1. calculate the area of a conducting material with a temperature of 25degree conducting a heat quantity of 142kcal/hr and later reduced to a temperature of 15 degree. 2. The area of the conducting material is 152metre square with a proportionality constant. If the area given is 152 metre square, calculate the material using the above parameters​

Wavelength,frequency,and energy are related.what happens to a wave as it’s wavelength gets shorter?

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?

Amajor difference radio waves, visible light, and gamma rays is the of the photons, which results in different photon frequencies and wavelengths