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A sound is set up in a pipe closed at one end and open atthe other. According to the formula given by Dr. Willis in class,when n=3 how much of a wavelength is in the pipe?6wavelengths3wavelengths1.5wavelengths1.25wavelengths0.75wavelengths
An asteroid has acquired a net negative charge of 119 C from being bombarded by the solar wind over the years, and is currently in equilibrium whereby it expels electrons at the same rate as it acquires them. How many more electrons does it have than..
A supersonic jet passes directly overhead at an altitude of 12,930 m, traveling at 680 m/s, or mach 2. How much time elapses before you hear the sonic boom
When the plunger is pushed, contents of the syringe are forced throughout a hollow needle (also of circular cross-If a 4.0 N force is applied to plunger and diameters of the plunger and the needle are 1.20 cm and 2.50 mm, correspondingly, what force ..
A railroad car fo Mass M=2000kg and speed V0= 8.50m/s collides and couples to another car of equal mass and initially at rest. What is the final speed of the two couple railroad cars
A 5.01E+4 kg space probe is traveling at a speed of 12600 m/s through deep space. Retrorockets are fired along the line of motion to reduce the probe's speed, What is the final speed of the probe?
An 8 Meter ladder is leaning against a frictionless wall making a 60 degree angle with the ground. What are the forces excreted on the ladder by the wall and the ground
if the maximum height from which a person can jump without a parachute and still survive is 7.50 meters the maximum
A proton is at the origin and an electron is at the point = 0.45 , = 0.31 . Find the electric force on the proton.
A 135 mCi radioactive tracer is made in a nuclear reactor. When it is delivered to a hospital 18 hours later its activity is 85 mCi. The lowest usable level of activity is 10 mCi. What is the tracer's half-life
A milliammeter reads 15mA full scale. It consists of a 0.20 Ohm resistor in parallel with a 36 Ohm galvanometer
A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 7.50 m/s at an angle of 25.0° below the horizontal. It strikes the ground 5.00 s later. (a) How far horizontally from the base of the building does..
A loudspeaker of mass 21.0 {rm kg} is suspended the distance of h = 2.40 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 3.90 {rm m}.
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