Answer: 11 km/h at 339° compass
Explanation:
A sees B moving south at 0 km/h
A is moving north at 12cos30 = 10.392 km/h
Therefore B must be moving north at 10.392 k/h
A is moving east at 12sin30 = 6 km/h
B appears to be moving west at 10 km/h
Therefore B must be moving west at 10 - 6 = 4 km/h
B is moving v = √(4² + 10.392²) = 11.135... 11 km/h
θ = arctan( -4 / 10.392) = -21.05 = 339°
Explanation:
the answer to this question would be mj.us 1 and minus 3
Solar panels convert the sun's light into usable solar energy using N-type and P-type semiconductor material. When sunlight is absorbed by these materials, the solar energy knocks electrons loose from their atoms, allowing the electrons to flow through the material to produce electricity.
Answer:
383.6 nJ
Explanation:
The energy stored in a capacitor is given by the formula:
where
C is the capacitance
V is the voltage applied
In this problem, we have
C = 14.8 nF is the capacitance of the capacitor
V = 7.2 V is the voltage
Substituting into the equation, we find:
Answer: C) velocity is a vector and requires a direction.
Explanation:
In physics, there are two types of quantities:
- scalars: these are quantities that have only a magnitude
- vectors: there are quantities that have both magnitude and direction
As an example, speed is a scalar while velocity is a vector. Therefore, speed has only a magnitude, while velocity has both magnitude and direction: therefore, the difference between the two quantities is that velocity is a vector and requires a direction, as stated in option C.
