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A simple model considers a continent as a block (density ? 2800 kg/m3) floating in the mantle rock around it (density ? 3300 kg/m3). Assuming the continent is 31 km thick, estimate the height of the continent above the surrounding mantle rock.
A charged paint is spread in a very thin uniform layer over the surface of a plastic sphere of diameter 14.0cm, Find the electric field just inside the paint layer
suppose that both cars start at the same point, how much sooner does the faster car arrive at a destination 35 km away.
Consider three resistors with unequal resistances connected in series to a battery. Which of the following statements are true? 1. The current flowing through each of the resistors is the same and is equal to the current supplied by the battery.
Given a capacitor whose plates measure 15cm by 3.7 cm and are separated by a 2.2mm air gap. Calculate he maximum amount of energy which can be stored in the capacitor under these conditions
The electric charge of a proton is distributed over a volume. The distribution of the proton can be approximated by the exponential equation rho = e/(8*pi*b)exp(-r/b). r is the radial position inside the proton and b equals .23 * 10^-15 m. Find th..
A 2.80 kg gold bar at 98 degrees celcius is dropped into 0.34 kg of water at 23 degree celcius. what is the final temperature? assume the specific heatof gold is 129 J/kg
(a) Calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 12.0 g. Silver has 47 electrons per atom, and its molar mass is 107.87 g/mole. (b) Imagine adding electrons to the pin until the negative charge h..
Consider two vectors where F_1= 84 N, F_2 = 46 N, theta_1= 5 degrees, and theta_2 = 144 degrees, measured from the positive x axis with the counter-clockwise angular direction as positive. What is the magnitude of the resultant vector F = F_1 + F_..
What is the electric field strength between the disks. What is the speed of the box at the end of the 5.7-s interval.
A homogeneous disk of radius R and mass M rolls without slipping on a horizontal surface and is attracted to a point a distance d below the plane. find the frequency of oscillations around the position of equilibrium
At high noon, the Sun delivers 1.10-kW to each square meter of a blacktop road. If the hot asphalt loses energy only by radiation, what is its equilibrium temperature.
how far is this point horizontally from the end of the ramp.
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