URGENT WILL MARK BRAINIEST: A penguin of mass 30 kg sits motionless on a horizontal ice surface. Calculate the force of gravity acting on the penguin. Show your equation.

If you quadruple the temperature of a black body, by what factor will the total energy radiated per second per square meter increase? 1,024 64 16 4 256 submit answer

An object is 10 cm from the mirror, its height is 1 cm and the focal length is 5 cm. what is the image height? (indicate the object orientation by including the + or - sign with the answer.) hi = cm +1 -1 +10 -10

The material that keeps its new shape after it is stretched is called?