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Q1. An iron bolt of mass 63.4 g hangs from a string 32.6 cm long. The top end of the string is fixed. Without touching it, the magnet attracts the bolt so that it remains stationary, displaced horizontally 28.5 cm to the right from the before vertical line of the string. Find the tension in the string. Find the magnetic force on the bolt.
Q2. An airplane must reach a speed of 190 mi/h to take off. If the runway is 466 m long, what is the minimum value of an acceleration that will allow the airplane to take off successfully?
What is corresponding free energy change
Estimation instantaneous rate of evaporation
A converging lens has a focal length of f = 26 cm. An object is placed 39 cm from the lens. Find out the size of an image in cm if the object has a height of 5 cm. express answer with one decimal place.
What is the potential energy of the elevator
If the orientation of the spacecraft is to be changed by 30.0°, for what time interval must the gyroscope be operated.
A 790-kg object and an 889-kg object are separated by 11.0 m. At what position (from the less massive object) can the 260-kg object be placed so as to experience a net force of 10 N towards the less massive object.
Find an expression for work done by the gas
A crate with mass 35.5 initially at rest on a warehouse floor is acted on by a net horizontal force of 120. What acceleration is produced.
The coefficient of kinetic friction between block and ramp
Find out the gravitational potential energy
An object with a net charge of 44 µC is placed in a uniform electric ?eld of 554 N/C, directed vertically. The acceleration of gravity is 9.81 m/s^2. What is the mass of this object if it ?oats in this electric ?eld?
The K-shell ionization energy of copper is 8979 eV. The L-shell ionization energy is 951 eV. Determine the wavelength of the Kα emission line of copper. What should be the minimum voltage be on an x-ray tube with a copper target in order to see the K..
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