Suppose you built a scale-model atom in which the nucleus is the size of a tennis ball. About how far would the cloud of electrons extend?
A) several kilometers B) several centimeters
C) a few meters D) to the Sun
A
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An electron is fired through a pair of deflection plates, which produce a 2.00 cm long region with an electric field of 4000 N/C perpendicular to the electron's initial velocity. If the initial speed of the electron is 
what angle will its new velocity make with the direction of the original velocity?
A. 14
B. 8.0
C. 5.5
D. 4.6
D. 4.6
Compton Scattering: An 18.0 pm wavelength photon is scattered by a stationary electron through an angle of 120°. What is the wavelength of the scattered photon? (melectron = 9.11 × 10-31 kg, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s)
A. 19.2 pm B. 20.4 pm C. 21.6 pm D. 22.9 pm E. 24.1 pm
You push on a block on frictionless ice with a force of 8 N, causing it to accelerate at 2 m/s2 . The mass of the block is __________
Fill in the blank(s) with correct word
The specific gravity of a substance is the ratio of the density of that substance to the density of water at 6.0°C
Indicate whether the statement is true or false