Physics, 28.01.2020 14:53 Looneytunness1806
One model for a certain planet has a core of radius r and mass m surrounded by an outer shell of inner radius r, outer radius 2r, and mass 4m. if m = 6.24 × 10^24 kg and r = 4.11 × 10^6 m, what is the gravitational acceleration of a particle at points (a) r and (b) 3r from the center of the planet?
Answers: 3
Physics, 21.06.2019 16:30
Aball bearing at 220.0 °c is dropped into a cup containing 250.0 g of water at 20.0 °c. the water and ball bearing come to a temperature of 30.0 °c. what is the heat capacity of the ball bearing in j/°c? (hint: how are the algebraic signs of q related for the ball bearing and the water? )
Answers: 1
Physics, 22.06.2019 23:00
1700 j of energy is lost from 0.14 kg object , the temperature decreases from 50°c to 45°c what is the specific heat of this object, amd what is the material ?
Answers: 1
Physics, 22.06.2019 23:50
An alpha particle with kinetic energy 12.5 mev makes a collision with lead nucleus, but it is not "aimed" at the center of the lead nucleus, and has an initial nonzero angular momentum (with respect to the stationary lead nucleus) of magnitude l = p0 b, where p0 is the magnitude of the initial momentum of the alpha particle and b=1.40×10−12 m. (assume that the lead nucleus remains stationary and that it may be treated as a point charge. the atomic number of lead is 82. the alpha particle is a helium nucleus, with atomic number 2.) what is the distance of closest approach?
Answers: 2
Physics, 23.06.2019 06:30
What is a possible explanation for a set of facts that can be tested by further investigations called
Answers: 3
One model for a certain planet has a core of radius r and mass m surrounded by an outer shell of inn...
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