Physics, 12.03.2020 18:52 michaelmorrison37
A proton moves perpendicular to a uniform magnetic field B with arrow at a speed of 1.40 107 m/s and experiences an acceleration of 1.80 1013 m/s2 in the positive x-direction when its velocity is in the positive z-direction. Determine the magnitude and direction of the field.
Answers: 2
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Two forces produce equal torques on a door about the door hinge. the first force is applied at the midpoint of the door; the second force is applied at the doorknob. both forces are applied perpendicular to the door. which force has a greater magnitude?
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Smallest intensity of a stimulus that you can detect 50 percent of the time is
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The heater element of a 120 v toaster is a 5.4 m length of nichrome wire, whose diameter is 0.48 mm. the resistivity of nichrome at the operating temperature of the toaster is 1.3 Ć 10-6 ĻĀ·m. the toaster is operated at a voltage of 120 v. (a) what is the power drawn by the toaster? (b) if the cost of electricity is 12 Ā¢ per kilowatt-hour, and it takes 2 minutes to toast bread, how much does it cost for toasted bread? (c) when the heater element is at room temperature, is the resistivity in the nichrome wire greater than, less than, or equal to itās resistivity when at operating temperature? explain.
Answers: 3
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