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With respect to the earth, object 1 is moving at speed 0.90c to the right. Object 2 is moving in the similar direction at speed 0.70c with respect to object 1. Determine how fast is object 2 moving with respect to the earth?
You are 1.9 m tall and stand 3.4 m from a plane mirror that extends vertically upward from the floor. What is the minimum height the mirror must have
A uniform 1.2-kg rod that is0.73 m long is suspended at rest from the ceiling by two springs, one at each end of the rod. Both springs hang straight down from the ceiling. The springs have identical lengths when they are unscratched. Their spring con..
A two-slit pattern is viewed on a screen 1.25 m from the slits. If the two third-order minima are 29.0 cm apart, what is the width of the central bright fringe? (This is the distance between the nearest minima which bracket the central fringe.)
A student drops two metallic objects into a 120 g steel container holding 150 g of water at 25°C. One object is a 230 g cube of copper that is initially at 85°C, and the other is a chunk of aluminium that is initially at 5.0°C. To the surprise of the..
An infinitely long charged wire produces an electric field of magnitude 1.17 103 N/C at a distance of 46.4 cm perpendicular to the wire. The direction of the electric field is toward the wire. (a) What is the charge distribution? (b) How many electro..
The "reaction time" of the average automobile driver is about 0.7s. Compute the total distance covered in coming to a stop after a signal is observed from an initial velocity of 12.0
A cylinder 0.150 in diameter rotates in a lathe at 620. What is the tangential speed of the surface of the cylinder
An oscillator with a mass of 500 g and a period of 0.50s has an amplitude that decreases by 1.0% each complete oscillation. If the initial amplitude is 20 cm, what will be the amplitude after 21 oscillations?
the plates of a fabry-perot interferometer are coated with silver of such a thickness that for each plate the
An object's terminal velocity is 52.135 m/s on a dry day (when the density of air is 1.21356 kg/m^3. What is the density of the humid air
two tiny conducting spheres are identical and carry charges of -20.2c and 54.8c. they are separated by a distance of
In some places, insect "zappers," with their blue lights, are a familiar sight on a summer's night. how many turns are in the secondary coil
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