21. A boat has a maximum speed of 5.0 m/s in still water. The boat heads East across a 300 m river that flows South at 2.5 m/s.
a. Find the time it takes to cross the river
b. Find the distance the boat travels downstream
c. Find the resultant velocity

it is because acrylic blanket have acrylic textile fiber

explanation:

its is better than wool blanket

i believe the answer would be:

d. violin, clarinet, french horn, and tuba

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s

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