(c) The activity of a sample of potassium-40 is measured 3 times.
The measurements are given below.
4906 Bg
4956 B9
4889 Bg
Which of the following statements explains why the readings are different?
Tick one box

Alice added sodium chloride to water and stirred the water for several minutes. alice is most likely trying to demonstrate that ionic compounds a. are hard. b. can dissolve. c. are clear. d. can melt.

If the textbook weighs 19.6 newtons on venus,what is the strength of gravity on venus?

Abatter hits a 0.140-kg baseball that was approaching him at 30 m/s and, as a result, the ball leaves the bat at 40 m/s in the reverse of its original direction. the ball remains in contact with the bat for 2.0 ms. what is the magnitude of the average force exerted by the bat on the ball?