Aradio antenna points straight up from the ground. a person standing 1 km away receives radio waves with an intensity i 1 hw/m2. what is the intensity received by an airplane 2 km away, at an altitude of 500 m? 2km 500m 1km

The a992 steel rod bc has a diameter of 50 mm and is used as a strut to support the beam. determine the maximum intensity w of the uniform distributed load that can be applied to the beam without risk of causing the strut to buckle. take f.s. = 2 against bucklin

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.