Why does wifi bounce off walls instead of passing through

Why must science be open to change?

What must you do before you make a hypothesis?

Which statement describes the motion of a mass on a spring? It exhibits constant velocity motion. It exhibits simple harmonic motion. It exhibits circular motion. It exhibits only upward motion.

A 7.5 kg block is placed on a table. If it's bottom surface area is 0.6m2 how much pressure does the block exert on the table top?

Which statement does not correctly describe a theory? A. It is based on scientific evidence. B. It can be used to make predictions. C. It can be modified as new discoveries are made. D. It is directly testable.

Properties of elements within a ... on the periodic table change in a predictable way from one side of the table to the other

Two cards are drawn at random with replacement. Find P (not blue, then pink). (Remember, percent is a fraction with 100 in the denominator.)

A car dropped from a height of 44 meters fall to a height of zero meters. How fast will the car be traveling as it hits the ground? Assume air resistance is negligible (show all work)

A rock dropped from a 20 meter bridge falls into the river below. How long did it take to reach the water? What velocity did it hit the water with.

Which of the following is a characteristic of an electromagnetic wave? A. It travels at the speed of light B. It can be transverse or longitudinal C. It involves displacing a medium in the same direction the wave moves D.