X-ray bursters are similar to novae, except the collapsed star is a neutron star, not a white dwarf
Indicate whether the statement is true or false
TRUE
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Aberration: Spherical lenses suffer from
A. both spherical and chromatic aberration. B. spherical aberration, but not chromatic aberration. C. chromatic aberration, but not spherical aberration. D. neither spherical nor chromatic aberration.
A force of 30N stretches a very light ideal spring 0.73m from equilibrium. What is the force constant (spring constant) of the spring?
A) 34 N/m B) 41 N/m C) 46 N/m D) 22 N/m
An object is placed 100 cm in front of a lens of focal length 50 cm. A lens of focal length -20 cm is placed 90 cm beyond the first lens. The final image is located
A) 10 cm in front of the second lens. B) 20 cm past the second lens. C) 17 cm past the second lens. D) 10 cm past the second lens. E) 20 cm in front of the second lens.
Mean Life: Isotope A has a decay constant of 0.861 s-1 and isotope B has a decay constant of 0.627 s-1. Which isotope has a longer mean life (time constant)?
A. isotope A B. isotope B