An electric fan has a power output of 60 w. how much work is done if the fan operates for 120 s?
a. 0.5 j
b. 60 j
c. 120 j
d. 7200 j

Apair of 10μf capacitors in a high-power laser are charged to 1.7 kv. a. what charge is stored in each capacitor? b. how much energy is stored in each capacitor?

In a simplified model of the human eye, the aqueous and vitreous humors and the lens all have a refractive index of 1.40, and all the refraction occurs at the cornea, whose vertex is 2.60 cm from the retina. what should be the radius of curvature of the cornea such that the image of an object 40.0 cm from the cornea’s vertex is focused on the retina?

Wavelength of 125 meters is moving at a speed of 10 m/s. what is it's frequency?