Cindy runs 2 km every morning. she takes 2 minutes for the first 250 meters, 4 minutes for the next $1, 000 meters, one minute for the next 350 meters, and three minutes for the rest. cindy's average speed for the entire run is meters per minute. 1 km is the same as 1000.

Her adverage speed would be 160 meters per second!

If you feel the answer is incorrect please comment and I will revise! Have a good day!

Proof:

2 minutes=250 meters

6 minutes=1,250 meters

7 minutes=1,600 meters

10 minutes= 1,600 meters

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.