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a boy of mass 522 kg is initially on askateboard of mass 200 kg moving at a speed of 98 ms the boy falls off the
does time dilation mean that time actually passes more slowly in moving reference frames or that it onlyseems to pass
assume your eyes are located 16 cm below the top of your headand 172 cm above the bottom of your feet you are standing
an object 40 cm high is placed 16 cm in front of a convex mirror that has a radius of 16 cm describe the location
an object starts from rest at the origin and moves along the x axiswith a constant acceleration of 4 ms2 its average
nbspyou have a 12 oz cup of coffee at 180 degrees f you add 2 ounces of cold water at 40 degrees fwhat is the
an automobile club plans to race a 750 kg car at the local racetrack the car needs to be able to travelaround several
a power plant burns coal and generates anaverage of 6500 megawatts mw of electrical power whiledischarging 100100 mw as
the human body converts internal chemical energy into work and heat at rates of 60 to 125 w called the basal metabolic
an irregularly shaped object 10 m long is placed with each end on ascale if the scale on the right reads 74 n and the
a 45 micro coulomb charge is situated at the bottom left corner of a square of length 10 meternbsp a - 45 micro coulomb
a student sits at rest on a piano stool that can rotate without friction the moment of inertia of the student-stool
a spring has a radius of 26 cm and an inductance of 75 muh when extended to a length of 09 m find an approximate value
derive a formula for the horizontal range r of aprojectile when it lands at a height h above its initialpoint for h lt
a cannon of mass 1500 kg fires a 10-kg shell with a velocity of 200ms at an angle of 45 above the horizontal find the
engineers redesign a cars wheels with the goal of decreasing eachwheels angular momentum by 30 for a given linear speed
a speeder is pulling directly away and increasing his distance from a police car that is moving at 23 ms withrespect to
an electron is shot into one end of a solenoid as itenters the uniform magnetic field with in the solenoid its speedis
a 070-kg disk with a rotational inertia given by mr22 is free torotate on a fixed horizontal axis suspended from the
at the local playground a child on a swing has a speed of 202 ms when the swing is at its lowest point a to what
a 50kg woman is in a rotor with a 2m radius laying against theinner surface the friction between the womanrsquos
a baseball catcher moves his glove away from a 360 ms fastball as he catches it if the averageforce he exerts on the
a solenoid has 137 turns of wire uniformly wrapped around anair-filled core which has a diameter of 6 mm and a length
an aluminum wire has the same resistance as acopper wire of the same length find the ratio of the aluminumwires
a hall-effect probe operates with a 120 -ma current when the probeis placed in a uniform magnetic field of magnitude