Tourist takes a trip in hot air balloon . the hot air balloon is moving vertically upwards at a constant speed of 44m/s. at the height of 20m she drops the camera by accident over the side of the balloons basket. How do you calculate displacement covered by the camera after 2 seconds

68.4 m

Explanation:

We are given;

Height; y_o = 20 m

Speed; u = 44 m/s

Time; t = 2 s

To solve this, let's first of all find the position of the camera at a time of seconds after its release.

We will use one of Newton's equation of motion;

y(2) - y_o = ut - ½gt²

Negative sign is used on the right hand side because motion is against gravity.

Thus;

y(2) = y_o + ut - ½gt²

y(2) = 20 + (44 × 2) - ((1/2)(9.8)(2²))

y(2) = 88.4 m

Therefore displacement after 2 seconds will be;

y = 88.4 - 20

y = 68.4 m

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:

number of electrons for neutral cl