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One way to decrease your use of fossil fuels is to heat your water via solar radiation. A solar water heater runs cold water through dark, radiation absorbing tubing. Systems can be as simple as using black PVC pipe on your roof. Assume one such system absorbs at a 45% efficiency in a location where average solar-energy hitting the solar panels is 210 W/m2. The water begins at a temperature of 16.0 °C and needs to be heated to 61.0 °C. If the area of the solar panels is 32.0 m2, what volume of water can be heated in one hour?
Two converging lenses, each of focal length 14.5 cm, are placed 59.2 cm apart, and an object is placed 27.4 cm in front of the first. Where is the final image relative to the second lens formed
When two identical ions are separated by a distance of 8.3×10?10m , the electrostatic force each exerts on the other is 5.4×10?9N How many electrons are missing from each ion
A 4 kg block rest against one end of a horizontal spring which is compressed by 20 cm. Calculate the constant of kinetic friction Mk between the block and the table
A prism has a vertex angle of 60° and an index of refraction of 1.52. What is the minimum angle of incidence, measured away from the vertex
Calculate the index of refraction for a piece of glass that is 3.5 cm thick if the ray inside the glassmakes an angle of 25.4 degree with respect to the normal
A hot air balloon is rising upward with a constant speed of 10 m/s. When the balloon is 4 m above the ground, What is its speed just before it hits the ground
if cin cb 1 - e-0.12t calculate the outflow concentration of a conservative substance no reaction for a single
A baseball player hits a ball towards the outfield with an initial velocity of 76.0 m/s at an angle of 45 relative to the ground. The outfield is 118 m away and is 4.0 m tall.
The surface pressure on Venus is 92.00 atm, and the acceleration due to gravity there is 0.894 g. What force does the Venusian atmosphere exert on the outside surface of the bottom of the tank
At what distance along the central axis of a ring of radius R = 0.100 m and uniform charge is the magnitude of the electric field due to the ring's charge maximum
An unbanked circular highway curve on level ground makes aturn of 90 degrees. What is the minimum length of the curve in miles
A box with a mass of 5 kg is lifted (without acceleration) through a height of 2 m to place it upon the shelf of a closet. What is the increase in potential energy of the box
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