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An object with total mass mtotal = 15.8 kg is sitting at rest when it explodes into three pieces. One piece with mass m1 = 4.6 kg moves up and to the left at an angle of ?1 = 19.0° above the –x axis with a speed of v1 = 27.8 m/s. A second piece with mass m2 = 5.4 kg moves down and to the right an angle of ?2 = 24.0° to the right of the -y axis at a speed of v2 = 21.8 m/s. The third mass is 5.8 kg.1) What is the x-component of the velocity of the third piece?2) What is the y-component of the velocity of the third piece?3) What is the magnitude of the velocity of the center of mass of the pieces after the collision?4) Calculate the increase in kinetic energy of the pieces during the explosion.
A 3.1 kg block of copper at a temperature of 72 C is dropped into a bucket containing a mixture of ice and water whose total mass is 1.2 kg. How much ice was in the bucket
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