The closer the observer comes to the event horizon, the slower his watch will appear to run to a distant observer
Indicate whether the statement is true or false
TRUE
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The shortest wavelength of visible light is approximately 400 nm. Express this wavelength in centimeters
A) 4 × 10-5 cm B) 4 × 10-7 cm C) 4 × 10-9 cm D) 4 × 10-11 cm E) 400 × 10-11 cm
When we say charge is conserved, we mean that charge can
A. be saved, like money in a bank B. take equivalent forms C. be created or destroyed, as in nuclear reactions D. only be transferred from one place to another
A careful photographic survey of Jupiter's moon Io by the spacecraft Voyager 1 showed active volcanoes spewing liquid sulfur to heights of 70 km above the surface of this moon. If the value of g on Io is 2.0 m/s2, estimate the speed with which the liquid sulfur left the volcano
a. 260 m/s b. 530 m/s c. 790 m/s d. 970 m/s
Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t. The quantity Fd is
a. the kinetic energy of the crate b. the potential energy of the crate c. the linear momentum of the crate d. the work you do on the crate e. the power you supply to the crate