All radio telescopes are reflectors in design
Indicate whether the statement is true or false
TRUE
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The continuing rise of carbon dioxide concentration in our troposphere is leading to worldwide cooling as dry ice forms at the poles
Indicate whether the statement is true or false
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
Usually one can touch the terminals of a battery (e.g., 1.5 volts) with no dire consequences
Why do hospital intensive care rooms go to great effort and expense to attach "ground wires" to equipment in order to guard against the presence of low potentials? (i.e., why are low voltages hazardous in hospitals?)
The heat capacity at constant volume of an ideal gas depends on:
A. the temperature B. the pressure C. the volume D. the number of molecules E. none of the above