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A single bass amplifier produces a volume of 102 dB. What is the sound level if a guitar amplifier what produces 98 dB is played at the same time?
A string on a guitar vibrates at 420 Hz. If the tension on the string is 102 N, what is the mass of the string if the portion that vibrates is 63.7 cm long?
What was the angle of the hill. what is the current in the circuit when four lamps are turned on.
rate at which mechanical energy is transferred to the turbine blades, assuming 60 percent efficiency.
Suppose that a small incandescent light bulb (R=2.88 kilo ohms) is connected to a standard European household AC electrical socket, Find the average power dissipated by the light bulb
A flat piece of glass covers the top of a vertical cylinder that is completely filled with water, What is the smallest value of the incident angle theta_a for which none of the ray refracts into the water
When blue light with a wavelength of 471nmilluminates a diffraction grating, What is the maximum spacing between lines on this grating
A raft is made of 12 logs lashed together. Each is 28 cm in diameter and has a length of 6 m. How many people can the raft hold before they start getting their feet wet
A father (m = 90 kg) and son (m = 45 kg) are standing facing each other on a frozen pond. The son pushes on the father and finds himself moving backward at 3 m/s after they have separated. How fast is the father moving.
An 840 kg car needs to round a level curve with a radius of 23m.The driver wants to proceed at 56 kph. How much work does the friction force do on the car
assume you are standing on a train, both feet together, facing a window. The front of the train is to your left. The train starts moving forward.
What are the total displacement and angle of displacement
A 75.0 kg man stands on a bathroom scale in an elevator that accelerates upwards from rest to 30.0 m/s in 2.00 s. Calculate the scale reading compared with his weight
In open heart surgery a much smaller amount of energy will defibrillate the heart. Find the amount of stored charge
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