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A liquid is irregularly stirred in a well-insulated container and thereby experiences a rise in temperature. If the system is the liquid:(a) Has heat been transferred?
(b) Has work been done?
(c) What is the sign of ?U?
In the annual battle of the dorms, students gather on the roofs of Jackson and Walton dorms to launch water balloons at each other with slingshots. Find the initial speed of this second balloon
A 10.0-g wad of sticky clay is hurled horizontally at a 110-g wooden block initially at rest on a horizontal surface. what was the speed of the clay immediately before impact
A rock is thrown vertically upward with a speed of 17.0 m/s from the roof of a building that is 70.0 m above the ground. Assume free fall. A) In how many seconds after being thrown does the rock strike the ground? B) What is the speed of the rock ..
A guitar string of diameter 0.6 mm and length 0.74 m is subject to a tension of 140 N. what is Young's modulus of the string
A spherical water drop 2.6 ?m in diameter is suspended in calm air due to a downward-directed atmospheric electric field of magnitude E = 3800 N/C. How many excess electrons does it have
Gayle runs at a speed of 4.65 m/s and dives on a sled, initially at rest on the top of a frictionless snow covered hill. After she has descended a vertical distance of5.00 m, her brother, who is initially at rest, hops on her back and together they c..
An AC series circuit contains a resistor of 20?, a capacitor of 0.75 ?F and an inductor of 120mH. What frequency should be used to create a resonance condition in the circuit
A rock is dropped into an abandoned mine, and a splash is heard 4s later. how fast the rock was falling when it hit the water
You are hired to design an infra red camera that will detect intruders in the dark. Suppose that the human body is blackbody at 37oC, Find what wavelength should your camera be able to detect
A bicycle with tires 68cmin diameter travels 7.6km how many revolution do the wheel make
when the sun is directly overhead a hawk dives toward the ground with a constant velocity of 5.10 ms at 67.0deg below
A flat sheet of ice (n = 1.309) has a thickness of 2.4cm. It is on top of a flat sheet of crystalline quartz (n= 1.544) that has a thickness of 1.4 cm. Light strikes the ice perpendicularly and travels during it and then through the quartz. In the ti..
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