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A rock group is playing in a bar. Sound emerging from the door spreads uniformly in all directions. The intensity level of the music is 114 dB at a distance of 2.9 m from the door.
At what distance is the music just barely audible to a person with a normal threshold of hearing? Disregard absorption.
An ordinary glass is filled to the brim with 334.0 mL of water at 100°C. If the temperature decreased to 12°C, how much water could be added to the glass
a cylindrical resistor of length l 2 cm is constructed from an inner cylindrical core of radius r1 3.0 mm made from
An electric field given by = 6.0· - 3.9(y2 + 3.5)· pierces a Gaussian cube of edge length 3.2 m and positioned as shown in Fig. 23-56. (The magnitude is in newtons per coulomb and the position x is in meters.) What net charge (in Coulombs) is enclose..
A beam of electrons is incident on two slits separated by a distance of 2.0E-6m. Calculate the kinetic energy of the electrons
A capacitor with an initial potential difference of 100 V isdischarged through a resistor when a switch between them is closedat t = 0. What is the time constant of the circuit
A 6000kg truck stands on the deck of an 80000kf ferryboat. Initially the ferry is at rest and the truck is located at its front end. how far will the ferry move forward relative to the water
Only two forces act on an object (mass=3.76 kg), as in the drawing. Find the direction (relative to the x axis) of the acceleration of the object
A 73.0 kg construction worker stands at the far end of the beam.What is the magnitude of the torque about the point where the beam is bolted into place .
A sample of ore containing radioactive strontium9038Sr has an activity of 7.6 x 105 Bq. How many grams of strontiumare in the sample
Three capacitors (3.81, 5.89, and 11.3 ?F) are connected in series across a 45.0 V battery. Calculate the voltage across the 3.81 F capacitor?
Starting from rest, the elevator accelerates upward. During the acceleration, the hoisting cable applies a force of 9300 N. Illustrate what does the scale read during the acceleration?
An archer shoots an arrow with a velocity of 30 m/s at an angle of 20 degrees with respect to the horizontal. What is the initial speed of the apple
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