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Q. Two speakers, one directly behind the other, are each generating a 275 Hz sound wave. What is the smallest separation distance between the speakers that will produce destructive interference at a listener standing in front of them? Assume that the speed of sound is 335 m/s.
Q. A 0.7 kg block of ice is sliding by you on a very slippery floor at 4 m/s. As it goes by, you give it a kick perpendicular to its path. Your foot is in contact with the ice block for 0.003 seconds. The block eventually slides at an angle of 27 degrees from its original direction (labelled in the diagram). The overhead view shown in the diagram is approximately to scale. The arrow represents the average force your toe applies briefly to the block of ice.
What is the unit vector in the direction of the block's momentum after the kick?
A 220 block on a 52 long string swings in a circle on a horizontal, frictionless table at 95.What is the speed of the block? What is the speed of the block.
A 0.144 kg baseball is pitched horizontally at +38 m/s and after it is hit by the bat it moves horizontally at -38 m/s.
A car travelling at 120 strikes a tree. The front end of the car compresses and driver comes to rest after travelling 0.900.
Physics 1401 problems about rotational motion and angular displacement and angular velocity and angular acceleration about height problems.
A 2000-kg horizontal beam is supported at each end. A 160-kg load rests a quarter of the way from one end if the beam and 120 kg cargo is 1/3 from the other end. What is the vertical force on each of the supports.
Basic science concepts in optics like Which types of electromagnetic radiation can be seen from the surface of Earth.
A gardener feels it is taking him excessively long to water a garden with a 0.952cm diameter hose. By what factor will his time be shortened, if he uses a 1.58 cm diameter hose.
What additional experiment can help you decide between these two possibilities.
determine the value of IG. The support at B does not move while the measurement is taken. For the calculation, the horizontal location of G should be determined.
Two positive point charges, each 17? C, lie along the x-axis at x = –0.12m and x = +0.12m.
When a high-speed passenger train traveling at 170 km/h rounds a bend, engineer is shocked to see that a locomotive has improperly entered onto the track from a siding and is a distance D = 601 m ahead.
A singly charged ion of unknown mass moves in a circle of radius 14cm in a magnetic field of 8.2 T. The ion was accelerated through a potential difference of 9kV before it entered the magnetic field.What is the mass of the ion.
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