What process marks the birth of a star?

What is the shape of popcorn

What is the low end of the range of surface temperature of white stars

Two boys searching for buried treasure are standing underneath the same tree. One boy walks 18 m east and then 18 m north. The other boy walks 16 m west and then 11 m north. Find the scalar product of their net displacements from the tree.

An object's acceleration is given by a (t) = a (t) = 60t m/s260t m/s2. if it begins at rest, how far has it gone after 10 seconds?

If you place one staple on an electronic balance, the balance still reads 0.0 grams. However, if you place 210 staple on the balance, it reads 6.80 grams. What is the mass of one state staple

If the graph represents speed what is measured on the x and y axes

It is difficult to lift a heavy stone than the lighter one on the earth, why?

The vapor pressure of ethanol at 25 degrees C is 7.83 kPa. Calculate the vapor pressure in atm. Round answer to 3 significant digits.

According to Newton's second law of motion acceleration or an object depends upon the ___ of the object and the ___ Acting on it. I'm confused on what the blanks are. I can't find them.

What is the concentration of H + ions at a pH = 7?