GENERAL PHYSICS 1

Please provide the best answers. (10 QS, letters only with brief explanation)

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22. How do molecules of water in an ocean wave move? a. move perpendicularly to the direction of wave travel c. move in circle b. move parallel to the direction of wave travel d. do not move at all 23. What do you call the number of waves passing through a given point each second? a. amplitude b. velocity c, earthquake d. vibration 24. What corresponds to the trough of a transverse wave in a sound wave? a. rarefaction b. compression c. amplitude d. wavelength 25. The speed of sound in air a. is zero c. decreases with temperature increase b. decreases with temperature decrease d. is unaffected by the change in temperature 26. Which of the following pairs has terms that are incorrectly matched? a. amplitude-loudness c. interference-beat b. waveform-intensity d. reflection-echo 27. Why is that during thunderstorm, the flash of lightning is seen before the thunderclap is heard? a. light travels faster than sound c. sound travels faster than light b. the lightning is produced first before the thunder d. the eye is more sensitive than the ear 28. Which frequency range is audible to the human ear? a. 20 Hz to 200 Hz c. 20 Hz to 20 000 Hz b. 20 Hz to 2000 Hz d. 20 Hz to 200 000 Hz 29. Pressure is dependent on and a. area, mass b. weight, mass c. mass, force d. Area, force 30. A lady stood on a weighing scale to measure her weight. She first stood on the scale with both feet on it. She then stood on the scale with just one foot on it. If she weighs 46 kg and the area of each foot in contact with the scale is 100 cm?, which of the following statements is true? a. The pressure exerted on the scale by one foot is two times the pressure exerted by both feet. b. The pressure exerted on the scale by one foot and both feet is the same. c. The pressure exerted double when both feet are placed on the scale. d. The pressure exerted on the scale is equivalent to her weight. 31. A show of a famous magician is lying on a bed of thousands of nails. The nails do not pierce his skin because: a. the nails decreases the area occupied by his back. c. his skin is thick. b. the nails increases the area occupied by his back. d. it is magic