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What is the displacement amplitude of sound with frequency f = 1.5 kHz and intensity level = 90 dB. Take the speed of sound to be v = 340 m/s and the density of air to be = 1.3 kg/m3.
An object moving with uniform acceleration has a velocity of 16 cm/s in the positive x direction when its x coordinate is 3 cm. If its x coordinate 1 s later is -5 cm, what is its acceleration.
1. a a massless rope is stretched horizontally between two supports that are 3.0 m apart. when an object of weight 3200
You are in a laboratory and investigating properties of a converging lens. Calculate how far the image is from the lens
A 50 kg person stands at the edge of a 7.4 m diameter circular platform, which is mounted horizontally on frictionless bearings and has a total mass of 300 kg. What is the magnitude of the speed of the person (in m/s) with respect to the ground
In the deep ocean, a water wave with wavelength 95 m travels at 12 m/s. What will be the vertical position of the boat 5.0 s later
The entrance to a large lecture room consists of two side-by-side doors, one hinged on the left and the other hinged on the right. Each door is 0.740 m wide. Sound of frequency 708 Hz is coming through the entrance from within the room.
The current density inside a long, solid, cylindrical wire of radius a is in the direction of the central axis and its magnitude varies with radial distance r from the axis according to J = br2, where b is a positive constant.
A 0.058 kg aluminum bullet traveling at 481 m/s strikes an armor plate and comes to a stop. what is the bullet's temperature change in degrees Celsius
The pendulum in a grandfather clock is made of brass and keeps perfect time at 20?C. How much time is lost in a year
A 10 kg block of ice has a temperature of -8°C. The pressure is one atmosphere. The block absorbs 4.20 106 J of heat. What is the final temperature of the liquid water?
A converging lens produces a real image magnified 3 times that of an object. If the object is placed at 15 cm from the lens, calculate the focal length of the converging lens
Consider the following pipe assembly containing a permeable filter of length L=20cm, area A=20cm^2, and permeability of 4 millidarcys. what is the velocity of the flow through the filter section
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