Abaseball is thrown down a hill. this baseball has on-board sensors that can measure its velocities in both the x- and y- directions. the data show that the ball took off with an initial velocity in the y-direction of +4.0 m/s and had a final velocity of –5.8 m/s. calculate the hang time of the ball. [hint: believe it or not, it is possible to calculate hang time (the total time the projectile is in the air) by knowing only the initial and final velocities in the y-direction.]

1 s

Explanation:

Given

Initial velocity in Y-direction =+4 m/s

Final Velocity in Y-direction

Acceleration in Y-direction is 9.81

Using equation of motion

v=u+at

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia

a skateboard rolling across the street - apex