Tuesday
June 18, 2013

# Posts by spencer

Total # Posts: 159

physics em
The corroded contacts in a lightbulb socket have 8.20 Omega resistance. How much actual power is dissipated by a 105 W (120 V) lightbulb screwed into this socket?

Physics EM
wow your right i feel stupid. i thought the other resistor added was different. now it makes sense thanks.

Physics EM
An ammeter is connected in series to a battery of voltage V_b and a resistor of unknown resistance R_u The ammeter reads a current I_0. Next, a resistor of unknown resistance R_r is connected in series to the ammeter, and the ammeter's reading drops to I_1. Finally, a seco...

Physics E&M
thanks i normally look at that site but I wasnt thinking capacitors

Physics E&M
A Geiger counter detects radiation such as alpha particles by using the fact that the radiation ionizes the air along its path. A thin wire lies on the axis of a hollow metal cylinder and is insulated from it. View Figure A large potential difference is established between the...

long physics E&M
A Geiger counter detects radiation such as alpha particles by using the fact that the radiation ionizes the air along its path. A thin wire lies on the axis of a hollow metal cylinder and is insulated from it. View Figure A large potential difference is established between the...

Physics E&M
but i think when hey are closest their velocities are not zero since their masses are different. i tried using conservation of momentum also.

Physics E&M
A proton and an alpha particle ( q= + 2e, m=4u ) are fired directly toward each other from far away, each with an initial speed of 0.01 c.What is their distance of closest approach, as measured between their centers?

Physics
a. Since W=mass x acceleration , when accelerating upward the acceleration due to gravity and the acceleration of the elevator add up. So, a=(9.8+1.7)=11.5m/s^2, so weight = 97kg x 11.5 m/s^2. b. at constant speed their is no acceleration except for earths gravity which means ...

Physics E&M
Three electrons form an equilateral triangle 1.00 nm on each side. A proton is at the center of the triangle.What is the potential energy of this group of charges?

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