Answer:
Explanation:
Length of the ladder, L = 10 ft
dx / dt = 0.9 ft/s
x = 6 ft
Let the angle is θ.
According to the diagram
x = L cosθ
Differentiate both sides with respect to t
At, x = 6 ft
Sin θ = 0.8
So,
0.9 = - 10 x 0.8 x dθ/dt
dθ/dt = - 0.1125 rad/s
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
There is not enough information given tl be able to solve this problem
Answer:
Explanation:before the phase change the substance is a particle.
Answer:
a. Moon around Earth.
Explanation:
Charon orbit takes around 6.4 earth days to complete its orbit. Charon does not rises or sets, it hovers over same spot around the Pluto. The same side of Charon faces the Pluto, this is called Tidal Locking.
The moon orbit takes around 27 days to complete its orbit. The moon has different sides that are faced with sun which creates light or dark face of moon on the earth. Moon has 384,400 km distance from the earth.