Two friends, burt and ernie, are standing at opposite ends of a uniform log that is floating in a lake. the log is 3.8 m long and has mass 300 kg. burt has mass 35.0 kg and ernie has mass 30.0 kg. initially the log and the two friends are at rest relative to the shore. burt then offers ernie a cookie, and ernie walks to burt's end of the log to get it. relative to the shore, what distance has the log moved by the time ernie reaches burt? neglect any horizontal force that the water exerts on the log and assume that neither burt nor ernie falls off the log.

express your answer to two significant figures and include the appropriate units.

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

get the total number of pieces of fruit and divide it by 4 to get the average. the result is the answer to the problem. 14 total number of fruits and there are 4 members. 14 divided by 4 is equals to 3.5.

it's a b and

the best answer for these questions would be:

1.            c. is smaller

2.            d) concrete operational

3.            b) interaction with the environment – the children interact with their environment can them learn more.

4.            a) parents who reason openly with children can limit a child’s cognitive ability.