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A visitor to a lighthouse wishes to determine the height of the tower. She ties a spool of thread to a small rock to make a simple pendulum, which she hangs down the center of a spiral staircase of the tower. The period of oscillation is 8.29 s. What is the height of the tower?
A satellite of mass 410 kg is launched from a site on the Equator into a circular orbit at 5000 km above Earth's surface. DATA: Rearth=6.38×106 m. a.) What is the acceleration of gravity at this altitude? b.) What is the speed of the satellite? c.) W..
Determine magnitude of the force
One recent study has shown that x rays with a wavelength of 0.0050 nm can produce significant numbers of mutations in human cells. Calculate the energy in eV of a photon of radiation with this wavelength.
You know your mass is 70kg , but when you stand on a bathroom scale in an elevator, it says your mass is 94kg . What is the acceleration of the elevator
A resistance R and a 3-H inductance are in series across a 60-Hz ac voltage. What is the ac input voltage
A step-down transformer is used for recharging the batteries of portable devices. The turns ratio N2/N1 for a particular transformer used in a CD player is 4:15. obtain the rms output voltage of the transformer
Assuming that the atom was initially at rest, determine the recoil speed of the hydrogen atom when it emits this photon
A ball is thrown upward at a speed v0 at an angle of 50.0° above the horizontal. It reaches a maximum height of 7.5 m. How high would this ball go if it were thrown straight upward at speed v0.
The average coefficient of volume expansion for carbon tetrachloride is 5.81 10-4 (°C)?1. If a 48.5-gal steel container is filled completely with carbon tetrachloride when the temperature is 10°C, how much will spill over when the temperature rises t..
an olympic weightlifter snatches 100 kg. In a snatch the barbell is moved from a stationary position on the floor to a stationary poition over the athlete's head. determine the weightlifter's average power output
A horizontal circular platform rotates counterclockwise about its axis at the rate of 0.875 rad/s. You, with a mass of 69.5 kg, Calculate the total angular momentum of the system
A sample containing beryllium (atomic mass 9 u), aluminum (27 u), and an unknown element is placed in a mass spectrometer. What is the mass of the unknown element
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