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Sally invites you to go on a long journey with her into space in her small spaceship of mass 1000kg. Using thermodynamics approach, she tells you that stellar bodies can be assumed to have an average mass of 10^30kg ( mass of the sun ), and to move with a random velocity of 10 km/s. She wants to know the average velocity the rocket will reach after a very long time. You asked her, "what happens if we fall into a star?" She tells you to neglect the possibility of that happening.
icyclists in the Tour de France do enormous amounts of work during a race. For example, the average power per kilogram generated by Lance Armstrong (m = 75.0 kg) is 6.50 W per kilogram of his body mass.
A solid, uniform disk of radius 0.250 m and mass 61.6 kg rolls down a ramp of length 4.60 m that makes an angle of 16° with the horizontal. Find the speed of the disk's center of mass when it reaches the bottom of the ramp
A 900 kg car can accelerate from rest to90 km/h in 7.4 s. What is the average power delivered by the engine
a fighter pilot sits on a bathroom scale in her cockpit as she moves in a straight and level flight at 200 ms. the
q1. a 59.0 kg pole vaulter running at 9.5 ms vaults over the bar. if the vaulters horizontal component of velocity over
The Earth can produce the downward electric field of 150 N/C around its surface. Assume this electric field is uniform through the atmosphere. Estimate the net charge of the Earth
A parallel-plate capacitor is charged to 5000 V. A proton is fired into the center of the capacitor at a speed of2.4×105m/s. The proton is deflected while inside the capacitor, and the plates are long enough that the proton will hit one of them befor..
Brian is trying to pull Julie on a sled across a flat snowy field. Brian pulls on a rope attached to the sed. His pulling force is directed forward and upwards at a 30 degree angle above horizontal. Julie's mass is 50kg and the sleds mass is 8kg. If ..
A Thermopane window of area 6.8 m2 is constructed of two layers of glass, each 5.4mm thick and separated by an air space of 2 mm. If the inside is at 12?C and the outside is at ?36?C, how much heat is lost through the window? The thermal conductivity..
A photon of initial energy 0.10 MeV undergoes Compton scattering. After scattering, the photon's energy is 0.09 MeV. Find the recoil energy of the electron
starting with the four maxwells equations for time-varying electromagnetic fields in either differential and integral
Two objects begin at different corners of an equilateral triangle with sides of length 32 m and race towards the third corner. how long after the first object begins should the second object start so that they meet at the final corner at the same tim..
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