There are 8 neutrons and 8 protons in the nucleus of an oxygen atom.
The angles of incidence with respect to the normal will the x-rays reflect from the crystal will be
16.60 degrees. Given: wavelength of X-rays, λ= 0.120 nm
Distance, d=0.21 nm
According to Bragg’s diffraction law: nλ = 2dsinθ
thus, 0.120 = 2*0.21sinθ
or θ = (0.120/2*0.21)
or θ = 16.60 degrees.
Answer:
Speed of the car around the circular path will be 12 m/sec
Explanation:
We have given mass of the car m = 1500 kg
Radius of the curve r = 45 m
Centripetal acceleration of the car
We have to find the speed of the car
We know that centripetal acceleration is given by , here v is car speed along the circular path and r is radius of the curve
So
v = 12 m/sec
So speed of the car around the circular path will be 12 m/sec
<u>Answer: The model is described by :</u>
The strength of the field increases as you get closer to Earth, as shown by the smaller spaces between the circles.
Explanation :
According to universal gravitational law, the force acting in the universe between two objects is given by :
It is clear that the gravitational force depends directly on the product of masses and inversely on the square of the distance between them.
The given image shows a model of the gravitational field around Earth. The arrows in the image show the direction of the force. Gravitational field depends on the position of objects.
As we move closer to the earth, the force increases and hence the field increase.
So, the correct option is (D) " The strength of the field increases as you get closer to Earth, as shown by the smaller spaces between the circles ".