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An interstate highway has been built through a poor neighborhood ina city. In the afternoon, the sound level in a rented room is100.0 dB as 85cars pass outside the window every minute. Late at night, thetraffic flow is only five cars per minute. What is the averagelate-night sound level in the room? dB
A 5.7kg box is on a frictionless 44° slope and is connected via a massless string over a massless, find the tension in the string once the box begins to move
An eastbound subway train accelerates from rest at 1.22 m/s2 along a straight track. How far apart are the trains when the eastbound subway train is traveling at the same speed as the westbound train
a what is the angular momentum of a 3.8 kg uniform cylindrical grinding wheel of radius 16 cm when rotating at 1900
An astronaut drops a feather from 3.5 m above the surface of the moon. If the acceleration of gravity on the moon is 1.62 m/s2, how long does it take the feather to reach the surface
A 51kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 250N. For the first 10.5m the floor is frictionless, and for the next 10.5m the coefficient of friction is 0.18. What is the final speed of the crate af..
A light ray in air enters a glass slab at point A at incident angle theta1 and then undergoes total internal reflection at point B,. What is the maximum value of theta1if the index of refraction of the glass is 1.4? For the ray of light that goes fro..
W hat are underwater angles of refraction
A lamp which is 12.0 cm tall is 264.0 cm in front of a converging lens which has a focal length of 80.0 cm, What is the image distance for this lamp and lens combination
The magnitude of the field produced by a point charge of +5.4 micro-coulombs has a magnitude of 5.9 x 106 N/C, How far is the point from the charge
what is the minimum speed need to drive through a banked turn such a car wont slip down the road. the turn is banked at
A light ray is traveling toward an interface between sapphire, n= 1.76, and water, n= 1.33. What is the critical angle for total internal reflection
Suppose the peak of a particular star's spectrum occurs at about 6000 Å (Angstrom). (a) Use Wien's law to calculate the star's surface temperature. (b) If this star were a factor of four hotter, at what wavelength would its spectrum peak? In what ..
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