The gas used to fill party ballons contain only helium atoms. This make helium a (n).

What can iron filings sprinkled on a piece of paper demonstrate? A. the clockwise motion of the magnetic field B. the counter-clockwise motion of the magnetic field C. the pattern of the magnetic field lines D. the distortion of the magnetic fields

The only thing that distinguishes one light ray from another is its ...

For a growing quantity to reach a value 32 times its initial value, how many doubling times are required? A) 4 B) 5 C) 16 D) 8

The density of mercury is 13,600 kg/m³. Determine the mass of 10.0 cm³ of mercury.

During or after exercise, it is normal for a student to comment that his/her heart feels like it is "beating out of my chest."

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)