If element X has 39 protons, how many electrons does it have?

What is the eccentricity of the ellipse if its major axis is twice its minor axis?

Select each correct answer. If an object is moving, the amount of kinetic energy it has directly depends upon which of the following factors? the object's density the object's mass the object's shape the object's velocity

What organisms only survive in the wild or nature

An object that revolves around a planet is called a

Which statement about energy generated from wind is true? A. Wind is free "fuel," and government taxes on its use are lower than those on fossil fuel are B. Wind power is abundant everywhere, and battery storage of excess power is inexpensive. C.

Why is a block of gold is more dense than a block of iron of equal size?

How much work is required to uniformly accelerate a merry-go-round of mass 1490 kg and a radius of 7.80 m from rest to a rotational rate of 1 revolution per 8.33 s? Model the merry-go-round as a solid cylinder (I = ½ MR2).

What percentage of North American adults may be functioning below their potential due to prolonged exposure to stress

Give a example of frequency which an elephant can hear and a tiger cannot hear include a unit in ansawer

Why do you keep moving forward when you slam on the brakes of your bike?