When divided by Δt, (vf - vi) is used to determine which characteristic?

speed

direction

acceleration

displacement

Universal scale. Suppose we wanted to make a scale model of the Local group or galaxies in which the Milky Way Galaxy was the size of a doughnut (-10 cm in diameter).

The current in a radio measures 12 amps. The resistance of the radio is 4 ohms. What is the voltage? 3 V 48 V 3 A 48 ohms

Your teacher burns a piece of steel wool in class, demonstrating the chemical property, flammability. You are curious to see what other things can demonstrate chemical properties. Which of these does not demonstrate a chemical change?

What traits did Sir William Gilbert have that made him a good scientist?

A positive charge means: a. surplus of electrons b. lack of electrons c. excess atoms d. gained protons

Which of the following describes the products of a chemical reaction? A. The original materials B. The chemicals on the right side of a chemical equation C. The chemicals on the left side of a chemical equation D. The substances that are changed

What does it mean when we say an atom has decayed?

The first excited state of a particular atom in a gas is 5.2 eV above the ground state. A moving electron collides with one of these atoms, and excites the atom to its first excited state.

How do your teeth work as a wedge?

According to the Big Bang theory timeline, all matter and energy was compressed into a very small volume at an extremely high temperature. a. True b. False