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Question: A Styrofoam box has a surface area of 0.81 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 7.3 h for 5.0 kg of ice to melt in the container, determine the thermal conductivity of the Styrofoam.
q1. a 238 g particle is released from rest at point a inside a smooth hemispherical bowl of radius 32.5 cm.compute the
On The Apollo 14 mission to the Moon, astronaut Alan shepard hit a golf ball with a 6 iron. For how much more time was the ball in flight
A large pot is placed on a stove and 1.2 kg of water at 14°C is added to the pot. The temperature of the water is raised evenly to 100°C just before it starts to boil. What amount of heat is absorbed by the water in reaching 100°C
An semicircular arc with a radius of B is split into two. The arc is in the xy-plane such one part is in the first quadrant, What is the electric field vector at the origin
A spring with an unstrained length of 0.071 m and a spring constant of 1.5 N/m hangs vertically downward from the ceiling. What is the magnitude of the external electric field
The radius of the Earth's orbit is 1.50 multiply.gif 1011 m and that of Mercury is 5.81 multiply.gif 1010 m. What is the orbital period of this planet
The pilot of an airplane executes a loop-the-loop maneuver in a vertical circle. What is the pilot's apparent weight at the lowest point if his true weight is 160 lb
A construction worker uses a steel tape to measure the length of an aluminum support column. what is the measured length when the temperature rises to 29.4°C
A player uses a hockey stick to increase the speed of a0.200kg hockey puck by 6 m/s in 2 seconds. How much did the hockey puck accelerate
light ray is incident normally to the long face (the hypotenuse) of a 45° -45° -90° prism surrounded by air, Calculate the minimum index of refraction of the prism
A small block is released from rest at the top of a frictionless incline. The block travels a distance 0.263 m in the first second after it is released
A proton (mass 1 u) moving at 5.40 *10^6m/s collides elastically and head-on with a second particle moving in the opposite direction at 2.60 106 m/s. Find the mass and final velocity of the second particle
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