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An 90.0 kg skydiver jumps out of a balloon at an altitude of 1 180 m and opens the parachute at an altitude of 175m.
(a) Assuming that the total retarding force on the diver is constant at 65.0 N with the parachute closed and constant at 3 600 N with the parachute open, what is the speed of the diver when he lands on the ground?
(c) At what height should the parachute be opened so that the final speed of the skydiver when he hits the ground is 5.00 m/s?
Nichrome wire of cross-sectional radius 0.758 mm is to be used in winding a heating coil. find the length of wire you must use to wind the coil
In an experiment like you are going to do in Investigation 1 of lab this week, you count the number of beta rays from a 137Cs source. What is the average number of counts
On a clear day at a certain location, a 123-V/m vertical electric field exists near the Earth's surface. Compute the energy density of the magnetic field
A 1.8 kg ball of putty moving to the right has a head-on inelastic collision with the .50 kg putty ball moving to the left. If the combined blob doesn't move just after the collision, what can you end about the relative speeds of the balls before the..
Two identical spacecraft are to be accelerated by rockets. The first rocket fires with a force 4 times as large as that of the second rocket. The acceleration of the first rocket is how many times as vast as the acceleration of the second rocket.
While working on the new Science building, the construction crew uses a bulldozer to push a large boulder across the site at a constant speed over a distance of 82.0 m. determine the amount of work done by all of the forces acting on the boulder
A physics student in a hot air balloon ascends vertically at constant speed. suppose the following four forces that arise in this situation.
Determine the work done on the box by each of the four forces that act on the box. Be sure to include the proper plus or minus sign for the work completed by each force.
An electromagnetic wave with frequency 56.0 Hz travels in an insulating magnetic material that has dielectric constant 3.72, What is the amplitude of the magnetic field?
Two capacitors (C1 = 7.9 uF, C2 = 15.7 uF) are charged individually to (V1 = 15.7 V, V2 = 4.5 V). Calculate the final potential difference across the plates of the capacitors once they are connected
You are given a pair of Hemholtz coils, each with radius R = 12 cm, containing 140 turns of wire in each coil. Calculate the magnetic field produced in the center of the space between the coils
A steel aircraft carrier is 379 m long when moving through the icy North Atlantic at a temperature of 1.8 °C. By how much does the carrier lengthen while it is travelling in the warm Mediterranean Sea at a temperature of 24°C.
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