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You are standing in the middle of a large room listening to a cacaphony of sounds. Rank the intensity of the sounds from each source (1=loudest, 2= next loudest, ...) Consider all objects to be right next to you. If two values are within 0.1 dB from each other, consider them to be the same.
1. An object emitting a sound with an intensity of 1.0×10-9 W/m2.
2. Two buzzers each producing a sound with intensity level of 50 dB.
3. An object emitting a sound with an intensity level of 60 dB.
4. An object emitting a sound with an intensity level of 80dB.
5. 100 buzzers each producing a sound with intensity level of 30 dB.
A 50kg trunk is pushed 6.0 m at a constant speed up a 30degree incline by a constant horizontal force. How much energy was dissipated by the frictional force acting on the trunk
The primary of a step-down transformer has 290 turns and is connected to a 120 V rms line. The secondary is to supply 17 A at 7 V. Find the number of turns in the secondary, assuming 100% efficiency
A 0.59-kg object connected to a light spring with a force constant of 24.0 N/m oscillates on a frictionless horizontal surface. Determine the maximum speed of the object
A battery with an emf of 12.0 V shows a terminal voltage of 11.0V when operating in a circuit with two light bulbs rated at 3.0 W (at 12.0 V) which are connected in parallel. What is the battery internal resistance
an audience of 1800 fills a concert hall of volume 2.2times104 m3.if there were no ventilation by how much would the
A man drops a 10kg rock from the top of a ladder of height 5m. what is the speed just before it hits the ground? What is its kinetic energy when it reaches the ground?
There are four charges, each with a magnitude of 2.0μC. Two are positive and two are negative. The charges are fixedto the corners of a 0.30 m square, one to a corner, in such a waythat the net force on any charge is directed toward the center oft..
The tires on a new compact car have a diameter of 2.0 feet and are warranted for 64,000 miles. Evaluate the angle through which one of these tires will rotate during the warranty period
a what is the frequency of blue light that has a wavelength of 450 nm?b what is the frequency of red light that has a
A single electron orbits a lithium nucleus that contains three protons (+3e). The radius of the orbit is 1.76 10-11 m. Determine the kinetic energy of the electron.
Ships A and B leave port together. For the next two hours, What is the distance between the two ships two hours after they depart
a positively charged bead having a mass of 1.00 g falls from rest in a vacuum from a height of 7.50 m in a uniform
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