What do elements in the first two columns of the periodic table have in common? A. They have two valence electrons.

B. They tend to lose electrons to gain stability.

C. They react strongly with the alkali metals.

D. hey do not react with halogens.

A 2.0-kg block sits at the top of an inclined plane with a length of 4.12 m. If the coefficient of kinetic friction μk is 0.18 between the block and the plane, how long will it take the block to slide down the plane when released?

How loud is a gunshot? A. 120 decimals, B. 150 decimals, C. 100 decimals, or D. Other Answer. If D, describe what answer it is.

a 15 kg television sits on a shelf at a height of 0.3 m how much graviitional potential energy is added to the television when it is lifted to a shelf of height 1.0m

Benjamin Franklin has convinced his hapless assistant Mike Piepan to participate in an experiment on electiricty. Ben has set up lightning rod, the rod of which extends into his laboratory. MIke is suspended from the ceiling by an insulating rope.

Which three elements have strong magnetic properties? A. iron, cobalt, and nickel B. lithium, sodium, and potassium C. neon, argon, and krypton D. boron, carbon, and silicon

In what order do the earth, sun, and moon line up in a totla solar eclipse

StA A boat takes off from the dock at 2.5 m/s and speeds up at 4.2 m/s2 for 6.0 s. How far has the boat traveled? Round your answer to the nearest whole number.

How are weathering, erosion, and deposition related to the rock cycle

How do you know if an object is moving?

To escape Earth's gravitational pull, an object mush reach a speed of 11,180 meters per second. how fast is this kilometers per second