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Why does the emission spectrum of hydrogen or unknown source have a distinct line spectrum instead of a continuous one?
An amusement park ride is shown in Fig. 1. It has a motorized vertical shaft with twoattached cables. The cables join at a seat which holds a seated passenger. The combinedseat and passenger have a weight of 1050 N. The seat swings in a horizo..
A 2.0kg wood block is launched up a wooden ramp that is inclined at a 27? angle. What speed does it have when it slides back down to its starting point
A particle travels 18 times around a 11-cm radius circle in 45 seconds. What is the average speed (in m/s) of the particle
A child sitting 1.20 from the center of a merry-go-round moves with a speed of 1.65. Calculate the net horizontal force exerted on the child
With cooperation acrobats in circular rotating cages that are attached to two beams in a shape of a cross (one cage attached to each end of the beam) can rotate the beams. Where does this energy come from
The half life of a mystery radioactive substance is one day. If a sample of the mystery radioactive substance starts with 5 x 105 nuclei of the radioactive substance, How many nuclei are left after 200 hours
A 3.00-kg block starts from rest at the top of a 30.0degree inclineand slides 2.00 m down the incline in 1.50 s. Find (a) theacceleration of the block, (b) the coefficient of kinetic frictionbetween the block and the incline, (c) the frictional force..
A ball is dropped from rest at the top of a 6.10 m tallbuilding, falls straight downward and collides inelastically withthe ground, and bounces back. How many bounces can the ball make and still reach a windowsill that is2.38 m above the ground
When a test charge q0 = 6 nC is placed at the origin, it experiences a force of 8 ? 10-4 N in the positive y direction. What is the electric field at the origin
Liquid isobutane is throttled through a valve from an initial state of 360 K and 4000 kPa to a final pressure of 2000 kPa. Estimate the temperature change and the entropy change of the isobutane. The specific heat of liquid isobutane at 360 K is 2.78..
1 what is the spring stiffness of the entire wire considered as a single macroscopic very stiff spring?2 how many
A magnetic field of 1.4 T is perpendicular to a square coil of 14 turns. The length of each side of the coil is 4 cm. Discover the magnetic flux during coil. Find the magnetic flux during the coil if the magnetic field makes an angle of 45? with the ..
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