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In February 1955, a paratrooper fell 1200 ft from an airplanewithout being able to open his chute but happened to land in snow,suffering only minor injuries. Assume that his speed at impact was56 m/s (terminal speed0, that his mass (including gear) was 85 kg,and that the force on him from the snow was at the survivable limitof 1.2 X 10 ^ 5 N. What is the minimum depth of snow that wouldhave stopped him safely?
A playground is on the flat roof of a city school, 5.3 m above the street below, Find the vertical distance by which the ball clears the wall
Water moves through a constricted pipe in steady, ideal flow. At the lower point shown in the figure below, the pressure is P1 = 2.00 104 Pa, Find the speed of flow in the upper section
A projectile is shot vertically from the surface of the Earth. Calculate the final speed of the projectile
A satellite is in a circular orbit around the earth. The period of the satellite is 22 hr.
Does an apple tree exert a gravitational force on the earth and if so, how large of a force, Consider and explain this question when the apple is attached to the tree
A grasshopper makes four jumps. The displacement vectors are (1) 25 cm, due west; (2) 23.5 cm, 50° south of west; (3) 24.5 cm, 56° south of east; and (4) 36 cm, 43° north of east. Find the magnitude and direction of the resultant displacement. Expres..
A constant force of 25N acts on an object having a mass of 2kg for 3 seconds. What is the magnitude of the change in the object's momentum
A proton and an electron have the same kinetic energy upon entering a region of constant magnetic field. What is the ratio of the radii of their circular paths
A microscope has a 12.0 x eyepiece and a 59.0 objective lens 20.0 cm apart. Calculate (a) the total magnification, (b) the focal length of each lens, and (c) where the object must be for a normal relaxed eye to see it in focus?
Interpreting attenuation as a reflection loss calculate the lower limit to the effective reflectivity at the core cladding boundary
Some rear view mirrors produce images of cars behind you that are smaller than they would be if the mirror were flat. What is the mirrors radius of curvature if cars 25.0 m away appear 0.33 times their normal size?
A small droplet of oil with mass of 4.81×10-15 kg is held suspended in a region of uniform electric field directed upward with a magnitude of 7025 N/C
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