Calculate the magnitude of the electric field at the center
In a laboratory experiment, nine equal negative point charges are placed symmetrically around the circumference of a circle of radius r. Calculate the magnitude of the electric field at the center of the circle.
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The roller-coaster car shown in Fig. 6-41 (h1 = 30 m, h2 = 15 m, h3 = 30 m), is dragged up to point 1 where it is released from rest. Assuming no friction, calculate the speed at points 2, 3, and 4.1
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When identical amounts of heat are supplied to each, the glass bar reaches a temperature of 92 °C, while the other bar reaches 268.0 °C. What is the specific heat capacity of the other substance?
A Cessna aircraft has a lift-off speed of 137 km/h. What minimum constant acceleration does this require if the aircraft is to be airborne after a take-off run of 219 m?
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