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A camera is equipped with a lens with a focal length of 30cm. when an object 2 m (200cm) away is being photographed; how far from the field should the lens be placed? What is the magnification?
A circuit employs a silicon solar cell to detect flashes of light lasting 0.25 s. what is the minimum power of a flash of light of wavelength
A certain fluid has a density of 1090 kg/m3 and is observed to rise to a height of 2.3 cm in a 1.0-mm-diameter tube. Calculate the surface tension of the fluid
One end of a horizontal spring (k = 66.1 N/m) is held fixed while an external force is applied to the free end, stretching it slowly from xA = 0 to xB = 3.50 cm. Find the work done by the applied force on the spring
An aluminum wire has a length of 20m and adiameter of 0.0025in. It is connected to a 9.35V battery. The resistivity of aluminium is 2.65x10^-8(ohm(m))a).
A weight of 45.0 N is suspended from a spring that has a force constant of 180 N/m. Determine the maximum value of the driving force
An electron beam contains electrons that move along the +x-axis at 0.020c. The beam enters a region of length 1.0 m and runs parallel to a wire that carries a 0.20-A current in the +x-direction.
Three capacitors numbered 1, 2 & 3, each have the same value of capacitance, What is the effective total capacitance
A ball rolls off horizontally from a table that is 1.25m with an speed of 2.31m/s. How far away is the ball from the base of the table when it hits the floor?
An 8 Meter ladder is leaning against a frictionless wall making a 60 degree angle with the ground. What are the forces excreted on the ladder by the wall and the ground
Assuming biological substances are 98 percent water, estimate the masses of a cell with a diameter of 0.7 µm, a human kidney, and a fly. Take a kidney to be roughly a sphere with a radius of 5.0 cm and a fly to be roughly a cylinder 4.90 mm long a..
Electromagnetic waves, with frequencies ranging from 4.00 x 10^14 Hz to 9.00 x 10^16 Hz, Find the maximum kinetic energy of electrons ejected from this surface
A light-bulb of power 40 Watts is operating with a potential difference of 120 V across it. What is the current and resistance of the filament
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