Answer:
R = 4.18 * 10^8ohms
Explanation:
R=resistance in ohms=?
ρ=resistivity of material in ohms meters = 1.68*10^-8 oh ohm meters
L= length of the object (m) = 4.4m
A = cross-sectional area of the object in square meters (m^2)= πr^2
r = (1.5mm/1000)/2= 0.00075m
A=π*(0.00075)^2 = 1.76714586764426*10^-6
Approximately, A = 1.767m^2
R = ρL/A= (1.68*10^8Ω⋅m) * (4.4m)/(1.767m^2)
R = 418336162.988115 ohms
Approximately, R = 4.18 * 10^8ohms.
There are already derived equations for rectilinear motion at constant acceleration. For free falling objects, they are further simplified because only the gravitational force is acting on the body. The equations for time and velocity at impact are:
t = √2h/g
v = √2gh
where
h is the height
g is the acceleration due to gravity equal to 9.81 m/s²
1. t = √2(380 m)/9.81 m/s² = 8.8 seconds
2. v = √2(9.81 m/s²)(380 m) = 86.3 m/s
Answer:
C. 960.8°C
Explanation:
When freezing, silver changes state from liquid to solid. Also, when melting, silver changes state from solid to liquid. Therefore, the freezing point and melting point share the same temperature. In this case, 960.8°C