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An engineer wishes to determine the spring constant of a helical spring. She first puts enough weights on the spring to pull the coils apart. Using a simple wooden meter stick with millimeter marks, she finds that the elevation of the end of the spring changes from 63.5 cm to 52.6 cm when she adds a lab weight whose stamped value is 400 grams. The uncertainty of the stamped weight is 2%. Take g = 9.81 m/s2 with negligible uncertainty.
a. What is the best estimate of the spring constant? (in N/cm)?
b. What is the uncertainty in the value of the spring constant? (in N/cm)
A neutron star is an extremely dense, rapidly spinning object that results from the collapse of a star at the end of its life. What is its rotational inertia
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The Hall effect can be used to determine the density of mobile electrons in a conductor. Find the density of mobile electrons in the material
You are a blacksmith and have been working with 18.3 kg of steel. WHen you are finished shaping it, How much of this water is converted to stem
A 0.113 kg remote control 17.4 cm long rests on a table, as shown in the figure below, with a length L overhanging its edge. How large is the normal force when the button is pressed
A father (m = 90 kg) and son (m = 45 kg) are standing facing each other on a frozen pond. The son pushes on the father and finds himself moving backward at 3 m/s after they have separated. How fast is the father moving.
Velma passes Mort at a speed of 0.75c. At this speed, the "time dilation factor" is 1.5. In other words, Mort observes a 1-second tick of Velma's clock to take 1.5seconds. assume that they are born at the same time, and that Mort observes himself ..
A steam catapult launches a jet aircraft from the aircraft carrier John C. Stennis, giving it a speed of 210 mi/h in 3.00 s. Find the average acceleration of the plane
Explain why the VOLTS/DIV knob of an oscilloscope doesn't have to be calibrated and the TIME/DIV button must be calibrated when measuring time-constants
Two parallel wires separated by 4.3 cm repel each other with a force per unit length of 1.6 multiply.gif 10-4 Nm. Find the current in the other wire
An astronaut can barely resolve two objects on the earth's surface, 230 km below. What is the minimum distance smin that separates the two objects
A uniform density cube of mass m, side 2b, and center at C is placed on a fixed horizontal cylinder of radius r and center O in Earth's gravitational field.
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