A temperature of a 0.7 kg sample of copper decreases from 75.0 °C to 25.0 °C. How much heat flows out of the copper sample? The specific heat of copper is 387 J/kg C.
A-5389 J
B-27836)
C-4837 )
D-13545)

Agas is contained in a vertical, frictionless piston–cylinder device. the piston has a mass of 3.2 kg and a cross-sectional area of 35 cm2. a compressed spring above the piston exerts a force of 190 n on the piston. if the atmospheric pressure is 95 kpa, determine the pressure inside the cylinder.

The sun’s mass is 2.0×10^ 30 kg, its radius is 7.0×10 5 km, and it has a rotational period of approximately 28 days. if the sun should collapse into a white dwarf of radius 3.5×10 3 km, what would its period be if no mass were ejected and a sphere of uniform density can model the sun both before and after?

Ain is , is 's of ? 0.62 0.79 1.27 1.50