Answer:
kinetic energy is the answer
Explanation:
kinetic energy is movement
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 total force in each direction has to be the same.
The total force of the blue team is
(220 + 340 + 180 + 560) = 1,300 N
The three members of the red team add up to
(250 + 160 + 420) = 830 N
In order to exactly match the 1,300 N of the blue team,
the fourth red-team guy must contribute an additional
(1,300 - 830) = 470 N .
The correct answer to the question is : 7 m/s.
EXPLANATION:
As per the question, the apple is at a height h = 2.5 m.
The initial velocity of the apple u = 0
We are asked to calculate the final velocity [ v ] of the apple before touching the ground.
As the apple is falling under gravity, then the acceleration produced on the apple is nothing else than acceleration due to gravity.
Hence, acceleration a = g =
From equation of kinematics , we know that -
⇒
⇒
⇒
⇒
⇒ [ans]
Hence, the final velocity is 7 m/s.
Answer: 28
Explanation:
Given
Circuit breaker current is
Power of the light bulb is
Voltage of the DC-circuit is
If the resistance are connected in parallel, they must have same voltage i.e. 120 V
So, Resistance is given by
For the 20 A current and 120 V battery, net resistance is
Suppose there are n resistance in the circuit connected in parallel.
Thus, there can maximum of 28 bulbs.