Lexy and Jin study the diagram shown
Which best explains who is correct?
Lexy is correct because angle R is between the incident
wave, n = 0, and a diffracted wave.
Lexy is correct because angle R includes the diffracted
wave at n = 1.
Jin is correct because angle S is measured from the
barrier and includes n = 2, the wave that has the most
diffraction
Jin is correct because angle S is between the dimmest
order bands, n = 1 and n = 2.
の力
Lexy says that the diffraction angle is the one labeled R.
and Jin says that the diffraction angle is the one labeled S.

Asample of a gaseous substance changes into a liquid

We want to calculate the total metabolic heat generated by a singing canary taking into account heat transfer by radiation, convection and exhaling air. the air temperature is 20 oc, canary’s body internal and surface temperature is 33oc, external body surface convective heat transfer coefficient is 25.2 w/m2 .k, temperature difference between the inhaled and exhaled air is 4.3 oc, the ventilation rate is 0.74 cc of air per second, specific heat of air is 1.0066 kj/kg.k and density of air is 1.16 kg/m3 . assume the canary’s body to be a cylinder with 7 cm diameter and 9 cm length, and heat exchange is from the side as well as the top and bottom of cylinder. calculate 1) the net rate of heat lost by radiation, assuming heat gained by the bird through radiation from the surroundings is 11.5 w; 2) rate of heat transferred by convection to the surrounding air; 3) rate of heat transferred in the exhaling air without considering any internal evaporation; 4) total metabolic power.

If steel is more dense that lake water, why can a boat float