Which gas became part of Earths atmosphere mainly as a result of the evolution of life forms?

The velocity of waves having wavelength 0.643 m and frequency 3.25 e 10 hz is

A tiny 0.0250 - microgram oil drop containing 15 excess electrons is suspended between to horizontally closely-spaced metal plates that carry equal but opposite charges on their facing surfaces. The plates are both circular with a radius of 6.50cm.

A survey of 500 college students found that the percentage of students who went without using digital technology for up to 1 hr was 67.

Click the light switch to turn it on. What happens? A. The lightbulb turns on. B. The lightbulb does not change. C. The lightbulb explodes.

Under which condition will air behave as conductor? a) low altitude b) high humidity c) low humidity d) high pressure

Why does a charged balloon stick to a neutral wall?

While the cart is moving along an aisle, it comes in contact with a smear of margarine that had recently been dropped on the floor. Suddenly the friction force is reduced for - 40.0 newtons to - 20.0 newtons.

When a solo eclipse occurs. It is seen in

Newtons third law describes the forces between two colliding objects. use this connection to explain the forces acting when you kick a soccer ball

In the heat equation, what does c represent