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Question - An unknown length of platinum wire 0.760mm in diameter is placed as the unknown resistance in a Wheatstone bridge (see the figure). Arms 1 and 2 have resistance of 38.0Ω and 55.0Ω, respectively. Balance is achieved when R3 is 3.63 Ω. Resistivity of platinum is 10.6 x 10-8.
How long is the platinum wire?
A 0.27-m-thick sheet of ice covers a lake. The air temperature at the ice surface is -10°C. In five minutes, the ice thickens by a small amount. Find the number of millimeters by which the ice thickens
Galileo dropped a ball from the tower of Pisa. The ball hit the ground in 3 seconds. what was the speed on striking the ground
In a new (inelastic) collision, the same two bumper cars with the same initial velocities now latch together as they collide. What is the final speed of the two bumper cars after the collision
On a frictionless table, a glob of clay of mass 0.42 kg strikes a bar of mass 1.98 kg perpendicularly at a point 0.39 m from the center of the bar and sticks to it. At what angular speed does the bar/clay system rotate about its center of mass afte..
A hoop and a disk, both of 0.46- m radius and 2.0- kg mass,are released from the top of an inclined plane 2.8 m high and 7.7 mlong. What is the speed of the hoop
At what speed do a bicycle and its rider, with a combined mass of 100-kg, have the equal momentum as a 1500 kg car travelling at 5 ;{ rm m}/ {rm s}.
A partial with a mass of 2.0 x 10-5kg and a charge of +2.3 micro-coulomb is released in a (parallel plate) uniform horizontal electric field of 14N/C. What is the horizontal component of its velocity at that point
A cylindrical barrel with a radius of 30 centimeter and a mass of 75 kilogram rolls across a warehouse floor without slipping. Evaluate the total kinetic energy of the barrel
A mass on a spring has a angular oscillation frequency of 2.81rad/s. what is the potential energy stored in the mass-spring system when t=1.42s
You are driving home from school steadily at 94 km/h for 150 km. It then begins to rain and you slow to 63 km/h. You arrive home after driving 3 hours and 30 minutes. How far your hometown from school and what is was your average speed.
A 529-kg satellite is in a circular orbit about Earth at a height above Earth equal to Earth's mean radius, Find the gravitational force acting on it
What is walking speed if the speed drops. after an exciting but exhausting lecture, a physic lecture stretch out for a nap on a bed of nails, suffering no injury and only moderate discomfort. how is this possible.
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