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For small stretches, the Achilles tendon can be modeled as an ideal spring. Experiments using a particular tendon showed that it stretched 2.66mm when a 125kg mass was hung from it. Find the spring constant of this tendon. How much would it have to strech to store 50J of energy?
A laser beam of unknown wavelength passes through a diffraction grating having 5460lines/cmafter striking it perpendicularly. At what angle will the next pair of bright spots occur
A grade school student plans to build a 34-power telescope as a science fair project. What focal length is needed for her objective lens
q1. a car takes 9 s to go from v 0 to v 55 ms at about constant acceleration. if you wish to find out the distance
A metal wire has a resistance of 8.00 at a temperature of 20°C. If the same wire has a resistance of 10.85 at 90°C, what is the resistance of the wire when its temperature is -20°C
Two forces are applied to a car in an effort to move it, as shown in the following figure, where F1 = 413 N and F2 = 357 N. What is the resultant of these two forces
A light bulb emits light uniformly in all directions. The averageemitted power is 150.0 W. At a distance of 7 m from the bulb,determine (a) the average intensity of the light,(b) the rms value of the electric field, and(c) the peak value of the elect..
A blacksmith cools a 1.30-kg chunk of iron, initially at a temperature of 650.0?C, by trickling 15.0?C water over it. How much water did the blacksmith trickle over the iron
Consider two wind instruments with pipes of the same length, but one is open and the other is closed on one end. what is the fundamental frequency of the closed pipe
A copper rod has a length of 1.0 m and a cross-sectional area of 4.1 x10-4 m2. What is the mass of ice per second that melts
An AC source operating at 63 Hz with a maximum voltage of 170 V is connected in series with a resistor (R = 1.2 k) and an inductor (L = 3.6 H), What is the maximum value of the current in the circuit
A high-speed flywheel in a motor is spinning at 450rpm when a power failure suddenly occurs. How many revolutions would the wheel have made during this time
An airplane has a mass of 1.7x10^6kg and the air flows past the lower surface of the wings at 96 m/s. If the wings have a surface area of 1200m^2, how fast must the air flow over the upper surface of the wing if the plane is to stay in the air?
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