How many seconds before the plane is directly overhead
The pilot of an airplane traveling 250 km/h wants to drop supplies to flood victims isolated on a patch of land 170 m below. The supplies should be dropped how many seconds before the plane is directly overhead?
Expected delivery within 24 Hours
A 400kg ruck is moving with a velocity of 40km/h.it is stopped 25m beyond the point at which the brakes are applied. Find the retarding force
Where the free-fall acceleration is 3.7 meters per second ^2. Find the velocity with which it hits the ground. answer in units of m/s.
A pair of speakers separated by 0.900 m are driven by the same oscillator at a frequency of 672 Hz. An observer originally positioned at one of the speakers begins to walk along a line perpendicular to the line joining the speakers. (Assume the sp
The nuclide 55Ca has a half-life of 2.737 years, decaying by electron capture to 55Mn. Find the mean life and the decay constant for this radionuclide. A source of this isotope has an activity of 0.900 mCi. Find the activity remaining after the e
A 69.0 {rm kg} person stands on a lightweight diving board supported by two pillars, one at the end of the board, the other 1.50 {rm m} away. The pillar at the end of the board exerts a downward force of 818 {rm N}. How far from that pillar is the
A train at a constant 69.0 km/h moves east for 46 min, then in a direction 56.0° east of due north for 17.0 min, and then west for 58.0 min. What are the (a) magnitude (in km/h) and (b) angle (relative to north, with east of north positive and
A photon of wavelength 0.13 nm is incident on a slab of carbon, and its wavelength is shifted by 0.0120% (note: that's not the same as 1.2%). Determine the incoming photon energy in electron volts.
The plane encounters a 58.4 m/s wind from the jet stream, which blows from west to east. What is the maximum distance that the plane can travel due west and just be able to return home?
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