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A 0.79-kg block is hung from and stretches a spring that is attached to the ceiling. A second block is attached to the first one, and the amount that the spring stretches from its unstretched length triples. What is the mass of the second block?
Hoover Dam was built in the 1930s to provide electricity for the southwest U.S. and to prevent the wild Colorado River from flooding. how does pressure vary with depth along the wall of the dam
A 1300kg car drives around a flat 190m diameter circular track at 30 m/s. What is the magnitude and direction of net force on the car.
An isolated copper sphere of radius 4.85cm, at first uncharged, is illuminated by ultraviolet light of wavelength 244nm. The work function for copper is 4.70 eV. What charge does the photoelectric effect induce on sphere.
Water flows trough a normal garden hose at 2 m/s. how fast does the water emerge from the hose nozzle
a cylindrical wheel is rotating with a constant angular acceleration of 4.0 rad/s^2. At the instant it reaches an angular speed of 2.0 rad/s, What is the radius of the wheel
Follow that with some of her work on repressed memories. After completing your readings on the WebLink, the textbook, and the PowerPoint presentation, address the prompts for your assignment.
The ball is caught 55.3841m from the thrower. The acceleration due to gravity is 9.81m/s square. Explain how long is it in the air?
A wheel 2.20 m in diameter lies in a vertical plane and rotates about its central axis with a constant angular acceleration of 4.45 rad/s2. find the angular position of the point P
If 80g of ice at -20 oC is placed in 200g of water at 15 oC, how much ice melts, The specific heat of ice is 0.5 cal/g-K
19 g of helium gas are placed in a cylinder with a movable piston. The gas is compressed very slowly from a state of ( p1 = 5atm; v1 = 32 x 10^-3m^3) to a state of (p2 = 17atm; v2 = 9 x 10^-3m^3 )
A 66.5kg astronaut is doing a repair in space on the orbiting space station. She throws a 2.30kg tool away from her at 3.10m/s relative to the space station, With what speed will she begin to move
Two point charges = 2.10 and = -6.40 are 0.100 apart. Point is midway between them; point is 0.080 from and 0.070 from. Take the electric potential to be zero at infinity.
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