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The current in an incandescent lamp is 0.5A when connected to a 120-V circuit, and 0.2 A when connected to a 10-V source. Does the resistance of the lamp change in these cases? Explain your answer and defend it with numerical values.
An extension cord made of two wires of diameter 0.129cm (no. 16 copper wire), How much power is dissipated in the cord
the headlights on a certain car are measured to be 1.1 m apart. the diameter of the pupil in a human eye is 2.5 mm.
What is the most probable kinetic energy for a molecule of a gas at temperature T = 300.K
A spaceship of mass 2.3×106 is cruising at a speed of 5.6×106 when the antimatter reactor fails, blowing the ship into three pieces. One section, what is the direction of the third piece
the coefficient of static friction between the floor of a truck and a box resting on it is 0.30. the truck is traveling
A thick, conducting, spherical shell of inner radiusa = 0.7 cm and outer radius b = 1.3 cm is uncharged. The shell surrounds a point charge +Q = 3.10×10-3 C at itscenter (see the figure). What is the surface charge residing on the inner surface oft..
A copper block is removed from a 300°C oven and dropped into 1.00 kg of water at 20.0°C. What is the mass of the copper block
For distant objects, the angular size in degrees can be approximated as 57° (w/d), What is the angular size of the headlights on a car 7 km away if the headlights are 1.6 m apart
A wheel with a radius of 0.25 m rolls without slipping on a level road at a constant speed of 1.1 m/s for 2.0 min
The angular position of a pendulum is represented by the equation ? = 0.0330 cos ?t, Determine the period and length of the pendulum
when high-energy charged particles move through a transparent medium with a speed greater than the speed of light in
A piccolo and a flute can be approximated as cylindrical tubes with both ends open. What is the ratio of the piccolo's length to the flute's length
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