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A 4.0-m-long iron bar of uniform cross section is held perpendicular to the wall by a wire from the end of the bar to the wall. If the iron bar weighs 754 N and the wire is 5.0 m long, what is the magnitude of the horizontal component of force produced by the wall?
In a period of 1 s, 4.00 x10^23 nitrogen molecules strike a wall with an area of 6.30 cm2. If the molecules move with a speed of 300 m/s and strike wall head-on in elastic impacts, what is the pressure exerted on the wall? (The mass of one N2 mole..
A highway is to be built between two towns, one of which lies 36.0 km south and 88.0 km west of the other. What is the shortest length of highway that can be built between the two towns, and at what angle would this highway be directed? length km..
A carbon nanopaeticle contains 7000 carbon atoms. According to the Einstein model of a solid, how many oscillators are in this block
A tiny sphere with a charge of q = +6.4 µC is attached to a spring. Two other tiny charged spheres, each with a charge of ?4.0-µC, are placed in the positions shown in the figure, in which b = 4.1 cm.
A cannon shoots a cannonball from the ground level (ignore the height of the cannon) to the top edge of a cliff that is 135m high. What will be the speed of the ball when it hits the cliff
Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 2.10×106N , one at an angle 10.0? west of north, What is the total work done by the two tugboats on the supertanker
Each of three tuning forks, A, B, and C, has a slightly different frequency. What is the smallest possible beat frequency when B and C are sounded together
Calculating magnetic flux, induced current & magnetic field.
What is the friction force that acts on the firefighter. find Max wavelength and Min wavelength.
An oil layer floats on 85 cm of water in a tank. The absolute pressure at the bottom of the tank is 112.0 kPa. How thick is the oil
Three equal charges of magnitude +4.00 uC are placed at the corners of an equilateral triangle of side 2 cm. what is the electric potential energy of the system
A 150. W lamp is placed into a 120. V AC outlet. What are the peak and rms currents and What is the resistance of the lamp
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