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What is the regular pressure on the soles of the feet of a standing80.7-kg person due to the contact force with the floor? Each foot has a surface area of 0.021 m2.
If an asteroid with mass 6.22E+17kg has radius 32000m, what is the acceleration due to gravity near its surface
A proton ,a deutron and an alfa particle ,accelerated through the same potential difference ,enter a region of uniform magnetic field moving at right angles to B.(a) compare their kinetic energies .(b) if the radius of the proton’s circular path is 1..
A gasoline engine absorbs 2,600 J of heat and performs 1,000 J of mechanical work in each cycle. Find the total of heat expelled in each cycle.
In designing a transformer, an engineer knows she needs 240 V to come out of the secondary circuit. what is the ratio of primary voltage to primary turns
the acceleration of gravity near the surface of the moon has about on-sixth the magnitude that it does on earth. the
A bicycle and its rider together has a mass of 78 kg. What power output of the rider is required to maintain a constant speed of 5.0 m/s (about 11.2 mph) up a 5.0% grade
A roller coaster at the Six Flags Great America amusement park in Gurnee, Illinois, incorporates some clever design technology and some basic physics. What is the radius of the arc of the teardrop at the top
An ideal refrigerator does 130 J of work to remove 655 J of heat from its cold compartment during each cycle. How much heat per cycle is exhausted to the kitchen
A 20x telescope has a 12-cm diameter objective lens. What minimum diameter should the eyepiece lens have to collect all the light rays from an on axis distant source.
A bat, moving at 5.56m/s, is chasing a flying insect where the speed of sound is assumed to be 340m/s. what is the speed of the insect
When two tuning forks of 128 Hz and 149 Hz, respectively, are sounded simultaneously, how various beats per second are heard.
Water has a mass mole of 18.0g/mol, each water molecule(H20) has 10 elelctrons. What is net charge of all electrons? How many electrons are there in one liter (1.00 x10-3m-3) of water?
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