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The contraction of the left ventricle (chamber) of the heartpumps blood to the body. Assuming that the inner surface of theleft ventricle has an area of 78cm2 and the maximum pressure in the blood is125 mm-Hg, estimate the force exerted by the ventricle at maximum pressure.
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Scientist develop a new heat lamp to keep chicks warm in an incubator. It has a conversion efficiency of 6.5% of its input to radiant energy. how much radiant power does it output
Two horses pull a large crate of negligible mass at constant speed across a barn floor by means of two light steel cables. What is the work done by each horse if the box is moved a distance of 29 m
A series RCL circuit includes a resistance of 298 ohm, an inductive reactance of 648 ohm, and a capacitive reactance of 415 ohm. The current in the circuit is 0.634 Amps. What is the Voltage of the alternator?
The femur (the largest leg bone) of a certain person has a cross sectional area of 3.35×10-4m2 and a length of 47 cm. what is the force required to fracture this femur
Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 2.20×106 N , What is the total work done by the two tugboats on the supertanker
Assume the speakers are reconnected so that the 440 Hz sounds they emit are accurately out of phase. At what positions (how far should the microphone be moved to the right) are the intensity maximum and minimum now.
In her bathroom, Mindy has an overhead heater that consists of a coiled wire made of nichrome that gets hot when turned on. The wire has a length of 2.2 m when it is uncoiled. What current does the wire carry
In a series R-L-C circuit, L = 0.205H , C = 80.5?F and the voltage amplitude of the source is 260V, What is the resonance angular frequency of the circuit
A 2.0 kg block slides on a frictionless 25o inclined plane. What are the magnitude and direction of the block's acceleration
A transformer has 390 turns in the primary coil and 230 in the secondary coil. What kind of transformer is this, By what factor does it change the current
Suppose a radio station emits EM waves uniformly in all directions. What is the maximum power level of this radio station so as to avoid electrical breakdown of air at a distance of 2.0m from the antenna
A rotating wheel requires 6.00 s to rotate 30.0 revolutions. What is the constant angular acceleration (in rad/s) of the wheel
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