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Standing waves are set up on a string and the nodes are observed to be 0.40m apart. If the frequency is 4 Hz,
a) What is the period?
b) What is the speed of the waves?
Asteroids can be classified into two broad groups based on their composition and location: carbon-rich asteroids dominate the outer part of the asteroid belt, whereas metal-rich asteroids dominate the inner part of the belt. Analysis of the fragme..
A lens of focal length 45 mm is mounted on a 35 mm camera. The lens aperture is set at f/2 and the shutter speed set at 1/2000 s. Find the aperture diameter
you need to move a 500 n box horizontally across the floor. you pull on the box with a rope which is also horizontal.
A heat engine operates between a reservoir at 28°C and one at 432°C. What is the maximum efficiency possible for this engine
A pipe that is closed on one end is 1.2 meters long. What are its fundamental frequency and its first two overtones? You punch out the closed end of the pipe. What are its new first and second harmonic frequencies?
The Moon rises and sets, for example, a new moon that is on an observer's latitude at 12 noon rises at 6 A.M. and sets at 6 P.M. Suppose an astronaut on the Moon saw the Earth on his longitude at 12 noon. At what time would the Earth set?
In a downhill skiing competition, a 57.0-kg skier goes through the first 25.0 m of a curved path in 3.10 s. What is the average acceleration of the skier
In order to produce a level of radioactivity of 1mCi, how many nuclei of 99mTc (lambda=3.22x10^-5 s-1) must be present? What mass of the radionuclide does this correspond to?
One cubic meter (1.00m^3) of aluminium has a mass of 2.70*10^3 kg, and 1.00 m^3 of iron has a mass of 7.86*10^3 kg. Discover the radius of a solid aluminium sphere that will balance a solid iron sphere of radius 2.00 cm on an equal arm balance.
Bifocal glasses are used to correct both nearsightedness and farsightedness at the same time. If the near points in the right and left eyes are 60.0 cm and 50.0 cm, respectively, and the far point is 175 cm for both eyes, what are the powers of th..
One mole of a monatomic gass initially at 273 K and 1 atm is compressed isothermally (T constant) from volume 22.4 L to 11. 4 L, Find the final pressure and draw a PV diagram, Labeling the initial and final states 1 and 2
An Australian emu is running due east in a straight line at a speed of 12.5 m/s and slows down to a speed of 11.4 m/s in 7.3 s. (a) What is the direction of the bird's acceleration? north south east west.
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