
Two identical loudspeakers are 3.2 m apart. A person stands 5 m from one speaker and 4.2 m from the other. What is the lowest frequency at which destructive interference will occur at this point? The

The sound in a classroom is 67000 times as intense as the minimum threshold of hearing. What is the intensity level of this sound in decibels? in dB

3 Cosmic Ray A cosmicray particle has been observed (indirectly) with an estimated energy of 16 J, or about 1020 eV. Suppose this particle was a proton (mc2 109 eV). a) What was the velocity of t

5 Traffic Ticket A physicist is arrested for running a red light. In court, he pleads that he approached the intersection at such a speed that the light looked green to him. The judge, having taken a

A physics question. Solve part B

If one sound is 24 dB greater than another sound, what is the ratio of their intensities (greater/smaller)?

By how many decibels do you reduce the sound intensity level due to a source of sound if you quadruple your distance from it? Assume that the waves expand spherically. in dB

A spherical source radiates sound uniformly in all directions. At a distance of 13 m, the sound intensity level is 82 dB. What power is radiated by this source? in W

When playing shuffleboard, a player exerts a constant force of 2.1 N on an initially stationary puck, at an angle 55 below the horizontal. If the player pushes the puck for 1.5 m, how fast is the puc

An elevator car, with a mass of 500 kg, starts at rest and moves upward with a constant acceleration until it reaches a velocity of 1.60 m/s after 2.70 seconds. If the car rises 2.16 m during this tim
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Sample Questions
 The Earth’s rate of rotation is constantly decreasing, causing the day to increase in duration. In the year 2000 the Earth takes about 0.548 s longer to complete 365 revolutions than it did in the year 1900.
 (a) What is the average angular acceleration of the Earth?
 (b) If this average acceleration remains constant, in what year will the Earths rotation come to rest?
1. Can you show me step by step how to solve this problem?:
 A spherical balloon is made from a material whose mass is 3.00kg. The thickness of the material is negligible compared to the 1.5m radius of the balloon. The balloon is filled with helium (He) at a temperature of 305degrees K and just floats in the air, neither rising nor falling. The density of the surrounding air is 1.19kg/m^3. Find the absolute pressure of the helium gas
2. I do not understand this Ideal Gas Law and Kinetic Theory question. Can you help me set it up?