Which of the following tasks should be performed before measuring the mass of any object on a triple-beam balance? a. make sure that all the counterweights are set to zero. b. make sure that the balance is on a level surface. c. make sure that the balance pan is clean and free of debris. d. all of these

Melissa is interested in her family tree and how her family has changed over its many generations. melissa probably more closely resembles

Select all of the methods through which a drug can enter your body. injection swallowing inhalation absorption

The ozone molecule o3 has a permanent dipole moment of 1.8×10−30 cm. although the molecule is very slightly bent-which is why it has a dipole moment-it can be modeled as a uniform rod of length 2.5×10−10 m with the dipole moment perpendicular to the axis of the rod. suppose an ozone molecule is in a 8000 n/c uniform electric field. in equilibrium, the dipole moment is aligned with the electric field. but if the molecule is rotated by a small angle and released, it will oscillate back and forth in simple harmonic motion. what is the frequency f of oscillation?