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When a banjo string is under a tension of 200N it is tuned to a frequency of 523 Hz. find the frequency if the tension is reduced to 196N.
the overhead cable for a street trolley is strung horizontally 5 m above the ground. What is the magnetic field at street level directly under the cable
A spring with spring constant 15N/m hangs from the ceiling. A ball is attached to the spring and allowed to come to rest. What is its the mass of the ball
question a 1.3-nf capacitor charged to 90.0 v and a 7.5-nf capacitor charged to 40.0 v are connected with the negative
A small ball is attached to one end of a spring that has an unstrained length of 0.179 m. By how much would the spring stretch if it were attached to the ceiling and the ball allowed to hang straight down
question a baseball thrown at a angle of 40.0 degrees above the horizontal at 15.0 ms from the top of a vertical cliff
The coefficient of performance of a refrigerator is defined as the ratio of heat extracted from the refrigeration compartment to the work required to operate the refrigerator
A parachutist with a camera descends in free fall at a speed of 11 m/s. The parachutist releases the camera at an altitude of 100 m. How long does it take the camera to reach the ground
An electron is released a shortdistance above Earth's surface. A secondelectron directly below it exerts an electrostaticforce on the first electron just great enoughto cancel the gravitational force onit. How far below the first electronis the sec..
A driver travels 10 km east, 20 km north and 50 km in a direction 30 degrees south of west. What is the drivers average velocity if the trip takes 90 minutes
a system is devised to exert a constant force of 8 n on an 80-kg body of mass initially at rest. the force pushes the
Using a Time Domain Reflectometry (TDR) probe (rod length 30 cm) to estimate the soil water content of a wet sandy loam soil. alculate the volumetric wetness of the soil using the Topp and Davis (1985) equations
A spacecraft has a nonrelativistic (or classical) momentum whose magnitude is 1.3e14 kg · m/s. Find the relativistic momentum of the spacecraft
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