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A rescue plane flies horizontally at a constant speed searching for a disabled boat. When the plane is directly above the boat, the boat's crew blows a loud horn. By the time the plane's sound detector perceives the horn's sound, the plane has traveled a distance equal to one half its altitude above the ocean. If it takes the sound 2.44 s to reach the plane, determine the altitude of the plane. Take the speed of sound to be 349 m/s.
a block of mass M=46 kg slides down a frictionless inclined plane and collides elastically with another block of mass m=25.0 kg. what is the velocity of m after the collision
how many turns should a solenoid of cross-sectional area 0.035 m2 and length 0.39 m have if its inductance is to be 48
two carpenters are hammering at the same time each at a different hammering frequency. the hammering frequency is the
Suppose you walk 1.80 km straight west and then 2.50 km straight north. How far are you from your starting point
Imagine that we drop a block of mass m from a height h above the comparatively lightweight plate supported by a vertical spring with relaxed length L and spring constant k. From what value of h would we have to drop the block to compress spring to..
An insulated container of negligible mass holds 0.200 kg of water and 0.05kg of ice in thermal equilibrium at atmospheric pressure. calculated the specific heat capacity c of heat
a proton is sent into a region of constant magnetic field oriented perpendicular to the protons path. there the proton
Calculate the energies and speeds of electrons in circular Bohr orbits in a hydrogen like atom using the relativistic expressions for kinetic energy and momentum
To measure signal propagation in a nerve in the arm, the nerve is triggered near the armpit. What is the speed of propagation along this nerve
You're driving down the highway late one night at 18 when a deer steps onto the road 36 in front of you. The reaction time before stepping on the brakes is 0.50, and the maximum deceleration of your car is 12.
A 0.170 kg tumour is being irradiated by a radioactive source. Each decay of the radioactive source produces a particle with an energy of 0.450 MeV. find the activity of the radioactive source
consider a category five hurricane that has a maximum wind speed of 160 mph at the eye wall, 10 miles form the center of the hurricane. if the flow in the hurricane outside of the hurricane's eye is approximate as a free vortex, determine the wind sp..
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