Answer:
500 years
Explanation:
The original carbon-14 was 100%, and after 100 years, it decays 1.202%. So after 100 years it goes to 98.798%, after more 100 years (200 years), it will be 97.596% (98.798 - 1.202), thus, after n 100 years "package", the percenatge will be:
100% - actual% = n*1.202
n = (100% - actual%)/1.202
n = (100% - 94%)/1.202
n = 4.992
So, the number of years is n*100 = 4.992*100 = 499.2 ≅ 500 years.
Answer:
60000J
Explanation:
Given parameters:
Mass of car = 1200kg
Speed = 10m/s
Unknown:
Kinetic energy = ?
Solution:
The kinetic energy is given as:
Kinetic energy =
m v²
Now insert the parameters and solve;
m is the mass
v is the velocity
Kinetic energy =
x 1200 x 10² = 60000J
Answer:
The molar mass of the gas is 44.19 g/mol
Explanation:
Amount of sample of gas = m = 13.5 g
Volume occupied by the gas = V = 5.10 L
Pressure of the gas = P = 149.83 KPa
1 KPa = 0.00986 atm
P = 
Assuming M g/mol to be the molar mass of the gas
Assuming the gas is behaving as an ideal gas

The molar mass of gas is 44.19 g/mol
Answer: a) Oak trees grow tallest between temperatures of 10 and 40 degrees
Explanation:
This hypothesis is specific, can be tested (though perhaps not easily), and is well set up.
Hope this helps! :)
Helium is stable compound. exists in gaseous state. the answer is gas