B.absorb neutrons to prevent chain reactions which become uncontrollable
Answer:
I think the answer might be A
Explanation:
because if its called Pillars creation then something important might be being born maybe
1. For the first one if it doesn't shatter then it is hard.
2. We sould consider that room temperature is usuall<span>y from 18°C (64°F) to 23°C (73°F) and since the melting point of the substance is 40˚C the substance is liquid, because is melting point not an evaporation point it just melts from solid to liquid.
3. Well, in this one we have to consider that a chemical change it change the thing completely. So in this case is baking a cake because the products make the cake stop being them self and created something else.
4. It tends to have low reactivity. This is because viscosity means something like honey very sticky<span> ,</span> density is how hard it is and lastly the conductivity I would believe is to pass electricity or current.
5. It is a physical change because the evaporated water transforms again into water and then fall as rain, snow or ice.
Hope it helped <3</span>
The speed of sound in normal air is approximately
. In helium, instead, it is
. The mixture of gases mentioned in the problem is made of 97 % of helium and 3% of normal air, therefore the speed of sound in this mixture will be
So, the ratio between the speed of sound in this mixture of gases and in normal air is
The frequencies of the formants of the diver's voices are proportional to the speed of sound, therefore they will change by the same proportion as the speed of sound does. So, the frequencies will be 2.76 times higher than in normal air.
Answer:
c. equal to 760 mm
Explanation:
We are told that another mercury barometer is used that has a tube of larger diameter. This means a larger area and the weight of the liquid in the tube will have increased since volume = area × height. Also, due to the larger area, the net upward force
on the mercury will have also increased by the
same amount because force = area × pressure. Therefore, as long as the pressure remains the same, the height of
the mercury will also remain the same.
Thus the height of the mercury = 760 mm
