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One of the moving parts of an engine contains 1.64kg of aluminum and 0.311kg of iron and is designed to operate at 214 degrees C. How much heat is required to raise its temperature from 21.0 degrees C to 214 degrees C?
The inverse-square law says that the intensity that you hear/measure of a sound changes depending on how far away you are from the sound source. More precisely, it is inversely proportional to the square of thedistance from the sound source. That is,..
The second-order fringe of 660 nm light is observed at an angle of 21° when the light falls on two narrow slits that are 3.68 μm apart. at what angle would we expect it to be observed
Two point charges are placed on the x axis as follows: chargeq1= -1.50 nC is located at x=.200m, and a charge q2= +5.00 nC is atx=-.300m. What are the magnitude and direction of the net forceexerted bu these two charges on a negative point charge q3=..
Suppose the ray, in air with n =1.00, enters a slab with n = 2.34 at a 30.9°angle with respect to the normal, then exits the bottom of the slabinto water, with n = 1.33. At what angle to the normaldoes the ray leave the slab?
A proton beam in an accelerator carries a current of 115µA. If the beam is incident on a target, how many protons strike the target in a period of 26.0s?
A single string of length 3.22 meter is made up of two separate shorter strings, C and D, spliced together. Evaluate what is the length of string C
A web page designer creates an animation in which a dot on a computer screen has a position of r "" [4.0 cm +(2.5 cm/s2),z]i + (5.0 cm/s)IJ. (a) Find the magnitude ami direction of the dot's average velocity between I = 0 and I = 2.0 s. (b) Find t..
On a very large distant screen, how many totally dark fringes (indicating complete cancellation) will there be, including both sides of the central bright spot? Solve this problem without calculating all the angles! (Hint: What is the largest that..
Two 480g blocks of wood are 2.0 m apart on a frictionless table. A 9.0g bullet is fired at 440m/stoward the blocks. What is the speed of the second block after the bullet stops
Two planets are on a collision course, heading directly toward each other at 0.250c. A spaceship sent from one planet approaches the second at 0.750c as seen by the second planet. find the velocity of the ship relative to the first planet
The sun radiates energy at the rate 3.8×1026W. The source of this energy is fusion, a nuclear reaction in which mass is transformed into energy. How much mass does the sun lose each year
a spherical ball hanging on a string on a smooth, frictionless wall. The mass of the ball is m, its radius is R, and the length of the spring is L. Find the normal force between the ball and the wall
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