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The drill used by most dentists today is powered by a small air-turbine that can operate at angular speeds of 320000 rpm. These drills, along with ultrasonic dental drills, are the fastest turbines in the world - far exceeding the angular speeds of jet engines. Suppose a drill starts at rest and comes up to operating speed in 2.16 s. Calculate the angular acceleration produced by the drill, assuming it to be constant. Give answer in rev/s.
How many revolutions does the drill bit make as it comes up to speed? Do not enter unit.
An airplane is flying with a velocity of 81.6 m/s at an angle of 18.0 above the horizontal. When the plane is the distance 123 m directly above a dog that is standing on level ground, a suitcase drops out of the luggage compartment. How far from t..
The masses and coordinates of three spheres are as follows: 14 kg, x = 1.25 m, y = 1.25 m; 38 kg, x = -2.50 m, y = -2.00 m; 62 kg, x = 0.00 m, y= -0.50 m. What is the magnitude of the gravitational force
Two spheres of mass m1= 3kg and m2= 1.5 kg are given. The lighter sphere is at rest. what is the velocity of each sphere after collision
A door with width L = 1.0 m and mass M = 15 kg is hinged on one side so that it can rotate freely. What is the angular velocity of the door with respect to the hinge just after the bullets embeds itself in the door
A large tanker truck can carry 30 ton of liquid. (a) What volume of water can it carry? (b) What volume of gasoline can it carry.
Player serves a tennis ball 2.2 m above the ground. The ball leaves his racquet with a speed of 56 m/s at an angle 10 degree below the horizontal. what's the ball clea the net
A critically damped simple harmonic oscillator starts at the origin at rest, and is subject to an additional force Fext = Fto/t. Find the subsequent motion
A 10.0-ohms resistor, a 10.0-mh inductor, and a 100 uF capacitor are connected in series to 50.0-V (rms) having variable frequency. find the energy delivered to the circuit during one period
q1. ricardo and jane are standing under a tree in the middle of a pasture. an argument ensues and they walk away in
The client also says that he does not remember any Section 1231 net losses on the prior-year returns. Illustrate what should Harold do? Why?
You are part of a search-and-rescue mission that has been called out to look for a lost explorer. What minimum speed must the rocket have
q1. a .800 kg block is attached to a spring with spring constant 16.0 nm. while the block is sitting at rest a student
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