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In a game of lawn chess, where pieces are moved between the centers of squares that are each 1.61 m on edge, a knight is moved in the following way: (1) two squares forward, one square rightward; (2) two squares leftward, one square forward; (3) two squares forward, one square leftward. What are (a) the magnitude and (b) the angle (relative to "forward", "left of forward" is the positive direction) of the knight's overall displacement for the series of three moves?
A ball is hung from a rope, making a pendulum when it is pulled 5 degrees to the side, the restoring force is 1.0 N. What will be the magnitude of the restoring force if the ball is pulled 10 degree to the side?
A diverging lens has a focal length of 40.7 cm. If an object is 31 cm from the lens, what is the image distance? Answer in units of cm. Also, What is the magnitude of the magnification for this lens?
a proton has a speed 4.5*10^5 m/s at a point where electrical potential is 900V. it moves through a point where the electric potential is 500V. find the kenetic energy of proton at first point
a pair of narrow parallel slits separated by a distance of 0.294 mm are illuminated by the green component from a
A 15 V constant voltage battery is connected to 120 kΩ resistor, How many electrons pass through the resistor
A 4mm diameter circular coil of 25 turns and total resistance 0.001O lies in the x-y plane at a distance of 3m from a long straight current-carrying wire along the x-axis. If the current in the wire is increasing at a rate of 0.2 A/s,
a massive ring radius a and mass m lies on the xy plane. calculate the force f on a test mass m at position z on
a glass windowpane in a home is 0.62 cm thick and has dimensions of 0.8 m 1.9 m. on a certain day the indoor
A wooden raft has a mass of 65 kg. When empty it floats in water (density 1000 kg/m3) with 41percent of its volume submerged. What mass of sand can be put on the raft without it sinking.
A group of hikers hears an echo 5 s after shouting. If the temperature is 16.0°C, how far away is the mountain that reflected the sound wave.
The minimum distance required to stop a car moving at 36.0 mi/h is 48 ft. What is the minimum stopping distance for the same car moving at 70.0 mi/h, assuming same rate of acceleration.
A kid fires water horizontally from a squirt gun held 1.6 above the ground. It hits other kid 2.4 away squares in the back, at a point 0.85 above the ground. What was the initial speed of the water.
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