Bob, Jill, Kim, and Steve measure an object's length, density, mass, and brightness, respectively. Which student must derive a unit of measurement?

A. Bob

B. Jill

C. Kim

D. Steve

So who am i? I mean reall who am i

Solar cells convert the energy of incoming light to electric energy; a good quality cell operates at an efficiency of 15%. Each person in the United States uses energy (for lighting, heating, transportation, etc.) at an average rate of 11 kW.

A person stands 6.00 m from a speaker and 8.00 m from an identical speaker. What is the frequency of the second (n=2) interference minimum (destructive) ? (unit=Hz) ?

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Bob, Jill, Kim, and Steve measure an object's length, density, mass, and brightness, respectively. Which student must derive a unit of measurement? A. Bob B. Jill C. Kim D. Steve

Scientist have changed the model of the atom. what experimental evidence led them to change from the previous model.