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When a man stands on his scale, it reads 92.6 kg. when hepulls down on a chin-up bar installed over the scale, the reading decreases to 75.1 kg. what is the magnitude of the force he exerts on the chin-up bar?
An ideal gas at 26.9°C and a pressure 1.60 105 Pa is in a container having a volume of 1.00 L. Determine the number of moles of gas in the container
Two football players are initially 2m apart. At the same instant they accelerate towards each other, Draw a picture. Define your coordinate system
A subway train has a sound intensity level of 90 dB, and a rock band has a sound intensity level of 110 dB. How many times greater is the sound intensity of the band than that of the train
A garden hose with an internal diamter of 1.9 cm is connected to a (stationary) lawn sprinkler that consists merely of a container with 24 holes, each of 0.13 cm in diamter. If the water in the hose has a speed of 0.91 m/s, at what speed does it leav..
an advertisement claims that a particular automobile can stop on a dime. what net force would actually be necessary to
A 15 g bullet strikes and becomes embedded in a 1.10 kg block of wood placed on a horizontal surface just in front of the gun. what was the muzzle speed of the bullet
a telescope consists of a mirror with radius of curvature 4.5 m and an eyepiece. if an astronomer would like the
What is the temperature at point B?What is the work done BY the gas in the transition A to B? What is the efficiency of a Carnot cycle running between the lowest and highest temperature of the cycle above
you are to purchase a grating that will cause the deflection of the n=2 second- order bright band for red light to be 42°. How many lines per centimter should your grating have
Two small spheres spaced 20centimetres apart have equal charge. How many excess electrons should be present on each sphere if magnitude of the force of repulsion between them is newtons.
A copper wire is 2 meters long. when a certain load is hung from the wire, making sure the wire is straight, how much does each inter-atomic bond stretch
a swimmer is capable of swimming 0.60 ms in still water.a if she aims she aims her body directly across a 55 meter wide
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