610.864 Energy result in kilojoules:
GROUNDWATER is the term used for water that soak into the ground, fills the openings in the soil and trickles into cracks and spaces in rock layers.
Groundwater is usually found underneath the earth surface in the spaces and cracks in sand, rock and soil. It is stored in aquifers. Ground water usually connect with various water bodies such as oceans, rivers and streams and it is always a natural source of water for vegetation. Ground water is a very important natural resource.
Answer:
I would say B all of these
<u>Answer:</u> The volume of the gas when the pressure and temperature has changed is
<u>Explanation:</u>
To calculate the volume when temperature and pressure has changed, we use the equation given by combined gas law.
The equation follows:
where,
are the initial pressure, volume and temperature of the gas
are the final pressure, volume and temperature of the gas
We are given:
Putting values in above equation, we get:
Hence, the volume of the gas when the pressure and temperature has changed is
Answer : The correct option is, (2) 0.5 grams
Solution : Given,
As we know that the radioactive decays follow first order kinetics.
First we have to calculate the half life of Americium-241.
Formula used :
Putting value of half-life in this formula, we get the rate constant.
The expression for rate law for first order kinetics is given by :
where,
k = rate constant =
t = time taken for decay process = 432 years
a = initial amount of the Americium-241 = 1 g
a - x = amount left after decay process = ?
Putting values in above equation, we get
Therefore, the amount remain in 432 years will be, 0.5 grams