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In the dangerous "sport" of bungee-jumping, a daring student jumps from a hot-air balloon with a specially designed elastic cord attached to his waist, as shown in the figure below. The unstretched length of the cord is 26.0 m, the student weighs 675 N, and the balloon is 36.0 m above the surface of a river below. Calculate the required force constant of the cord if the student is to stop safely 4.00 m above the river.
A 34.7 m long aluminum wire at a temperature of 24.3 oC has a radius of 0.295 mm. what is the resulting current in the wire
A baseball approaches home plate at a speed of 46.0 m/s, moving horizontally just before being hit by a bat. What is the average vector force the ball exerts on the bat during their interaction
Two toy locomotives approach each other along the same line, and upon collision both stop dead still. What is the mass of the faster locomotive
In an electron microscope, there is an electron gun that contains two charged metallic plates 2.90 cm apart. Determine the acceleration of the electron
A crate of mass 2000 kg is hanging from a crane at the end of a cable 12 m long. what angle will the cable finally make with the vertical
A 0.400 glider is moving to the right on a frictionless, horizontal air track with a speed of 0.750 when it makes a head-on collision with a stationary 0.150 glider. Find the final kinetic energy of second glider
A sanding disk with rotational inertia 2.0 multiply.gif 10-3 kg·m2 is attached to an electric drill whose motor delivers a torque of 8 N·m about the central axis of the disk. compute the angular momentum of the disk
At the end of a race a runner decelerates from a velocity of 10.00 m/s at a rate of 0.400 m/s2. What is her final velocity
By landing properly and on soft ground (and by being lucky!), How fast would a person be falling when he reached the ground if there were no air drag
What is the density of Neon gas at standard temperature and pressure? The atomic mass of Neon is 20.18 atomic mass unit
In a photoelectric experiment, light with a wavelength of 250 nm hits a certain material. When a negative potential of 0.48 volt is applied there is no more current while a saturation current Is is recorded at positive voltages.
Laser light of wavelength 633 nm is incident upon two narrow slits separated by 0.15 mm. how far apart are the interference fringes
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