Suppose a logs mass is 5kg. after burning, the mass of the ash is 1kg. explain what may have happened to the other 4kg

Do the data for the first part of the experiment support or refute the first hypothesis? Be sure to explain your answer and include how the variables changed in the first part of the experiment.

What causes the spiral structural in milky way?

In what type of wave do the particles in the medium experience forces parallel to the wave's direction?

What factors might limit the maximum body size to which land vertebrates can grow?

Jack always drank soda whenever he hung out with his friends. On one particular occasion, Jack didn't have any soda to drink and as soon as he saw his friends, he became thirsty.

Both matter and energy can eneter and exit which of the following systems? A. open only B. both open and closed C. isolated only D. both closed and isolated

1. Find the charge if the number of electrons is 4 x 10-18

Which of the following describes resistance force?

Ursa Minor contains the pole star, Polaris, and the asterism known as the Little Dipper. From most locations in the Northern Hemisphere, all of the stars in Ursa Minor are circumpolar.

What is an organism ability to maintain a steady internal condition called