a) volume in cm³ = 20 × 42 × 42 = 35280 cm³
b) volume in m³ = 0.2 × 0.42 × 0.42 = 0.03528 m³
c) volume in ml³ = 200 × 420 × 420 = 35280000 ml³
d) volume in litres = 0.02 × 0.042 × 0.042 = 0.00003528 l³
e) Density = Mass / Volume
Mass = Volume × density
= 0.00003528 × 1
= 0.00003528 × 1000
= 0.03528 grams
f) Mass in kilo gram = 0.00003528 kg
Answer:
当物体相互接触时，作用在物体上的力有六种：法向力、外加力、摩擦力、张力、弹簧力和阻力。这些力使物体改变它们的运动或运动，即从一个地方移动到另一个地方的行为。
The answer is D. To test the growth of alfalfa plants with and without nitrogen rich fertilizer
There are 46 chromosomes or 23 pairs of homologous chromosomes (:
