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A 250 kg flatcar 30 m long is moving with a speed of 3.0 m/s along horizontal frictionless rails. A 61 kg worker starts walking from one end of the car to the other in the direction of motion, with speed 2.0 m/s with respect to the car. In the time it takes for him to reach the other end, how far has the flat car moved?
What is an average velocity of the rock
A proton has an initial speed of 4.6X10^5 m/s. What potential difference is required to bring the proton to rest
A coating is applied to a lens to minimize reflections. The index of refraction of the coating is 1.66 and that of the lens is 1.56. what is the largest wavelength that is minimally reflected
an electron trapped in a one-dimensional infinite potential well 170 pm wide is in its ground state. how much energy
Water flows at 0.60 m/s through a 3.0 cm diameter hose that terminates in a 0.25 cm diameter nozzle. At what speed does the water pass through through the nozzle
At t1 = 5.00 s, the acceleration of a particle moving at constant speed in counterclockwise circular motion is a1=(2m/s^2)i + (9m/s^2)j At t2 = 6.00 s (less than one period later), the acceleration is a2= (9m/s^2)i - (2m/s^2)j The period is more t..
a lens that has a focal length of 3.99 cm is used as a magnifying glass.a to obtain maximum magnification and an image
In order to calculate the number of ways of arranging a givenamount of energy in a tiny block of copper, How many atoms are in the copper block
The mass of a robot is 5220 kg. This robot weighs 2650 N more on planet A than it does on planet B. Both planets have the same radius of 2.26 × 107 m
to determine the diameter of the sun an astronomer might sight with a transit first to one edge of the sun and then to
A charge of 4.25 uC is placed at each corner of a square 0.100 m on a side. Determine the magnitude of the force on each charge
A parallel-plate capacitor has 1.85 cm2 plates that are separated by 5.72 mm with air between them. how much energy does it store
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