A model rocket accelerates upward from the ground with a constant acceleration, reaching a height of 50 m in 8 s. What is the speed (in m/s) at a height of 50 m?A: 1.07×101 B: 1.25×101 C: 1.46×101 D: 1.71×101 E: 2.00×101

The  value is  

Explanation:

From the question we are told that

    The  height is  

    The  time taken is  

From the equation of motion we have  that

Here u = 0  because the rocket started at rest

=>  

=>    

Also from the kinematic equation we have that

=>  

=>  

1 - wave length

2 - amplitude

3 - crest

4 - trough

explanation:

duh.

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.