
Q. A rotating cylinder about 25.00 km long and 9.00 km in diameter is designed to be used as a space colony. with what angular speed must it rotate so that the residents on it will experience the same acceleration due to gravity as on earth? In radians per second.
suppose the apparatus as used in this lab: A cube of mass M = 500 g and side length 30 mm is free to spin on an axis through the center of one face. A massless pulley on this axis has a diameter of 2r = 10 mm. An object with m = 50 g is hung from ..
A bat in a cave emits a sound pulse and receives an echo 0.22 second later. Assuming that the speed of sound is 339 m/s, how far did the sound (the longitudinal wave) travel during this time.
The concrete encloses one steel reinforcing rod with cross-sectional area 1.00cm2. The rod joins two strong end plates. The cross-sectional area of the concrete perpendicular to the rod is 47.5 cm2. Young's modulus for the concrete is 3.00 x 10^10 N/..
A highway curve with a radius of 555 m is banked properly for the car travelling 150 km/h. If a 1650 kg Porshe 928 S rounds the curve at 220 km/h, how much sideways force must the tires exert against the road if the car does not skid.
Liquid nitrogen has a boiling point of 77.3 K and a latent heat of vaporization of 2.01 105 J/kg. A 60.0-W electric heating element is immersed in an insulated vessel containing 46.5 L of liquid nitrogen at its boiling point. How various kilograms of..
Compute the density of entropically raised element of air
Estimate the acceleration of cyclist, and roller coaster.
A professor's office door is 0.90 wide, 2.00 high, 4.00 thick; has a mass of 30, and pivots on frictionless hinges. A "door closer" is attached to door and the top of the door frame. When the door is open and at rest, the door closer exerts the torqu..
The K-shell ionization energy of copper is 8979 eV. The L-shell ionization energy is 951 eV. Determine the wavelength of the Kα emission line of copper. What should be the minimum voltage be on an x-ray tube with a copper target in order to see the K..
A 4.79 crate is suspended from the end of a short vertical rope of negligible mass. An upward force is applied to the end of rope, and the height of the crate above its initial position is given by + (0.61) what is the magnitude of the force when ..
Find out the potential difference between r2 and r1
How does the decrease in gravitational potential energy of a falling ball compare to its increase in kinetic energy.
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