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A sound wave from a siren has an intensity of 86.2 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. What is the intensity level of the sound wave due to the ambulance?
____ dB
q1. a jewel thief hides a diamond by placing it on the bottom of a public swimming pool. he places a circular raft on
A 0.45 caliber bullet (m = 10.7 g) is fired into a large block of wood (M = 0.750 kg) so that the bullet becomes lodged in the block. What is the speed of the block after the collision
An electic dipole has charges of +or- 4.10pC that are separated by 6.25cm. Determine the net force on the dipole
A 66 {rm kg} skier speeds down a trail, as shown in the figure . The surface is smooth and inclined at the angle of 22 ^circ with the horizontal. Find the magnitude of the net force acting on the skier.
a 4.0 kilogram cart moving to the right and a 6.0 kilogram cart moving to the left on a horizontal frictionless surface. find the magnitude of the total momentum of the two-cart system
A third listener is positioned along the positive y-axis. What is her y-coordinate if same wave front reaches her at the same instant it does the first two listeners.
A useful model of a water molecule is sketched in the figure below, with point charges of 5.2 10-20 C at the H sites, What is the total electric potential energy of this model of a water molecule
A point charge of 20nC is placed on the x-axis at the point x = 2. Find the x-component of the electric field Ex at x = 4 and x = -1 where the coordinates are in meters
A proton and an alpha particle after being accelerated through same potential difference enter a uniform magnetic field the direction of which is perpendicular to their velocities
a 150 gm ice cube at 0.0 celcius is dropped into an insulated cup with 200 gm of water at 15 celcius. describe the final mixture after equilibrium has been reached
In a head-on collision, a car stops in 0.29 {s} from the speed of 28 {m/s}. The driver has a mass of 78 {kg}, and is, fortunately, tightly strapped into his seat. what force is applied to driver during that fraction of a second.
A technician wraps wire around a tube of length 37 cm having a diameter of 8.3 cm. If the current in this solenoid increases at the rate of 2 A/s, what is the self-induced emf in the solenoid
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