Imagine a 15kg block moving with a speed of 20m/s. Calculate the kinetic energy of this block.
1 answer:
The kinetic energy formula is;
The variable represents the mass. Its unit is kilogram. We are informed that the mass of the object is
. The variable
represents the linear velocity. Its unit is meter per second. We are informed that the linear velocity of the object is
. Let's find the kinetic energy of the object by substituting these values in the formula.
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Answer: D. The number of molecules having Er or greater doubles.
Explanation: As the temperature increases from 20°C to 30°C, the number of molecules with maximum energy decreases, but the number of effective collisions which result into the formation of product doubles.
This is due to doubling of molecules which possess energy equal to or greater than which means now double number of molecules will be able to cross the energy barrier and hence the formation of product increases and hence the rate increases to double.