slixmaster89
05.05.2020 •
Chemistry
What happened as Leah and Isaac moved down the small slope from point C to D?
A.
Their kinetic energy decreased.
B.
Their kinetic energy changed to potential energy.
C.
Their potential energy increased.
D.
Their potential energy changed to kinetic energy.
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Ответ:
D
Explanation:
As you move down anything, towards the earth, (gravitational) potential energy decreases. This eliminates options B and C.
By the law of conservation of energy, the energy of the system stays the same. However the energy may be converted into different forms. In this case, the potential energy is converted into kinetic energy - this is what makes people move faster as they go down the slope. This makes option A wrong and option D right.
Ответ:
The statement correctly predicting and explaining the chemical reactivity of two metals is given below -Rubidium (Rb) is more reactive than strontium (Sr) because strontium atoms must lose more electrons
Explanation: