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physics homework

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I need help with the following questions:

You are driving north on a highway. Then, without changing speed, you round a curve and drive East. What is it that changes when you make this turn? Would it be acceleration, direction, velocity, and distance change?

A kilogram is a measure of an object's ?
would it be mass?

What are the fundamental quantities? Would it be mass, length, time, temperture, electric current, lumionous intentisty, amount of substance.

  • physics homework -

    Yes to #1
    Yes to #2
    #3: Mass, length, time and temperature and electric charge. The other quantities can be defined in terms of those five. Temperature is closely related to energy per particle or per "degree of freedom", but it is usually best to treat it as a fundamental quantity.

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