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When standing a certain distance from a jet on the ground on which all three engines are running at equal power, the sound level is heard at the threshold of pain, 120dB. (A) If the pilot shuts down 2 engines however leaves the 3rd at the same power, what is the sound level that is heard? (B) When at a different distance, the same jet is heard initially at 95dB. At that point after two engines are shut off, what sound level is heard?
Determine the radius of an electron orbit when it moves perpendicular to a magnetic field of 0.50 T with a speed of 6.27 × 105 m/s
a 2 kg ball moving at 3 m/s hits a wall and bounces off. immediately after the collision it moves at 3 m/s in the opposite direction. what is the magnitude of the change in the objects momentum
The plate is a thin square of thickness t and sides d. The left half of the plate has (uniform) mass density p1 and the right half (uniform) mass density p2. Place the XY-axis with every axis parallel to the sides of the square and origin at the geom..
The intensity of sound wave A is 100 times that of sound wave B. Relative to wave B, find the sound level of wave A
Suppose you aim to suspend in air a perfectly reflecting 4cmx4cm surface, with mass m = 0.00045kg. What intensity of light must you shine on it
(a) Calculate the R-value of a thermal window made of two single panes of glass each 0.100 in. thick and separated by a 0.200-in. air space. By what factor is the transfer of energy by heat through the window reduced by using the thermal window inst..
A fully charged capacitor with a voltage of 120 V is discharged through a resistor. What is the voltage across the capacitor at the end of five time constants
If a block of wood floating on a pool of water has a volume of 37 cm3anddisplaces a volume of waterof 30 cm3, what is the densityof the wood
Two balls of masses Ma= 45 g and Mb= 65 g, are suspended. The lighter ball is pulled away to a 66 degree angle with the vertical and released. What is the velocity of the lighter ball before impact
A 0.200 nm photon collides with a stationary electron. After the collision, the electron moves forward and the photon recoils backward. Discover the momentum and the kinetic energy of the electron.
a cylinder of radius 3.34 cm and a sphere of radius 8.47 cm are rolling without slipping along the same floor. the two
A child, hunting for his favorite wooden horse, is running on the ground around the edge of a stationary merry-go-round, Find the shortest time it takes for the child to catch up with the horse
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