Physics, 27.07.2019 17:30 yaneth0310p8flas
Jack is testing how sound travels. damon stood on the opposite side of the room and whispered a sentence to him. then, jack held a balloon to his own ear as damon whispered the sentence to him again. jack heard the sentence better the second time. how did the balloon affect the sound of damon's whisper? a) the latex the balloon is made of makes sounds seem louder. b) there is no air pressure inside the balloon, so it created a vacuum that made the sound louder. c) the pressure inside the balloon is less than the pressure inside jacks's ear, making the sound echo the second time. d) sound travels better through the compact molecules of air inside the balloon than the less compact molecules on the outside.
Answers: 1
Physics, 22.06.2019 11:30, Gigglygoose4181
1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? yourunits 3. a clothes dryer uses about 2 amps of current from a 240 volt line. how much power does it use? yourunits 4.
Answers: 1
Physics, 22.06.2019 22:20, bryanmcmillianjr
Which symbol in the first law of thermodynamics represents the sum of the chemical and thermal energy stored in atoms and molecules? a. q b. w c. v d. u
Answers: 3
Physics, 23.06.2019 01:30, kaylaamberd
The ideal gas model is valid if which of the following conditions is true? the gas density is low. the gas density is high. the temperature is low. the temperature is high. the gas density and the temperature are low. the gas density and the temperature are high. the gas density is high and the temperature is low. the gas density is low and the temperature is high.
Answers: 3
Physics, 23.06.2019 11:10, leothedrifter
In the “analyzing the problem” step in the problem solving process, one should evaluate the causes, effects, and symptoms of the problem. select the best answer from the choices provided t f
Answers: 3
Jack is testing how sound travels. damon stood on the opposite side of the room and whispered a sent...
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