Children slide down a frictionless water slide that ends at a height of 1.80 m above the pool. if a child starts from rest at point a and lands in the water at point b, a horizontal distance l = 2.42 m from the base of the slide, determine the height h of the water slide.

0.813 m

Explanation:

Given

height at which slide ends is h=1.8 m

Horizontal distance L=2.42 m moved by child from slide base to pool

At slide end Child has only horizontal velocity

horizontal velocity is given by

where H=height of slide

time taken by child to complete 1.8 m height

Horizontal distance moved in this time

answer; i believe that the correct answer is (d) a very small amount of mass

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.