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A No. 207 radial-contact ball bearing supports a shaft that rotates 1800 rpm. A radial load varies in such a way that 60, 30, and 10 percent of the time the load is 3, 5, and 7 kN, respectively. The loads are uniform, so that Ka = 1. Estimate the L10 life and the median life of the bearing.
questiona student standing on a stationary skateboard tosses a textbook with a mass of mb 1.55 kg to friend standing
The electric field in a region of space has the components Ey = Ez = 0 and Ex = (5.90 N/(C·m))x. Point A is on the y axis at y = 4.30 m, What is the potential difference (in V) VB - VA
In a circus performance, a monkey is strapped to a sled and bothare given an initial speed of 5.0 m/sup a 25.0° inclined track. The combined mass of monkeyand sled is 24 kg, and the coefficient of kinetic friction between sled and incline is 0.20.
a high speed cooling fan has a maximum angular speed of 15.0 rad/sec, calculate the angular acceleration when the device goes from idle speed to operational speed
A device called a velocity selector is a tube with a crossed electric and magnetic fields set up so that the particle entering with a velocity v_0 along the axis of the tube experiences zero net force.
A 1.63 kg block of ice is sliding by you on a very slippery floor at m/s. As it goes by, you give it a kick perpendicular to its path. Your foot is in contact with ice block for 0.005 seconds. The block eventually slides at the angle of 24 degre..
0.80 m and the mass of the particle the bob at the end of the cable is 0.24 kg. the pendulum is pulled away from its
A satellite is sent to planet Zog and when it lands you measure that the oscillation frequency of the pendulum is 2.5 times larger on Zog than on earth. Other measurements indicate that the radius of Zog is 0.8xRE ( the radius of earth). What is t..
Determine the enthalpy change and internal energy change of ammonia in J/mole, as it is heated from 350 K to 600 K, using the ideal gas heat capacity given by the Shomate Equation.
Sam, whose mass is 75 kg, takes off across level snow on his jet-powered skis. The skis have a thrust of 200 N and a coefficient of kinetic friction on snow of 0.1. Unfortunately, the skis run out of fuel after only 10 s. What is Sam's top speed? ..
A sound wave with an intensity level of 81.0 dB is incident on an eardrum of area0.600 10-4 m2. How much energy is absorbed by the eardrum in 4.0 minutes
A closed system is observed to have 51objects in it. Initially, the total energy of the system is 6024 J. After 8.8 hour has passed, calculate how much total energy will the system contain
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