4. The efficiency of a machine is always less than 100 percent because (1 point)
a machine cannot have an IMA (ideal mechanical advantage) greater than 1.
some work input is lost to friction.
the work input is too small
the work output is too great.

Iupil u5l aluve time remaining 01: 53: 45 ei and both agreed that childhood experiences play an important role in the development of oneself a sigmund freud alfred adler b. carl jung alfred adler c. carl jung erik erikson d. sigmund freud.. carl jung select the best answer from the choices provided save and exit next submit mark this and return

The heater element of a 120 v toaster is a 5.4 m length of nichrome wire, whose diameter is 0.48 mm. the resistivity of nichrome at the operating temperature of the toaster is 1.3 × 10-6 ω·m. the toaster is operated at a voltage of 120 v. (a) what is the power drawn by the toaster? (b) if the cost of electricity is 12 ¢ per kilowatt-hour, and it takes 2 minutes to toast bread, how much does it cost for toasted bread? (c) when the heater element is at room temperature, is the resistivity in the nichrome wire greater than, less than, or equal to it’s resistivity when at operating temperature? explain.

Awave has a wavelength of 7 mm and a frequency of 19 hertz. what is its speed?