physics

(a) in joules and __x 10^__J

(b) in eV __

2.) Thompson determined the charge-to-mass ratio of the electron to be −1.76 × 1011 coulomb/kilogram. Millikan determined the charge on the electron to be −1.60 × 10−19 coulomb. According to these findings, what is the mass of an electron?

__x10^___kg

3.) An electron with mass 9.11 × 10−31 kg has a velocity of 4.30 × 105 m/s in the innermost

orbit of a hydrogen atom. What is the de Broglie wavelength of the electron? __x10^_m

4.) Use chemical symbols and numbers to identify the following isotopes:

(a) Potassium−39 :

(b) Neon−22 :

(c) Tungsten−184 :

(d) Iodine−127 :

5.) Referring to the figure below, how much energy is needed to move an electron in a

hydrogen atom from n = 5 to n = 6? Give the answer

(a) in joules and __x10^__J

(b) in eV ____eV

6.) How much energy is required to completely remove the electron from a hydrogen atom in the ground state? E___eV

7.) If the charge-to-mass ratio of a proton is 9.58 × 107 coulomb/kilogram and the charge is 1.60 × 10−19 coulomb, what is the mass of the proton?__x10^__kg

8.) A neutron with mass 1.68 × 10−27 kg moves from a nuclear reactor with a velocity of 9.51 × 103 m/s. What is the deBroglie wavelength of the neutron?__x10^__m

9.) At a particular location and time, sunlight is measured on a 1.00 square meter solar collector with an intensity of 1,178.0 W/m2. If the peak intensity of this sunlight has a wavelength of 5.60 × 10−7 m, how many photons are arriving each second? __x10__ photon/second

10.) Light passes through a transparent substance at a speed of 2.256 × 108 m/s.

Based on the following table, what is the material?

11.) What is the energy of a photon of ultraviolet radiation with a wavelength of 1.52 × 10−7 m?___x10^__J

12.) What is the frequency of light with a wavelength of 8.20 × 10−7 m?__x10^__Hz

13.) To the nearest hundredth of a second, how much time is required for reflected sunlight to travel from the Moon to the Earth if the distance between the Earth and the Moon is 3.91 × 105 km? ___s answer must be in s

14.) To the nearest hundredth of a minute, how many minutes are required for a radio signal to travel from the Earth to a space station on Jupiter if the planet Jupiter is 5.9 × 108 km from the Earth? __min

15.) What is the energy of a photon of wavelength 9.73 mm? __x10^__J

16.) At a particular location and time, sunlight is measure on a 1.00 square meter solar collector with an intensity of 1,210.0 W/m2. If the peak intensity of this sunlight has a wavelength of 5.60 × 10−7 m, how many photons are arriving each second? __x10^__ photon/s

17.) At a particular location and time, sunlight is measured on a 1 m2 solar collector with a power of 1,213.0 W. If the peak intensity of this sunlight has a wavelength of 5.58 × 10−7 m, how many photons are arriving each second? __x10^__ photon/s

18.) A light wave has a frequency of 7.57 × 1014 cycles per second.

(a) What is the wavelength? __x10^__m

(b) (b) According to the table below, what color would you observe?

19.) How much greater is the energy of a photon of ultraviolet radiation (λ = 3.00 × 10−7 m) than the energy of a photon of sunlight (λ = 5.60 × 10−7 m)?

__ x 10 ^___J