Hi can I have some help with these physics questions please? 1. Which of the following sentences is not a property of electromagnetic radiation? A. Electromagnetic radiation can knock an electron out of a metal regardless of its frequency. B. Electromagnetic radiation can have both wave and particle properties C. Electromagnetic radiation waves will change the speed in different mediums D. Electromagnetic radiation is made up of electric and magnetic fields that are perpendicular to the direction of wave propagation. 2. If electromagnet radiation had a wavelength of 6.8x10^-7m then the period of this electromagnetic radiation expressed in scientific notation? a.bx10^-c. Record the values of ab and c. This type of electromagnetic radiation is? 3. An object that is 45cm tall is placed 35cm in front of a particular mirror, it's virtual image in the mirror is upright and 100cm tall. The mirror is ___ and the objects image is located ___ away from the mirror. A. 1)= convex 2= 16cm B) 1= convex 2= 78cm C) = 1= concave 2= 16cm D= concave 2= 78cm 4. Visible light that had a wavelength of 6.50x10^-7m in air, is directed into obsidian. The index of refraction of obsidian is 1.76. The wavelength of this light inside the obsidian is expressed in scientific notation, is a.bcx10^-7m. Record the answers for a b and c. 5. Light travelling through water into glass experiences a decrease in speed. Water has a refractive index ____ than glass so the light ray will bend ____ the normal. A. 1= greater 2= toward B. 1= greater 2= away from C. 1= less 2= toward D. 1= less 2= away from 6. At what distance above this page would a convex magnifying lens that has a focal length of 7.00cm have to be held for the image of the letters to appear upright and 3 times as tall? A. 4.67cm B. 2.33cm C. 9.33cm D. 10.5cm 7. A metal had a work function of 3.10x10^-19J. Light with a frequency of 7.11x10^14Hz is incident on the metal. The stopping voltage is? 8. If the stopping potential of a photocell is 4.52 V, then the maximum kinetic energy of the photoelectron emitted is? A. 7.23x10^-19J B. 4.52J C. 2.83x10^19 D. 3.54x10^-20J 9. A proton is moving at 2.5x10^6 m/s to the right across your screen when it encounters a 3.7 10^-3 T magnetic field that is perpendicular to its direction of travel. What is the radius of the circular path the proton makes? A. 3.9x10^-3m B. 1.1x10^-5m C. 2.5x10^-2cm D. 7.1m 10. Supported by the Compton effect, deBroglie hypothesized the concept of: A. Wave particular duality. B. The wave nature of matter C. The particular nature of light D. The particular nature of matter 11. The significance of Yonge's experiment was that it provided evidence that light has: A. Mass B. Momentum C. Wave properties D. A speed of 3x10^8 m/s