What happens when the data in an investigation do not support the original hypothesis?
a. the hypothesis is revised.
b. the scientist gives up and starts an investigation on a new topic.
c. the data are altered so that they support the original hypothesis.
d. the data must be incorrect and are thrown out.

Asmall metal bar, whose initial temperature was 10° c, is dropped into a large container of boiling water. how long will it take the bar to reach 70° c if it is known that its temperature increases 2° during the first second? (the boiling temperature for water is 100° c. round your answer to one decimal place.) sec how long will it take the bar to reach 98° c? (round your answer to one decimal place.)

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

The boy of mass 30 kg is at r1= 2 meters from the fulcrum. of the girl is 45 kg, at what r2 must she sit so that they are balanced ?