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A steel cable is stretched across a gorge. The cable is 190 m long and has a mass of 44 kg. When one end of the cable is struck with a hammer, a wave pulse travels down the cable, reflects at the far end, and is detected back at the first end 14 s later. What is the speed of the wave?
A particle that has an 8.2- micro-coulomb charge moves with a velocity of magnitude 5.0 x 10^5 m/s along the +x-axis . It experiences no magnetic force , although there is a magnetic field present
A 2400 kg satellite is in a circular orbit around a planet. The satellite travels with a constant speed of 6.67X10^3 m/s. What is the acceleration of the satellite
A plastic rod is rubbed against a wool shirt, How many electrons are transferred from the wool shirt to the plastic rod? The elemental charge is 1.6 × 10?19 C
A .4 kg ball has a velocity of 25 m/s, what is the kinetic energy of the ball & how much work would be required to stop the ball
A 60-kg bungee jumper has fallen far enough that her bungee cord is beginning to stretch and resist herdownward motion. Find the force (magnitude and direction) exertedon her by the bungee cord at an instant when her downwardacceleration has a mag..
a capacitor with a capacitive reactance of is connected in series with a 100 resistor across in ac source of frequency 60.0hz. what is the phase angle
Find out the net force exerted on the fluid inside the box by summing momentum flow rates out through each of four sides of the box.
An alert physics student stands beside the tracks as a train rolls slowly past. calculate the speed of the train
a 200-O resistor, a 40.0-mH inductor and a 2.00 uF capacitor are connected in series with a 120-V rms source at 1000 Hz. What is the phase angle of this circuit
A copper-constantan thermocouple generates a voltage of 5.03 10-3 volts when the temperature of the hot junction is 121.0° C, what is the temperature of the hot junction
A child throws a stone from the top of a 15 m cliff with a speed of 20 m/s. find its kinetic energy and speed when it lands on the ground
A 20-kg child swings back and forth on a swing such that her height h in m from the ground as a function of x is described by: h(x) = 0.5 + 0.45x2 for -1.2 m ? x ? 1.2 m, What is the maximum potential energy of the child
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