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A charge q= 4.0 μC is moved 0.25 meter horizontally from the origin to point P in a region where an electric field is 150 V/m and directed vertically. Find the change in the electric potential energy of the charge?
A 2.25×104 N elevator is to be accelerated upward by connecting it to a counterweight using alight (but strong!) cable passing over a solid uniform disk-shaped pulley, Determine how heavy should the counterweight be
Calculate the velocity of the object for an elapsed time of t=1s. Use the formula v=v0+at, these use the v0,and the value for acceleration you determined in previouse step. PROBLEM:V=Vo+at Vo is 3.8 m/s a=1.2m/s^2
The New River Gorge bridge in West Virginia is a 522 m long steel arch. How much will its length change between temperature extremes -19.4oC and 35.5oC
On aircraft carriers, catapults are used to accelerate jet aircraft to flight speeds in a short distance. How far does the jet travel while it is accelerating
A 61.0kg skater moving initially at 3.78m/s on rough horizontal ice comes to rest uniformly in 3.24s due to friction from the ice
what would the period of the system be. When a particular mass-spring system is started by stretching the spring 5 cm, one complete oscillation takes 2 seconds.
Tim and Rick both can run at speed v_r and walk at speed v_w, with v_{rm r} > v_{rm w}. They set off together on a journey of distance D. Rick walks half of the distance and runs the other half. Tim walks half of the time and runs other half.
A water pipe having a 2.9 cm inside diameter carries water into the basement of a house at a speed of 0.87 m/s and a pressure of 174 kPa, What is the speed and water pressure at the second floor
An ore sample weighs 17.50 in air. When the sample is suspended by alight cord and totally immersed in water, the tension in the cord is11.20 Newton. Find what is the density of the sample
How does hydrogen bonding affect large molecules like proteins? What shapes do proteins take because of this effect?
A closely wound circular coil with a diameter of 3.60 cm has 560 turnsand carries a current of 0.560 A. What is the magnitude of the magnetic fieldat the center of the coil?
A 300kg ball with a speedof 6.0 m/s strikes a wall at an angleof 30degrees and then rebounds with the same angle and speed. What is the impulse on the ball from the wall
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