Which of the following can a hospital do to reduce the spred of infectious diseases?
a. have patients wash often using antibacterial soap
b. keep infected patients confined, and limit visitors
c. serve food to patients confined in paper towels, and dispose of waste in the trash
d. do not allow cleaning personnel into room occupied by infected patients
d?

Ametal ring 4.20 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpendicular to the magnetic field. these magnets produce an initial uniform field of 1.12 t between them but are gradually pulled apart, causing this field to remain uniform but decrease steadily at 0.240 t/s . (a) what is the magnitude of the electric field induced in the ring? (b) in which direction (clockwise or counterclockwise) does the current flow as viewed by someone on the south pole of the magnet?

This is the number of complete movements of a wave per second.

Select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air