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Biological muscle cells can be thought of as nanomotors that use the chemical energy of ATP to produce mechanical work. Measurements show that the active proteins within a muscle cell (such as myosin and actin) can produce a force of about 8.0pN and displacements of 7.0nm.
Part A How much work is done by such proteins?
A fisherman's scale stretches 4.0cm when a 2.3kg fish hangs from it. What is the spring stiffness constant
The area of the opening can be calculated from pi (3.1416) times the radius squared. If your pupil is open to a radius of 3.5 mm, explain how much light energy passes through in one minute? Give your answer in mJ.
During an all-night cram session, a student heats up a 0.836 liter (0.836 x 10- 3 m3) glass (Pyrex) beaker of cold coffee. How much coffee (in cubic meters) has spilled out of the beaker
A rectangular loop of N close-packed turns is positioned near a long straight wire, find the formula for the mutual inductance M for the loop-wire combination
You need to prepare a 0.187mm-diameter tungsten wire with a resistance of 3.43 ohm. How long must the wire be
A laser beam is incident on two slits with a separation of 0.210 mm, and a screen is placed 4.80 m from the slits. find the wavelength of the laser light
A 7 kg ball is lifted from the ground to a height of 45 meters above the ground. The ball is then dropped. After the ball has fallen 5.5 m, what is it's PE and KE and how fast is it going?
Tarzan has foolishly gotten himself into another scrape with the animals and must be rescued once again by Jane, What is Jane's (and the vine's) angular speed just before she grabs Tarzan
A spring with spring constant k = 430 N/m is initially compressed x = 1.60 cm. How much work is done by the spring during this process
A mass-spring system is in simple harmonic motion. It has a spatial frequency F and amplitude A. what fraction of the system energy is kinetic
An electric motor rotating a workshop grinding wheel at a rate of 9.20x101 rev/min is switched off. How long does it take for the grinding wheel to stop
A 200-turn circular coil of wire has a radius of 10.0 cm and a total resistance of 0.115 Ohms. Determine the voltage of the power supply creating the current in the coil
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