After a large snowstorm, you shovel 2,500 kilograms of snow off of your sidewalk in half an hour. you lift the shovel to an average height of 1.5 meters while you are piling the snow in your yard.
a. how much work did you do? hint: the force is the weight of the snow.
b. what was your power in watts? hint: you must always convert time to seconds when calculating power.

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?

Water is siphoned from a large tank and discharges into the atmosphere through a 50-mm diameter tube. the end of the tube is b = 2.6 m below the tank bottom which is a = 6.7 m deep, and viscous effects are negligible. determine the maximum height h over which the water can be siphoned without cavitation occurring. atmospheric pressure is 101.4 kpa, and the water vapor pressure is 1.79 kpa (absolute). report your answer in meters to two decimal places.

Which is the most accurate name for the covalent compound p2o3?