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The mass of Uranus is 9x10 to the 25th kg. Its mean distance from the earth is about 3x10 to the 12th meters. Estimate your mass in kilograms at birth. Then find the force exerted upon your body at birth by Uranus. Is it very large? Next assume that you were delivered by a 100 kg physician who was on the average about 10 cm from you at birth. What force did this doctor exert on you at birth? What would seem to be more important, the planet Uranus or the physician?
My mass at birth was 9 lbs.
Some European trucks run on energy stored in a rotating flywheel, with an electric motor getting the flywheel up to its top speed of 200p rad/s. What is the kinetic energy of the flywheel after charging
An accelerating car starting from rest reaches a certain distance with the speed 20 m/s. What was its speed at half this distance
At amusement parks, there is a popular ride where the floor of arotating cylindrical room falls away, leaving the backs of theriders "plastered" against the wall. Suppose the radius of the roomis 3.52 m and the speed of the wall is 11.5 m/s when t..
A bright object and a viewing screen are separated by a distance of 60.5 cm. At what location(s) between the object and the screen should a lens of focal length 12.2 cm be placed in order to produce a crisp image on the screen?
A plastic sphere floats in water by 50.0% of its volume submerged. This same sphere floats in glycerine with 40.0% of its volume submerged. Decide the densities of (a) the glycerine and (b) the sphere.
Find the modulation index corresponding to the given trapezoidal pattern for the AM signal.
Suppose a 65 kg person stands at the edge of a 6.5 m diameter merry-go-round turntable that is mounted on frictionless bearings and has a moment of inertia of 1850 kg m2. Calculate the angular velocity of the turntable
You can hear beats when two tuning forks are sounded together. The tuning forks have labels showing them to be 242 Hz and 248 Hz frequencies
A piano tuner sounds two strings simultaneously. One has been previously tuned to vibrate at 301.0 Hz. What was the original frequency of the untuned string
Calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 7.0 g.Silver has 47 electrons per atom, and its molar mass is 107.87g/mole.
The membrane of the axon of a nerve cell is a thin cylindrical shell of radius r = 10-5 m, length L = 0.42 m, and thickness d = 10-8 m. Find the electric field through the membrane
A child is riding a merry-go-round which completes a revolution every 8.36 s. The child is standing 4.65 m from the center of the merry-go-round. Evalute the magnitude of the centripetal acceleration of the child?
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