If the line is going up then it’s driving towards
If the line is going horizontal it’s at rest
If the line is going down it’s going backwards
Answer:
It will take 6.6 hours for 75% of the lead to decay.
Explanation:
The radioactive decay follows first order rate law
The half life and rate constant are related as

The rate law for first order reaction is
![time=\frac{1}{k}(ln[\frac{A_{0}}{A_{t}}]](https://tex.z-dn.net/?f=time%3D%5Cfrac%7B1%7D%7Bk%7D%28ln%5B%5Cfrac%7BA_%7B0%7D%7D%7BA_%7Bt%7D%7D%5D)
Where
A0 = initial concentration = 1 g
At= final concentration = 0.25 g (as 75% undergoes decay so 25% left]

Could’ve reacted with water as alkali metals are very reactive to water.
Answer:
FALSE!!! Thermal energy can be transformed to heat.
Explanation:
Answer:
1= wash your hands
2 Eat a diet high in fruits and vegetables.
3 Exercise regularly.
4 Maintain a healthy weight..
5 Get adequate sleep.
6 Take steps to avoid infection, such as washing your hands frequently and cooking meats thoroughly.
Explanation: