• # Nuc2 Quiz

Posted by Craig Messerman on 12/9/2022

1. Convert your highest radioactivity count from our samples into Becquerels, assuming that exactly one-third of the emitted particles were captured.

2. Why is the Becquerel a less useful measurement in regards to the health effects of radioactivity?

3. How is a Sievert a better unit for radiation exposure?

• # test sound

Posted by Craig Messerman on 10/5/2022
• # Astro 7 Quiz

Posted by Craig Messerman on 2/4/2022

1. What will cause the sun to expand into a red giant as it ages?

2. Why will the sun NOT explode?

3. What is the difference between a neutron star and a black hole?

4. Why are black holes black?

• # 2.4 Projectile quiz

Posted by Craig Messerman on 10/11/2021

1. What is the total time aloft for a projectile that reaches 100.0 meters high?

2. How far will that projectile go if its initial velocity is 44.3 meters per second, 37 degrees above horizontal?

3. Why is 45 degrees the optimum angle for distance of a projectile?

Posted by Craig Messerman on 10/4/2021

1. A skydiver is falling at terminal velocity of 110.0 mph in a southerly wind of 5.0 mph, what is their resultant velocity?

• # 4.1 quiz

Posted by Craig Messerman on 5/4/2021

4.1 Quiz

Calculate the mass of two pith balls on string if a 12 microCoulomb charge on each holds them at an angle of 10 degrees apart on 10.0 cm strings.

• # 3.8 quiz

Posted by Craig Messerman on 2/24/2021

1. If a tuning fork resonates over a double-open-ended tube of L=0.40 m, what is the frequency?

2. Draw the tube and standing wave.

3. What is the wave speed and wavelength of a 0.75 m long guitar string playing a middle-C of 256 Hz?

• # 3.5 quiz

Posted by Craig Messerman on 2/12/2021

Use the ULG and centripetal force to calculate Earth's orbital velocity (speed), and check your answer geometrically.

• # 3.4 Quiz

Posted by Craig Messerman on 2/9/2021

If the average solar irradiance on Earth is 1.36 kW/m^2, what would it be on Pluto at 35 AU from the sun?