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An iron bolt is used to connect two iron plates together. Thebolt must withstand shear forces up to about 3150 N. Calculate the minimum diameter for thebolt, based on a safety factor of 6.1.
cm
A very short solenoid contains N = 20 circular loops of wire. what is the magnetic field in the center of the solenoid
The moon orbits the earth at a distance of 3.85 x 10^8 m.Assume that this distance is between the centers of the earth andthe moon and that the mass of the earth is 5.98 x 10^24 kg. Find the period (in days) for the moon’s motion around the earth.
A thick spherical shell of charge Q and uniform volume charge density ? is bounded by radii r1 and r2, where r2 > r1. With V = 0 at infinity, find the electric potential V as a function of the distance r from the center of the distribution, consid..
If the wavelength of a maximum intensity decreases from 1840nm to 1560nm as the bulb's voltage is increased, by how many celcius does the filament temperature increase
A skydiver jumps out of a plane and reaches her terminal speed of120 mph after falling for 15 s. How fast will the skydiver be going28.4 s later at the moment she pullsthe ripcord? (The parachute hasn't deployed yet)
A small flywheel starts from rest and spins up to speed in 10 seconds. During this time it completes a total of 300 revolutions. what is the angular acceleration of the wheel
A 5.3kg box is on a frictionless 36^\circ slope and is connected via a massless string over a massless, frictionless pulley to a hanging 1.6kg weight. A- What is the tension in the string if the 5.3kg box is held in place, so that it cannot move? B- ..
question1illustration on eratosthenes process if two observers are due north and south of each other and are detached
An automobile accelerates from rest at 20 m/s2 for 20 s. The speed is held constant for 20 s, after which there is acceleration of ( -3 m/s2 ) until the automobile stops. What is the total distance traveled?
An electron is released from rest at the negative plate of a parallel plate capacitor. How fast is the electron moving just before it reaches the positive plate
A cockroach of mass m lies on the rim of a uniform disk of mass 7.00 m that can rotate freely about its center like the merry-go-round. At first the cockroach and disk rotate together with an angular velocity of 0.220 rad/s. Then the cockroach walks ..
A 2 kg mass is placed at rest against a spring of spring constant 5 N/m, which is compressed by 10 cm from its equilibrium position. compute the amount of potential energy stored in the spring
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