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A system consists of 3.0 kg water at 80 degrees Celsius 30 J of work is done on the system by stirring with a paddel wheel, while 66 J of heat is removed. What is the change in internal enery of the system?
A hockey stick is swung with an average angular acceleration of 1.5 rad/s2. What is an angular velocity of the stick when it strikes the ball at the end of 0.8 second swing.
Would a plucked guitar sting vibrate for a longer time or a shorter time if the instrument had no sounding board? explain.
An object located 32.1 cm in front of a lens forms an image on a screen 9.5 cm behind the lens. determine the magnification of the object
Find out the magnitude and direction of the rockets acceleration. Give the direction as an angle above the horizonal.
A 2.00×104kg railroad car is rolling at 1.00m/swhen a 5000kg load of gravel is suddenly dropped in.What is the car's speed just after the gravel is loaded
A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.19 x 104 m/s, What is the orbital speed of the second satellite
A javelin is thrown at an initial speed of 28.5 m/s at an initial height of 1.93 m above the ground, Find this maximum range
A wire of length, L, and mass density, ?, is positioned parallel to and directly over another much longer wire. what is the seperation between the two wires
consider two blocks of wood, one having mass of 1 kg and the other having a mass of 2 kg. What is the net force of the bottom block
A 25 g glass tumbler contains 410 mL of water at 24 °C. If two 20 g ice cubes each at a temperature of -3 °C are dropped into the tumbler
A person weighs 670N steps onto a spring scale in the bathroom, and the spring compresses by 0.79 cm. What is the spring constant? And what is the weight of another person who compresses the spring by 0.34 cm.
A 35.0-g bullet moving at 475 m/s strikes a 3.2-kg bag of flour that is on ice, at rest. The bullet passes through the bag, leaving at 225 m/s. How fast is the bag moving while the bullet exits.
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