1. Why is sonar a more accurate way of mapping the ocean floor than weighted lines?

a joined transmitter and beneficiary called a transducer sends a sound heartbeat straight down into the water and the beat travels through the water and bouces off the sea base with the goal that the transducer can pickup the reflected sound

Explanation:

the core of the sun is so hot and there is so much pressure, nuclear fusion takes place, hydrogen is changed to helium. nuclear fusion creates heat and photons. when the heat reaches the earth it warms the molecules of the atmosphere, and they warm other molecules and so on.

answer; both surfaces of the membrane are nonpermeable