Answer: first option, the work output of the hairdryer will be less than the work input.
Explanation:
1) The work output measured in watts is the power of hair dryer measured in joules per second.
2) The hair dryer converts electrical energy from the wall outlet to mechanical and thermal energy: hot wind.
3) Nevertheless, you can never expect a 100% efficiency of the machines: due to friction, some energy is converted into useless energy.
So, efiiviency = power output / power input< 1 ⇒
power output = work output / time
input power = work input / time
⇒ work output / work input < 1
⇒ work output < work input.
Which is the first option: the work output of the hairdryer will be less than the work input
Ionic compounds. because when in solid form they are held firmly in place therefore they cannot move to conduct electric current.
The speeds are
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25 m/s.
Vavg = 15 + 16 + 17 + 18 + 19 + 20 +21 +22+ 23+24+ 25 / total molecules = 20 m/s
Vrms = ((sum of square of speed of molecules ) / total molecules )^1/2
Vrms = ( (15^2 + 16^2 + 17^2 + ....25^2) / 11 )^1/2
= (225+ 256 + 289 + 324 + 361+ 400 + 441 + 484 + 529 +576 +625 / 11)^1/2
= (4510 / 11 )^1/2 = 20.25 m /s
