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1. A high-speed drill reaches 2500 rpm in 0.60 s .
A.) What is the drill's angular acceleration?
B.) Through how many revolutions does it turn during this first 0.60 s ?
2. Consider a current-carrying conductor of length L placed in a uniform magnetic field of strength B. Derive the force experienced by the conductor.
3. An 4.0-cm-tall object is 25.0 cm in front of a concave mirror with a focal length of 20 cm. Determine the position of the image. What is the magnification? What is the image size?
4.Find the capacitance of a parallel -plate capacitor with area 23 cm^2, separation distance 0.95 mm, and dielectric with constant 2.5. Use Epsilon 0 = 8.85 x 10^-12 C^2/N X M^2.
What is the drag force exerted on a runner running at a 7min/mi pace (3.83 m/s) on a day with no wind? Suppose a coefficient of drag of 0.8, an air density of 1.204 kg/m3, and a frontal surface area of 1.0m2.
a bolt comes loose from underneath an elevator that is moving upward at a speed of 4.5 ms. the bolt reaches the bottom
An object is moving with a constant velocity V1=2i+4j for 5 seconds. It then moves with a constant velocity of V2=-3i=2j for 10 seconds, determine the final velocity vector
A "85 watt" light bulb uses anaverage power of 85 W when connectedto an rms voltage of 120 V. What is the maximum current in the bulb
A 9.6-cm-diameter circular loop of wire is in a 1.10-T magnetic field. The loop is removed from the field in 0.15 s. What is the average induced emf
imagine 1.0 stock tank barrel oil and 1000 scf gas that have been produced were somehow put back to reservoir at certain condition of pressure, what is the oil formation and solution gas oil ratio
A torque of 14Nm is applied to a heavy wheel whose moment of inertia is 34 kgm2. What is the angular acceleration of the wheel
The intensity of the sunlight that reaches Earth's upper atmosphere is approximately 1335 W/m2. What is the average energy density
A 26 kg gun is standing on a frictionless surface. The gun fires a 55.2 g bullet with a nmuzzle velocity of 320 m/s. Calculate the momentum of the gun immediately after the gun wasfired
A 99.5 kg horizontal circular platform rotates freely with no frictions about its center at an initial angular velocity of 1.77 rad/s. Find the angular velocity of the platform with its load
A farsighted woman breaks her current eyeglasses and is using an old pair whose refractive power is 1.658 diopters. Since these eyeglasses do not completely correct her vision, she must hold a newspaper 41.3 cm from her eyes in order to read it.
The angular velocity of the rotor changes from ω0=300rad/s to ω1=150 rad/s'> in a time interval Δt1=2.0 minute'> as the rotor slows to rest at constant acceleration. Find how many revolutions do the blades make in coming to rest from the initial ve..
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