(i showed the paragraph with the question.)

according to the author, what effect do the cart’s wheels have on most roller coasters?

when the cart reaches the top of the first hill, not only are riders’ stomachs screaming for mercy, but also the cart is at its maximum potential energy. without warning, the energy-loaded cart begins to descend the first hill. as the cart careens down the hill, it has kinetic energy. kinetic energy is different from potential energy. kinetic energy is the energy of motion. all objects in motion have this energy. the kinetic energy propels that cart down the hill. eventually, the cart will fight the forces of gravity and travel up another hill. on this uphill journey, the cart again begins to gain potential energy. the cart switched from potential energy, to kinetic energy, and back again. therefore, a roller coaster ride is just the converting of kinetic energy and potential energy.

a) the wheels cause friction
b) the wheels eliminate friction
c) order of importance
d) comparison and contrast

Read the following passage: sari couldn't believe her bad luck. she had locked her keys in the car. to add fuel to the fire, her cell phone was in the locked car, and she was late for a very important meeting. she knocked on her neighbor's door so that she could ask to use his phone, but he was not not home. what was she to do? what role does the idiom in the passage serve? a. it shows that sari has incredibly bad luck when it comes to work.b. it shows that sari's neighbor was not home either.c. it shows that sari locked her keys in the car.d. it shows that sari's situation was worse than it seemed at first.

Select the correct answer. read this excerpt from incidents in the life of a slave girl by harriet ann jacobs: among the ladies who were acquainted with my grandmother, was one who had known her from childhood, and always been very friendly to her. she had also known my mother and her children, and felt interested for them. at this crisis of affairs she called to see my grandmother, as she not unfrequently did. she observed the sad and troubled expression of her face, and asked if she knew where linda was, and whether she was safe. my grandmother shook her head, without answering. "come, aunt martha," said the kind lady, "tell me all about it. perhaps i can do something to you." which of these important concepts uncommon to abolitionist literature does jacobs depict in the excerpt? 1. some kind white characters were included in slave narratives so that northerners would not be offended. 2. southern society was complex and diverse with both good and bad people unlike northern stereotypes showed. 3. many kind slave owners and their slaves developed deep friendships. 4. most whites and blacks lived in harmony in the south and made efforts to each other. a. 1 and 4 b. 1 and 3 c. 1 and 2 d. 2 and 3

Compare: what are the similarities and differences between "artificial flavors" and "natural flavors"? why does schlosser explain these two terms in such detail?