Physics, 10.10.2019 06:30 MilanPatel
Astudent thinks that the more protons an atom has, the more reactive it will be. which will best disprove this student's idea?
compare the reactivities of lithium (li) and krypton (kr).
note that rubidium has 48 neutrons.
compare the number of protons in cesium (ce) and xenon (xe).
count the number of neutrons in an atom of helium.
Answers: 3
Physics, 22.06.2019 05:00
At time t=0, a particle is located at the point (3,6,9). it travels in a straight line to the point (5,2,7), has speed 8 at (3,6,9) and constant acceleration 2i−4j−2k. find an equation for the position vector of the particle.
Answers: 2
Physics, 22.06.2019 23:10
Atorque acting on an object tends to produce a. equilibrium b. rotation c. linear motion d. velocity e. a center of gravity
Answers: 2
Physics, 23.06.2019 01:30
Match each type of lever with the correct diagram. 1. first-class 2. third-class 3. second-class
Answers: 3
Physics, 23.06.2019 02:40
An air standard cycle with variable specific heats is executed in a closed system and is composed of the following four processes. 1-2 isentropic compression 100 kpa and 22°c to 600 kpa 2-3 v=constant heat addition to 1500 k 3-4 isentropic expansion to 100 kpa 4-1 p=constant heat rejection to initial state (a) show the cycle on p-v and t-s s (b) calculate the net work output per unit mass (409 kj/kg) (c) determine the thermal efficiency (47.9%)
Answers: 1
Astudent thinks that the more protons an atom has, the more reactive it will be. which will best dis...
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