Only a fraction of the electrical energy supplied to a tungsten light bulb is converted to visible light. the rest of the energy shows up as infrared radiation (i. e., heat). a 75-w light bulb converts 15.0% of the energy supplied to it into visible light. assuming a wavelength of 550 nm, how many photons are emitted by the light bulb per second? (recall 1 w = 1 j/s)

Asubject in a clinical research trial experiences a serious, unanticipated adverse drug experience. how should the investigator proceed, with respect to the irb, after the discovery of the adverse event occurrence? a. do not report the adverse drug experience to the irb since it is a common adverse experience.b. report the adverse drug experience to the irb only if there are several other occurrences.c. report the adverse drug experience as part of the continuing review report.d. report the adverse drug experience in a timely manner, in keeping with the irb's policies and procedures, using the forms or the mechanism provided by the irb.

The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space.b. we'll know it immediately because it will be brighter than the full moon in the sky.c. we won't know about it until 600 years from now.d. none of the above.

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?