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A steel wire of length 1.98m with circular cross section must stretch no more than 0.220cm when a tensile (stretching) force of 360N is applied to each end of the wire. What minimum diameter d is required for the wire?
q1. on the wheel of fortune game show a solid wheel of radius 6.7 m and mass 10 kg is given an initial counter
A person with a near-point distance of 29 cm is able to get a usable magnification of 12 with a particular magnifying glass. What is the friend's near-point distance
The windings of a DC motor have a resistance of 6.0 O. The motor operates on 120. V AC, and when running at full speed it generates a back emf of 105. V. What is the starting current of the motor
Light of a wavelength of 661.1 nm is received from a star that is emitting light of wavelength of 659.6 nm. How fast is the star moving relative to the earth
A nail projects 40.0 mm horizontally outward from a wall. A 25.0 N coat is hung from the end of the nail and the nail deflects downward by 2.50 10-6 m. The shear strain of the nail is
A 1m long cantilevered beam of rectangular cross section carries a uniform load of (w = 15 kN/m). The design specification calls for a 5-mm maximum deflection of the end of the beam. The beam is to be constructed of fir (E = 13 GPa). By analysis, det..
An ice skater rotating 3.85 rad/s with arms extended has a moment of inertia of 2.31 kg*m^2. what is the final angular speed
Two boats start together and race across a 62-km-wide lake and back. Boat A goes across at 62 km/h and returns at 62 km/h. Boat B goes across at 31 km/h, and its crew, realizing how far behind it is getting, returns at 93 km/h.
What would be the equilibrium temperature when a 227 block of copper at 265 is placed in a 155 aluminium calorimeter cup containing 844 of water at 14.50.
q. a paratrooper pilot fell 360 m after jumping without his parachute opening. he landed in a snow bank creating a
How many oxygen molecules do you inhale if you are at sea level?
A rocket traveling at 0.450c sets out for the star, which is 4.35ly away from earth. According to the stay-at-home earthlings, how long will the journey last
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