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Q3 - it's surface emits most temperature and wavelength - it's radiation does not depend on the direction - it's radiation in a vacuum depends only on a temperature

1a)power is the amount of energy transferred or converted per unit time. In the International System of Units, the unit of power is the watt, equal to one joule per second. In older works, power is sometimes called activity. Power is a scalar quantity. 1b)Force is defined as the rate of change of momentum. For an unchanging mass, this is equivalent to mass x acceleration. So, 1 N = 1 kg m s-2, or 1 kg m/s2. 1c)Pressure is a physical quantity. Physical quantities describe measurable features of bodies or processes related to them. Pressure describes the ratio of force per area. Pressure describes the ratio of force per area. [P] = N/m² = Pa. The SI unit (international system of units) of pressure P is the Pascal (Pa).

5a. Diffusion of gases is the movement of gaseous molecules from a region of high concentration to low concentration until equilibrium is established b. -Molecular mass -Density

Question 2 Original length (Lo) = 10cm New length (L) = 10.01cm Force (F) = 20N F=Ke e = L-Lo e = 10.01cm -10.00cm e = 0.01cm e = 0.01 X 10^-2m K = F/e K = 20N/0.01 X 10^-2m = 200,000Nm^-1 = 200kNm^-1

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