The black mamba is one of the world's most poisonous snakes, and with a maximum speed of 18.0 km/h, it is also the fastest. suppose a mamba waiting in a hide-out sees prey and begins slithering toward it with a velocity of +18.0 km/h. after 2.50 s, the mamba realizes that its prey can move faster than it can. the snake then turns around and slowly returns to its hide-out in 12.0 s. calculate a. the mambas average velocity during its return to the hideout. by. the mambas average velocity for the complete trip. c. the mamba's average speed for the complete trip.

Speed of the black Mamba = 18 km/h = 5m/s

now the distance that black mamba cover to catch prey

Now it returns to its hide in 12 s

so average speed of return is given as

Part b)

For the whole trip we know that displacement of the mamba is zero

so average velocity of whole trip will be zero

Part c)

For average speed we know that total distance of the black mamba

d = 12.5 + 12.5 = 25 m

total time taken = 2.5 + 12 = 14.5 s

now average speed is given as

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