Answer:
Materials that can be magnetized, which are also the ones that are strongly attracted to a magnet, are called ferromagnetic (or ferrimagnetic). These include the elements iron, nickel and cobalt and their alloys, some alloys of rare-earth metals, and some naturally occurring minerals such as lodestone.
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Answer:
Horizontal component,
Explanation:
It is given that,
Displacement of the submarine, d = 185 m
It is at an angle of 15 degrees below the horizontal. We need to find the horizontal component of the submarine's displacement. It is given by :
Substituting the values in above equation as :
So, the horizontal component of the submarine’s displacement is 178.69 meters. Hence, this is the required solution.
Current in an electrical circuit can effectively be reduced to zero by inserting a very high resistance
Water surface waves are examples of waves that are both longitudinal and transverse waves. As the wave travels through the water, a clockwise circles is observed. Therefore, the answer to this item is letter D. All the rest of the choices do not describe the water surface waves.
You will need human body specific heat, Cp, to do the maths.
In Internet I found this data: Cp = 3470 j / kg * °C
Now transform the power to work, by: P = Work / time => Work = P * time
Work = 1000 W * 39 min * 60 min/ s = 2,340,000 j
We will use T = 37 °C as the initial body temperature.
Now use Heat = m*Cp*ΔT = 70 kg * 3470 j / kg * °C * (T - 37°C) = 2,340,000 j
You can now isolate T = 2340000 / [70*3470] + 37°C = 46.6 °C