Answer:
Vf = 73.4 m/s
Explanation:
This is the case of vertical motion where we have to find the final velocity of the penny when it hits the ground. We can use 3rd equation of motion to find the final velocity:
2gh = Vf² - Vi²
where,
g = 9.8 m/s²
h = height = 275 m
Vf = Final Velocity = ?
Vi = Initial Velocity = 0 m/s
Therefore,
2(9.8 m/s²)(275 m) = Vf² - (0 m/s)²
Vf = √5390 m²/s²
<u>Vf = 73.4 m/s</u>
To one decimal place. The rupture doesn't have to be very far away to damage your eardrum
Because the air gets stuck in the curves of the frissbee
Answer:
The voltage that must be supplied is
V=1750volts
Explanation:
Step one :
The formula for the electric field between the charges is given by
E=V/d
Where E= the electric field
V= voltage or potential difference
d= the distance between the two electrodes
Step two :
Given that
E=3.5*0^6v/m
d=0.05cm to meter we have 0.0005m
V= unknown
By making v subject of formula we can solve for the required voltage
V=d*E
V=0.0005*3.5*10^6
V=1750volts