Answer:
The unit is usually seconds. But it really depends on the situation you are in. If you are talking about uranium-238, then you'll be talking about a half life in the billions of years. However, if you are talking about the half-life of a muon, then it'll be in seconds or microseconds.
You have to attach something if your using a picture there is no problems there
<span>Let equation A be
h=ut+<span>12</span>g<span>t2 </span></span>
for 1st stone:
<span>h=<span>12</span> g<span>t2
</span></span>eq.-(A)
for 2nd stone:
<span>h=32m/s(t−1.6s)+<span>12</span>g(t−1.6s<span>)2
</span></span><span>h=32m/s∗t−51.5m+<span>12</span>g<span>t2</span>+12.544m−15.68m/s∗t
</span>
<span>h=16.32m/s∗t+h−38.656m
</span>
<span>t=2.3686s
</span>
now putting the value of t in eqn. A
<span><span>h=27.49m</span></span>
Given:
Water, 2 kilograms
T1 = 20 degrees Celsius, T2 = 100
degrees Celsius.
Required:
Heat produced
Solution:
Q (heat) = nRT = nR(T2 = T1)
Q (heat) = 2 kilograms (4.184 kiloJoules
per kilogram Celsius) (100 degrees Celsius – 20 degrees Celsius)
<u>Q (heat) = 669.42 Joules
</u>This is the amount of heat
produced in boiling 2 kg of water.
