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Kevin C.
UC Berkeley Graduate, Tutor for 4 years
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Mechanical Engineering
TutorMe
Question:

What are three benefits of heat treating a metal?

Kevin C.
Answer:

Any of the following are correct: Improve hardness Improve softness Improve ability to machine Change grain size Improve resistance to wear/corrosion/heat

Calculus
TutorMe
Question:

Find the derivative of x^3 + 5x^2 - 3sinx

Kevin C.
Answer:

3x^2 + 10x - 3cosx

Physics
TutorMe
Question:

Cart A is sliding on Ice (no friction), with a velocity of 5 m/s. It collides with another cart (cart B) that is stationary. The carts become entangled when they collide and move as one object afterward. What is the velocity of cart A and B after impact. (Both carts are 10 kg)

Kevin C.
Answer:

2.5 m/s

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