What will the sound level be

Reference no: EM13309160

At a distance of 20m from a source of sound, the sound level is 40 dB. If the observer backs up to a distance of 40 m from the source, what will the sound level be? (Assume no absorption nor reflection of sound.)

Reference no: EM13309160

Questions Cloud

Calculate its moment of inertia about its center : A grinding wheel is a uniform cylinder with a radius of 8.5 cm and a mass of .580 kg. Calculate its moment of inertia about its center

Find the maximum value of the emf induced in the coil : A circular conducting loop of 100 turns and radius 14 cm spins at 1000 rpm about an axis along its diameter, Find the maximum value of the e.m.f induced in the coil

Find the magnitude of the force on each wire : Three parallel wires 8.0 m long carry each 20 A of current in the same direction. Find the magnitude of the force on each wire

Find the force on window due to difference in air pressure : A hurricane-force wind of 220 blows across the face of a storefront window. Estimate the force on the 2.2 3.5 window due to the difference in air pressure

What will the sound level be : At a distance of 20m from a source of sound, the sound level is 40 dB. what will the sound level be

Assume thermal neutrons-natural uranium : Compute extrapolated length characterizing water, graphite, and natural uranium (assume thermal neutrons

Compute the average force produced by the gasoline : One gallon of gasoline contains 3.1 multiply.gif 107 calories of potential energy that are released during combustion. what is the average force produced by the gasoline

Governmental role in healthcare quality and risk management : Analyze the governmental role in healthcare quality and risk management. Examine if Medicare, and CMS, are leaders or followers in the delivery of high quality healthcare in this country.

Born-mayer-huggins form of the potential energy : Using the Born-Mayer-Huggins form of the potential energy, calculate the lattice energy v(r_0) for Ba0 (Rocksalt crystal structure) using only nearest neighbor repulsions. Given the equilibrium constant (separation) r_0=2.77 angstrom.

User Account

All Pages