Hospital X-ray generators emit X-rays with wavelength of about 15.0 nanometers (nm), where 1nm=10−9m. What is the energy of a photon of the X-rays? Express your answer to three significant figures and include the appropriate units.
What is the longest wavelength (in nm) in the Paschen series of atomic spectra? Hint: 1nm= 10-9m a.) 18.79 b.) 1879 c.) 0.661 d.) 3.65 e.) 1.9 n=6 n=5- n=4 Brackett series E(n) to E(n-4) n=3. Paschen series E(n) to E(n-3) n=2. Balmer series E(n) to E(n-2) -1 Lyman series E(n) to E(n-1)
Macroscale Microscale Nanoscale 1x103 m 1x100m 1 m 1x10-3 m 1 mm 1x10-6 m 1 pm 1x10-9 m 1 km 1x10-12 m 1 pm 1 nm Sheet of Virus Thickness of a CD Atom paper Height of human Empire State Building Width of Plant Bacterial cell Aspirin molecule molecule Water AA battery cell 1 of 5 integer How many times taller are most people than a piece of paper (measured on its long side)? Enter an times taller than a...
A silicone monoxide (n=1.45) film of 100 nm thickness is used to coat a glass camera lens (n=1.56). What wavelength of light is the visible region (390 to 710 nm) will be most efficiently transmitted by this system? (1nm=10^-9m).
1. An enzyme with a Km of 1x10 % M was assayed using an initial substrate concentration of 3x10-- M. After 2 min, 5 percent of the substrate was converted. How much substrate will be converted after 10 min. 30 min. 60 min? How long must the reaction be run to achieve 99% conversion? (Assume that the enzyme follows Michaelis-Menten kinetics.)
A source of polarized light has a wavelength of 680 nm (680x10-9m), an intensity of 3.2 W/m², and is polarized at 17 degrees clockwise from the 12 o'clock vertical position. This source of polarized light passes through a polarized lens oriented at 50 degrees clockwise from the 12 o'clock vertical position. a) What is the intensity of the light after passing through the polarized lens? b) What is the frequency of the light?
1. Determine if each solution is acidic, basic, or neutral. a) [H,0+1=1x10-SM:[OH-]=1x10-'M b) [H,0"]=1x10M;[OH-]=1x10-8 M c) [H,0*3=1x10-'M;[OH-]=1x10-?M 2. Calculate [H,0*1 given [OH') in each aqueous solution and classify each solution as acidic or basic. a) [OH"]=2.7x10-12 M b) [OH-]=2.5x10-?M c) [OH-]=3.3x10-4M
suppose 50.00 ml of a 1x10^-7 M solution of lead(II) nitrate is mixed with 50.00 ML of a 1X10^-8 solution of sodium phosphate which of the following statement is true? for lead(II) phosphate, Ksp=1x10^-44 Options: a: no precipitate forms because Qc<Ksp b no precipitate forms because Qc>Ksp c a precipitate forms because Qc<Ksp d a precipitate forms because Qc>Ksp e no precipitate forms because they are Qc=Ksp
QUESTION 2 The wavelength of a certain laser is 0.35 micrometers where 1 micrometer-1x10-6 m. Express this wavelength in nanometers. 3.5 x 104 nm 3.5 * 10nm 3.5 * 102 nm 3.5 103 nm וח
List these from longest to shortest: 1 mi 10 meters 1x10^5 nm 1000 inches