A2000-lb car drives from denver (altitude: 5280 feet) to los angeles (sea level). what is its change in potential energy, in btu? g = 32.174 ft/s² provide your answer rounded to one decimal place, and make sure to include units. *
2) the velocity of an object increases by 50% (v₂=1.5 v₁). by what factor does the kinetic energy increase? *
1
4
1.5
2.25

Explanation:

Loss of potential energy

= mgh

= 2000 x 5280 x 32.174

= 339757440 ft-poundal

1 BTU = 25036.86 ft-poundal

Loss of PE in BTU

= 339757440 / 25036.86

= 13570.3 BTU.

2 ) E = 1/2 m V²

When V increases to 1.5 V

E₁ = 1/2 m( 1.5V )²

= 2.25 X 1/2 m V²

= 2.25 X E.

Kinetic energy increases by a factor of 2.25.

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:

no

sodium is solid at rt