Alarge region of gas and dust that may contain as many as one million solar masses is called a
a. galaxy
b. protostar
c. supernova remnant
d. giant molecular cloud

Aballet student who learns with the of his instructor is demonstrating learning.

Gunpowder residue is most likely to show up where on a shooters hands

Assume you measured the mass of the cart to be (500 ± 1) g and the mass of the additional mass you put on the cart to be (500 ± 1) g as well. since the scale you are using in the lab cannot measure objects heavier than 600g you will have to sum up individual pieces and propagate the error. so what would be the mass and the standard error of the cart and the mass