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An airplane flies 422 km in a straight line at an angle of 73.0 degrees south of east. It then changes direction and flies 229 km in a straight line at an angle of 22.4 degrees north of west. Find the resultant displacement of the airplane for the entire trip (magnitude and direction).
An elevator releases 11200J of gravitational potential energy as descending 4m between floors. How much does elevator weigh.
A modern microscope is equipped with a turret that has three objectives with focal lengths of 16 mm, 4.0 mm, and 1.6 mm, What are the greatest and least magnifications possible
A transformer with a turns ratio (secondary/primary) of 1:15 is used to step down the voltage from a 120-V wall socket to be used in a battery recharging unit
You fire a gun horizontally that is 25m off the ground and the bullet goes at 200m/s. What is the time it takes for the bullet to hit ground, how far down range does bullet travel, and what is the resultant velocity (in m/s) and final angle.
Two friends, Barbara and Neil, are out rollerblading. With respect to the ground, Barbara is skating due south at a speed of 2.7 m/s. Neil is in front of her.
You are to drive to an interview in another town, at a distance of 300 km on an expressway. The interview is at 11:15 a.m. You plan to drive at 100 km/h, so you leave at 8:00 a.m. to allow some extra time. You drive at that speed for the first 110..
The pilot of an airplane notes that the compass indicates a heading of due west. find direction (measured from west) of the velocity of the plane relative to the ground
An LRC circuit is connected to a 12.0-kHz , 745-V (rms) source, L = 28.0mH , R = 8.80k? , and C = 6350pF, Determine the total impedance
a stone with a mass of 95 g is being whirled in a horizontal circle on the end of a string that is 85 cm long. what is the angle that the string makes with the horizontal
You are in a hot air balloon (yes, another balloon problem!) rising from the ground at a constant velocity of 2.70 m/s upward. How long does the cork remain in the air
We are not normally aware of the gravitational or electric force between two ordinary objects. What is the reason in each case? Give an example where we are aware of each one and why.
What is the magnitude of the electric force between a proton and an electron when they are at a distance of 1.91 angstrom from each other
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