Physics, 23.06.2019 21:10 michaelowenmccollum
A50.0 mg sample of an unknown radioactive substance was placed in storage and its mass measured periodically. after 19.7 days, the amount of radioactive substance had decreased to 3.13 mg. what is the half-life of the unknown radioactive substance?
Answers: 1
Physics, 22.06.2019 18:20, tylersabin72
Object a has a length of 3 cm, a width of 2 cm, and a height of 4 cm. object b is dropped into a graduated cylinder. it displaces 19 ml of water. the volume of object a is: a: greater than the volume of object b b: less than the volume of object b c: equal to the volume of object b
Answers: 2
Physics, 22.06.2019 18:30, zoelynn9104
Examples of states of consciousness include a. daydreaming b. dreaming during sleep c. hypnosis d. all of the above
Answers: 2
Physics, 23.06.2019 00:30, gamallopatty
What is the coldest temperature ever recorded in san antonio?
Answers: 1
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