How do elements change as you go down a group in the periodic table?

A. The average atomic mass decreases.

B. The atomic number increases.

C. The atoms become more metallic.

D. The number of valence electrons increases.

Energy transferred as heat occurs between two bodies in thermal contract when they differ in which of the following properties? a) mass b) specific heat c) density d) temperature

Which term refers to energy derived from heat inside the Earth? a) geothermal energy b) solar energy c) fossil fuel d) volcanic energy

When a brick is dropped from the roof of a house, it lands on the ground with a speed v. What will the speed at ground level be for an identical brick dropped from a roof twice as high as the first one?

A train is travelling at 15m/s. It accelerates at 3m/s² for 20 seconds. How far does the train travel in this time?

In the equation for elastic potential energy below, what is represented by the symbol k? Ee = ½ * k * e²

Do you think an observer on another planet in the solar system might see eclipses

A. A vector is any element of a vector space. Is this statement true or false? A. True by the definition of a vector space B. False; not all vectors are elements of a vector space. C. False; a vector space is any element of a vector.

19 Which gas is the most abundant greenhouse gas? A. ozone B. chlorofluorocarbon C. carbon dioxide OD. methane E. water vapor Reset Next

The plates of a parallel-plate capacitor are maintained with a constant voltage by a battery as they are pushed together, without touching. How is the amount of charge on the plates affected during this process? a.

Which of the following creates a longitudinal wave? A. striking a gong B. turning on a flashlight C. shaking a rope up and down D. dropping a stone into a pond