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A steel rod 1.00m in length is welded to the end of a 2.00m aluminum rod (where the initial lengths were measured at 22C). The combination rod is then heated to 200C. What is the length of the combination rod at this temperature?
A person walks first at a constant speed of 5.10 m/s along a straight line from point to point and then back along the line from to at a constant speed of 2.95 m/s. (a) What is her average speed over the entire trip? (b) What is her average veloci..
Matthew holds a 50 lbs dumbbell in his hand with his elbow flexed at 90 degrees. His forearm is parallel with the ground. What is the torque created by the dumbbell about the elbow joint
A uniform thin spherical shell has a raduis of 2.9 m and mass of 460kg and its center is located at the origin of a coordinate system. find the gravitional force of attraction between the two shells
Assuming a typical efficiency for energy use by the body, how many slices of pizza must you eat to walk for 1.5hr at a speed of 5.0 km/hr
Explain the function of the activator added in trace quantities to many inorganic scintillators. Why are activators not needed in organic scintillators?
a 2.7-kg block is traveling to the right the x direction at 5.1 ms and a second 2.7-kg block is traveling to the left
A girl throws a 0.2 kg ball a distance of 6m straight up in the air (assume no air resistance). What is the kinetic energy of the ball as it leaves the girls hand
whenever the velocity changes there is a non-zero acceleration. the change can be in only the magnitude of the velocity
A step-up transformer increases 15.7V to 110V. What is the current in the secondary as compared to the primary? Assume 100 percent efficiency.
A man with mass 72.9 kg and density 970 kg/m^3 stands in a shallow pool with 33.3% of the volume of his body below water. Calculate the normal force the bottom of the pool
Three positive particles of equal charge +11 uC, are located at the corners of an equilateral triangle of side 15.0 cm. calculate direction of the net force on each particle
An 8cm^3 ice cube is floating in a 10x10x10 cm glass container completely filled with water, How much water is going to spill over when the ice melts
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