How many half lives for fluorine 18 occur in 11 mins

What is the charge of an atom with 16 protons and 18 electrons?

Aluminum has 13 energy levels. How many electrons are found in the outermost energy level for this atom? Which energy level is the outermost?

We should stress again that the Carnot engine does not exist in real life: It is a purely theoretical device, useful for understanding the limitations of heat engines.

When light is scattered while spreading out through the atmosphere, the light rays A) converge and follow the same direction. Eliminate B) deflect randomly in multiple directions. C) bounce back toward their initial direction.

John took 45 minutes to bicycle to his grandmother's house, a total of 4 kilometers. What was his velocity in km/hr?

The average radius of Mars is 3,397 km. If Mars completes one rotation in 24.6 hours, what is the tangential speed of objects on the planet's surface? Round your answer to the nearest whole number.

A car with a mass of 1,500 kg doubles its speed from 50 km/h to 100 km/h. by how many times does the kinetic energy of the car increase

3. Is there a way to dissolve more sugar into a solution that it should hold at that temperature? Explain how this is done and what the solution would be called.

Like matter, energy cycles continuously through an ecosystem. a. True b. False User: Like matter, energy cycles continuously through an ecosystem. True or False

A room is being accelerated through space at 7 m/s2 relative to the "fixed stars." it is far away from any massive objects. if a man weighs 500 n when he is at rest on earth, how much will he weigh in the room?