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The song "Hot n Cold" by Katy Perry features instruments such as drums, Bass Guitar, Electric Guitar, synthesizers, and keyboards. These instruments work together to create a catchy pop sound that complements the song's upbeat and playful lyrics.

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1y ago

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What instruments used in hot N Cold?

Some of the instruments used in "Hot N Cold" by Katy Perry include drums, synthesizers, guitar, and bass. The song also features various electronic effects and production elements to create its energetic pop sound.


What is the ideal efficiency of a heat engine that operates with its hot reservior at 500k and its sink at 300k?

The ideal efficiency of a heat engine operating between a hot reservoir at 500 K and a cold reservoir at 300 K is given by the Carnot efficiency formula: Eff = 1 - (Tc/Th) where Tc is the temperature of the cold reservoir (300 K) and Th is the temperature of the hot reservoir (500 K). Plugging in the values, the efficiency would be Eff = 1 - (300/500) = 1 - 0.6 = 0.4 or 40%.


How are forces measured and what instruments are used for this purpose?

Forces are measured using instruments called force gauges or dynamometers. These instruments typically use a spring or strain gauge to measure the amount of force applied to them. The force is usually measured in units of newtons (N) or pounds (lb).


Why is hot air lighter than cold air?

Because its density is lower. At constant pressure, a given volume of hot air thus weighs less than the same volume containing colder air. ---------------------------------------- remark: This can be easily seen from the equation for ideal gases p*V = n*R*T, with p: pressure V: volume n: number of particles within the given volume R: ideal gas constant T: Temperature


How are heat energy and atoms molecules related?

the faster the atoms move the more space they need n the more heat they produce . the slower the atoms move they less room they need n the colder an object is. examples: think of steam hot it expands n needs to escape the tea pot or what ever n moves fast enough to make that noise. my teacher used an examples of students. atoms don't wanna bump into each other so lets say if the atoms (kids) were to walk around the room nice n calm we could do that without bumping into each other n we wouldn't get hot n sweaty. but if we were to run around the class room we would start getting hot n bump into each other n need more room n expand. n yeah that's all i know :)