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A Styrofoam box has a surface area of 0.85 m2 and a wall thickness of 2.0 cm. The temperature of the inner surface is 5.0°C, and the outside temperature is 25°C. If it takes 8.3 h for 5.0 kg of ice to melt in the container, determine the thermal conductivity of the Styrofoam.
W/m · K
Two identical positive charges exert a repulsive force of 7.4 x10-9 N when separated by a distance of 4.8 10-10 m. compute the charge of each.
Find the net downward force on the tank's flat bottom, of area 1.60 m^2, exerted by water and air inside the tank and air outside the tank.
If the shot is made from a horizontal distance of 5.10m and must be accurate to plus/minus 0.23m (horizontally) what is the range of initial speeds allowed to make a basket
Find out the tension in the two strings. string between m1 and m2 2 N string between m2 and the 3.00 kg mass
You are driving north on 107th Avenue at a speed of 32.3 mph. A police car whose siren produces a sound at a frequency of 513 Hz is approaching from the opposite direction at a speed of 61 mph, At what frequency do you year the siren
Concrete is pumped from a cement mixer to the place it is being laid, instead of being carried in wheelbarrows. What is the viscosity of the concrete, assuming the flow is laminar
What is the maximum positive potential energy. Write down an expression for U as a function of x, with U in joules and x in meters.
A 1.0-cm-tall object is 7.5 cm in front of a diverging lens that has a 10 cm focal length. Determine the image height by making measurements on your diagram
After landing on an unfamiliar planet, a space explorer constructs a simple pendulum of length 46.0cm, What is the magnitude of the gravitational acceleration on this planet
A 1.5 mm-diameter, 40 cm -long copper wire carries a 4.5 A current. What is the potential difference between the ends of the wire
To avoid hitting a pedestrian, a car driver slams on her brakes and comes to a complete stop after skidding 16 m. find the speed of the car when the brakes were applied
While at the county fair, you decide to ride the Ferris wheel. Having eaten too many candy apples and elephant ears, you find the motion somewhat unpleasant. What is the magnitude of your acceleration
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