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In the figure below a crowbar is used to lift a weight. If a down ward force of 228 N is applied to the end of the bar, how much weight does the other end bear? The crowbar itself has negligible weight. (Let r1 = 29.0 cm and r2 = 4.70 cm.)
Two waves traveling in opposite directions along a string fixed at both ends create a standing wave described by y(x, t) = 0.01 sin(44x)cos(1090t). The string has a linear mass density of 0.01 kg/m, and the tension in the string is supplied by a m..
A special electronic sensor is embedded in the seat of a car that takes riders around a circular loop-the-loop at an amusement park. What is the speed of the rider at the top of the loop
wheel A of radius rA = 11 cm is coupled by belt B to wheel C of radius rC = 20 cm. The angular speed of wheel A is increased from rest at a constant rate of 1.6 rad/s2. Find out the time needed for wheel C to reach an angular speed of 100 rev/min,..
A large population of aloha users manage to create 50 request/sec,including both originals and retransmissions.time is slotted in units 40msec.
The energies associated with molecular rotation and vibration are quantized and photons can be emitted or absorbed by molecules making transitions from one rotational or vibrational state to another.
A copper wire has a square cross section 2.7 on a side. The wire is 3.8 long and carries a current of 4.0 . The density of free electrons is 8.5*10^28 m^-3.
A 5000 W electric heater is used for 32 hours. Calculate the energy consumed in this period. The plates are seperated by a distance of .100 mm. what is the current drawn by the heater
You are driving north on 107th Avenue at a speed of 31.2 mph. At what frequency do you hear the siren
A spherical shell has an outside radius of 2.45 cm and an inside radius of a. The shell wall has uniform thickness and is made of a material with density 4.74 g/cm3. What is this maximum mass
A small monkey is traveling along a branch, What is the max speed of the monkey during this interval? Show all calculations
(a) Calculate the R-value of a thermal window made of two single panes of glass each 0.100 in. thick and separated by a 0.200-in. air space. By what factor is the transfer of energy by heat through the window reduced by using the thermal window inst..
A child slides across a floor in a pair of rubber-soled shoes. The friction force acting on each foot is 20 N, what is the horizontal distance traveled by the sheared face of the sole
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