Why would ships or trains be a better choice than airplanes for moving wheat

Use the periodic table to identify the number of core electrons and the number of valence electrons in each case below. Potassium (K) : 1s22s22p63s23p64s1 core electrons valence electrons

Which of the following is created by fans? a) Air flow b) Water flow c) Wastewater flow d) Vacuum flow

If you could travel to a star 25 light-years away and return to earth at nearly the speed of light, how much time would elapse on earth?

If you turn up the temperature of an oven from 250 degrees kelvin to 500 degrees, the oven will be radiating how much more energy?

What two variables is acceleration dependent on? What is the relationship between these variables and acceleration? (i. E. If you increase one variable what happens to the acceleration?)

Which of the following descibes the refraction of a wave?

A 590-kg rocket is at rest on the launch pad. what upward thrust force is needed to accelerate the rocket uniformly to an upward speed of 28 m/s in 3.3 s?

Is work being done when a hiker puts on a bag

run at the same speed and in the same direction, and they both run for the same amount of time, what can you say about the distance they travel?

How can you show positive body languages with your mouth