Answer:
5 cm³.
Explanation:
The following data were obtained from the question:
Volume of water = 35 mL
Volume of water + Rock = 40 mL
Volume of rock =.?
The volume of the rock can be obtained as follow:
Volume of rock = (Volume of water + Rock) – (Volume of water)
Volume of rock = 40 – 35
Volume of rock = 5 mL
Finally, we shall convert 5 mL to cm³. This can be obtained as illustrated below:
1 mL = 1 cm³
Therefore,
5 mL = 5 cm³
Thus, the volume of the rock is 5 cm³.
Answer:
6. solar eclipsis
7. drive less fuel efficient vehicles
Explanation:
these are the only questions i get but i still hope this helps :)
Density = mass/volume = 316/22.5 = 14.045g/mL.
For a radioactive isotope has an activity of 9.60 mCi. , the half-life of the isotope is mathematically given as
t0.5 = 23893 s
<h3>What is the half-life of the isotope?</h3>
Generally, the equation for the half-life is mathematically given as
t0.5=T*0.693
Where
A = A0 e^(-t/T)
t/T = lnA0/A
3.75 hours/T=ln 9.60/7.39
T = 34478.5 s
Therefore
t1/2 = TX0.693
t0.5 = 23893 s
In conclusion, the half life
t0.5 = 23893 s
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