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Part A
Approximately how long should it take 9.3 kg of ice at 0âC to melt when it is placed in a carefully sealed Styrofoam ice chest of dimensions 25 cm x 35 cm x 55 cm whose walls are 2.0 cm thick? Assume that the conductivity of Styrofoam is double that of air and that the outside temperature is 35âC.
Express your answer using two significant figures.
A thin, uniformly charged spherical shell has a potential of 646 Volt on its surface. Outside the sphere, at a radial distance of 15 centimeter from this surface, the potential is 438 Volt. Compute what the total charge on the sphere
Ray of light leaves point A and reflects from mirror and travels to point B. Point B is level with bottom of mirror and distance between the two is 30 cm, How far from bottom does the light ray hit the mirror
Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. What is the orbital period of the faster planet, in years
A -10.0 nC point charge and a +20.0 nC point charge are 15.0 cm apart on the x-axis. What is the direction of the electric field at the point on the x-axis, between the charges, where the electric potential is zero
One of your summer lunar space camp activities is to launch a 1190-kg rocket from the surface of the Moon.What gain in gravitational potential energy does the launch accomplish
On a cold day, 26800 Joule of heat leaks out of a house. The inside temperature is 21 °C, and the outside temperature is -24°C. Obtain the increase in entropy of the universe
A small object is attached to a horizontal spring and set in simple harmonic motion with amplitude A and period T. How long does it take for the object to travel a total distance of 6A?
What is the coefficient of static friction between the box and the floor?
A liquid is flowing through a horizontal pipe whose radius is 0.0149 meter. Find what volume flow rate will keep the pressures in the two horizontal pipes the same
An airplane propeller is 2.08 m in length (from tip to tip)with mass 117 kg. The propeller is rotating at 2400 rev/min aboutan axis through its center. What is its rotational kinetic energy
A 100-g aluminum calorimeter contains 250-g of water. Twosubstances are in thermal equilibrium at 10 degrees celcius. Determine the specific heat of the unknown sample
For a particular RLC series circuit, the capacitive reactance is 4.15 ?, the inductive reactance is 47.1 ?, What is the maximum voltage across the circuit
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