Read the passage below. it summarizes survey information. the global youth tobacco survey asks youth to fill in the answers to several questions about their tobacco use. in this survey conducted between 2000 and 2007, it was found that in youth ages 13-15, 12 percent of boys and 7 percent of girls reported smoking cigarettes. this information was shared and reported on the american cancer society website. the information was then used by several industries in the fields of health care, insurance, and education. what is a reason that these data may be unreliable? it is information that is too old to be considered factual. it was found on the american cancer society website, and websites are unreliable. it is information that is used for a variety of purposes and not just gathered for research. it is from a self-reporting survey, and teens may not want to answer the questions honestly.

the gas collects in coils that then becomes a liquid that then flows through the coils inside the refrigerator

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.

there are no contact forces mentioned on the list of choices that you've provided.