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Question: An 18-cm-long bicycle crank arm, with a pedal at one end, is attached to a 20-cm-diameter sprocket, the toothed disk around which the chain moves. A cyclist riding this bike increases her pedaling rate form 60 rpm to 90 rpm in 10 s.
a. What is the tangential acceleration of the pedal?
b. What length of chain passes over the top of the sprocket during this interval?
Suppose the temperature of 4.67 L of ideal gas drops from 354 K to 275 K. Find the number of moles of gas
A football player with a mass of 89 kg and a speed of 2.1 m/s collides head-on with a player from the opposing team whose mass is 120 kg. Find the speed of the second player
Find the speed and acceleration of an electron in the first two Bohr orbits of the Li++ Ion. Also find the acceleration of an electron in the first two bohr orbital of the H atom.
Some people think that they can stop themselves rushing forward by putting their hands on the dashboard. Find out the mass of the object that has a weight equal to force you just calculated.
at the surface of the ocean the water pressure is the same as the air pressure above the water 15 lbin2. below the
a magnetic field is oriented at an angle of 39? to the normal of a rectangular area 4.8cm by 7.7cm if the magnetic flux
A copper rod has a length of 1.2 m and a cross-sectional area of4.0 x10-4 m2. One end of the rod is incontact with boiling water and the other with a mixture of ice andwater. What is the mass of ice per second that melts? Assume that no heat is lo..
A block weighing 50 N rests on a 37 deg incline. If the incline is frictionless what would be its acceleration down the incline
Consider an optical gain medium that has two levels at E 1=1.50 eV and E 2=3.50 eV. What is the spontaneous emission wavelength
The E string of a violin has a lenght of 0.33 m and a fundamental frequencynof 659 Hz. The tension of the string is 55N, What is the wave velocity of the string
A circular loop in the plane of the screen lies in a 0.60 T magnetic field pointing into the screen. The loop's diameter changes from 18.5 cm to 6.0 cm in 0.50 s.
Suppose the work function for a particular metal is 5.09 eV. Find the cut-off frequency for this metal
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