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In the afternoon, the decibel level of a busy street is95 dB with 100 cars passing at a givenpoint every minute. Late at night, the traffic flow is only 5 carsper minute. What is the late night decibel level?
dB
A 100 arrow is shot vertically from a bow whose efficient spring constant is 500. If the bow is drawn 75 before shooting the arrow, to what height does the arrow rise .
A block with mass m = 17.0 kg rests on a frictionless table and is accelerated by a spring with spring constant k = 4304.0 N/m after being compressed a distance x1 = 0.576 m from the spring’s unstretched length. The floor is frictionless except fo..
A major motor company displays a die-cast model of its first automobile, made from 5.60 kg of iron. To celebrate its hundredth year in business.
Yusef pushes a chair of mass m = 55.0kg across a carpeted floor with a force F? p of magnitude Fp = 148N directed at ? = 35.0degrees below the horizontal, What is the magnitude of the acceleration a of the chair
An iron brick measuring 200 mm / 20 cm / 0.05 m is submerged in pure water. (Hint: Use Table 4.4 from your book to find the densities) a) What is the weight of the brick? b) What is the buoyant force on the brick? c) What is the net force on the bric..
Violet light falls on a surface with two small slits 1.9 x10–4 cm apart. A first-order line appears 13.2 cmfrom the central bright spot on a screen opposite the slits. Thedistance from the center of the slits to the first-order violetline is 60 cm...
The wavelength of violet light is about 430 nanometers, or 4.30 10-7 m. The frequency of the violet light reflected from a metal surface and thefrequency of the vibrating electron that produces it are the same.What is this frequency?
Assume that the blocks accelerate as shown with an acceleration of magnitude a= 0.550 m/s^2 and that the coefficient of kinetic friction between block 2 and the plane is μ= 0.400. Find out the mass of block 2, m2, when θ= 30.0.
One end of a metal rod, which is insulated from the environment, has a length of 0.30 m and cross-sectional area 2.00 x 10-5 m2, Calculate the thermal conductivity K of the material in the rod
A microwave oven is powered by an electron tube called a magnetron, which generates electromagnetic waves of frequency 3.46 GHz. determine the speed of the microwaves
Scarlet has taken a summer job at a water park. In her act sheglides up a 2.0 m high frictionless ramp then sails over a 5 m widecage filled with hungry sharks. What is the minimum speed at whichshe can begin her ascent of the ramp in order to avo..
What are the errors in the energy transformation using electrically heated calorimeter experiment (energy transfer between electrical and heat energy) ? ( container was closed and there was an outer covering to the metal to prevent heat loss)
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