Answer:
stone A is diamond.
Explanation:
given,
Volume of the two stone = 0.15 cm³
Mass of stone A = 0.52 g
Mass of stone B = 0.42 g
Density of the diamond = 3.5 g/cm³
So, to find which stone is gold we have to calculate the density of both the stone.
We know,
density of stone A
density of stone B.
Hence, the density of the stone A is the equal to Diamond then stone A is diamond.
X- rays are used to see through luggage at airports and it is also used to see bones inside your body in the doctor's... Hoped this helped... I'm not that great
Answer : The correct option is, (D) Surface tension is caused by cohesion between water molecules on the surface.
Explanation :
Surface tension : It is caused by the cohesion between water molecules on the surface or we can say that it is a tension of the surface of liquid caused by the attraction of the particles which are present on the surface layer by the bulk of the liquid, which tends to minimize surface area.
And due to the surface tension phenomena the shape of the water molecule tend to assume a spherical shape to attain the minimum surface area.
Hence. the correct option is, (D) Surface tension is caused by cohesion between water molecules on the surface.
Answer:
Residence time = 5000 years
Explanation:
Given that ;
the mass of oxygen in the atmosphere = 1.4 million gigatons = 1.4 × 10⁶ gigatons
Major sources of oxygen to atmosphere include:
Photosynthesis by plants on land = 125 gigatons/yr
Photosynthesis by plants in ocean = 155 gigatons/yr
Total rate of oxygen = (125 + 155) gigatons/yr
= 280 gigatons/yr
the residence time of oxygen in the atmosphere is therefore calculated by the formula:
Residence time =
Residence time =
Residence time = 5000 years