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A battery with an emf of 12.0 Volt shows a terminal voltage of 11.82 Volt when operating in a circuit with three 9.3 W light bulbs connected in parallel with it. Find the battery internal resistance in units of ohms?
A 234.0 g piece of lead is heated to 86.0oC and then dropped into a calorimeter containing 611.0 g of water that initally is at 24.0oC. find the final equilibrium temperature (in oC) of the lead and water
A spring is stretched between two posts. When a pulse is produced at one end of the spring, it makes 4 back-and-forth trips along the spring in 3.4 s. If the pulse has a propagation speed of 12 m/s, how far apart are the posts?
A computer can fetch information from the memory in 3.0 ns, a process that involves sending a signal from the Central Processing unit (CPU) to memory and awaiting return of the information. find the maximum distance between the CPU and the memory
The length of a steel bar increases by 0.039 % when itstemperature is increased from 0o C to 35o C. Calculate the temperature coefficient of linear expansion for thisbar. (Round the answer to three significant figures.)
A lens is made of a transparent material having an index of refraction of 1.7. One side of the lens is flat, and the otherconvex with a radius of curvature of 28cm.(a) Find the focal length of the lens.
the earth puts a gravitational force on the moon. the moon puts a gravitational force on the earth. how do the
Assuming wind forces can be neglected, what is the highest that one can make a solid concrete tower of uniform cross-section (Take the density of concrete to be 2,400 kg/m^3)
Lightbulbs with the power ratings giving in the figure are connected in a circuit as shown. Find the power dissipated to each bulb
The Great Pyramid of Cheops at El Gizeh in Egypt had a height H = 185 m before its topmost stone fell. How much work was required to lift the rocks from base level to build this pyramid
Two point charges, initially 2.0 cm apart, experience a 1.0-Nforce. If they are moved to a new separation of 8.0 cm, what is the electric force between them?
If the two halves of the log only separate by a distance of 0.05m while the wedge travels 0.2m into the log, how much force is the wedge exerting on the two halves of the log to rip them apart.
a coal-fired electric power plant has an overall efficiency of 28 and an output of 1845 megawatts. how many tera joules
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