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Q. 1. You are listening a soft music with a sound level of 50 dB. A subway train passes by whose sound level is 90 dB. What is the total intensity level of the combined sound in dB.
2. What is the air temperature if the speed of sound is a) 432 m/s b) 380 m/s
3. Compare the speed of sound in glass and granite. Which material can be best used to control sound?Y glass = 70 N/m2 ρ glass = 2600 kg/m3Y granite = 45 n/m2 ρ granite = 2700 kg/m3
4. Is the speed of light greater in ethyl alcohol or glycerinen ethyl alcohol = 1.36 n glycerine = 1.47
5. A beam of light enters water at an angle of 60 0 angle of incidence. Find the angle of refraction.n air = 1 n water = 1.33
6. Light passes from air into water. If the angle of refraction is 20 0, what is the angle of incidence.
The diodes are oppositely oriented, so that when one diode is forward-biased, the other is back-biased. Which phrase best describes the current in the circuit.
Ricardo and Jane are standing under a tree in the middle of a pasture. An argument ensues, and they walk away in different directions. Ricardo walks 24.0 in a direction 60.0 west of north. Jane walks 12.0 in a direction 20.0 south of west. They then ..
Is the collision completely elastic
The intensity of sunlight that reaches Jupiter (orbiting at about 5 AU) is approximately what fraction of that at Earths orbital distance.
A double-slit experiment is set up using red light (l = 714 nm). A first order bright fringe is seen at a given location on a screen. What wavelength of visible light (between 380 nm and 750 nm) would generate a dark fringe at the identical locati..
n object of mass "m" specific heat "Cp" & surface area "As" is initially at a temperature "To". Rate of Heat gained by Object = Rate of Heat Lost by Gas m, Cp, h, A & Tg are all constants.
What is the electric potential energy of three equal positive charges of 1.33 µC while they are arranged to form a triangle 2.10 x 10-3 m on a side.
What is current flowing through the collider
An ocean liner leaves New York City and travels 16.10 ° north of east for 234 km. How far east and how far north has it gone? In other words, what are the magnitudes of components of the ship's displacement vector in directions (a) due east and (b..
A rifle fires a 2.39 10-2-kg pellet straight upward, since the pellet rests on a compressed spring that is released when the trigger is pulled. The spring has a negligible mass and is compressed by 9.17 10-2 m from its unstrained length. The pellet r..
How to compute the average force
A box of books weighing 334 N is shoved across the floor by a force of 479 N exerted downward at an angle of 33° below the horizontal. What is the maximum coefficient of kinetic friction between the box and the floor that allows the box to move with ..
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