A student is studying the potential energy change of a 50 kg object raised 110 km above Earth's surface. What will be the percentage error if he simply used the approximate relation ΔU = mgΔy? Hint

The percentage error is given by 99.9 %

Explanation:

Given:

Mass of object kg

Height km

From the formula of potential energy,

Where

Here true value of potential energy,

Approximate value of student,

Absolute error is given by

    = true value - approximate value

    =

    =

Hence percentage error,

    %

    %

Therefore, the percentage error is given by 99.9 %

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:

a longitudinal wave moves energy that is to the direction of the wave’s movement. - true