You have a set of calipers that can measure thicknesses of a few inches with an uncertainty of ±0.005 inches. You measure the thickness of a deck of 52 cards and get 0.535
inches:
If you now calculate the thickness of 1 card, what is your answer, including its
uncertainty?
You can improve this result by measuring several decks together. If you want to
know the thickness of 1 card with an uncertainty of only 0.00002 in., how many
decks do you need to measure together?

Two horses begin at rest. after a few seconds, horse a is traveling with a velocity of 10 m/s west, while horse b is traveling with a velocity of 13 m/s west. which horse had a greater acceleration? a. horse a because its change in velocity was greater than horse b's in the same time. b. horse b because its change in velocity was greater than horse a's in the same time. c. horse b because its change in velocity was the same as horse a's, but it took less time. d. both horses had the same acceleration.