What does the negative sign in F = - kx mean?

A quantity of 30.1 cm^3 of water at 22.4°C is placed in a freezer compartment and allowed to freeze to solid ice at - 7.2°C. How many joules of energy must be withdrawn from the water by the refrigerator?

Which waves move by replacing one particle with another

In a longitudinal wave, amplitude can be measured from the distance between high pressure areas of the wave called

Energy does not have to involve motion. Question 11 options: True False

An electromagnetic wave in a vacuum has a wavelength of 0.032 m. What is its frequency?

Which method is used to calculate the slope on a distance time graph

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.