Which of the following statements is true about a shopping cart that is moving down the grocery aisle, with a constant velocity, to get ice cream in the freezer section? A. If the shopping cart is moving at a constant velocity, there must be no forces at all acting on the shopping cart
B. The shopping cart must have a force acting on it larger than the shopping cart’s weight to keep moving at a constant velocity
C. There must be an unbalance net force acting on the shopping cart to keep it moving at a constant velocity
D. If the shopping cart is moving at a constant velocity, then there must be a total FNET of zero.

false

explanation:

boats, things on boats luggage are way more heavy then water.

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.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2