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A 80 kg skydiver can be modeled as a rectangular "box" with dimensions 23 cm×45cm×1.8m. What is his terminal speed if he falls feet first? Suppose that the density of air is 1.2 kg/m^3?
What is the potential 0.530×10–10 m from a proton (the average distance between the electron and proton in a hydrogen atom)?
A mass of 6.70 kg is suspended from a 1.15 m long string. It revolves in a horizontal circle, Calculate the angle between the string and the vertical
Two football players go to kick a ball at the same time. One kicks it with a velocity of 25ms-1 at an angle of 12o to the horizontal, What is the resultant velocity of the bal
q1. explain what causes the seasons that we experience in the temperate region of the northern hemisphere. do you have
The motion of a very massive object can be minimally affected by what would seem to be a substantial force. how long will it take the tanker, starting from rest, to reach a typical cruising speed of 6.0 m/s
An observer, whose eyes are 1.77 m above the ground, is standing 28.0 m away from a tree. The ground is level, and the tree is growing perpendicular to it. The observer's line of sight with treetop makes an angle of 22.0° above the horizontal. How..
Find the time period of oscillation of the plate if it is slightly displaced along its length and released.
A pulley, with a rotational inertia of3.2×10-3 kg m2 about its axleand a radius of 6.0 cm, is acted on by a force appliedtangentially at its rim. The force magnitude varies in time as F =0.58t + 0.24t2, where F is in newtons if t is given insecond..
A certain satellite travels in an approximately circular orbit of radius 9.1 × 106 m with a period of 8 h 39 min. Calculate the mass of its planet from this information
q1. air is flowing through a rocket nozzle. inside the rocket the air has a density of 5.25kgm3 and a speed of 1.2 ms.
A 140 g, 90.0 mph fastball comes across the plate very nearly horizontally and is batted at 90.0 mph at a 30.0 degree angle (above the horizontal) toward center field. Determine the impulse (in N's) acting on the ball
particles of charge 150 - 76 and 32 mc are on one line. the negative one is in the center 55 mm from each of the other
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