If the atom is neutral, then the number of electrons will ALWAYS be the same as the number of protons (which is the atomic number), so in this case the number of protons is 16, and that make the number of electrons 16
Answer:
Let the volume of the cube be V and the fraction of cube outside water be f.
Thus, volume of ice inside water = volume of water displaced =(1−f)V
Under equilibrium,
Weight of ice = Weight of water displaced
⟹Vρ
ice
g=(1−f)Vρ
water
g
⟹(1−f)=
10
9
⟹f=
10
1
Thus, the percentage of volume outside water =10%
Answer:
option B
Explanation:
given,
two plane are moving in same altitude at a distance of 1.0 km apart.
angle of depression of the two planes given are 45° and 37°
now, the diagram is attached below
using diagram,
now in ΔAOC
tan 45° =
x = h..................(1)
now using triangle ΔBOD
tan 37° =
from equation (1)
0.754 =
0.754 h + 753.56 = h
0.246 h = 753.56
h = 3063.5 m
hence, the correct answer is option B
Answer
given,
angular speed of the tub = 5 rev/s
time = 9 s
he tub slows to rest = 15.0 s
the angular acceleration
angular displacement
case 2
now,
time = 15 s
the angular acceleration
angular displacement
total revolution in 24 s
= 23 + 38
= 62 revolution
Answer:
21 mpg
Explanation:
So the distance in miles that his car could cover within gas fill up is the difference in odometer reading
d = 54008 - 53762 = 246 miles
So if it takes 11.8 gallons of gas to cover 246 miles then his mile per gallon can be calculated as
246 / 11.8 = 20.85 mpg