Physics, 18.08.2021 20:10 groverparham3
Oppositely charged objects attract each other. This attraction holds electrons in atoms and holds atoms to one
another in many compounds. However, Ernest Rutherford's model of the atom failed to explain why electrons were
not pulled into the atomic nucleus by this attraction.
What change to the atomic model helped solve the problem seen in Rutherford's model?
Bohr's work with atomic spectra led him to say that the electrons were limited to existing in certain energy levels,
like standing on the rungs of a ladder.
O Bohr's work with cathode rays led him to say that the electrons were located within the mass of positive material,
like plums in a pudding.
O Thomson's work with cathode rays led him to say that the electrons were located within the mass of positive
material, like plums in a pudding.
O Thomson's work with atomic spectra led him to say that the electrons were limited to existing in certain energy
levels, like standing on the rungs of a ladder.
Answers: 3
Physics, 21.06.2019 18:50, NycLife
How does the image distance (di) of a convex lens compare with the image distance of a concave lens? a. the image distance of the convex lens is positive, and that of the concave lens is negative. b. both are negative for a virtual image. c. both are positive for a virtual image d. the image distance of the convex lens is negative, and that of the concave lens is positive.
Answers: 1
Physics, 22.06.2019 01:10, joejoefofana
Suppose that two tanks, 1 and 2, each with a large opening at the top, contain different liquids. a small hole is made in the side of each tank at the same depth 1.57 m below the liquid surface, but the hole in tank 2 has 2.49 times the cross-sectional area of the hole in tank 1. (a) what is the ratio ρ1/ρ2 of the densities of the liquids if the mass flow rate is the same for the two holes? (b) what is the ratio rv1/rv2 of the volume flow rates from the two tanks? (c) at one instant, the liquid in tank 1 is 14.9 cm above the hole. if the tanks are to have equal volume flow rates, what height above the hole must the liquid in tank 2 be just then?
Answers: 3
Physics, 22.06.2019 13:40, youngbeauty17
Awind turbine is rotating counterclockwise at 0.5 rev/s and slows to a stop in 10 s. its blades are 20 m in length. (a) what is the angular acceleration of the turbine? (b) what is the centripetal acceleration of the tip of the blades at t=0s? (c) what is the magnitude and direction of the total linear acceleration of the tip of the blades at t=0s?
Answers: 1
Oppositely charged objects attract each other. This attraction holds electrons in atoms and holds at...
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