Answer:
When a car stops suddenly, the inertia the keeps you moving forward will finally stop and give you whiplash, which could seriously injure or even kill a baby. With the seat turned back, the force will be decreased dramatically, and prevent any fatal harm.
Answer: B) Zinc will act as Anode
Explanation:
Standard reduction potential of zinc and nickel are:
Here Zinc undergoes oxidation by loss of electrons, thus act as anode as it has more negative reduction potential.
Nickel undergoes reduction by gain of electrons and thus act as cathode. as it has less negative reduction potential.
Where both
are standard reduction potentials.
As the emf is positive, the reaction is spontaneous and reaction will occur.
Thus Zinc will act as anode.
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Here coffee is filled into a glass cup and when it is heated expansion of coffee as well as glass occurs
we will find the change in volume of glass cup and change in the volume of coffee.
volume expansion is calculated by

for pyrex glass we have

now by the formula


Now for the expansion of coffee

now the expansion of coffee will be


now the coffee that will spill out of the cup will be


so 9.15 mL coffee will spill out of the cup