Un vehículo circula a una velocidad constante de 72 km/h. Expresa su velocidad en el S. I. y halla el espacio que recorre en 15 minutos.

44.71 mi/h

11.17 mi

Explanation:

To express the velocity in the S.I. you use the following equality:

then, by replacing you obtain:

When the car has traveled while 15 minutes you have:

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TRANSLATION:

Para expresar la velocidad en el S.I., utiliza la siguiente igualdad:

entonces, al reemplazar, obtienes:

Cuando el automóvil ha viajado durante 15 minutos, tiene:

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:

heats surface water up