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Q. A solid block of mass m2 = 0.5 , at rest on a horizontal frictionless surface, is connected to a relaxed spring (with spring constant k = 150 whose other end is fixed. Another solid block of mass m1 = 2.4 and speed v1 = 2.2 collides with the 0.50 block. If the blocks stick together, what is their speed immediately after the collision?

Q. A charge of -280e is uniformly distributed along a circular arc of radius 3.85 cm, which subtends an angle of 35°. What is the linear charge density along the arc?

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