Why does the core of the sun contain more helium and less hydrogen than the surface of the sun?

How are metamorphic rocks like igneous rocks? How are they like sedimentary rocks?

Someone would tell me some important questions of physics?

What would be an example of higher concentration for a liquid? A. 1% milk versus 2% milk B. cooling a liquid until it nearly freezes C. boiling pure water until half its mass has left the pot D.

How does the sun transmit energy from millions of miles away into the Earth system? 'Energy' and 'power' are often confused, but aren't the same.

A rock is thrown upwards at 15 m/s and reaches a maximum height before it falls back to Earth. What is its velocity immediately after it reaches this maximum height? A) 0 m/s B) O m/s downwards C) 15 m/s D 9.8 m/s2

In what way would a digital thermometer be preferable to those from a liquid-based thermometer? Digital thermometer readings are easier to use when performing calculations.

Why does the core of the sun contain more helium and less hydrogen than the surface of the sun?

What happens to a light ray passing through the center of a lens?

A spider crawling across a table leaps onto a magazine blocking its path. The initial velocity of the spider is 0.870 m/s at an angle of 35.0° above the table, and it lands on the magazine 0.0770s after leaving the table. Ignore air resistance.

A force of 5 N accelerates an object. The object's mass is 50 g. What is the acceleration of the object? (Formula: F=ma)