<h3><u>Answer;</u></h3>
= 356.2 m/s
<h3><u>Explanation</u>;</h3>
The speed of the wave is dependent on temperature of the medium;
The equation to use will be;
Speed = 331 + 0.6 T ; where T is the temperature in degrees Celsius.
T = 42 °C
Therefore;
speed = 331 + 0.6 × 42
<u>= 356.2 m/s</u>
Friction is the force that acts on the opposite side of direction of force, thus it manages to decelerate an object, so it acts upward along the plane
By the work-energy theorem, the total work done on the mass by the spring is equal to the change in the mass's kinetic energy:
<em>W</em> = ∆<em>K</em>
and the work done by a spring with constant <em>k</em> as it gets compressed a distance <em>x</em> is -1/2 <em>kx</em> ²; the work it does is negative because the restoring force of the spring points opposite the direction in which it's getting compressed.
So we have
-1/2 <em>k</em> (0.15 m)² = 0 - 1/2 (2.0 kg) (3.0 m/s)²
Solve for <em>k</em> to get <em>k</em> = 800 N/m.
Electrical
Electrical would be the energy that involves the flow of positive changes
The answer is radiation I believe