Answer:
267.07 km
Explanation:
The given earth's radius is 6378.1 km
In the year 2014, the magnetic north pole was situated 2.40° away from the geographical north pole
2.40°
The linear distance can be calculated using the formula 
Thus, travelling from the magnetic north pole to the geographic north pole requires a distance of 267.07 km
Answer:
a. β = 8.23 K
b. β = 28.815 K
Explanation:
The performance of the heat pump can be calculated using the formula
β = TH / (TH - TC)
a.
TH = 15 ° C + 273.15 K = 288.15 K
TC = - 20 ° C + 273.15 K = 253.15 K
β = 288.15 K / (288.15 K - 253.15 K)
β = 8.23 K
b.
TH = 15 ° C + 273.15 K = 288.15 K
TC = 5 ° C + 273.15 K = 278.15 K
β = 288.15 K / (288.15 K - 278.15 K)
β = 28.815 K
This is due to the fact that below 4°c, water behaves differently than other substances and decreases in density as its temperature drops further.
Answer:
The energy delivered is E = 0.18 J
Explanation:
Given,
Battery voltage, V = 9 V
Charge in the circuit, Q = 20 mC
= 20 x 10³ C
Energy supplied in the circuit can be computed as
E = Q V
E = 20 x 10⁻³ x 9
E = 180 x 10⁻³
E equals 0.18 J.
The energy delivered in the circuit is therefore E = 0.18 J
Answer:
2.5 m
Explanation:
Billboard worker's weight = 800 N
Number of ropes = 2
Length of scaffold = 4 m
Weight of scaffold = 500 N
Tension present in rope = 550 N
The total torques will be
The worker is positioned at 2.5 m
