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Two speakers, one directly behind the other, are each generating a 245-Hz sound wave. What is the smallest separation distance between the speakrs that will produce constructive interference at a listener standing in front of them? The speed of sound is 343m/s.
Suppose you have to move a heavy crate of weight 875 N by sliding it along a horizontal concrete floor. What is the magnitude Fp of the minimum force you need to exert on the crate to make it start sliding along the floor
The sliding bar in the figure has a length of 0.513 m and moves at 1.76 m/s in a magnetic field of magnitude 0.263 T. Calculate the magnetic force on the bar
A 0.9 inch tall clock is 29 cm in front of a diverging lens which has a focal length of -30 cm, Determine the image distance and height
If you detect a frequency shift of 195.4Hz in the 4000-Hz bell of a bicycle as it approaches and then leaves you, how fast is the bicycle going
Two metal balls are hung from strings. The first ball, 0.14 kg, is pulled to the side and released so that it strikes the second ball with a speed of 1 m/s. What is the mass of the second ball
An electric field of 120000 N/C points due west at a certain spot. What is the magnitude of force that acts on a charge of -7.8C at this spot.
A 62kg hiker starts at an elevation of 1500m and climbs to the top of a 3500m peak, What is the minimum work required of the hiker
An ice skater has a moment of inertia of 2.3kg*m^2 , when his arms are tucked in close to his chest
A 0.500-kg mass on a spring has velocity as a function of timegiven by vx(t) = (3.60cm/s) sin[(4.71s-1)t -?/2]. What is the force constant of the spring
You are driving to the grocery store at 20. You are 100 from an intersection when the traffic light turns red. Suppose that your reaction time is 0.70 and that your car brakes with constant acceleration. What acceleration would bring you to rest r..
The rms speed of a sample gas is increased by 2 %, What is the percent change in the temperature of the gas
Illustrate what angular speed must such a cylinder have so that the centripital acceleration at its surface equals the free-fall acceleration on Earth?
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