Answer:
Explanation:
A. Using
E= ma/q
E=m/q(2s/t²)
So
E= 9.1x10^-31/1.6*10^-19( 2*4.5/ 3*10-12)
E=5.7NC
The electric field has to be downward since the force is positive that is upward
B.
The electron acceleration is of the order of 10^11 times greater so for practical purposes we neglect the effect of gravity
At sea level, you're 6400 km away from the earth's center. Where gravity is 0.4 fewer,
in other words 0.6 its sea level value, you're x km from the center, where:
(6400 / x) ^ 2 = 0.6)
Take note that gravity is an opposite square force.
So 6400 / x = 0.7746
so x = 8262 km from the Earth's center
so you're 8262 – 6400 = 1862 km above the Earth's surface
The answer would not be A, because if the sun converts into a giant, the star will eventually become a white dwarf due to the fact it was previously a giant. Thus the answer would be B, since the sun does not become a supergiant.
Answer:
60 cm²
Explanation:
Pressure = Force / Surface area
This is a 2 stage problem which requires working out pressure of piston A and then using that pressure from piston A to calculate the surface area of piston B
Firstly work out pressure of Piston A:
Pressure = 200 / 4
Pressure = 50 N/cm²
Then work out the Surface area of piston B :
Since the pressure is transferred the pressure stays the same so :
Surface area = Force / Pressure
Surface area = 3000 / 50
Surface area = 60 cm²
I did chocolate
1- 1:02
2-47 secs
3- 17 secs
Hope I helped ;)
