In which of the Earth's layers are diamonds formed? -
Diamonds form in the Earth's mantle, a thick layer between the thin crust and Earth's metal core.
Answer:
r = 9.92 mm
Explanation:
Given that,
Mass of oil drop,
It acquires 2 surplus electrons, q = +2e
Potential difference, V = 620 V
Thie potential difference is applied between the pair of horizontal metal plates the drop is in equilibrium.
We need to find the distance between the plates.
At equilibrium,
mg = qE
Since, E = V/r (r is distance between plates)
So, the distance between the plates is 9.92 mm.
Answer:
The formula for potential energy depends on the force acting on the two objects. For the gravitational force the formula is P.E. = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 m / s2 at the surface of the earth) and h is the height in meters.
Answer:
v = 14.87 m/s
Explanation:
Given that
Initial speed ,u= 9.2 m/s
θ = 4°
Distance d= 100 m
Lets speed after traveling 100 m is v.
From the diagram
h = d sinθ
h = 100 sin 4°
h = 6.97 m
We know that
v = 14.87 m/s
Answer:
Half life refers to the time for 1/2 of the radioactive atoms to decay.
Suppose that X has a half life of 10 days and Y has a half life of 20 days
If both start out with 1000 radioactive atoms then after 20 days
X would have 250 radioactive atoms and Y would have 500 atoms
The rate of decay is greater for the shorter half life:
In the example given X must have the smaller rate of decay because it has a longer half life.