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A pen contains a spring with a spring constant of 251 N/m. When the tip of the pen is in its retracted position, the spring is compressed 5.90 mm from its unstrained length. In order to push the tip out and lock it into its writing position, the spring must be compressed an additional 6.50 mm. How much work is done by the spring force to ready the pen for writing? Be sure to include the proper algebraic sign with your answer.
When monochromatic light shines perpendicularly on a soap film (n = 1.33) with air on each side, What is the vacuum wavelength of the light
During a snowball fight, two snowballs travelling towards each other collide head-on. The first is moving east at a speed of 15.3 m/s and has a mass of 0.450 kg, What is the mass of the second snowball
After a plant or animal dies, its 14C content decreases with a half-life of 5730 years. what is the age of the ancient site
An eagle can determine that two light brown shrews sitting 1.0 cm apart on a pathway 125 m below her are in fact two shrews rather than a small rat. estimate the diameter of her pupil
One fragment, whose speed immediately after the explosion is zero, falls vertically. Illustrate what is the horizontal speed of the other fragment?
Two sinusoidal waves of the same period, with amplitudes of 7.0 and 9.0 mm, What is the phase constant of the other wave
"Jerk" is the rate of change of acceleration, and it's what can make you sick on an amusement park ride. Find an expression for the maximum jerk
Two point charges are separated by 10.0 cm and have charges of +2.00 uC, What is the electric field at a point midway between the two charges
A 1 kg block of Al is heated at atmospheric pressure so that its temperature increases from 22.0 degrees C to 40.0 degrees C. calculate The work done by the Al block
Find the surface tension force on water inside a tube and height to which the water rises in the tube.
The intersection is 15 m wide. Her car's maximum deceleration is -5.20 m/s2, whereas it can accelerate from 44km/h to 70km/h in 7.8 s. overlook lengths of her car and her reaction time.
Elements that appear in the same column of the periodic table often share similar chemical properties. In the case of the alkaline earth metals, this is troublesome since the body treats calcium, calculate the path radius of the Ca ion
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