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The current through a lamp connected across 120 V is 0.48 A. the resistance when the lamp is on is 250 ohm When the lamp is cold, the resistance is one fifth as large as when the lamp is hot 50. What is the current through the cold lamp as it is turned on if it is connected to a potential of 120 V?
the specific heat of aluminum is .215 calories per gram per degree celcius. calculate the amount of heath required to raise the temperature
The desperate contestants on a TV survival show are very hungry. The only food they can see is some fruit hanging on a branch high in a tree. With what speed does the rock leave the spring
A space vehicle is coasting at a constant velocity of 15.1 m/s in the +y direction relative to a space station. find the direction of the vehicle's velocity relative to the space station
This seemed pretty straight foward but i get a bad anwser. In the solutions for this problem they just took the diameters, What is the speed in the second segmen
A fun-loving 10.1kg otter slides up a hill and then back down to the same place. how much mechanical energy did she lose on the hill
The wings on a stonefly do not flap, and thus the insect cannot fly. However, when the insect is on a water surface, What is the ratio of the sailing speed vs to the average non-sailing speed vns
A 210 g piece of ice at 0°C is placed in 410 g of water at 22°C. The system is in a container of negligible heat capacity and is insulated from its surroundings. How much of the ice melts
A specimen of oil having an initial volume of 620 cm^3 is subjected to a pressure increase of 3.6 MPa, What is the compressibility of the material
If you are in a car accident with an initial speed of 119 km/h and you are stopped by an airbag that inflates from the dashboard, over what distance should the airbag stop you for you to survive the crash.
A particle moves with constant acceleration a . The expression vi+at represents the particle's velocity at what instant in time? Here are the choices.
An electron is released from rest at the negative plate of a parallel plate capacitor. The charge per unit area on each plate is ? = 1.81 10-7 C/m2, and the plates are separated by a distance of 1.38 10-2 m. How fast is the electron moving just be..
The world record for a high jump from a standing position is 1.90 m. With what speed must a jumper leave the ground to the attain this height
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