Una esfera metálica de 10 kg de masa está situada sobre el suelo terrestre ,¿Calcula la fuerza de atracción entre la esfera y otra esfera igual si sus centros están a 50 cm uno del otro

Zeros that follow non-zeros numbers and are also to the right of a decimal point are significant

An incident ray through the focal point of a spherical mirror will: reflect through the center of curvature. reflect back through the focal point. reflect parallel to the principle axis. reflect the same direction as the incident ray.

If a refrigerator is a heat pump that follows the first law of thermodynamics, how much heat was removed from food inside of the refrigerator if it released 380j of energy to the room?