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Questions in physics

[Answered] Which object will sink in freshwater, which has a density of 1.0 g/cm³?

[Answered] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Answered] Listen. The fuel efficiency of a car decreases as tire pressure decreases. What's the independent variable in the situation? A) Fuel efficiency B) The price per gallon of gas C) The speed of the car D) Tire pressure

[Answered] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Answered] Select the correct answer. Ian performs an experiment on an electric circuit. He increases the voltage from 25 volts to 50 volts while keeping the resistance constant. What will be the effect of doing this on the current? A. The current will increase. B. The current will decrease. C. The current will stay constant. D. The current will stop flowing.

[Answered] Compressions and rarefactions of sound waves normally travel A. at reduced frequencies. B. none of the above C. in opposite directions. D. at different speeds. E. all of the above

[Answered] The speed of a sound wave in air depends on A. all of the above B. the air temperature. C. its wavelength. D. none of the above E. its frequency.

[Answered] Explain why a glass container with thick walls is more likely to crack than one with thin walls when a very hot liquid is poured into each of the glasses.

[Answered] What technology do scientists use to measure ocean depth? A. laser B. rope C. submersible D. sonar

[Answered] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?