Every red dwarf star that ever joined the main sequence is still there today
Indicate whether the statement is true or false
TRUE
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Test the K+ and a Cl– interionic potential that you developed for Problem 2.25 by determining the equilibrium interionic separation, and comparing this value to the experimental value of 0.266 nm.
What will be an ideal response?
Describe the differences between secular and diffuse reflection
What will be an ideal response?
Dust particles are pulverized rock, which has density 2500 kg/m3. They are approximately spheres 20 ?m in diameter
Treating dust as an ideal gas, what is the root-mean-square speed (thermal speed) of a dust particle at 400°C? (The Boltzmann constant is 1.38 × 10-23 J/K.) A) 5.2 × 10-5 m/s B) 1.7 × 10-5 m/s C) 3.0 × 10-5 m/s D) 7.3 × 10-5 m/s
A man in a gym is holding an 8.0-kg object at arm's length, a distance of 0.55 m from his shoulder joint. What is the torque about his shoulder joint due to the object if his arm is horizontal?
A) 0.24 N ? m B) 4.4 N ? m C) 43 N ? m D) 15 N ? m E) 0 N ? m