HANDWRITTEN ANWERS ONLY (NOTEXT)

HANDWRITTEN ANWERS ONLY (NOTEXT)

HANDWRITTEN ANWERS ONLY (NOTEXT)

1. A child being pushed on a swing goes higher with each push. This is an example of A. A progressive wave B. A standing wave 0. Resonance D. Diffraction 2. Which one of the following properties of a wave can change when it is reflected? A. Wavelength B. Frequency C. Period D. Amplitude 3. Which of the following security mirrors will provide the best visual coverage in a shop? A. It is a convex mirror B. It is a plane mirror C. It is a concave mirror D. It can be all the above 4. A cup of coffee, originally at 80 C sits on a bench in a room that is at 20 C. Which of the following most accurately describes what happens? A. The temperature of the coffee will cool to slightly below the 20 C B. The temperature of the coffee will cool to exactly 20C C. The final temperature of the coffee depends on how well insulated the cup is D. The temperature of the coffee will cool to slightly above 20 C5. Boiling water results in steam formation at the same temperature. Which one of the following has changed for the water molecules in the steam? A. The average kinetic energy of the particles B. The average potential energy of the particles C. The particles have less energy and move slower D. The total number of particles 6. A plastic ruler when rubbed on yourjeans becomes negatively charged. What is the net charge on the part of your jeans that you rubbed with the ruler? A. Negative B. Zero G. Positive D. Cannot be determined from the information ?. Which one of the following is likely to lower the resistance of a conductor made of a particular metal? A. Increase the temperature of the conductor 8. Lengthen the conductor C. Shorten the conductor D. Decrease the cross-sectional area Of the COHGUC'EDF 8. Two long straight wires are carrying a current in opposite directions as shown in the diagram bellow {viewed end on) Which of the following best describes the magnitude and direction of the magnetic field at a point exactlyr midway between the two wires? A. The field is zero B. The field is greater than that due to a single wire and is directed towards the top of the page C. The field is greater than that due to a single wire and is directed towards the bottom of the page D. The field is less than that due to a single wire and could be directed either towards the top or the bottom of the page 9. A device counting electrons that are moving in metal wire measures 6.3 X 10"3 electrons passing a point in a time of 10 seconds. The current due to this movement is closest to A. 0.1 mA B. 1mA C. 10mA D. '100 mA 10. Which of the following is the best description of the refractive index of a material? A. The ratio of the speed of light in a vacuum to the Speed of light in the material. The ratio of the speed of light in the material to the speed of light in a vacuum. The ratio of the speed of light in the material to the speed of light in a reference material. The ratio of the speed of light before reection to the speed of light after reflection