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A 100-kg astronaut (mass includes space gear) on a space walk is 5.0 m from a 3000-kg space capsule and at the full length of her safety cord. To return to the capsule, she pulls herself along the cord. Where do the astronaut and the capsule meet?
An electric motor turns a flywheel through a drive belt that joins a pulley on the motor and a pulley that is rigidly attached to the flywheel as shown in the figure below. The flywheel is a solid disk with a mass of 70.5 kg and a radius R = 0.625..
A very long solenoid with a circular cross section and radius r= 6.10 cm with n= 1.20E+4 turns/m has a magnetic energy density uB= 4.50 mJ/m3. What is the current in the solenoid
a 10.0 kg mass is acted upon by a force given by (16 + 5x -4x^2)(i), where x is measured in meters. How much work is done by this force as the mass moves from x=0 to x=+3m
A certain semiconductor device requires a tunneling probability of T=10^-5 for an electron tunneling through a rectangular barrier with a barrier height of Vo=0.4eV. Determine the maximum barrier width
A 1500 kg elevator starts from rest and moves upward with constant acceleration for 4.0 s until it reaches its operating speed of 2.0 m/s. Calculate the power required by the elevator motor while the elevator is operating at its operating speed
A typical adult human lung contains about 270 million tiny cavities called alveoli. Estimate theaverage diameter of a single alveolus. Assume the alveoli arespherical and a typical human lung is about 2.05 liters.
Two alpha particles (helium nuclei), each consisting of two protons and two neutrons, What is the distance between these particles at this time
In a large centrifuge used for training pilots and astronauts, a small chamber is fixed at the end of a rigid arm that rotates in a horizontal circle. How long is the arm of the centrifuge
What is velocity relative to the ice surface
An object that is 27 cm in front of a convex mirror has an image located 13 cm, How far behind the mirror is the image located when the object is 13 cm in front of the mirror
Compute the magnitude and direction of the total gravitational force exerted on one sphere by the other three.
A 2.9-cm-tall object is 35 cm in front of a converging lens that has a 8.8 cm focal length. Calculate the image position and height
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