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How much heat (in kcal) is necessary to change 68 g of ice at -33°C into water at 34°C? An insulator has a positive electric charge of 3.1 × 10 -17 C. How many electrons were removed?
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Question: A satellite orbiting the moon very near the surface has a period of 110 min, What is free-fall acceleration on the surface of the moon? The response must be typed, single spaced, must be in times new roman font ...
Question: People have proposed driving motors with the earth's magnetic field. This is possible in principle, but the small field means that unrealistically large currents are needed to produce noticeable torques. Suppos ...
Question: A thin film of MgF_2 (n= 1.38) coats a piece of glass. Constructive interference is observed for the reflection of light with wavelengths of 500 nm and 625 nm. What is the thinnest film for which this can occur ...
Question: You are experimenting with a radioactive sample of polonium. At the end of 14.0 minutes, exactly 1/16 of the polonium remains. What is the corresponding half life (T 1/2 ) of polonium? The response must be type ...
Question: Suppose the emf generated by a coil rotating in a magnetic field is zero at t=0 and increases to its first peak at to=0.11 ms. When is the emf first one-fourth of its maximum, in seconds? When is the emf next o ...
Speedy Mike, driving at 32.0 m/s enters a one-lane tunnel. He then observes a slow-moving van 160m ahead traveling at 5.50 m/s. Mike applies his brakes but can accelerate only at -1.50 m/s^2 because the road is wet. Will ...
Question: To take off from the ground, an airplane must reach a sufficiently high speed. The velocity required for the takeoff, the takeoff velocity, depends on several factors, including the weight of the aircraft and t ...
Problem: A rotating platform of radius R = 4.2cm is initially at rest. It then begins to move, such that a point on its edgeexperiwnces a tangential acceleration of at = 7.5cm/s^2. A) Write an [expression] that gives the ...
Question: A spherical balloon has a radius of 6.95m and is filled with helium. The density of helium is 0.179 kg/m3, and the density of air is 1.29 kg/m3. The skin and structure of the balloon has a mass of 960kg . Negle ...
Question: A straight wire of length L has a positive charge Q distributed along its length. Find the magnitude of the electric field due to the wire at a point located a distance d from one end of the wire along the line ...
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Why might a bank avoid the use of interest rate swaps, even when the institution is exposed to significant interest rate
Describe the difference between zero coupon bonds and coupon bonds. Under what conditions will a coupon bond sell at a p
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