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A woman supports a 50 kg barbell at 90 degrees by contracting the biceps in both arms. Her biceps insert 4 cm from the elbow and the barbell in her hands is 24 cm away. Calculate how much force her biceps must produce to support the barbell. (By keeping her arm at a 90 degree, she is maintaining static equilibrium). What type of lever is used in this problem?
q1. what temperature change would reason a 0.20 enhance in the volume of a quantity of water that was at first at 20
Estimate the terminal velocity for a dust particle in air. Assume it has a radius of 1.0 um and a density similar to that of balsa wood
Two identical capacitors are connected in parallel to an ac generator that has a frequency of 574 Hz and produces a voltage of 24 V. What is the capacitance of each capacitor
You're an optometrist, mounting a projector at the back of your 4.2-m-long exam room, 2.6m above the floor. At what height should you center the pattern on the wall
A rock of mass 49 kg accidentally breaks loose from the edge of a cliff and falls straight down. What is the magnitude of the acceleration of the rock
Two large, parallel, conducting plates are 17 cm apart and have charges of equal magnitude and opposite sign on their facing surfaces, Find the electric field at the position of the electron
The Mariana trench is located in the Pacific Ocean at a depth of about 11 000 m below the surface of the water. For comparison, determine the weight of a jetliner whose mass is 8.19 × 105 kg
A 245 turn coil has an area of 3.3 cm2 and rotates in a magnetic field of 0.5 T. What frequency will generate a maximum emf of 10 V
A system of 1610 particles, each of which is either an electron or a proton, How many electrons are in this system
A 0.2 object is swung in a vertical circular path on a string 0.1 m long. The acceleration of gravity is 9.8 m/s^2. If a constant speed of 4.07 m/s is maintained, what is hte tension in string when the object is at the top of the circle? Answer in..
Calculate the camel's eastward displacement while he crosses the desert. reply in units of km.
Explain how long is the bullet in the target? What average force does the bullet exert on the target? What is the target's speed just after the bullet emerges?
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