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

Nitrogen has five valence electrons. What is the correct lewis structure for nitrogen?

The brakes of a car are applied to give it an acceleration of - 2m/s^2. The car comes to a stop in 3s. What was its speed when the brakes were applied?

A 6.0 kilogram object undergoes an acceleration of 92.0 m/s squared what is the magnitude of the net force acting on the object

A 0.50g leaf falls from a branch 4.0m off the ground to a bird's nest 2.5m off the ground. How much gravitational potential energy did the leaf loose?

What would happen if cell membranes suddenly became permeable instead of selectively permeable could cells remain alive?

Lexy throws a dart with an initial velocity of 25m/a at an angle of 60 degrees relative to the ground. What is the approximate vertical component of the i ritual velocity?

True or false electronic machines with no moving parts experience friction and get hot because electricity is moving through the wires

I'm having trouble figuring out how to study for my science test, it's based off of everything we've learned but I'm afraid there's some things I misunderstood during the year that will effect me on the test, and suggestions?!!

The air over Earth's surfaces absorbs heat from the materials of Earth. In Section 3 of the experiment, the air over the sand the air over the water because sand water.

Describe the rise and fall of a basketball using the concepts of kinetic energy and potential energy