500cm3 of water is to be jeated from room temperature 28oc to 100oc in order to prepare ahot cup pf coffee. What os the minimum heat required

The minimum heat required is 171626 joules.  

Explanation:

By First Law of Thermodynamics, the amount of heat (), in joules, is equal to the change in internal energy of water. The minimum heat required is the sensible heat necessary to heat up the water. That is:

(1)

Where:

- Density of water, in kilograms per cubic meter.

- Volume of water, in cubic meters.

- Specific heat of water, in joules per kilogram-degree Celsius.

- Change in temperature, in degrees Celsius.

If we know that , , and , then the minimum heat required is:

The minimum heat required is 171626 joules.  

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:

distance = 150m

displ = root (50 ^2 + 100^2)

root(2500+10000)

root 125000