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Cadets vs. Seniors STEM and Aerospace Knowledge Competition

Current results and past questions with answers

This Round competition period will end 31 May, 2014.
SQ45 CAP Credit for winner = $50

CADETS

12

QUESTION

SENIORS

1

C/CMSgt Andrew J Saba

Science Question 4. Posted 21 Mar - Removed 26 Mar @ 1920

On Airman Basics page.

When an increase in speed doubles the kinetic energy of a moving body, its momentum

A. increases, but less than doubles.
B. doubles.
C. more than doubles.
D. depends on factors not stated.

Other choices don’t properly distinguish between the linear speed dependence of momentum and the squaring of speed for Kinetic Energy. Or momentum is given by (p)momentum=(m)mass*(v)velocity, while (K)kinetic energy is given by K=1/2*mv^2. You can see that doubling velocity would double momentum, while it would multiply kinetic energy by four. So to double kinetic energy, momentum would be increased, but not quite doubled.

 

C/CMSgt Andrew J Saba

C/CMSgt Gunnar J Gobel

C/Amn Eli R Patrick

Science Question 3. Posted 12 Mar - Removed 21 Mar @ 1010

On Forms page

The fact that the Moon always shows its same face to Earth is evidence that the Moon rotates about its axis about once per

A. day.
B. month.
C. year.
D. None of these, for the moon does not rotate about an axis
.

Choice D highlights a common misconception.

 

C/Amn Eli R Patrick

C/SrA Brooke L Thomas

C/CMSgt Andrew J Saba

C/CMSgt Gunnar J Gobel

Science Question 2. Posted 6 Mar - Removed 12 Mar @ 2103
On ES page.

Science Question 2.
Polarization is a property of

A. transverse waves.
B. longitudinal waves.
C. all waves.
D. None of these.

Polarization distinguishes between transverse and longitudinal waves.

 

C/CMSgt Gunnar J Gobel

C/Amn Eli R Patrick

C/CMSgt Andrew J Saba

C/SrA Brooke L Thomas

Science Question 1. Posted 2 Mar - Removed 6 Mar @ 0640
On Home Page

An inflated balloon with a heavy rock tied to it submerges in water. As the balloon sinks deeper and deeper, the buoyant force acting on it

A. increases.
B. decreases.
C. remains largely unchanged.
D. Need more information.

The balloon is compressed by water pressure—and
compression is greater with greater depth—displacing less water.

1st Lt Sebastian V Domingo

 


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