An isotope decreased to one fourth its original amount in 18 months. What is the half life of this radioactive isotope?

In which of these samples do the molecules mist likely have the least kinetic energy

Two 8.0 Ω lightbulbs are connected in a 12 V series circuit. What is the power of both glowing bulbs?

True or false: If you perceive a leaf as green, then the leaf is absorbing all the frequencies of visible light except for that associated with green.

Match the term to its description. Ammonia Read Answer Items for Question 1 Nitrogen gas Read Answer Items for Question 1 Nitrification Read Answer Items for Question 1 Lightning and bacteria Read Answer Items for Question 1 Eutrophication Read

A Knight of the Round Table fires off a vat of burning pitch from his catapult at 15.9 m/s, at 30 ◦ above the horizontal. The acceleration of gravity is 9.8 m/s2. How long is it in the air?

Newton's First Law says that an object at rest will stay at rest, and an object in motion will stay in motion unless: Question 1 options: Acted on by a balanced force Acted on by an unbalanced force Acted on by equal forces in opposite direction

Which statement is true for electric field lines? A. Field lines should always be parallel to the equipotential lines. B. Field lines should always be perpendicular to the equipotential lines. C. Field lines should always be parallel to each other.

What distance was an object moved by a force of 40 N if the work was 600 joules

How do I use a metric conversions chart

Do you think Pluto should be considered a planet? Why or why not?