Heat is transferred in a gas through

friction
conduction
convection
radiation

a unit for measuring frequency, equal to one cycle per second. if a sound wave has a frequency of 20,000 hz, this means that 20,000 waves are passing through a given point during the interval of one second.

data given:

fh=400n

ftruck=1760n

data needed:

u=?

formula needed:

fh=ftruck×u

solution:

u=fh/ftruck

u=400n/1760n

u=0,227272727

question:

newton's second law states that f = m x a (force is mass times acceleration). which example would have the greatest acceleration?

a) a 10 kg ball thrown with a 50 newton force

b) a 1 kg ball thrown with a 0.5 newton force

c) a 50 kg student launched by a 100 newton catapult

d) a 500 kg car accelerated by 1000 newtons from the engine

answer:

let's calculate each acceleration, from m = f/a:

a) 50n/10kg = 5 m/s^2

b) 0,5n/1kg = 0.5 m/s^2

c) 100 n/50kg = 2m/s^2

d) 1000n/500kg= 2m/s^2.

so the answer is option a.

really hope this