Physics, 29.09.2019 04:30 lexidecker243
Two small aluminum spheres, each having mass 0.0250 kg, are separated by 80.0 cm. (a) how many electrons does each sphere contain? (the atomic mass of aluminum is 26.982 g> mol, and its atomic number is 13.) (b) how many electrons would have to be removed from one sphere and added to the other to cause an attractive force between the spheres of magnitude 1.00 * 104 n (roughly 1 ton)? assume that the spheres may be treated as point charges. (c) what fraction of all the electrons in each sphere does this represent?
Answers: 2
Physics, 21.06.2019 21:30
According to social exchange theory, altruistic behaviors benefit the individual who performs them.
Answers: 1
Physics, 21.06.2019 22:00
Animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. reactivate d) a dog is getting hot in the sunlight, so he moves to a shaded area.
Answers: 2
Physics, 22.06.2019 05:50
Acylinder with a movable piston contains 11.7 moles of a monatomic ideal gas at a pressure of 1.32×10^5 pa. the gas is initially at a temperature of 300 k. an electric heater adds 43200 j of energy into the gas while the piston moves in such a way that the pressure remains constant. cp=20.79 j k^−1 mol^−1 for a monatomic ideal gas, and that the number of gas molecules is equal to avogadro's number (6.022×10^23) times the number of moles of the gas. (a) what is the temperature of the gas after the energy is added? (b) what is the change in volume of the gas? (c) how much work is done by the gas during this process?
Answers: 3
Physics, 22.06.2019 15:10
An important dimensionless parameter concerned with very high-speed flow is the mach number, defined as v/c, where v is the speed of the object such as an airplane or projectile, and c is the speed of sound in the fluid surrounding the object. for a projectile traveling at 1170 mph through air at 50 Ëšf and standard atmospheric pressure, what is the value of the mach number?
Answers: 2
Two small aluminum spheres, each having mass 0.0250 kg, are separated by 80.0 cm. (a) how many elect...
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