A person is running on a track. Which of the following forces propels the runner forward?

Which of the following lists the stars in order from least density to greatest density? A. white dwarf, neutron star, main sequence star, giant B. giant, main sequence star, white dwarf, neutron star C.

What holds planets, stars, gas, and dust together in a galaxy?

A car drives from east to west over a bridge supported at either end by two pillars. The bridge and car weight is 80 tons. One pillar is pushing up with a force of 30 N. What force is applied to the bridge at the other pillar?

Which is an example of potential energy? a. a swimmer kicking their legs b. a car driving on the road c. an arrow flying at a target d. a yo-yo in someone's hand

What are the 3 main types of air pollutants produced by electrical power plants in the US?

In otherwise empty space is a system of 4 particles, each of the same mass. The accelerations of the particles are as follows: a1 = ˆi a a2 = ˆj a 2 a3 = - (ˆi + ˆj) (2 a) a4 = (ˆi - ˆj) (3 a), where a > 0 is a constant.

How many electrons does a neutral atom of oxygen-18 have? 8 O 16.00 A. 8 B. 10 C. 18 D. 16

What is average velocity?

A bicycle moves from rest to 5 m/s in 5 sec. what is the acceleration of the bicycle

A proton moving in a region of a space does not experience any acceleration in the direction of motion.