H.W: In the Boher model of the hydrogen atom an electron moves at 2.19*10m/sin an orbit of radius 5.29*10" centered on a proton. (a)what is the centripetalforce on the electron? (b)what is the number of revolutions made each second?Ans. (a)9.06*10"m/s (b = 6. 58 + 1015 1/sH.W: A ball is thrown with an initial speed voat an angle 0 below the horizontalfrom rooftop 44m above the ground. It lands 2sec later at a point 32m from theVorbase of the building. Find vo and 0Ans. 0 = -37.32vo = 20. 1m/sH.W: A ball thrown up from a rooftop of height 40m lands on ground in 4s.(a)what is its maximum height above the ground? (b)what is its velocity 15m belowthe rooftop?Ans. (a)44.7m (b) v = -19.65 4H.W: An object is thrown horizontally at 20m/s from a cliff top 45m above sealevel. Find (a)the time to land; (b)the angle at which it hits the water; (c)the speedat which it hits the water.Ans. (a)3.03s (b)Ø = -54.73 (c)35.79m/s

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H.W: In the Boher model of the hydrogen atom an electron moves at 2.19*10°m/s in an orbit of radius 5.29 10" centered on a proton. (a)what is the centripetal force on the electron? (b)what is the number of revolutions made each second?

H.W: In the Boher model of the hydrogen atom an electron moves at 2.19*10°m/s in an orbit of radius 5.29 10" centered on a proton. (a)what is the centripetal force on the electron? (b)what is the number of revolutions made each second?

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter1: Physics And Measurement

Section: Chapter Questions

Problem 1.29P

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Concept explainers

Proper Length

The theory of special relativity explains the connection between space and time to objects that move in a straight line at a constant speed. The objects move at the speed of light. When an object approaches light speed, its mass is endless and cannot move faster than light. The most crucial postulate of Einstein's special relativity is that the laws of nature do not change in each frame of reference.

Question

H.W: In the Boher model of the hydrogen atom an electron moves at 2.19*10m/s
in an orbit of radius 5.29*10" centered on a proton. (a)what is the centripetal
force on the electron? (b)what is the number of revolutions made each second?
Ans. (a)9.06*10"m/s (b = 6. 58 + 1015 1/s
H.W: A ball is thrown with an initial speed voat an angle 0 below the horizontal
from rooftop 44m above the ground. It lands 2sec later at a point 32m from the
Vor
base of the building. Find vo and 0
Ans. 0 = -37.32vo = 20. 1m/s
H.W: A ball thrown up from a rooftop of height 40m lands on ground in 4s.
(a)what is its maximum height above the ground? (b)what is its velocity 15m below
the rooftop?
Ans. (a)44.7m (b) v = -19.65 4
H.W: An object is thrown horizontally at 20m/s from a cliff top 45m above sea
level. Find (a)the time to land; (b)the angle at which it hits the water; (c)the speed
at which it hits the water.
Ans. (a)3.03s (b)Ø = -54.73 (c)35.79m/s

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