There is a 50 g sample of Ra-229. It has a half-life of 4 minutes.

How much will be left after 12 minutes?

El Niño is actually good news for some parts of the world that experience a decreased chance of severe weather events. True False

Where does energy come from that fuels our physical activity

Explain how characteristic and traits are related

A woman runs at 3.50 m/s and in 10.0s she doubles her velocity. What is her acceleration?

Explain the advantages and disadvantages of using concentric circles in describing the solar system to an elementary school child.

Definition of mechanical weathering

If you double the force of an object what happens to the acceleration?

A particle (mass - 5 g. charge 30 mC) moves in a region of space where the electric field is uniform and is given by Ex 4.8 N/C, Ey-E. 0. If the velocity of the particle att-O is given by v,-40 m/s V, v-0, what is the speed of the particle at t3 s?

When the Egyptians noticed this celestial body rising before the Sun it indicated to them the coming of the Nile flood.

As you sit in front of a computer, which of the following is exerting the greatest gravitational force of attraction on you? A. Earth B. Your classmate across the room that you've had your eye on C. Your computer D. Your chair