Answer:
Option B. A tractor–trailer traveling at 80 kph.
Explanation:
Kinetic energy can be defined as the energy possessed by a body in motion. Mathematically, it is expressed as:
K.E = ½mv²
Where:
K.E is the kinetic energy.
m is the mass of the object.
v is the velocity of the object.
From the equation, K.E = ½mv²,
We can say that the kinetic energy (K.E), is directly proportional to both the mass (m) and square of the velocity (v). This implies that the greater the mass of an object, the greater the kinetic energy and the smaller the mass, the smaller the kinetic energy.
Now, considering the options given in question above, it is evident that the tractor–trailer has a greater mass than the car, cheetah and motor cycle. Hence, the tractor–trailer will have a greater kinetic energy even though they are traveling with the same velocity.
In Fisher esterification, sulfuric acid is used as a catalyst and its function is to convert the carboxylic compound in its conjugate acid. This favours the nucleophilic attack of the alcohol. To act as a catalyst you need a strong acid, therefore sulphuric acid is suitable for this kind of reaction.
I belevieve the answer is A
Answer:
ZnCO3 + 2HClO4 = Zn(ClO4)2 + CO2 + H2O
Explanation:
ZnCO3 + 2HClO4 = Zn(ClO4)2 + H2CO3
ZnCO3 + 2HClO4 = Zn(ClO4)2 + CO2 + H2O
The way you would answer this is convert the grams to milligrams (g to mg) that would give you 330,000mg and 250,000mg then subtract them
Remember 1g = 1000mg
