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A person traels by car from one city to another with different constant speeds between pairs of cities. She drives for 30.0 min at 80.0km/h,12.0 min at 100km/h ad 45.0 min at 40.0km/h and spends 15.0min eating lunch and buying gas. (a) determine the average speed for the trip. (b) determine the distance between the initial and final cities along the route.
You are to make four straight-line moves over a flat desert floor,starting at the origin of an xy coordinate system andending at the xy coordinates (-160 m, 36 m).
q1. a large tanker truck can carry 30 ton of liquid. a what volume of water can it carry? b what volume of gasoline can
A car traveling at a speed of 18 m/s crashes into a solid concrete wall. The driver has a mass of 90 kg. What is the change in momentum of the driver as he comes to a stop
A light ray with an incident angle of 38.5 degrees crosses from air to a solution and has an angle of refraction of 21.9 degrees. What is the speed of the ligth ray in the solution
A piece of Nichrome wire has a radius of 5.50 10-4 m. It is used in a laboratory to make a heater that uses 3.00 102 W of power, estimate the necessary length of wire
A converging lens of focal length 0.25 m forms a virtual image of an object, What is the distance between the object and the lens
q1. the student now starts moving a box up a 10.0deg incline keeping her 142 n forces directed at 27.0deg above the
In this problem two moles of an ideal gas at 400 K expand quasi-statically and isothermally from an initial volume of 49.0 L to a final volume of 83.0 L. What is the entropy change of the gas
A ray of red light in air (wavelength=650nm) is incident on a semicircular block of clear plastic (n=1.51 for this light), Th ray strikes the block at its center of curvature at an angle of incident of 27 degrees. Determine the wavelength of the l..
An object is solid throughout. When the object is completely submerged in ethyl alcohol, its apparent weight is 14.9 N. compute the volume of the object
A solid sphere with mass m = 1.5 kg a radius r = 0.20 m rolls without slipping on a flat surface with an angular velocity of ? = 7.2 rad/s. What is the total kinetic energy of the sphere
The velocity vs. time curve of an object is an increasing straight line. What is the acceleration of the object
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