Answer:
32 bottles
Explanation:
If we create a free body diagram on the child we have his weight and the bouyant force
W-B=0
They must be equal to mantain equilibrium on the body and he can stay floating, this force is equivalent to the weight of water displaced
W=B=Ww
Mg=mg
32 kg=mass of water displaced
1 kilogram per liter (kg/L) is the density of water, this means that 32 Liters of water are displaced and since the bottles can retain 1 liter, the child needs 32 bottles
Answer:
(d) 2930 lbs
Explanation:
Given:
Force acting in the westerly direction is,
Force acting in the northerly direction is,
Now, as the two given directions are at right angles to each other, the angle between the two force vectors is 90 degrees.
So, when two vectors are at right angles, their resultant magnitude is given as:
Plug in the given values and solve for resultant 'R'. This gives,
Therefore, the magnitude of the resultant force upon the piling is 2930 lbs.
So, option (d) is correct.
Answer:
B) below the plane and behind it.
Answer:
I know 1, that is in the case of a burning of a candle.
Explanation:
Any vector can be written as components along positive X and positive Y axes.
So vector A can be written as , where is the angle between vector A and positive X axis
So vector A =
So components of vector B along X -axis =5 cm
along Y-axis = 8.667 cm