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Question : 1 A loudspeaker is producing sound of a certain wavelength. Which combination of the wavelength (expressed as a multiple of %uo3BBO) and the speakers diameter (expressed as a multiple of DO) would exhibit the greatest amount of diffraction when the sound leaves the speaker and enters the room?
Question : 2 A Camot heat pump is used to heat and maintain a residential building at 75 degrees F. An energy analysis of the house reveals that it loses heat at a rate of 2500 Btu/h per degree F temperature difference between the indoors and the outdoors. For an outdoor temperature of 35 degrees F, determine (a) the coefficient of performance and (b) the required power input to the heat pump.
Question : 3 The car lift at your neighborhood garage is designed such that the radii of the input piston and output plunger are 8.50 x 10-3 m and 0.120 m, respectively. The garage manager likes to use a hydraulic oil in the lift that has a density of 7.80 x 102 kg/m3. Compared to the weight of the output plunger, the weight of the input piston is negligible. Determine the force Fi needed at the input piston in order to support the 12,000-N combined weight of a car and the output plunger under the following conditions.
The bottom surfaces of the input piston and output plunger are at the same level. ____________N
The bottom surface of the input piston is 2.80 m below that of the output plunger. ____________N
A helium-neon laser (?=633 nm) illuminates a diffraction grating. What is the spacing between slits of the grating
q1. on the wheel of fortune game show a solid wheel of radius 6.7 m and mass 10 kg is given an initial counter
answer the following questionsa why does a paramagnetic sample display greater magnetisation for the same magnetising
A proton moving at 4.30 106 m/s through a magnetic field of 1.75 T experiences a magnetic force of magnitude 8.04 10-13 N
Find the angle (above the horizontal) at which a projectile achieves its maximum range, if y=y0. Express your answer using two significant figures
Produce a concise definitional summary of these terms: The entry should be no more than 200 words and will form part of the 'Learning Portfolio Assessment' as outlined in your Unit Plan
After a tornado, a 0.50-g drinking straw was found embedded 4.5 cm in a tree. What was the straw's speed
A wire is formed into a circle having a diameter of 10.2 cm and is placed in a uniform magnetic field of 3.13 mT. The wire carries a current of 5.00 A. Discover the maximum torque on the wire.
A small block with mass 0.706 kg is sliding down a frictionless ramp that is inclined at an angle of 53.1° above the horizontal. Assume g = 9.80 m/s2. what is the magnitude of the normal force that the surface of the incline exerts on the block
The components of the electric field in an electromagnetic wave traveling in vacuum are described by Ex = 0, Ey = 0, and Ez = 7.58 sin(7.83x - wt) V/m, Calculate the amplitude of the magnetic field of the wave
A river 24.0 m wide and 5.0 m deep drains a 3000.0 km2 land area in which the average precipitation is 48 cm/year. What is the average speed of the river
A 5.00-kg object is initially at rest. The object is acted on by a 9.00-N force toward the east for 3.00 s. No force acts on the object for the next 4.00 s. How far has the object moved during this 7.00 s interval
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