A projectile of mass 0.50 kg is fired with an initial speed of 10 m/s at an angle of 60 degrees above the horizontal. The potential energy of the projectile-Earth system when the projectile is at its highest point (relative to the potential energy when the projectile is at ground level) is:

 U=18.75 J

Explanation:

given that

Mass ,m = 0.5 kg

Initial velocity , u= 10 m/s

angle, θ = 60°

The maximum height in the projectile motion h is given as follows

h=3.75 m

The potential energy is given as

U = m g h

U= 0.5 x 10 x 3.75 J

U=18.75 J

Therefore the potential energy at the highest point will be 18.75 J.

you have to draw the persons position over there

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: