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A precision-drilled hole in a brass plate has a diameter of 1.2000 cm at 20°C. What is the diameter of the hole when the plate is heated to 220°C if the coefficient of thermal linear expansion for brass is 19 × 10–6 K–1?
The four strings pass over the bridge of a violin, as shown below. The strings make and angle of 72.0° with the normal to the plane of the instrument on either side of the bridge. Determine the tension in the strings
A 56-? loudspeaker, a 8.9-? loudspeaker, and a 2.3-? loudspeaker are connected in parallel across the terminals of an amplifier. Determine the equivalent resistance of the three speakers
The 4.83- kg weight that drives the time mechanism of a grandfather clock descends 27 cm in exactly 24 hours.
A tether ball of mass 0.40 kg is attached to a vertical pole by a cord 1.5 m long. Assume the cord attaches to the center of the ball. The cord makes an angle of 20° with the vertical. (a) What is the tension in the cord? . N (b) What is the speed of..
An automobile starter motor will draw 180A from the 12V battery of a car for perhaps 2 seconds in the process of starting the gasoline engine. How much power does it use
A system of two paint buckets connected by a light weight rope isreleased from rest with the 12.0-kg bucket 2.00m above the floor. find the speed withwhich this bucket strikes the floor
Block A has a mass of 3.00 kg and rests on a smooth table and is connected to the block B which has a mass of 2.00 kg after passing over an ideal pulley Block B is released from rest. How long does it take Block B to travel 80 cm
A fisherman reels in 15.0 of line while landing a fish, using the constant forward pull of 35.0. How much work does the tension in the line do on fish.
Mary needs to row her boat across a 100-{rm m}-wide river that is flowing to the east at a speed of 1- {rm m/s}. Mary can row the boat with a speed of 2- {rm m/s} relative to the water.
how much energy in j is dissipated as heat during a 2 minute time interval by a 1.5 kilo ohm resistor that has a
In heavy rush-hour traffic you drive in a straight line at 12 m/s for 1.5 minutes, then you have to stop for 3.5 minutes, and finally you drive at 15 m/s for another 2.5 minutes. compute the average velocity between t=0 and t=7.5 minutes.
a cylinder contains 4.56 mol of helium gas at a temperature of 310 k. the molar specific heat of helium at con- stant
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