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A 1.6kg ball is hung from a 145-cm long string. When it is pulled aside to 18cm, it is released from rest and allowed to sing in simple harmonic motion. When the ball is accelerating at -0.64m/s^2, how fast is is moving?
Matthew pulls his little sister Sarah in a sled on an icy surface (no friction) with a force of 60 N at an angle of 600 upward from the horizontal. Find acceleration of the sled
An archer shoots an arrow at a 75.0 m distant target; the mull's eye of the target is at the same height as the release height of the arrow. At what angle must the arrow be released to hit the bull's eye if its initial speed is 35.0 m/s
A parallel plate capacitor has square plates with sides of length 10 cm. The distance between the plates is 4 mm. What is the amount of charge on each plate
In a small town there are only two AM radio stations, one at 900kHz and one at 1350kHz. What is the wavelength of the radio wave transmitted by the first station
A narrow glass tube, open at one end, closed at the other, is 40cm long. Determine the frequency of the moving sound source
If the ?rst package travels with constant speed and takes time ΔT = 5.0 days to arrive as measured by the crew member on the space station, what distance does it travel in the frame of reference of the space station? Give your answer in units of l..
Suppose your waffle iron is rated at 1.50 kW when connected to a 2.10 multiply.gif 102 V source. What current does the waffle iron carry? What is its resistance?
What's the change in the atom's total energy if the radius increases to 25a0? Does this process correspond to the emission or absorption of a photon? What's the photon's wavelength?
A tiny sphere with a charge of q = +6.4 µC is attached to a spring. Two other tiny charged spheres, each with a charge of ?4.0-µC, are placed in the positions shown in the figure, in which b = 4.1 cm.
A slit of width 0.50 mm is illuminated with light of wavelength 500 nm, Find the widths of the first and second maxima of each side of the central maximum
An emf is induced in a conducting loop of wire1.42 {\rm m} long as its shape is changed from square to circular. Find the average magnitude of the induced emf if the change inshape occurs in 4.12 {\rm s} and the local 0.121-{\rm T} magnetic field ..
Standing on the ground 3.5m from a building, you want to throw a package from your 2.0-m shoulder level to someone in a window 3.6m above the ground. At what speed should you throw the package so it just barely clears the windowsill
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