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Part A What is the potential difference between xi=2.0m and xf=3.0m? Express your answer to two significant figures and include the appropriate units.
A uniform, 257-{\rm N} rod that is 2.05 {\rm m} long carries a 225-{\rm N} weight at its right end and an unknown weight W toward the left end, how far must the fulcrum be moved to restore balance
An ideal (Carnot) engine has an efficiency of 43 percent. If it were possible to run it backward as a heat pump. Compute what would be its coefficient of performance
A pebble is thrown vertically upward at a speed of 29.90 m/s at time t=0. A second pebble is thrown upward with the similar speed 2.070 sec later. Determine at what height do the two pebbles pass each other
A river 18.0m wide and 4.0m deep drains a 3000.0km2 land area in which the average precipitation is 48cm/year. What is the average speed of the river
you drive due east at 85km/h for 50min. then you follow a road going 60 degrees south of east, going 90km/h for another 30min. Find your total displacement
A step-down transformer is used for recharging the batteries of portable electronic devices. Find the power delivered to the DVD player
The magnetic force isalways perpendicular to both the magnetic field and the velocity ofthe charge. Magnetic fields don't doany work on charges. Magnetic fields arecreated by moving charges. Magnetic fields deflectmoving charges.
An MP3 player operates with a voltage of 3.7 V, and is using 0.21 W of power. Find the current being supplied by the player's battery
A certain type of laser emits light that has a frequency of 5.7 1014 Hz. How many wavelengths are there in one pulse
A child on a merry-go-round takes 4.6s to go around once. What is his angular displacement during a 1.0 s time interval
grains of fine california beach sand are approximately spheres with an average radius of 50 mum and are made of silicon
A cube of edge length l = 3.80 cm is positioned as shown in Figure P30.35. A uniform magnetic field given by B = (5.50 i + 4.00 j + 3.00 k) T , Calculate the flux through the shaded face
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