Which of the following objects is accelerating?
- a car moving at a constant speed in a straight line
- a car moving at a constant speed through a curve
- a flower pot falling from a 2nd story window
- a patriotic statue in center of the park

Answer : The correct options are, (b) and (c)

Explanation :

Acceleration can be defined as the rate change of velocity. It is a vector quantity. when either the speed or direction or both changes for a body, it is said to accelerate.

In option a, a car is moving with constant speed in a single direction. Hence, it is not accelerating.

In option b, through car is moving with constant speed but it is moving on a curved path which means its direction is changing. Hence, it is accelerating.

In option c, the flower pot is falling through second story. It is falling under gravity. it is accelerating due to gravity.

In option d, statue in center of park is at rest. Hence, it is not accelerating.  

Thus, correct options are b and c.

answer: the exterior temperature of commercial jet planes as they leave the stratosphere and return to the ground increases steadily.

explanation:

the lower most layer of atmosphere is troposphere which extends from 0 to 12 km above the surface of the earth. the temperature initially decreases as distance is increased from the earth's surface. commercial jets fly in lower part of the stratosphere. the stratosphere extends upto 50 km. the temperature in stratosphere starts rising again due to presence of ozone which traps the uv rays.

thus, when the planes leave the stratosphere and return to the ground, the exterior temperature increases steadily.

the answer would most likely be c, because if it's a comical piece of information, it may likely not be true, if it's a site that allows anybody to edit the content, it could mean a five year old is typing the info, and if it's a tv show produced by a celeb, it may have a biased opinion.