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Calculate the time in seconds for a solid sphere starting at rest to roll down an incline without slipping. Assume the initial height of the sphere is 1 meter and the incline has an angle 45 degrees. Ignore air friction and use g=9.8m/s^2 (Drive the result from first principles). B)Same question but for a solid cylinder. C) Which one wins in a race?
Describe the relationship between electron orbital energy levels and the energy of light that electrons emit for atoms in a gas.
Which completely absorbs the beam. If the laser exerts a force of 96 nN(9.6 multiply.gif 10-8 N) on the surface, how many photons are striking the surface every second?
my kids came up with a form of tether ball where they attached a ball to a string and let it swing around the role.
A small airplane accelerates from rest at a constant acceleration of 1.2 m/s^2 along the runway. How long did this take
The magnitude of the magnetic flux through the surface of a circular plate is 3.30x10-5 m^2 when it is placed in a region of uniform magnetic field that is oriented at 55.0 degree to the vertical. The radius of the plate is 8.50 cm. Determine the s..
Using the equation for kinetic energy Ek=1/2mv^2 (where m is mass and v is speed) calculate the kinetic energy of the Eurasian plate, give the final answer to the nearest order of magnitude.
Two different grades of iron are used. When a coil having 2000 turns is wound on part B, and a current of 0.5A is applied to it, the relative permeability of part A is measured as 500, and of part B as 1000. Calculate the Reluctance of part A
An object is 38 cm in front of a diverging lens with a focal length of 19 cm . Use ray tracing to determine the location of the image.
A record (mass 100g and radius 12cm) is rotating at a rate of 33rpm. What is the new rotational rate if angular momentum is conserved
a soccer player kicks a soccer ball initially at rest setting it in motion at a velocity of 30 m/s. what is the force exerted on the players foot
A girl delivering newspapers covers her route by traveling 5.00 blocks west, 4.00 blocks north, and then 8.00 blocks east. What is the total distance she travels
On a dry day, a car is approaching flat highway curve. If the highway curve has a radius of a 60 m, What is the maximum safe speed for the car
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