How do scientist learn about stars and galaxies even tough humans have never been there?

A location gets its drinking water from wells drilled into the Earth. The people in the location have reported that their drinking water has a foul smell since a few days.

Which vector has an x-component with a length of 4?

Which is a heterogeneous mixture? A. a glass of tap water B. a mug of hot cocoa C. a gallon of milk D. a jar of mixed nuts

Pakistan and bangladesh are two countries on the subcontinent

What is molecular magnet

What are the adaptions of the tundra

Based on the number of valence electrons, what is the correct formula when nitrogen bonds to hydrogen? A) NH2 B) NH3 C) NH4 D) N2H

Choose the correct statement about the currents through the elements. Choose the correct statement about the currents through the elements. The currents in series-connected elements are not the same and depend on a current or a voltage source.

5 potential causes of infertility

Suppose you place a ball in the middle of a wagon, and then accelerate the wagon forward. Describe the motion of the ball relative to the ground. - Describe its motion relative to the wagon.