What is not a possible source of error? Question 4 options:

people observe things slightly differently and can make mistakes

all answers are sources of error

measuring devices have limits, might be broken, or might be calibrated incorrectly

Lap equipment is not always identical (they can vary)

outside factors can affect te experiment (temperature, humidity, light, wind, etc.)

In a ni-cd battery, a fully charged cell is composed of nickelic hydroxide. nickel is an element that has multiple oxidation states. assume the following proportions of the states: nickel charge proportions found 0 0.17 +2 0.3 +3 0.33 +4 0.5 (a) determine the mean of the nickel charge. enter the answer to 2 decimal places.(b) determine the cumulative distribution function of nickel charge.

How is the shape of the poem “peer” connected to its meaning?

Oil rich countries in the middle east cover about 4% of earths total land area but prossess about 48% of the worlds known oil reserves what is the main reason for high concentration of reserves in this part of the world