A student is measuring the circumferences of pine trees for an experiment. She measures 50 trees using a ruler that measures to the nearest centimeter.
Which statement describes a change that could help improve the results of
her experiment?

True or false when elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it.

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?

In the circuit, the switch s has been open for a long time and r = 125 kohm. it is then suddenly closed. (a) determine the time constant before the switch is closed. s (b) determine the time constant after the switch is closed. _ s (c) let the switch be closed at t = 0. find the current in the switch as a function of time. (use t for time. express your answer in milliamps and seconds.) i(t) =_