Physics, 31.03.2020 00:53 jsndbdbsbsj
The Density of the Earth Using the known radius of the Earth and that g = 9.80 m/s2 at the Earth's surface, find the average density of the Earth. SOLUTION Conceptualize Assume the Earth is a perfect sphere. The density of material in the Earth varies, but let's adopt a simplified model in which we assume the density to be uniform throughout the Earth. The resulting density is the average of the Earth. Categorize This example is a relatively simple problem. Using the equation mg = G MEm RE2 , solve for the mass of the Earth. (Use the following as necessary: g, G, m, and RE.) ME = Substitute this mass and the volume of a sphere into the definition of density. (Use the following as necessary: g, G, and RE. Enter the final calculated value in kg/m3.) rhoE = ME VE = gRE2 G 4 3 πRE3 = 3g = kg/m3 EXERCISE Imagine that we discovered a planet that has gravity at its surface 3.7 times that on Earth's surface, while its radius is 4.80 ✕ 107 m. Determine the average density of the planet (in kg/m
Answers: 3
Physics, 22.06.2019 12:30
Apositive charge moves in the direction of an electric field. which of the following statements are true? check all that apply. check all that apply. 1.the potential energy associated with the charge decreases. 2. the electric field does positive work on the charge. 3. the electric field does negative work on the charge. 4. the potential energy associated with the charge increases. 5. the electric field does not do any work on the charge. 6. the amount of work done on the charge cannot be determined without additional information.
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Physics, 22.06.2019 14:30
Suppose that 27 j of work is needed to stretch a spring from its natural length of 6 m to a length of 9 m. (a) how much work is needed to stretch the spring from 12 m to 14 m? j (b) how far beyond its natural length will a force of 78 n keep the spring stretched?
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Physics, 22.06.2019 22:00
Awhite-blue star is hotter than a red star. select the best answer from the choices provided true or false
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Physics, 23.06.2019 00:30
Which of the following statements accurately describes the sign of the work done on the box by the force of the push? a. positive b. negative c. zero
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The Density of the Earth Using the known radius of the Earth and that g = 9.80 m/s2 at the Earth's s...
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