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A solar cell generates a potential dissimilarity of 0.24 V when a 530Ω resistor is connected across it, and a potential difference of 0.35 V when a 880 Ω resistor is substituted. What are the (a) internal resistance and (b) emf (in V) of the solar cell? (c) The area of the cell is 2.6 cm2 and the rate per unit area at which it receives energy from light is 5.4 mW/cm2. What is the efficiency of the cell for converting light energy to thermal energy in the 880 Ω external resistors?
A 2.0 kg cart has a spring with k = 5000 N/m attached to its front, parallel to the ground. What is the speed of each cart after the collision
A solenoid is 8.93 cm long, 1.56 cm in diameter, and has 310 turns. find the magnetic flux through one turn of the solenoid
A long, thin rod 5 m lies along the x axis, with its midpointat the origin. find the magnidude of the net torque applied to the rod
a small fly of mass 0.25 g is caught in a spiders web. the web vibrates predominately with a frequency of 4.0 hz.a what
An unstrained horizontal spring has a length of 0.25 m and a spring constant of 180 N/m. Two small charged objects are attached to this spring, one at each end.
When four people with a combined mass of 319 kg sit down in acar, they find that the car drops 2.5 cm lower on its springs. What is the frequency of the car's vibration
An iron wire has a cross-sectional area equal to 9.50 10-6 m2. Carry out the following steps to determine the drift speed of the conduction electrons in the wire if it carries a current of 8.0 A. Calculate the drift speed of conduction electrons in..
A commuter train blows its 200-Hz horn as it approaches a crossing. The speed of sound is 335 m/s. An observer waiting at the crossing receives a frequency of 208 Hz. What is the speed of the train
find an expression for the allowed wavelengths of debroglie waves that fit in a box of length l. what kinetic energies
When a pendulum with a period of 2.00000 s is moved to a new location from one where the acceleration of gravity was 9.80 m/s2, By how much does the acceleration of gravity differ
A car is driven east for a distance of 47 km, then north for 25 km, and then in a direction 29° east of north for 29 km. find (a) magnitude (in km) of car's total displacement from its starting point and (b) the angle (from east) of the car's total..
A small single r=1mm is placed coaxially at the center of a long solenoid n=500 tunrs per cm. the solenoid carries a current i=7sin(wt) a) what is the magnetic field through the small coil? b) What is the flux though the small coil? c) What is the ra..
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