Answer:
ionized particles from the sun.
* interactions in radiation belts.
* the friction of the planet in the solar wind
q = +9 10⁵ C
Explanation:
Due to being made up of matter, the planet Earth has a series of positive and negative charges, in general these charges should be balanced and the net charge of the planet should be zero, but there are several phenomena that introduce unbalanced charges, for example:
* ionized particles from the sun.
* interactions in radiation belts.
* the friction of the planet in the solar wind
This creates that the planet has a net electrical load
We can roughly calculate the charge of the planet
E = k q / r²
q = E r² / k
let's calculate
q = 200 (6.37 10⁶)²/9 10⁹
q = +9 10⁵ C
Answer:
W = -148.8 J
Explanation:
given,
mass = 9.2 kg
initial speed = 1.42 m/s
pulling force = 94 N
angle θ = 19.6°
coefficient of kinetic friction = 0.400
the crate is pulled = 4.92 m
to calculate of work done by the gravitation force
gravitation force
W = ( m g sin θ ) x
W = 9.2 × (-9.8) × sin 19.6° × 4.92
W = -148.8 J
Work done by the gravitation force is taken as negative because gravitation force act opposite to the force applied.
Because gases flow easily. A hot batch of gas can rise through
the surrounding gas a lot easier than, say, a hot batch of mud can
rise through the surrounding mud.
Answer:
e. is definitely zero
Explanation:
Given that
At initial condition the speed of the pop cans is zero.
We know that linear momentum
P = Mass x velocity
P = m v
At initial condition v = 0
P= 0
If there is no any external force then the linear momentum of the system will be conserve.And given that ,consider the system isolated.
Therefore the answer is e.
Answer:
18 miles east; 24 mph east
Explanation:
In order to find how far east of Wilmington is the ship after 1 hour, we just need to substitute t = 1 into the formula of the position.
The equation of the position is
where t is the time. Substituting t = 1,
So, the ship is 18 miles east of Wilmington.
To find the velocity of the boat, we just need to calculate the derivative of the position, so
And by substituting t = 1, we find the velocity after 1 hour:
And the direction is east.