What do you think a black hole is

After two hours, 1/16 of the initial amount of a certain radioactive isotope remains undecayed. The half-life of the isotope is:

Which of the following is an example of an electromagnetic wave? A. sunlight B. an earthquake C. the sound of kids playing D. butterflies flying through the air

3,730 watts equals about how many horsepower? 5 10 20 30

Phoebe is working on a project about the absorption of drugs in the body. Which body system does she have to study? A. urinary system B. skeletal system C. circulatory system D. muscular system

A car speed up from 15m/s to 30? m/s in 12 seconds what is the acceleration of the car

If gravity is not a force how does it accelerate objects?

How many DNA strands could you fit into a milimeter

A circuit contains two 1.5 volt batteries and a bulb with a resistance of 3 ohms. Calculate the current.

In an ac induction motor, the stator produces a rotating magnetic field that induces current in the rotor windings. The rotor current generates a magnetic field in opposition to the magnetic field of the stator, thereby causing the rotor to turn. A.

How many additional electrons does this atom of oxygen need in its valence shell to satisfy the octet rule?