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A sound wave from a siren has an intensity of 82.2 W/m2 at a certain point, and a second sound wave from a nearby ambulance has an intensity level 8 dB greater than the siren's sound wave at the same point. Obtain the intensity level of sound wave due to ambulance?
___________dB
A tuning fork vibrates at a frequency of 520 Hz. An out-of-tune piano string vibrates at528 Hz. How much time separates successive beats
A step-up transformer has 50turns on the primary coil and 500 turns on the secondary coil. what input currentand voltage are needed
You measure an electric field of 1.37×106N/C at a distance of 0.159m from a point charge. What is the electric flux through the surface of a sphere
Small steel ball bearing with a mass of 17 g is on a short compressed spring. When aimed vertically and suddenly released, the spring sends the bearing to a height of 1.39m. Calculate the horizontal distance ball would travel if the same spring we..
A normal electric power cord consists of two parallel conductors about 4 mm apart. Estimate the magnetic field strength (in N/C) about 30 cm from a linear 25 m power cord connected to a 100 W lamp
a runner hopes to complete the 10000-m run in less than 30.0 min . after running at constant speed for exactly 27.0 min
A block of mass m = 600 g is released from rest and slides down a frictionless track of height h = 59.9 cm. What is the value of the spring constant k
the electric field caused by a certain point charge has a magnitude of 6500rm nc at a distance of 0.180rm m from the
a chain is held on a frictionless table with 1/5 of its length hanging over the edge. how much work is required to pull the hanging part back
What percentage of a photon beam would interact in passing through a 3-mm slice of absorber if the linear attenuation coefficient were 0.15/cm
A crate of mass m (=30 kg) is placed at rest on a (frictionless) inclined plane, which has an angle (= 60o) above horizontal. How long would it take the crate to slide 8 m down the incline?
when you place a saltshaker 30 cm from your magnifying glass a real image forms 30 cm from the lens on the opposite
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