Respuesta :
Answer:
1. Which of the following gives good evidence for the particle nature of EM radiation?
-photoelectric effect
2.Which of the following gives good evidence for the wave nature of EM radiation?
-interference patterns
3.When studying the photoelectric effect, which parameters did scientists think were relevant for electrons to be released or not in both the wave and particle models?
-frequency and intensity for the wave model; frequency only for the particle model
4.The image represents the gaps between allowed energy levels for electrons. Which model best describes this phenomenon?
-the particle model because the arrows represent discrete particle-like jumps
5. Which subatomic particle has the smallest mass?
-electron
6.The atomic number on the periodic table refers to the number of _____ within an atom.
-protons or electrons
7.Considering that an up quark has a charge of +23 and a down quark has charge of −13, which of the following represents the correct quark combination for a proton?
-2 up, 1 down
8. If an atom gives off electromagnetic radiation with a frequency of 2.0×1015s−1, what is the radiation’s energy?
-1.3×10−18 J
9. A nuclide of phosphorus 3015P decays into a nuclide of silicon 3014Si. In order to satisfy charge conservation and lepton number conservation the other products must be __________.
-a positron and an antineutrino
10.In a gamma decay process __________.
-a parent nuclide was in an excited state
11.Nuclide X has a higher rate of decay than nuclide Y. Based on this information, which of the following statements must be true?
- Nuclide Y has a larger half-life than nuclide X.
12. A microwave has a typical wavelength of about 0.1 meter. What is the comparable wavelength of a radio wave?
-Greater than 0.1 meter.
13.A satellite phone can be used to place a call from virtually anywhere in the world. What type of wave does the satellite phone likely transmit to the satellite orbiting above Earth?
-radio wave
14.The speed of a light wave c is related to its wavelength λ and its frequency f by c=λf. If the speed of light is 3×108 meters/second and the wavelength of an infrared wave used in a remote control is 7×10−9 meters, then what is its frequency?
-4×1016 Hz
15.In what way does a lead apron protect human cells from X-rays?
-In what way does a lead apron protect human cells from X-rays?
16.Why are children more susceptible to the effects of ionizing radiation?
-They have many growing cells that can easily have DNA damaged.
17.Which statement is correct about the half-lives of radioactive elements?
-The half-lives of radioactive elements vary from fractions of a second to billions of years.
18.Source A has a half-life of 10 million years, and source B has a half-life of 5 million years. After 10 million years, what percent of each source remains?
-50% of source A and 25% of source B
19.The probability that a randomly chosen nucleus in a radioactive sample will have decayed in a given time is 96.875%. How many half-lives has the sample experienced?
-5
20.A radioactive sample starts with 800,000 undecayed nuclei. After 12 hours, 700,000 of the nuclei have decayed. What is the half-life of the sample?
- 4 hours
21.How did the development of electrical signals sent through wires change communication?
-Signals could be sent anywhere a wire could reach and no longer were restricted to line of sight.
22. Essay
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Explanation:
100% correct
One phenomenon which well presents the idea of wave particle duality is the photoelectric effect.
What is wave particle duality?
The term wave particle duality has to do with the fact that a wave can behave sometimes as a wave and sometimes as a particle. This was well established by the work of De Broglie.
One phenomenon which well presents the idea of wave particle duality is the photoelectric effect.
Learn more about wave particle duality:https://brainly.com/question/14953274
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