An unknown substance turns methyl orange solution red. This shows that the substance
2 answers:
Answer: is acidic in nature
Explanation:
Acid base indicators are usually weak acids or weak bases. They change their color in the solution with change in the pH.
For any indicator say HIn , the dissociation can be shown as:
Methyl orange is one such indicator which shows red color in acidic medium and yellow color in basic medium.
Thus as the color of the methyl orange has turned red, the solution must be acidic in nature.
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Answer:
Velocity, u = 14.7 m/s
Explanation:
It is given that, a driver can probably survive an acceleration of 50 g that lasts for less than 30 ms, but in a crash with a 50 g acceleration lasting longer than 30 ms, a driver is unlikely to survive.
Let v is the highest speed that the car could have had such that the driver survived. Using a = -50 g and t = 30 ms
Using first equation of kinematics as :
In case of crash the final speed of the driver is, v = 0
u = 14.7 m/s
So, the highest speed that the car could have had such that the driver survived is 14.7 m/s. Hence, this is the required solution.