A 500.-kilogram roller coaster starts from rest at the top of an 80.0-meter hill. What is its speed at the bottom of this hill?

3. Why do elements in a group have similar properties?

If love is the answer, then what is the question?

When current increases and resistance remains constant what happens to voltage?

There must be equal amounts of mass on both side of the center of mass of an object. True or False

Which sentence uses the correct form of the verb choose? a Dad chosed a striped tie to wear with his suit. b Dad chose a striped tie to wear with his suit. c Dad chosen a striped tie to wear with his suit.

Why does it hurt your hands when you carry heavy shopping in carrier bags?

Why did scientists choose carbon as a base for the atomic mass unit? Which isotope of carbon did they use?

What organelle is found in all animal cells and some plant cells

Basic of Archimedes's principle of how fluid can make body to float and sink.

A bullet is accelerated down the barrel of a gun by hot gases produced in the combustion of gun powder. What is the average force (in N) exerted on a 0.0500 kg bullet to accelerate it to a speed of 625 m/s in a time of 1.10 ms (milliseconds)