After the dropped box hits the floor, its kinetic energy is converted into ____________
Fill in the blank(s) with correct word
internal energy
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Lens-Maker Formula: The figure (which is exaggerated somewhat for clarity) illustrates a thin lens. This lens is made of a material with an index of refraction of 1.48, and has radii of magnitudes 6.0 cm and 4.0 cm. What is the focal length of the lens?
A. +25 m B. -5.0 cm C. -4.0 m D. +5.0 m E. -25 cm
In general, Population I stars are ________ than Population II stars.
A. the same age B. younger C. older D. sometimes older, and sometimes younger
Characteristic x-rays can be produced by bombarding targets with electrons. These x-rays occur when
a. electrons from higher shells fill the vacant lower shell b. electrons fill the vacant valence shell c. photons are emitted with energies on the order of 103 eV d. photons are emitted with wavelengths on the order of 103 nm
A heat engine absorbs 85.6 kJ of heat each cycle and exhausts 61.8 kJ
(a) What is the efficiency of the engine? (b) How much work does it do each cycle?