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Q. A car travelling in a large circle passes by the motorcycle that is travelling in a straight line from North to South. Both of their speedometers read 10m/s. which statement below is true? A. The car and the motorcycle have the equal speed, but different velocities. B. The car and the motorcycle have the same velocity, other than different speeds. C. The car and the motorcycle have the same speed and velocity. D. The car and motorcycle have different speed and different velocity.

Q. A metal bar 1.60m long at room temperature, 21c the bar is put into an oven and heated to a temperature of 84c.It is then measured and found to be 1.7 mm longer. What is the coefficient of linear expansion of this material?

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