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A 4.3-m long plank with a weight of 164 N is place on a dock with 1.4 m of its length extended over the water. The plank is uniform in density. A boy with a weight of 141 N is standing on the plank and moving out slowly from the edge of the dock. How far from the edge of the dock can the boy move until the plank is just on the verge of tipping?
Due to a tune-up, the efficiency of an automobile engine increases by 7.00 %. For an input heat of 1290 J, how much more work does the engine produce after the tune-up than before
create a position vs. time speed vs. time and acceleration vs. time graph for both cars. write a paragraph comparing
When people exercise they shed heat to the environment by sweating and radiating. calculate the rise in body temperature after 1 hour
q1. a horse races once around a circular track in a time of 118s with a speed of 17 ms. what is the radius of the
my friend bob takes a leisurely stroll at a constant speed of 1.2 m/s for 8.5 mins to the south then jogs at a constant speed of 2.7m/s for 6.3 mins to the south
Illustrate what is the maximum mass, m1, that can be hung from the chords before the 5.0kg mass just begins to move?
Air flows through the supersonic nozzle. The inlet conditions are 7 KPa and 420 degree C. The nozzle exit diameter is adjusted such that the exiting velocity is 700m/s. Calculate the exit temperature
Ions A and B are separated by 12 E -10m. Ion A has a charge of -2e. The electrostatic force between the two ions has a magnitude of 1.598 E -9 N. How many electrons are "missing" from it
What is the radius of the curve?
A 1 cm3 air bubble at a depth of 280 meters and at a temperature of 4 oC rises to the surface of the lake, what is its new volume? How many micromoles (to 1 decimal place) of air are in the bubble
A particle of mass 2 units moves along the x-axis attracted toward the origin by the force whose magnitude is numerically equal to 8x. find the differential equation describing the motion
A string that is fixed at both ends has a length of 2.68 m. When the string vibrates at a frequency of 83.9 Hz, What is the wavelength of the waves that travel on the string
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