2points
what is the frequency of an electromagnetic wave with energy of 5.0 x 10-20
j?
o
a. 7.55 x 1013 hz
b. 5.22 x 105 hz
c. 3.98 x 10-6 hz
d. 1.67 * 10-28 hz
o
o
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V = 7.55 x 10∧13 Hz (A)

Explanation:

E= hv

E is energy

h is constant (6.626 x 10∧-34)

v= frequency

V = E/h

V = (5 x 10 ∧ -20) / ( 6. 626 x 10∧-34) = (5/6.626 ) x 10∧ -20-(-34)

V = 0.75460307878 X 10∧-20+34 = 0.75460307878 x 10∧14

V = 7.55 x 10∧13 Hz (A)

The frequency is 7.55 *10^13 Hz (option A)

Explanation:

Step 1: Data given

Energy = 5.0 * 10^-20 J

Planck's constant = 6.626 * 10^-34 J*s

Step 2: Calculate the frequency

E  = h *f

⇒ Energy =  5.0 * 10^-20 J

⇒ h = Planck's constant = 6.626 * 10^-34 J*s

⇒ f = The frequency (in Hz) = TO BE DETERMINED

f = E/h

f= 5.0 * 10^-20 J / 6.626 * 10^-34 J*s

f = 7.55 *10^13 Hz

The frequency is 7.55 *10^13 Hz (option A)

its first and third is your answer i did the qustion the fourth isnt right

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.