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A weightless spring of force constant 2.50 N/cm is 15.0 cm long when nothing is attached to it. It is now used to pull horizontally on a 12.5 kg box on a smooth horizontal floor. You observe that the box starts from rest and moves 96.0 cm during the first 1.60 s of its motion. How long is the spring during this motion?
a girl who weighs 720 N rides on a FErris wheel of radius 7.5 m. when at the top of the wheel her effective weight is 600 N. Find out her speed and the angular speed of the wheel
Unpolarized light is incident on a linearly polarizing filter oriented 30 degrees with respect to the horizontal. find the final intensity that emerges from the last polarizing filter
With brakes fully applied, a 1430kg car decelerates from a speed of 74km/hr. What is the work done by the braking force in bringing car to a stop.
a 3 kg block slides with a speed of 1.1 ms on a frictionless horizontal surface until it encounters a spring.a. if the
A piston A has a diameter of 0.76 cm, as shown. A second piston B has a diameter of 2.1 cm. In the absence of friction, determine the magnitude of the force ~F necessary to support the 601.5 N weight.
As a function of time, the velocity of the football can be written as. Calculate the average acceleration vector of the football
use the sackur- tetrode equation to calculate the entropy of a mole of argon gas at room temperature and atmospheric
If two adjacentnatural frequencies of an organ pipe are determined to be 475 Hzand 575 Hz calculate the frequency and length of the pipe
Spacecraft A is being overtaken by spacecraft B that is traveling at 0.40c relative to spacecraft A. How far away is spacecraft A when the missile is fired according to spacecraft B
A soccer player extends her lower leg in a kicking motion by exerting a force with the muscle above the knee in the front of her leg. What is the force exerted by the muscle if its effective perpendicular lever arm is 1.80 cm
The allowed energies of a simple atom are 0.0eV , 3.5eV and 5.0eV . An electron traveling at a speed of 1.6×10^6m/s collisionally excites the atom. What is the maximum speed the electron could have after the collision
a ferry transports tourists among three islands. it sails from the first island to the second island 4.17 km away in a
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