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Five identical quintuplets leave earth when they reach the age of 21, in the year 2121. Each quintuplet goes on a spaceship journey that takes T years, as measured by a clock in each spaceship. During the journey they travel at a constant speed v, as measured on earth, except during the relatively short acceleration phases of their journey. Rank these quintuplets on the basis of the year on Earth when they return from their journey. A. T=10 years, v=0.8c B. T=20 years, v=0.4c C. T=10 years, v=0.4c D. T=5 years, v=0.2c E. T=20 years, v=0.8c

An alien spacecraft is flying overhead at a great distance as you stand in your backyard. You see its searchlight blink on for 0.150s. The first officer on the spacecraft measures that the searchlight is on for 22.0ms. Which of these two measurements is the proper time?.

Suppose the 1.96m tall astronaut now gets up and stands with his body perpendicular to the direction of motion.  What would the observer on Earth now measure for his height?

Discuss how the sea breeze is generated in a baroclinic coastal environment.

Match the following to their correct terms and numbers. You may use answers more than once, some answers may seem correct but there is a better answer that fits.  Choose wisely

Algae  and bacteria are grouped into different domains because….  Give your choice and explain why  Algae eat bacteria         Algae are photosynthetic Bacteria are not made of cells Bacterial cells lack a nucleus Algae are not made of cells

What is the momentum of this baseball?  Express your answer in kg m/s. 

Two protons (each with rest mass

What is the initial kinetic energy of each proton, in the previous question? Express your answer in MeV.  

A patient receiving epinephrine for anaphylaxis has an IV site that appears swollen and pale. What is the nurse’s priority action?