Temperature is an indirect measurement of

a. heat flow
b. friction
c. potential energy
d. the speed of molecules

D. The speed of molecules

Explanation:

The temperature of a substance is directly related to the speed of the random motion of the molecules inside the substance: the faster the molecules move, the higher the temperature of the substance.

This relationship can be even quantified. For instance, for an ideal monoatomic gas, the average kinetic energy of the atoms inside the gas () is related to the absolute temperature of the gas (T) by the equation

where k is the Boltzmann constant. However, we know that the kinetic energy is related to the average speed of the molecules by

where v is the speed: therefore, the temperature is an indirect measurement of the speed of the molecules.

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation: