How long is a half life for c14

3 small identical balls have charges - 3*10^-12,8*10^-12 and 4*10^-12 find the charge

Which of the following is true? A. The Earth and Moon both exert a gravitational force on each other. B. The Moon exerts a gravitational force on the Earth, but the Earth does not exert a gravitational force on the Moon. C.

Scientists always prove or disprove their explanations by?

A data table shows the height of a person on his birthday each year for ten years. What is the the dependent variable? Provide evidence to support your claim, and explain your reasoning.

Why are objects that fall near Earth's surface rarely in free fall? Gravity does not act on objects near Earth's surface. Air exerts forces on falling objects near Earth's surface. The objects do not reach terminal velocity.

The sum of two or more vectors is called a vector. Answer kere

when a piece of paper is held with one face perpendicular to a uniform electric field the flux through it is 25N. m^2/c. when the paper is turned 25 degree with respect to the field the flux through it is:

Calculate the kinetic energy of the following object. The Earthr with a mass of 5.97 x 10 (24) moving at a velocity of 461 m/s

Which of the following could possibly be predicted? Earthquakes Landslides Foreshocks Volcanic eruptions

A frictional force is the force exerted by a surface as an object moves across it; therefore, it is considered a contact force. true or false