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a child rolls a 0.685kg basketball up a long ramp. the basketball can be considered a thin walled hollow sphere. when the child releases the basketball at the bottom of the ramp, it has a speed of 7.7 m/s. when the ball returns to her after rolling up the ramp and then rolling back down, it has a speed of 4.9 m/s. assume the work done by friction on the basketball is the same when the ball moves up or down the ramp and that the basketball rolls without slipping. find the maximum vertical height increase of the ball as it rolls up the ramp.
Two parallel wires with centers separated by 8.7mm each carry 11A in the opposite direction. Find the magnitude of the force per unit length on each wire
In a simplified model of a hydrogen atom, the electron moves around the proton nucleus in a circular orbit of radius 0.53 × 10^?10 m, Determine the period of the circular motion
The windpipe of a typical whooping crane is about 4.5 feet long. What is the lowest resonant frequency of this pipe
A child goes down a playground slide with an acceleration of 1.40. Find out the coefficient of kinetic friction between the child and the slide if the slide is inclined at an angle of 31.0 below the horizontal.
A small sphere with a mass of 1.0 g is suspended at the end of an insulating string of length 50 cm within a uniform horizontal electric eld of 12,000 N/C. What is the value of the charge on the small sphere
A glass rod is initially neutral. It is then rubbed against a silk cloth. Afterwards, the rod has a charge of +5.0 C, How many electrons did the glass rod lose or gain
A person with perfect pitch sits on a bus bench listening to the 450 Hz horn of an approaching car. If the person detects the frequency of 470 Hz, how fast is the car moving.
The side-view mirror of an automobile has a radius of curvature of 20cm. The mirror produces a virtual image one-third the size of the object. How far is the object from mirror.
Consider purchasing a new tire with a warranty of 6.4 x 10^7 meters. Calculate the thickness of the tread that will be worn away with each revolution of the tire
Two adjacent natural frequencies of an organ pipe are found to be 450 Hz and 495 Hz. What is the length of the pipe
25% of a radioactive material stays active after 4 hours. What is the half-life of this radioactive material
An air parcel moves northwards and becomes entrained in a strong westerly flow, circling the entire globe in the space of a few weeks. State the name given to this high-level flow and define briefly how its structure is related to lateral and vert..
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