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Biological muscle cells can be thought of as nanometres that utilize the chemical energy of ATP to produce mechanical work. Measurements show that the active proteins within a muscle cell (such as myosin and act in) can produce a force of about 7.5 pN and displacements of 8.0 nm. How much work is done with such proteins?
Nichrome is a nickel chromium allot commonly used in heating elements. suppose you have a coil of nichrome wire that is 25.0 m long, what is the resistance of the Nichrome wire
Staring from rest, a hoop rolls without slipping down a long ramp. What is its translational speed when it's 5.0 m below its initial height, determine the hoop's translational speed
a garden hose with a diameter of 0.63in. has water flowingin with a speed of 0.78m/s and a pressure of 1.2 atmosphere. estimate the speed of water in the nozzle
A particle with a charge of -60.0 nC is placed at the center of a nonconducting spherical shell of inner radius 20.0 cm and outer radius 24.0 cm, Calculate the speed of the proton
Calculate the terminal velocity for a pollen grain falling through the air using the drag force equation. Assume the pollen grain has a diameter of 7 µm and a density of 0.7 g/cm3
When a 0.045 kg golf ball takes off after being hit, its speed is 37 m/s. How much work is done on the ball by the club
An electron has a momentum that is two times larger than its classical momentum. Find the speed of the electron
An airplane with a speed of 71.4 m/s is climbing upward at an angle of 49.5 ° with respect to the horizontal. When the plane's altitude is 692 m, the pilot releases a package. (a) Calculate the distance along the ground, measured from a point directl..
A supply plane needs to drop a package of food to scientists working on a glacier in Greenland. How far short of the target should it drop the package
a 1500 kg car drives around a flat 200 m diameter circular track at a constant speed of 25 ms. a what is the magnitude
A flat observation screen is placed at a distance of 4.5 m from a pair of slits. The separation on the screen between the central bright fringe and the first-order bright fringe is 0.043 m. Determine the slit separation
Determine the angular acceleration of the pulleys and the tension T in the cord supporting the 612 Kg mass when it is released from rest.
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