Answer:
Incomplete question
This is the complete question
The Earth possesses an electric field of (average) magnitude 150 near its surface. The field points radially inward. Calculate the net electric flux outward through a spherical surface surrounding, and just beyond, the Earth's surface.
Explanation:
Given that,
Electric field is 150N/C inward
i.e E = - 150 i
Then, electric flux (Φ) is given as
Φ=∮E.dA
Surface area of a sphere is
A=4πr²
dA=8πr dr
The area is outwardly i.e
dA=-8πr dr i
Φ=∮E.dA
Φ=∮-150 i • 8πr i dr from 0 to R
Φ= -1200π∮rdr. From 0 to R
Φ= -1200π r²/2. From 0 to R
Φ= -600π [R² -0²]
Φ= -600πR²
Where R is radius of earth which is 6,400,000m
Φ= -600πR²
Φ= -600π(6400000)²
Φ= -7.72×10^16 Nm²/C
The answer is A because the distance covered is equal time intervals is the same or equal.
Explanation:
It is given that,
Velocity in East,
Velocity in North,
(a) The resultant velocity is given by :
(b) The width of the river is, d = 80 m
Let t is the time taken by the boat to travel shore to shore. So,
t = 16 seconds
(c) Let x is the distance covered by the boat to reach the opposite shore. So,
x = 48 meters
Hence, this is the required solution.
Because the three different states are each is more spread out for example water when water is a liquid is not very compact so it is not very dense but if you boil the water it becomes less deses because the atom spread out meaning there is less matter in the same volume. And if you freeze water with no air in it it becomes ice, ice is more compact because to be solid it has to be more compact meaning more atom in the same volume. That is why matter in different states has different densities