Each BB 0.349 grams and 5.386 grains. 349 mg & 5.386 grains each steel BBs.
I think there was momentum conserved
Explanation: I took the test
Answer:
the answer is
Explanation:For equilibrium
Weight = Tension
mg=T
∴T=4×3.1π=12.4πN (as can be inferred from the question)
Y=
△l/l
T/A
=
1000
0.031
/20
12.4π/π(
1000
2
)
2
=
4×0.031
12.4×20×1000×(1000)
2
=2×10
12
N/m
2
Answer:
The half-life of a radioactive isotope is the time such that the initial amount of the isotope is reduced to its half.
Thus, if we start with A grams of a given radioactive isotope, after a 1 half-life, we will have A/2 grams of the radioactive isotope.
In this case, we know that the sample has 110g of a radioactive isotope.
Then, after 1 half-life, we should have half of 110g, which is:
110g/2 = 55g
Then we should have 55 g of a radioactive isotope.
The answer that is closer to this result is option d (50 g), so that is the correct one.
An example of biological weathering is the widening of gaps
in rocks caused by tree roots since pressure or stress is exerted on the
rocks due to the growing plant roots. The pressure is exerted by a biological
process (i.e., growing roots), even though the process is physical.
Plants and animals and its action speeds up mechanical and or
chemical weathering, which in turn causes biological weathering.
<span>With the help of the chemicals
that are produced by the tiniest bacteria, algae and liches, the rocks which they
live in are also broken down by them in order to get the nutrients they need.</span>
