Every exercise regimen should include both a warm-up and a cool down.
1 answer:
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Answer:
A) 1.96 * 10^-8 J
B) 2.55 * 10^-7 m
Explanation:
A) calculate the kinetic energy in eV of the recoiling Cs atom
we have to apply the principle of energy conservation and momentum
Initial kinetic energy of electron = 16 eV = 16 * (1.6 * 10^-19 ) J
Initial kinetic energy of atom = 0
therefore the final kinetic energy after collision ( E )
= [ 16 * ( 1.6 * 10^-19 ) ] + 0
= 1.96 * 10^-8 J
B) Determine the wavelength of the ultraviolet radiation
accelerating Voltage = 4.87 V
K.E = eV = 1.6 * 10^-19 * 4.87
next we will apply Planck's relationship
--------- ( 1 )
w = wavelength
h = 6.64 * 10^-34 J-S ( Planck's constant )
c = 3 * 10 ^8 m/sec ( speed of light )
KE = 1.6 * 10^-19 * 4.87
substitute given values into equation 1 above
w ( wavelength ) = 2.55 * 10^-7 m
<u>Answer:</u>
Plane is 1035.76 miles far away from the starting point.
<u>Explanation:</u>
First the plane flies 1.5 hours at 120 mph on a bearing of 10 degrees then it turns and flies 8.5 hours at the same speed on a bearing of 100 degrees.
So angle between the displacements = 100-10 = 90 degrees
Initial displacement = 1.5 *120 = 180 miles
Second displacement = 8.5*120 = 1020 miles
These two displacements are at 90 degrees, so final displacement =
So plane is 1035.76 miles far away from the starting point.